chore(main): release 0.105.0 (#1583 )

🤖 I have created a release *beep* *boop* --- ## [0.105.0](https://github.com/agentclientprotocol/claude-agent-acp/compare/v0.104.1...v0.105.0) (2026-11-10) ### Features * serve session/set_title on ACP v1 and v2 ([#1585](https://github.com/agentclientprotocol/claude-agent-acp/issues/1585)) ([a4a8534](a4a8534c23)) * serve session/status on v1 and v2 ([#1584](https://github.com/agentclientprotocol/claude-agent-acp/issues/1584)) ([6bc2e05](6bc2e058cb)) ### Bug Fixes * include inline model settings in the model picker ([#1488](https://github.com/agentclientprotocol/claude-agent-acp/issues/1488)) ([36cb674](36cb674589)) * keep a v2 session idle when the model changes between turns ([#1586](https://github.com/agentclientprotocol/claude-agent-acp/issues/1586)) ([f5d7916](f5d79167a6)) * report Claude Code's API error message as a notice in v2 ([#1582](https://github.com/agentclientprotocol/claude-agent-acp/issues/1582)) ([99cc1f3](99cc1f3245)) --- This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please). Co-authored-by: acp-release-bot[bot] <246668977+acp-release-bot[bot]@users.noreply.github.com>
fix: include inline model settings in the model picker (#1488 )
2026-11-11 11:51:14 +00:00 · 2026-11-10 21:51:06 +01:00 · 2026-11-10 21:11:22 +01:00 · 2026-11-10 18:49:50 +00:00 · 2026-11-10 18:28:46 +00:00 · 2026-11-10 18:11:39 +00:00
91 changed files with 1815 additions and 473 deletions
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.104.0"
+  ".": "0.105.0"
 }
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,29 @@
 # Changelog

+## [0.105.0](https://github.com/agentclientprotocol/claude-agent-acp/compare/v0.104.1...v0.105.0) (2026-11-10)
+
+
+### Features
+
+* serve session/set_title on ACP v1 and v2 ([#1585](https://github.com/agentclientprotocol/claude-agent-acp/issues/1585)) ([a4a8534](https://github.com/agentclientprotocol/claude-agent-acp/commit/a4a8534c23b08cdfd7f656d25f9ab16068fd8ffd))
+* serve session/status on v1 and v2 ([#1584](https://github.com/agentclientprotocol/claude-agent-acp/issues/1584)) ([6bc2e05](https://github.com/agentclientprotocol/claude-agent-acp/commit/6bc2e058cb27624b4307462ac46167535af400d1))
+
+
+### Bug Fixes
+
+* include inline model settings in the model picker ([#1488](https://github.com/agentclientprotocol/claude-agent-acp/issues/1488)) ([36cb674](https://github.com/agentclientprotocol/claude-agent-acp/commit/36cb6745897bf9dabcb967b54233c42b860436b3))
+* keep a v2 session idle when the model changes between turns ([#1586](https://github.com/agentclientprotocol/claude-agent-acp/issues/1586)) ([f5d7916](https://github.com/agentclientprotocol/claude-agent-acp/commit/f5d79167a649737bdeb1ce3b55ad449a34bb9d47))
+* report Claude Code's API error message as a notice in v2 ([#1582](https://github.com/agentclientprotocol/claude-agent-acp/issues/1582)) ([99cc1f3](https://github.com/agentclientprotocol/claude-agent-acp/commit/99cc1f324586fad07f1da14bb9764cd16c64e920))
+
+## [0.104.1](https://github.com/agentclientprotocol/claude-agent-acp/compare/v0.104.0...v0.104.1) (2026-11-10)
+
+
+### Bug Fixes
+
+* carry the auth detail in the ACP account label ([#1573](https://github.com/agentclientprotocol/claude-agent-acp/issues/1573)) ([3d6eb7b](https://github.com/agentclientprotocol/claude-agent-acp/commit/3d6eb7b5b650a1f9e5d2e869e92e313c32dbdc86))
+* distinguish Ultra from Max in auth status ([#1574](https://github.com/agentclientprotocol/claude-agent-acp/issues/1574)) ([7d95d30](https://github.com/agentclientprotocol/claude-agent-acp/commit/7d95d30ec3a4813d580b3bfdedb08f03d93a3571))
+* update to @anthropic-ai/claude-agent-sdk 0.3.322 ([#1577](https://github.com/agentclientprotocol/claude-agent-acp/issues/1577)) ([b89e449](https://github.com/agentclientprotocol/claude-agent-acp/commit/b89e4497da9184072e7f3c4bb28de79801659222))
+
 ## [0.104.0](https://github.com/agentclientprotocol/claude-agent-acp/compare/v0.103.0...v0.104.0) (2026-11-10)


--- a/README.md
+++ b/README.md
@@ -140,7 +140,7 @@ for v2 is negotiated down to v1. With `v2`, the adapter rejects the `initialize`

 On v2 the adapter serves the session baseline (`session/new`, `session/list`, `session/resume`
 with replay, `session/close`, `session/prompt`, `session/cancel`), `session/delete`,
-`session/fork`, additional directories, config options (the mode is one), plans, notices,
+`session/fork`, `session/status`, `session/set_title`, additional directories, config options (the mode is one), plans, notices,
 compaction, display terminals for commands, permission requests, elicitation, providers, auth, and
 [subagents](#subagent-sessions). Steering is v1 only for now.

--- a/docs/air-extensions.md
+++ b/docs/air-extensions.md
@@ -228,7 +228,7 @@ The adapter keeps them where they are.

 ## Auth source display

-The connection-scoped `_auth/status_update` continues to report agent-owned authentication, not client-owned `providers/set` routing. The adapter also reports the same identity through the ACP `auth/status` method and `auth/status_update` notification (advertised as `auth.status`), with `kind`, `detail` and `plan` under the account's `_meta.claudeCode`. Each notification is sent when its own payload changed. `auth/status` answers with the identity last reported and starts a new read, whose change arrives as a notification. When the active key source is `apiKeyHelper`, the adapter reads the effective helper command through SDK `resolveSettings` / the session's `SettingsManager`, including programmatic settings overrides.
+The connection-scoped `_auth/status_update` continues to report agent-owned authentication, not client-owned `providers/set` routing. The adapter also reports the same identity through the ACP `auth/status` method and `auth/status_update` notification (advertised as `auth.status`), with `kind`, `detail` and `plan` under the account's `_meta.claudeCode`. The account's `label` also carries a `detail` in parentheses, e.g. `Anthropic API key (ANTHROPIC_API_KEY)`. Each notification is sent when its own payload changed. `auth/status` answers with the identity last reported and starts a new read, whose change arrives as a notification. When the active key source is `apiKeyHelper`, the adapter reads the effective helper command through SDK `resolveSettings` / the session's `SettingsManager`, including programmatic settings overrides.

 A command containing the whole word `central` and the word sequence `proxy start` is displayed as:

@@ -240,6 +240,8 @@ Matching is case-insensitive and accepts multiple whitespace characters between

 Other active helpers use `label: "Anthropic API key"` and `detail: "API key helper"`; unknown key-source identifiers are not exposed as display text. CLI and SDK reads share this presentation, retain stale-probe protection, and suppress unchanged notifications.

+For Max subscriptions, the existing `claude auth status --json` probe's optional `planTier` distinguishes `max_20x` (displayed as `Claude Ultra`) from `max_5x` (`Claude Max`). Missing, unrecognized, or malformed tiers fall back to the subscription's usual label. Other subscriptions and auth sources keep their existing classification. The raw `account.plan` and ACP `_meta.claudeCode.plan` remain unchanged. SDK account reads lack the tier, so they preserve the known label for the same account and plan; a fresh CLI read replaces it, including when the tier is absent. This is display metadata, not an entitlement check, and requires no additional probe or direct credential-file reads.
+
 ## Zed conventions

 The adapter keeps these Zed and upstream conventions unchanged for every client.
@@ -1406,6 +1408,8 @@ Each row carries `_meta.jetbrains.air` with flat row fields of the RFDs. `archiv

 `_session/rename { "sessionId": "…", "title": "…" }` returns `{}`.

+ACP's `session/set_title` renames the same way for every client, on v1 and v2, without `sessionIndex`, and returns `{ "title": "…" }`: the title as `session/list` shows it to the client. On v1 an AIR client gets it without the archive prefix, and every other client, and every v2 client, with it.
+
 - A blank title is `-32602`. The adapter collapses whitespace and keeps the first 200 characters, trimmed, as the CLI does. An `[archived] ` prefix of the requested title is dropped: a rename never changes the archive state.
 - The title is stored as the title records of [Archive](#archive): a `custom-title` and an `agent-name` record. An archived session keeps its `[archived] ` prefix (and the title is cut to 200 characters with it), so a rename does not unarchive it.
 - A session that runs here on a CLI without the `rename_session` control request is refused with `-32600`: its CLI holds the title and would write it back.
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,16 +1,16 @@
 {
  "name": "@agentclientprotocol/claude-agent-acp",
-  "version": "0.104.0",
+  "version": "0.105.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "@agentclientprotocol/claude-agent-acp",
-      "version": "0.104.0",
+      "version": "0.105.0",
      "license": "Apache-2.0",
      "dependencies": {
        "@agentclientprotocol/sdk": "2.5.0",
-        "@anthropic-ai/claude-agent-sdk": "0.3.321",
+        "@anthropic-ai/claude-agent-sdk": "0.3.322",
        "diff": "9.0.0",
        "zod": "4.6.7"
      },
@@ -53,22 +53,22 @@
      }
    },
    "node_modules/@anthropic-ai/claude-agent-sdk": {
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+      "version": "0.3.322",
+      "resolved": "https://registry.npmjs.org/@anthropic-ai/claude-agent-sdk/-/claude-agent-sdk-0.3.322.tgz",
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      "license": "SEE LICENSE IN README.md",
      "engines": {
        "node": ">=18.14.0"
      },
      "optionalDependencies": {
-        "@anthropic-ai/claude-agent-sdk-darwin-arm64": "0.3.321",
-        "@anthropic-ai/claude-agent-sdk-darwin-x64": "0.3.321",
-        "@anthropic-ai/claude-agent-sdk-linux-arm64": "0.3.321",
-        "@anthropic-ai/claude-agent-sdk-linux-arm64-musl": "0.3.321",
-        "@anthropic-ai/claude-agent-sdk-linux-x64": "0.3.321",
-        "@anthropic-ai/claude-agent-sdk-linux-x64-musl": "0.3.321",
-        "@anthropic-ai/claude-agent-sdk-win32-arm64": "0.3.321",
-        "@anthropic-ai/claude-agent-sdk-win32-x64": "0.3.321"
+        "@anthropic-ai/claude-agent-sdk-darwin-arm64": "0.3.322",
+        "@anthropic-ai/claude-agent-sdk-darwin-x64": "0.3.322",
+        "@anthropic-ai/claude-agent-sdk-linux-arm64": "0.3.322",
+        "@anthropic-ai/claude-agent-sdk-linux-arm64-musl": "0.3.322",
+        "@anthropic-ai/claude-agent-sdk-linux-x64": "0.3.322",
+        "@anthropic-ai/claude-agent-sdk-linux-x64-musl": "0.3.322",
+        "@anthropic-ai/claude-agent-sdk-win32-arm64": "0.3.322",
+        "@anthropic-ai/claude-agent-sdk-win32-x64": "0.3.322"
      },
      "peerDependencies": {
        "@anthropic-ai/sdk": ">=0.93.0",
@@ -77,9 +77,9 @@
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+      "version": "0.3.322",
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@@ -90,9 +90,9 @@
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@@ -103,9 +103,9 @@
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@@ -119,9 +119,9 @@
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@@ -135,9 +135,9 @@
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@@ -151,9 +151,9 @@
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@@ -167,9 +167,9 @@
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@@ -180,9 +180,9 @@
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@@ -555,9 +555,9 @@
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@@ -627,9 +627,9 @@
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+      "version": "1.2.18",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-freebsd-x64/-/binding-freebsd-x64-1.2.18.tgz",
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@@ -645,9 +645,9 @@
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+      "version": "1.2.18",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-arm-gnueabihf/-/binding-linux-arm-gnueabihf-1.2.18.tgz",
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@@ -663,9 +663,9 @@
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@@ -684,9 +684,9 @@
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+      "version": "1.2.18",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-arm64-musl/-/binding-linux-arm64-musl-1.2.18.tgz",
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@@ -705,9 +705,9 @@
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+      "version": "1.2.18",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-ppc64-gnu/-/binding-linux-ppc64-gnu-1.2.18.tgz",
+      "integrity": "sha512-+AkRly5SrCEgnPhGRfub7pucASYEC2fTsxZg7VCcnozpA2+Wn/gCYy1t7LuJS67/xyJu/7noYBJncDUkbwgw2A==",
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@@ -726,9 +726,9 @@
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    "node_modules/@rolldown/binding-linux-s390x-gnu": {
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-      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-s390x-gnu/-/binding-linux-s390x-gnu-1.2.16.tgz",
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+      "version": "1.2.18",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-s390x-gnu/-/binding-linux-s390x-gnu-1.2.18.tgz",
+      "integrity": "sha512-Ttg1r9vVykMnQrE/GwYO9icKtXiuiMfRe/w74xJkeoVuvhRG+WtT6LEMOf58Yl63yd77lhHzO8Y55R8CC3XALA==",
      "cpu": [
        "s390x"
      ],
@@ -747,9 +747,9 @@
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    "node_modules/@rolldown/binding-linux-x64-gnu": {
-      "version": "1.2.16",
-      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-x64-gnu/-/binding-linux-x64-gnu-1.2.16.tgz",
-      "integrity": "sha512-TNKhgE3uJTsTzatUSSYt0Kgo+Oa2uSlSjz4r1aEIea7HX6ULBym4fAlYUhG1i6pjNf2njfCUAfKwr6C3E9Xg1w==",
+      "version": "1.2.18",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-x64-gnu/-/binding-linux-x64-gnu-1.2.18.tgz",
+      "integrity": "sha512-xX1Tt4o5jUMma0vJsXp5eRZA9nOuyigb2dKJMMzZRmzMxLYGE9PaKKSqHPzPvSQgM8ZOEacSTQwDQcwWfh0xmQ==",
      "cpu": [
        "x64"
      ],
@@ -768,9 +768,9 @@
      }
    },
    "node_modules/@rolldown/binding-linux-x64-musl": {
-      "version": "1.2.16",
-      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-x64-musl/-/binding-linux-x64-musl-1.2.16.tgz",
-      "integrity": "sha512-7chXdpjXZ8qG0+mIxECN3cT9kvhZ3/oZhMX6Pp876P7CDrIy8nJswva6Mq357JR7eYXfuskwZxMeV1SzoZdHrA==",
+      "version": "1.2.18",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-x64-musl/-/binding-linux-x64-musl-1.2.18.tgz",
+      "integrity": "sha512-4VVlGI5K2kociZlW3lSN8VjG3TW5yQIlAcfCdBXMgGjJxZll15Fa4ocRHXHvIVVnwlibCw/NQajJrNDiqqpiiw==",
      "cpu": [
        "x64"
      ],
@@ -789,9 +789,9 @@
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    },
    "node_modules/@rolldown/binding-openharmony-arm64": {
-      "version": "1.2.16",
-      "resolved": "https://registry.npmjs.org/@rolldown/binding-openharmony-arm64/-/binding-openharmony-arm64-1.2.16.tgz",
-      "integrity": "sha512-Kwjt+7uNTJK5/MDkGWGVO2KQPnj8yAV75dMpfwyHZrJSXWHrniOB0aUEWlVYf3H1hOqFLIStLdM5QXq6bnKmOQ==",
+      "version": "1.2.18",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-openharmony-arm64/-/binding-openharmony-arm64-1.2.18.tgz",
+      "integrity": "sha512-PApTsgH1jLYuyy3tSCz9De82Gq5qXwi7vImVZhEzTgX1C4150Cp5M2ZfL3pLvbCvbEHL0oJeC6pd6podtv8Y5w==",
      "cpu": [
        "arm64"
      ],
@@ -807,9 +807,9 @@
      }
    },
    "node_modules/@rolldown/binding-win32-arm64-msvc": {
-      "version": "1.2.16",
-      "resolved": "https://registry.npmjs.org/@rolldown/binding-win32-arm64-msvc/-/binding-win32-arm64-msvc-1.2.16.tgz",
-      "integrity": "sha512-/LH6WfjDRXXJz/p5xl4TmU+jpcnwcxbKEQBW/GZE0JHfN0lGIyTtsUEGaQ/q/GikkGJ2yLKe6pwm7AnEWO8pdw==",
+      "version": "1.2.18",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-win32-arm64-msvc/-/binding-win32-arm64-msvc-1.2.18.tgz",
+      "integrity": "sha512-J2XjWjx/SP+4x0H4r6dz3Vzb5WVkg7re40Do9K7HJ3sK2/xcmZrWwakXlSwaMvOkvruLJCD4CL/3wqsIR/thgg==",
      "cpu": [
        "arm64"
      ],
@@ -825,9 +825,9 @@
      }
    },
    "node_modules/@rolldown/binding-win32-x64-msvc": {
-      "version": "1.2.16",
-      "resolved": "https://registry.npmjs.org/@rolldown/binding-win32-x64-msvc/-/binding-win32-x64-msvc-1.2.16.tgz",
-      "integrity": "sha512-1lv1KvX0Z871zfk7vw+dnXMMnHNyDwMzWG8Kv3HxDXMOhzCX4SHc7HK319fInP0i+0p9D8brkfzL7pJOaGl+tw==",
+      "version": "1.2.18",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-win32-x64-msvc/-/binding-win32-x64-msvc-1.2.18.tgz",
+      "integrity": "sha512-XwRJxRQvkuEtS0hIIt29QrqPJ+JzMJSNYHJw4ae/mc6uEarfRG1ceyg4HmmWiBdL/YCb6g7N5BLbSvmRJRYZHw==",
      "cpu": [
        "x64"
      ],
@@ -1945,9 +1945,9 @@
      }
    },
    "node_modules/express-rate-limit": {
-      "version": "8.7.3",
-      "resolved": "https://registry.npmjs.org/express-rate-limit/-/express-rate-limit-8.7.3.tgz",
-      "integrity": "sha512-zPLqDI2f0gV2WmGnacLf9XSSqn4VldRyP5LCzOwx0BKH40mO6+2PCFkoSsRO2jePx87/Kf6NUF6P2QOTKXHbQA==",
+      "version": "8.7.4",
+      "resolved": "https://registry.npmjs.org/express-rate-limit/-/express-rate-limit-8.7.4.tgz",
+      "integrity": "sha512-LKBXzX700wz3zAGNNmVnjRI5mEbYkLv7UbMI4+9Xa+JPcg2UZh6AgY/2CZh9RrJjFM5ttC/N1lD+KzyFoZITCw==",
      "license": "MIT",
      "peer": true,
      "dependencies": {
@@ -2408,9 +2408,9 @@
      "license": "ISC"
    },
    "node_modules/jose": {
-      "version": "6.2.16",
-      "resolved": "https://registry.npmjs.org/jose/-/jose-6.2.16.tgz",
-      "integrity": "sha512-4LSJpbuBuPdGrONCdZUy0xnxtLf8eEz+EY0SMXdHQEBU7bgUHDVblU/JAjryv3wID9/LK7/YuwFwq+AQNfMscQ==",
+      "version": "6.2.17",
+      "resolved": "https://registry.npmjs.org/jose/-/jose-6.2.17.tgz",
+      "integrity": "sha512-wOuK9V1yujQFH5S0ZWmLcDZN7+IKh9bUCC2ZPCf2HDlol3WWHy+PPyNjEI75FXRLMp3vDKQcupP59xhVU95hcg==",
      "license": "MIT",
      "peer": true,
      "funding": {
@@ -3275,9 +3275,9 @@
      }
    },
    "node_modules/rolldown": {
-      "version": "1.2.16",
-      "resolved": "https://registry.npmjs.org/rolldown/-/rolldown-1.2.16.tgz",
-      "integrity": "sha512-bWvlMpFKiTfDKfnK7FC2MPgPeWCf/Kpwsq49ApdW+FQaBZb6O6dZ4MAPbPUjp7hYQrw/RobqCzn64BRrQecGHw==",
+      "version": "1.2.18",
+      "resolved": "https://registry.npmjs.org/rolldown/-/rolldown-1.2.18.tgz",
+      "integrity": "sha512-C1uuT3UR60SShuCaPQFAAZyefJCWZlAKB02BV3BuPE2Rs4fevRQltEKoFO2tV5W9/eJhU5RieV6vJj3euulfNQ==",
      "dev": true,
      "license": "MIT",
      "peer": true,
@@ -3292,21 +3292,21 @@
        "node": "^20.19.0 || >=22.12.0"
      },
      "optionalDependencies": {
-        "@rolldown/binding-android-arm-eabi": "1.2.16",
-        "@rolldown/binding-android-arm64": "1.2.16",
-        "@rolldown/binding-darwin-arm64": "1.2.16",
-        "@rolldown/binding-darwin-x64": "1.2.16",
-        "@rolldown/binding-freebsd-x64": "1.2.16",
-        "@rolldown/binding-linux-arm-gnueabihf": "1.2.16",
-        "@rolldown/binding-linux-arm64-gnu": "1.2.16",
-        "@rolldown/binding-linux-arm64-musl": "1.2.16",
-        "@rolldown/binding-linux-ppc64-gnu": "1.2.16",
-        "@rolldown/binding-linux-s390x-gnu": "1.2.16",
-        "@rolldown/binding-linux-x64-gnu": "1.2.16",
-        "@rolldown/binding-linux-x64-musl": "1.2.16",
-        "@rolldown/binding-openharmony-arm64": "1.2.16",
-        "@rolldown/binding-win32-arm64-msvc": "1.2.16",
-        "@rolldown/binding-win32-x64-msvc": "1.2.16"
+        "@rolldown/binding-android-arm-eabi": "1.2.18",
+        "@rolldown/binding-android-arm64": "1.2.18",
+        "@rolldown/binding-darwin-arm64": "1.2.18",
+        "@rolldown/binding-darwin-x64": "1.2.18",
+        "@rolldown/binding-freebsd-x64": "1.2.18",
+        "@rolldown/binding-linux-arm-gnueabihf": "1.2.18",
+        "@rolldown/binding-linux-arm64-gnu": "1.2.18",
+        "@rolldown/binding-linux-arm64-musl": "1.2.18",
+        "@rolldown/binding-linux-ppc64-gnu": "1.2.18",
+        "@rolldown/binding-linux-s390x-gnu": "1.2.18",
+        "@rolldown/binding-linux-x64-gnu": "1.2.18",
+        "@rolldown/binding-linux-x64-musl": "1.2.18",
+        "@rolldown/binding-openharmony-arm64": "1.2.18",
+        "@rolldown/binding-win32-arm64-msvc": "1.2.18",
+        "@rolldown/binding-win32-x64-msvc": "1.2.18"
      }
    },
    "node_modules/router": {
@@ -3699,9 +3699,9 @@
      }
    },
    "node_modules/vite": {
-      "version": "8.3.6",
-      "resolved": "https://registry.npmjs.org/vite/-/vite-8.3.6.tgz",
-      "integrity": "sha512-UI7dK29NnS54Fk+mmo7o+jI6U8Fp7hDl+X5Q1k45WH+d4dSlbLVUETGQ+hfkNgvLQGyoElPj837nZyv4MBc0VA==",
+      "version": "8.3.7",
+      "resolved": "https://registry.npmjs.org/vite/-/vite-8.3.7.tgz",
+      "integrity": "sha512-oxh0dMxrayBr33ScJvvBJ2HBQ2jc1TBrXKR2NyL/MJ9WPuX19mN2DXWUmywKdyw5RFVQBo8hmtb2FMC0LHrnng==",
      "dev": true,
      "license": "MIT",
      "peer": true,
@@ -3709,7 +3709,7 @@
        "lightningcss": "^1.33.0",
        "picomatch": "^4.0.7",
        "postcss": "^8.5.32",
-        "rolldown": "~1.2.16",
+        "rolldown": "~1.2.18",
        "tinyglobby": "^0.2.17"
      },
      "bin": {
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
  "publishConfig": {
    "access": "public"
  },
-  "version": "0.104.0",
+  "version": "0.105.0",
  "description": "An ACP-compatible coding agent powered by the Claude Agent SDK (TypeScript)",
  "main": "dist/lib.js",
  "types": "dist/lib.d.ts",
@@ -69,7 +69,7 @@
  },
  "dependencies": {
    "@agentclientprotocol/sdk": "2.5.0",
-    "@anthropic-ai/claude-agent-sdk": "0.3.321",
+    "@anthropic-ai/claude-agent-sdk": "0.3.322",
    "diff": "9.0.0",
    "zod": "4.6.7"
  },
--- a/src/acp-client.ts
+++ b/src/acp-client.ts
@@ -16,7 +16,7 @@ import type { AcpPermissionRequest } from "./permissions/presentation.js";
 * Client-facing surface the agent calls back into. This is the subset of ACP
 * client methods the agent actually uses, expressed as a narrow interface so
 * tests can supply lightweight mocks. In the v1 agent it is backed by
- * `ClientConnection` (`v1/acp-agent.ts`) over the SDK's typed `AgentContext`.
+ * `ClientConnection` (`v1/client-connection.ts`) over the SDK's typed `AgentContext`.
 * The v2 session output passes one that only takes `sessionUpdate`
 * (`v2/stream.ts`).
 */
--- a/src/auth-status-reporter.ts
+++ b/src/auth-status-reporter.ts
@@ -188,8 +188,8 @@ export class AuthStatusReporter {
  /**
   * Report the identity behind a session's `AccountInfo`.
   *
-   * `AccountInfo` is richer than the CLI probe (it is what the live query
-   * actually authenticates with). The v1 core calls it before the
+   * `AccountInfo` describes what the live query authenticates with, but lacks
+   * the CLI's plan tier. The v1 core calls it before the
   * `--hide-claude-auth` guard may refuse the session or the turn: that flag
   * blocks the *use* of a subscription, it does not make the state secret, and
   * a refusal is when the client most needs to know the account it was
@@ -225,7 +225,7 @@ export class AuthStatusReporter {
    }
    const fromSession = fromAccountInfo(account, apiKeyHelper);
    if (fromSession) {
-      this.set(fromSession);
+      this.set(mergeAuthStatus(this.current, fromSession, "session"));
    } else if (!this.loggedUninformativeAccount) {
      this.loggedUninformativeAccount = true;
      this.options.logger.log(
@@ -337,7 +337,7 @@ export class AuthStatusReporter {
    // The CLI probe can be poorer than the session `AccountInfo` for the very
    // same login (no organization, say). Keep those extra fields rather than
    // regressing the payload; a different identity replaces it wholesale.
-    const merged = mergeAuthStatus(this.current, status);
+    const merged = mergeAuthStatus(this.current, status, "cli");
    this.set(merged);
    this.options.onProbe?.(status.kind);
    return merged;
--- a/src/auth-status.ts
+++ b/src/auth-status.ts
@@ -104,8 +104,10 @@ export type AcpAuthStatus = Pick<AuthStatusResponse, "state" | "accounts">;
 * - No identity read yet (`undefined`): `unknown`, no accounts.
 * - `kind: "none"`: `unauthenticated`, no accounts.
 * - Any other kind: `authenticated`, with the identity as the one account,
- *   marked `active`. `_meta.claudeCode` carries the `kind`, `detail` and
- *   `plan` that the account fields have no place for.
+ *   marked `active`. The account has no field for `detail`, so its label
+ *   carries it in parentheses, e.g. "Anthropic API key (ANTHROPIC_API_KEY)",
+ *   for clients that show only the standard fields. `_meta.claudeCode`
+ *   carries the `kind`, `detail` and `plan` on their own.
 *
 * `--hide-claude-auth` does not change the payload: it reports the login the
 * CLI holds, also when the subscription guard refuses to use it.
@@ -117,7 +119,8 @@ export function toAcpAuthStatus(status: AuthStatus | undefined): AcpAuthStatus {
  if (status.kind === "none") {
    return { state: "unauthenticated" };
  }
-  const account: AuthAccount = { label: status.label, active: true };
+  const label = status.detail ? `${status.label} (${status.detail})` : status.label;
+  const account: AuthAccount = { label, active: true };
  if (status.account?.email) account.email = status.account.email;
  if (status.account?.organization) account.organization = status.account.organization;
  account._meta = {
@@ -141,6 +144,8 @@ export type CliAuthStatus = {
  orgId?: string;
  orgName?: string;
  subscriptionType?: string;
+  /** CLI-only tier, e.g. "max_5x" or "max_20x"; not in SDK AccountInfo. */
+  planTier?: string;
 };

 const NOT_LOGGED_IN: AuthStatus = {
@@ -267,6 +272,7 @@ export function fromCliStatus(stdout: string, apiKeyHelper?: string): AuthStatus
  return mapAuthFields({
    apiProvider: status.apiProvider,
    subscriptionType: status.subscriptionType,
+    planTier: status.planTier,
    apiKeySource: status.apiKeySource,
    email: status.email,
    organization: status.orgName,
@@ -287,6 +293,7 @@ export function fromCliStatus(stdout: string, apiKeyHelper?: string): AuthStatus
 function mapAuthFields(fields: {
  apiProvider?: string;
  subscriptionType?: string;
+  planTier?: string;
  apiKeySource?: string;
  email?: string;
  organization?: string;
@@ -326,7 +333,7 @@ function mapAuthFields(fields: {
    if (organization) account.organization = organization;
    return {
      kind: "account",
-      label: planLabel(subscriptionType),
+      label: planLabel(subscriptionType, fields.planTier),
      // No detail: the client falls back to `account.email` for line 2.
      account,
    };
@@ -334,12 +341,14 @@ function mapAuthFields(fields: {
  return notLoggedInAuthStatus();
 }

-/** Names the plan with exactly one "Claude". A newer CLI already reports
- *  "Claude Max", an older one reports "max", and both must read "Claude Max".
- *  Each word is title-cased; a word that already carries capitals is kept. */
-function planLabel(plan: string): string {
+/** Names the plan with exactly one "Claude". Without a tier, "Claude Max"
+ *  from a newer CLI and "max" from an older one both read "Claude Max".
+ *  Each word is title-cased; a word that already carries capitals is kept.
+ *  The CLI's max_20x tier identifies Ultra; other tiers keep the plan label. */
+function planLabel(plan: string, planTier?: string): string {
  const titled = plan.replace(/\S+/g, (word) => word.charAt(0).toUpperCase() + word.slice(1));
-  return /^claude(\s|$)/i.test(plan) ? titled : `Claude ${titled}`;
+  const label = /^claude(\s|$)/i.test(plan) ? titled : `Claude ${titled}`;
+  return label.toLowerCase() === "claude max" && planTier === "max_20x" ? "Claude Ultra" : label;
 }

 /**
@@ -367,8 +376,14 @@ export function sameIdentity(a: AuthStatus, b: AuthStatus): boolean {
 * organization the CLI probe omits. So when the read describes the same
 * identity, its values win field by field but the fields it lacks are kept;
 * when it describes a different identity, it replaces the old one wholesale.
+ * Session reads lack the CLI's plan tier, so keep the label for the same plan.
+ * A CLI read always replaces the label, including when its tier is absent.
 */
-export function mergeAuthStatus(previous: AuthStatus | undefined, next: AuthStatus): AuthStatus {
+export function mergeAuthStatus(
+  previous: AuthStatus | undefined,
+  next: AuthStatus,
+  source: "cli" | "session",
+): AuthStatus {
  if (!previous || !sameIdentity(previous, next)) {
    return next;
  }
@@ -379,6 +394,14 @@ export function mergeAuthStatus(previous: AuthStatus | undefined, next: AuthStat
  if (previous.account || next.account) {
    merged.account = { ...previous.account, ...next.account };
  }
+  if (
+    source === "session" &&
+    previous.account?.plan &&
+    next.account?.plan &&
+    planLabel(previous.account.plan).toLowerCase() === planLabel(next.account.plan).toLowerCase()
+  ) {
+    merged.label = previous.label;
+  }
  if (merged.vendor === undefined && previous.vendor !== undefined) {
    merged.vendor = previous.vendor;
  }
--- a/src/message-filters.ts
+++ b/src/message-filters.ts
@@ -87,6 +87,22 @@ function hasMarkerTag(text: string, tag: string): boolean {
  return markerTagText(text, tag) !== undefined;
 }

+/**
+ * Whether the content of a user message is only the output of a local
+ * command, such as the `<local-command-stdout>Set model to …</local-command-stdout>`
+ * that Claude Code echoes when the model changes.
+ */
+export function isLocalCommandOutput(content: unknown): boolean {
+  if (typeof content !== "string") return false;
+  if (
+    !hasMarkerTag(content, "local-command-stdout") &&
+    !hasMarkerTag(content, "local-command-stderr")
+  ) {
+    return false;
+  }
+  return stripMarkerTags(content).trim() === "";
+}
+
 function commandInvocationFromMarkerOnlyText(text: string): string | null {
  if (hasMarkerTag(text, "local-command-stdout") || hasMarkerTag(text, "local-command-stderr")) {
    return null;
--- a/src/paths.ts
+++ b/src/paths.ts
@@ -5,3 +5,16 @@ import * as path from "node:path";
 export function claudeConfigDir(): string {
  return process.env.CLAUDE_CONFIG_DIR ?? path.join(os.homedir(), ".claude");
 }
+
+/** `<config>/projects`, normalized like the SDK does. */
+export function projectsRoot(): string {
+  return path.join(claudeConfigDir(), "projects").normalize("NFC");
+}
+
+const SESSION_ID_PATTERN = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;
+
+/** Whether `value` is a Claude session id (a UUID). Only such ids name a
+ *  transcript, and only such ids are safe to use as a file name. */
+export function isSessionId(value: unknown): value is string {
+  return typeof value === "string" && SESSION_ID_PATTERN.test(value);
+}
--- a/src/v1/session-index/activity.ts
+++ b/src/v1/session-index/activity.ts
--- a/src/v1/session-index/archive-title.ts
+++ b/src/v1/session-index/archive-title.ts
--- a/src/v1/session-index/background-tasks.ts
+++ b/src/v1/session-index/background-tasks.ts
@@ -40,7 +40,7 @@

 import { createReadStream } from "node:fs";
 import { createInterface } from "node:readline";
-import { TASK_NOTIFICATION_TAG, taskNotificationsOf } from "../../task-notifications.js";
+import { TASK_NOTIFICATION_TAG, taskNotificationsOf } from "../task-notifications.js";

 export type BackgroundTasks = {
  /** The ids of the tasks that started and did not end, in start order. */
--- a/src/v1/session-index/dir-listing.ts
+++ b/src/v1/session-index/dir-listing.ts
--- a/src/v1/session-index/first-prompt.ts
+++ b/src/v1/session-index/first-prompt.ts
--- a/src/v1/session-index/list-subscriptions.ts
+++ b/src/v1/session-index/list-subscriptions.ts
@@ -49,7 +49,8 @@ import {
  type LiveSessionRegistry,
  type LiveSnapshot,
 } from "./live-registry.js";
-import { isExactProjectDir, isSessionId, projectDirMatches, projectsRoot } from "./project-dirs.js";
+import { isSessionId, projectsRoot } from "../paths.js";
+import { isExactProjectDir, projectDirMatches } from "./project-dirs.js";
 import { type IndexRow, type SessionIndex, type TranscriptCandidate } from "./session-index.js";
 import { changeSignature, sessionInfoOf } from "./session-info.js";

--- a/src/v1/session-index/live-registry.ts
+++ b/src/v1/session-index/live-registry.ts
@@ -23,7 +23,7 @@ import { execFile } from "node:child_process";
 import * as fs from "node:fs/promises";
 import * as os from "node:os";
 import * as path from "node:path";
-import { claudeConfigDir } from "../../paths.js";
+import { claudeConfigDir } from "../paths.js";
 import { errorCode } from "./project-dirs.js";

 const SNAPSHOT_TTL_MS = 5_000;
--- a/src/v1/session-index/project-dirs.ts
+++ b/src/v1/session-index/project-dirs.ts
@@ -14,24 +14,10 @@

 import * as fs from "node:fs/promises";
 import * as path from "node:path";
-import { claudeConfigDir } from "../../paths.js";

 /** The SDK cuts an encoded path at this length and appends a hash. */
 const MAX_SANITIZED_LENGTH = 200;

-const SESSION_ID_PATTERN = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;
-
-/** Whether `value` is a Claude session id (a UUID). Only such ids name a
- *  transcript, and only such ids are safe to use as a file name. */
-export function isSessionId(value: unknown): value is string {
-  return typeof value === "string" && SESSION_ID_PATTERN.test(value);
-}
-
-/** `<config>/projects`, normalized like the SDK does. */
-export function projectsRoot(): string {
-  return path.join(claudeConfigDir(), "projects").normalize("NFC");
-}
-
 function sanitize(value: string): string {
  return value.replace(/[^a-zA-Z0-9]/g, "-");
 }
--- a/src/session-index/rename.ts
+++ b/src/session-index/rename.ts
@@ -0,0 +1,115 @@
+/**
+ * Client renames of a session: `session/set_title` (v1 and v2) and AIR's
+ * `_session/rename` (v1). Both cores call {@link renameSession}, which stores
+ * the title in every transcript of the session (see
+ * {@link SessionIndexService.retitle}) and, for a session loaded on the
+ * connection, makes it the client title that no generated title replaces.
+ */
+
+import { RequestError } from "@agentclientprotocol/sdk/unstable";
+import type { Query } from "@anthropic-ai/claude-agent-sdk";
+import type { SessionTitles, TitledSession } from "../session-titles.js";
+import { storedTitle } from "./archive-title.js";
+import {
+  renameTo,
+  type RenameSessionRequest,
+  type RetitleOptions,
+  type SessionIndexService,
+  type TitleChange,
+} from "./service.js";
+
+/** A session loaded on the connection, and its title state. */
+export interface RetitledSession {
+  readonly session: TitledSession;
+  readonly titles: Pick<
+    SessionTitles,
+    "setExplicitTitle" | "storedTitle" | "rememberStoredTitle" | "shownTitle"
+  >;
+}
+
+type RenamingQuery = Query & {
+  renameSession?: (title: string, sessionId?: string) => Promise<void>;
+};
+
+/**
+ * Names a session; no generated title replaces it. An archived session stays
+ * archived. `loaded` is the session loaded on this connection, if any;
+ * `clientTitle` turns a stored title into the one the client shows (an AIR
+ * client's drops the archive prefix). Returns that title, which the loaded
+ * session also publishes as a `session_info_update`.
+ *
+ * A session that is not loaded and has no transcript is unknown (`-32002`).
+ */
+export async function renameSession(
+  index: SessionIndexService,
+  request: RenameSessionRequest,
+  loaded: RetitledSession | undefined,
+  clientTitle: (stored: string) => string = (stored) => stored,
+): Promise<string> {
+  const { sessionId } = request;
+  // As the CLI keeps it, and never with the archive prefix: a rename does
+  // not change the archive state.
+  const title = storedTitle(request.title, false, sessionId);
+  // The title as stored: an archived one is cut with its prefix.
+  const shown = (stored: string | undefined) => clientTitle(stored ?? title);
+  const stored = await retitleSession(index, sessionId, renameTo(title), shown, loaded, {
+    mayBeUnwritten: true,
+    sidecar: "always",
+  });
+  return shown(stored);
+}
+
+/**
+ * Retitles a session (see {@link SessionIndexService.retitle}) and returns
+ * the title stored. A session that runs here is titled through its CLI
+ * (`rename_session`). A loaded session's title state takes the change as a
+ * client title, so no generated title replaces it; `publish` is the title it
+ * then publishes.
+ */
+export async function retitleSession(
+  index: SessionIndexService,
+  sessionId: string,
+  change: TitleChange,
+  publish: Parameters<SessionTitles["setExplicitTitle"]>[0],
+  loaded: RetitledSession | undefined,
+  options: Pick<RetitleOptions, "mayBeUnwritten" | "sidecar">,
+): Promise<string | undefined> {
+  let stored: string | undefined;
+  // Decided once a title generation in flight has ended: the query may
+  // have closed meanwhile.
+  const persist = async () => {
+    const session = loaded?.session;
+    const query = session?.query as RenamingQuery | undefined;
+    // A closed session's CLI is gone here: only a running query titles it.
+    const running = session !== undefined && !session.queryClosed;
+    if (running && typeof query?.renameSession !== "function") {
+      // Its CLI holds the title and would write it back over ours.
+      throw RequestError.invalidRequest(
+        { sessionId },
+        "The Claude Code CLI of this session cannot change its title while it runs.",
+      );
+    }
+    const live = running
+      ? {
+          cwd: session.cwd,
+          rename: (title: string) => query!.renameSession!(title, sessionId),
+          stored: () => loaded!.titles.storedTitle,
+          remember: (title: string) => loaded!.titles.rememberStoredTitle(title),
+          shown: loaded!.titles.shownTitle,
+        }
+      : undefined;
+    stored = await index.retitle(sessionId, change, {
+      ...options,
+      // Without its CLI, a session needs its transcript.
+      mayBeUnwritten: live !== undefined && options.mayBeUnwritten,
+      live,
+    });
+    return stored;
+  };
+  if (loaded) {
+    await loaded.titles.setExplicitTitle(publish, persist);
+  } else {
+    await persist();
+  }
+  return stored;
+}
--- a/src/v1/session-index/service.ts
+++ b/src/v1/session-index/service.ts
@@ -18,8 +18,8 @@ import {
  type SessionInfo,
 } from "@agentclientprotocol/sdk/unstable";
 import { deleteSession as sdkDeleteSession } from "@anthropic-ai/claude-agent-sdk";
-import { airExtensionMeta } from "../../air-extension.js";
-import { sanitizeTitle } from "../../session-titles.js";
+import { airExtensionMeta } from "../air-extension.js";
+import { sanitizeTitle } from "../session-titles.js";
 import type { OwnSessionState } from "./activity.js";
 import {
  effectiveTitle,
@@ -36,11 +36,11 @@ import {
  type ListSubscriptionDeps,
 } from "./list-subscriptions.js";
 import { LiveSessionRegistry } from "./live-registry.js";
+import { isSessionId } from "../paths.js";
 import {
  canonicalPath,
  exists,
  isExactProjectDir,
-  isSessionId,
  projectDirMatches,
  sameProjectPath,
 } from "./project-dirs.js";
@@ -466,6 +466,18 @@ export type SessionIndexDeps = {
  logError: (message: string, error: unknown) => void;
 };

+/** The transcript reads and writes of the session index, without its list
+ *  or watcher: what a client without `sessionIndex` uses for
+ *  `session/set_title`, AIR's archive on delete, and delete's ordering
+ *  after them (see {@link SessionIndexService.exclusive}). */
+export function transcriptWriter(logger: {
+  error: (message: string, error: unknown) => void;
+}): SessionIndexService {
+  return new SessionIndexService({
+    logError: (message, error) => logger.error(`[session-index] ${message}:`, error),
+  });
+}
+
 export class SessionIndexService {
  readonly index: SessionIndex;
  readonly registry: LiveSessionRegistry;
@@ -541,8 +553,10 @@ export class SessionIndexService {
    };
  }

-  /** Runs `mutation` after the previous mutation of the session ended. */
-  private exclusive<T>(sessionId: string, mutation: () => Promise<T>): Promise<T> {
+  /** Runs `mutation` after the previous mutation of the session ended, such
+   *  as a delete that does not go through {@link delete}, so that a retitle
+   *  cannot append to a transcript the delete is removing. */
+  exclusive<T>(sessionId: string, mutation: () => Promise<T>): Promise<T> {
    const previous = this.mutations.get(sessionId) ?? Promise.resolve();
    const next = previous.catch(() => undefined).then(mutation);
    const settled = next.catch(() => undefined);
--- a/src/v1/session-index/session-index.ts
+++ b/src/v1/session-index/session-index.ts
@@ -21,20 +21,19 @@

 import * as fs from "node:fs/promises";
 import * as path from "node:path";
-import { sanitizeTitle } from "../../session-titles.js";
+import { sanitizeTitle } from "../session-titles.js";
 import { effectiveTitle, visibleTitle } from "./archive-title.js";
+import { isSessionId, projectsRoot } from "../paths.js";
 import {
  canonicalPath,
  encodeProjectPath,
  errorCode,
  exists,
  isExactProjectDir,
-  isSessionId,
  normalizePath,
  pathAndAncestors,
  projectDirMatches,
  projectDirsOf,
-  projectsRoot,
  sameProjectPath,
 } from "./project-dirs.js";
 import {
--- a/src/v1/session-index/session-info.ts
+++ b/src/v1/session-index/session-info.ts
@@ -5,7 +5,7 @@
 */

 import type { SessionInfo } from "@agentclientprotocol/sdk/unstable";
-import { withAirMeta } from "../../air-extension.js";
+import { withAirMeta } from "../air-extension.js";
 import { deriveActivity, selectCost, type OwnSessionState } from "./activity.js";
 import type { LiveRecord } from "./live-registry.js";
 import type { IndexRow } from "./session-index.js";
--- a/src/v1/session-index/transcript-scan.ts
+++ b/src/v1/session-index/transcript-scan.ts
--- a/src/v1/session-index/worktrees.ts
+++ b/src/v1/session-index/worktrees.ts
--- a/src/session-status.ts
+++ b/src/session-status.ts
@@ -0,0 +1,68 @@
+/**
+ * `session/status` (the unstable "Session status" RFD) of a session that the
+ * connection does not hold: `saved` or unknown. Each core answers `open`
+ * itself for the sessions it holds.
+ */
+import * as fs from "node:fs/promises";
+import * as path from "node:path";
+import { RequestError } from "@agentclientprotocol/sdk/unstable";
+import { isSessionId, projectsRoot } from "./paths.js";
+
+/** What a core advertises as `status` in its session capabilities. */
+export const SESSION_STATUS_CAPABILITY = {};
+
+/**
+ * `saved` when a project directory holds a transcript file of `sessionId`
+ * that is not empty. Its content is not read, so a transcript without a
+ * conversation is `saved` too, and its resume fails with `-32002`. Fails with
+ * `-32002` and `data.sessionId` otherwise:
+ *
+ * - an id that is not a UUID, such as a subagent's session id;
+ * - an id without a transcript: one never used, a session never prompted
+ *   (Claude Code writes the transcript at the first prompt), and a session
+ *   whose transcripts were removed.
+ *
+ * The request names no `cwd`, so a transcript of any project counts: a
+ * resume with another `cwd` can still fail with `-32002`.
+ *
+ * It lists the project directories and stats the one file name in each. No
+ * query starts and no session is loaded. A directory or file that cannot be
+ * read for another reason than being absent fails the request: it does not
+ * make the session unknown.
+ */
+export async function savedSessionStatus(sessionId: string): Promise<{ status: "saved" }> {
+  if (!isSessionId(sessionId) || !(await hasTranscript(sessionId))) {
+    throw RequestError.sessionNotFound(sessionId);
+  }
+  return { status: "saved" };
+}
+
+async function hasTranscript(sessionId: string): Promise<boolean> {
+  const root = projectsRoot();
+  let projects: string[];
+  try {
+    projects = await fs.readdir(root);
+  } catch (error) {
+    // No session was ever stored.
+    if (isAbsent(error)) return false;
+    throw error;
+  }
+  const found = await Promise.all(
+    projects.map((project) =>
+      fs.stat(path.join(root, project, `${sessionId}.jsonl`)).then(
+        (stats) => stats.isFile() && stats.size > 0,
+        (error: unknown) => {
+          // No such transcript, or `project` is a file.
+          if (isAbsent(error)) return false;
+          throw error;
+        },
+      ),
+    ),
+  );
+  return found.includes(true);
+}
+
+function isAbsent(error: unknown): boolean {
+  const code = (error as { code?: unknown }).code;
+  return code === "ENOENT" || code === "ENOTDIR";
+}
--- a/src/settings.ts
+++ b/src/settings.ts
@@ -37,6 +37,8 @@ export interface SettingsManagerOptions {
  logger?: { log: (...args: any[]) => void; error: (...args: any[]) => void };
 }

+type ModelSelectionSettings = Pick<Settings, "availableModels" | "modelOverrides">;
+
 /**
 * Manages Claude Code settings using the SDK's `resolveSettings` merge engine
 * so the values we see match what `query()` would observe.
@@ -50,6 +52,7 @@ export class SettingsManager {
  private cwd: string;
  private effective: Settings = {};
  private managedDeniedModels: string[] = [];
+  private managedModelSettings: ModelSelectionSettings = {};
  private managedApiKeyHelper?: string;
  private watchers: fs.FSWatcher[] = [];
  private onChange?: () => void;
@@ -112,6 +115,15 @@ export class SettingsManager {
      this.managedDeniedModels = resolved.sources
        .filter((entry) => entry.source === "managed")
        .flatMap((entry) => entry.settings.deniedModels ?? []);
+      this.managedModelSettings = Object.assign(
+        {},
+        ...resolved.sources
+          .filter((entry) => entry.source === "managed")
+          .map((entry) => ({
+            availableModels: entry.settings.availableModels,
+            modelOverrides: entry.settings.modelOverrides,
+          })),
+      );
      this.managedApiKeyHelper =
        resolved.provenance.apiKeyHelper?.source === "managed"
          ? resolved.effective.apiKeyHelper
@@ -120,6 +132,7 @@ export class SettingsManager {
      this.logger.error("Failed to resolve settings:", error);
      this.effective = {};
      this.managedDeniedModels = [];
+      this.managedModelSettings = {};
      this.managedApiKeyHelper = undefined;
    }
  }
@@ -193,6 +206,26 @@ export class SettingsManager {
    );
  }

+  /** Model selection settings including the inline SDK settings tier. */
+  getModelSelectionSettings(override?: Settings): ModelSelectionSettings {
+    // The SDK unions non-managed allowlists, but a managed list owns the
+    // whole allowlist. Keep that policy when adding
+    // models the SDK did not include in its initialization result.
+    const lists = [this.effective.availableModels, override?.availableModels].filter(
+      (list): list is string[] => Array.isArray(list),
+    );
+    const managed = this.managedModelSettings;
+    return {
+      availableModels:
+        managed.availableModels ?? (lists.length > 0 ? [...new Set(lists.flat())] : undefined),
+      modelOverrides: {
+        ...this.effective.modelOverrides,
+        ...override?.modelOverrides,
+        ...managed.modelOverrides,
+      },
+    };
+  }
+
  /**
   * `deniedModels` entries from the managed tier, the only tier the CLI
   * honors them from.
--- a/src/task-notifications.ts
+++ b/src/task-notifications.ts
@@ -1,7 +1,7 @@
 /**
 * The `<task-notification>` inputs that Claude Code writes to a transcript
 * when a background task stops. The replay of a session (`v1/acp-agent.ts`) and
- * the session index (`v1/session-index/background-tasks.ts`) read them here, so
+ * the session index (`session-index/background-tasks.ts`) read them here, so
 * both read the same fields.
 */

--- a/src/tests/acp-scenarios/snapshots/air/session-load-replay.jsonl
+++ b/src/tests/acp-scenarios/snapshots/air/session-load-replay.jsonl
@@ -1,4 +1,4 @@
-{"kind":"initialize","payload":{"_meta":{"jetbrains":{"air":{"capabilities":["sessionFailure","agentFileChangeReport","nativeSubagentSessions","asyncTasks","customInstructions","recommendedValue","diffPatch","planFile","backgroundSubagents"],"goal":{"actions":["set","clear"],"controlMethod":"_session/goal","version":1},"version":1}},"steering":{"supported":true}},"agentCapabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"logout":{},"status":{}},"loadSession":true,"mcpCapabilities":{"http":true,"sse":true},"promptCapabilities":{"embeddedContext":true,"image":true},"providers":{},"sessionCapabilities":{"additionalDirectories":{},"close":{},"delete":{},"fork":{},"list":{},"resume":{},"subagents":{},"systemPrompt":{"mode":{"override":{}}}}},"agentInfo":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"authMethods":[],"protocolVersion":1}}
+{"kind":"initialize","payload":{"_meta":{"jetbrains":{"air":{"capabilities":["sessionFailure","agentFileChangeReport","nativeSubagentSessions","asyncTasks","customInstructions","recommendedValue","diffPatch","planFile","backgroundSubagents"],"goal":{"actions":["set","clear"],"controlMethod":"_session/goal","version":1},"version":1}},"steering":{"supported":true}},"agentCapabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"logout":{},"status":{}},"loadSession":true,"mcpCapabilities":{"http":true,"sse":true},"promptCapabilities":{"embeddedContext":true,"image":true},"providers":{},"sessionCapabilities":{"additionalDirectories":{},"close":{},"delete":{},"fork":{},"list":{},"resume":{},"status":{},"subagents":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"agentInfo":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"authMethods":[],"protocolVersion":1}}
 {"kind":"sessionUpdate","payload":{"sessionId":"<session>","update":{"content":{"text":"Fix the bug","type":"text"},"messageId":"00000000-0000-4000-8000-00000000c001","sessionUpdate":"user_message_chunk"}}}
 {"kind":"sessionUpdate","payload":{"sessionId":"<session>","update":{"content":{"text":"Check the file.","type":"text"},"messageId":"msg_r1","sessionUpdate":"agent_thought_chunk"}}}
 {"kind":"sessionUpdate","payload":{"sessionId":"<session>","update":{"content":{"text":"I will edit it.","type":"text"},"messageId":"msg_r1","sessionUpdate":"agent_message_chunk"}}}
--- a/src/tests/acp-scenarios/snapshots/air/session-setup.jsonl
+++ b/src/tests/acp-scenarios/snapshots/air/session-setup.jsonl
@@ -1,3 +1,3 @@
-{"kind":"initialize","payload":{"_meta":{"jetbrains":{"air":{"capabilities":["sessionFailure","agentFileChangeReport","nativeSubagentSessions","asyncTasks","customInstructions","recommendedValue","diffPatch","planFile","backgroundSubagents"],"goal":{"actions":["set","clear"],"controlMethod":"_session/goal","version":1},"version":1}},"steering":{"supported":true}},"agentCapabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"logout":{},"status":{}},"loadSession":true,"mcpCapabilities":{"http":true,"sse":true},"promptCapabilities":{"embeddedContext":true,"image":true},"providers":{},"sessionCapabilities":{"additionalDirectories":{},"close":{},"delete":{},"fork":{},"list":{},"resume":{},"subagents":{},"systemPrompt":{"mode":{"override":{}}}}},"agentInfo":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"authMethods":[],"protocolVersion":1}}
+{"kind":"initialize","payload":{"_meta":{"jetbrains":{"air":{"capabilities":["sessionFailure","agentFileChangeReport","nativeSubagentSessions","asyncTasks","customInstructions","recommendedValue","diffPatch","planFile","backgroundSubagents"],"goal":{"actions":["set","clear"],"controlMethod":"_session/goal","version":1},"version":1}},"steering":{"supported":true}},"agentCapabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"logout":{},"status":{}},"loadSession":true,"mcpCapabilities":{"http":true,"sse":true},"promptCapabilities":{"embeddedContext":true,"image":true},"providers":{},"sessionCapabilities":{"additionalDirectories":{},"close":{},"delete":{},"fork":{},"list":{},"resume":{},"status":{},"subagents":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"agentInfo":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"authMethods":[],"protocolVersion":1}}
 {"kind":"newSession","payload":{"configOptions":[{"category":"mode","currentValue":"auto","description":"Session permission mode","id":"mode","name":"Mode","options":[{"_meta":{"jetbrains":{"air":{"kind":"standard","version":1}}},"description":"Always ask before making changes","name":"Manual","value":"default"},{"_meta":{"jetbrains":{"air":{"kind":"standard","version":1}}},"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"_meta":{"jetbrains":{"air":{"kind":"plan","version":1}}},"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"_meta":{"jetbrains":{"air":{"kind":"auto_review","version":1}}},"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"_meta":{"jetbrains":{"air":{"kind":"full_access","version":1}}},"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","id":"model","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"modes":{"availableModes":[{"_meta":{"jetbrains":{"air":{"kind":"standard","version":1}}},"description":"Always ask before making changes","id":"default","name":"Manual"},{"_meta":{"jetbrains":{"air":{"kind":"standard","version":1}}},"description":"Automatically accept all file edits","id":"acceptEdits","name":"Accept edits"},{"_meta":{"jetbrains":{"air":{"kind":"plan","version":1}}},"description":"Create a plan before making changes","id":"plan","name":"Plan"},{"_meta":{"jetbrains":{"air":{"kind":"auto_review","version":1}}},"description":"Claude handles permission decisions","id":"auto","name":"Auto"},{"_meta":{"jetbrains":{"air":{"kind":"full_access","version":1}}},"description":"Accepts all permissions","id":"bypassPermissions","name":"Bypass permissions"}],"currentModeId":"auto"},"sessionId":"<session>"}}
 {"kind":"sessionUpdate","payload":{"sessionId":"<session>","update":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]"},"name":"mcp"}],"sessionUpdate":"available_commands_update"}}}
--- a/src/tests/acp-scenarios/snapshots/v2/ask-user-question.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/ask-user-question.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/async-task-ends-before-tool-id.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/async-task-ends-before-tool-id.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/async-task-held-until-tool-id.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/async-task-held-until-tool-id.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/async-task-released-at-turn-end.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/async-task-released-at-turn-end.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/bash-background.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/bash-background.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/bash-error.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/bash-error.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/bash-foreground.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/bash-foreground.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/compaction-failed-legacy.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/compaction-failed-legacy.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/compaction-legacy.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/compaction-legacy.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/compaction-update.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/compaction-update.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/edit-rejected.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/edit-rejected.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/edit-with-permission.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/edit-with-permission.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/exit-plan-approve.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/exit-plan-approve.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/exit-plan-reject.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/exit-plan-reject.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/goal.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/goal.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"/goal Ship the feature","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/grep-and-glob.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/grep-and-glob.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/mcp-tool.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/mcp-tool.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/memory-recall.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/memory-recall.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/network-permission.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/network-permission.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/notebook-edit.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/notebook-edit.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/permission-denied.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/permission-denied.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/rate-limit-and-origin.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/rate-limit-and-origin.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/read.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/read.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/session-load-replay.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/session-load-replay.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[],"messageId":"00000000-0000-4000-8000-00000000c001","sessionUpdate":"user_message"}}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":{"text":"Fix the bug","type":"text"},"messageId":"00000000-0000-4000-8000-00000000c001","sessionUpdate":"user_message_chunk"}}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[],"messageId":"msg_r1","sessionUpdate":"agent_thought"}}}
--- a/src/tests/acp-scenarios/snapshots/v2/session-setup.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/session-setup.jsonl
@@ -1,2 +1,2 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/skill.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/skill.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/subagent-agent-async.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/subagent-agent-async.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/subagent-late-child-update.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/subagent-late-child-update.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/subagent-native-sessions.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/subagent-native-sessions.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/subagent-nested.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/subagent-nested.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/subagent-task-legacy.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/subagent-task-legacy.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/subagent-transcript-extension.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/subagent-transcript-extension.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/task-create-update.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/task-create-update.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/task-output-and-stop.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/task-output-and-stop.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/text-and-thinking.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/text-and-thinking.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/todo-write.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/todo-write.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/tool-progress.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/tool-progress.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/web-fetch-and-search.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/web-fetch-and-search.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/write-existing.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/write-existing.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/snapshots/v2/write-new.jsonl
+++ b/src/tests/acp-scenarios/snapshots/v2/write-new.jsonl
@@ -1,4 +1,4 @@
-{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"systemPrompt":{"mode":{"override":{}}}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
+{"kind":"response","method":"initialize","payload":{"authMethods":[],"capabilities":{"_meta":{"authStatus":{},"claudeCode":{"promptQueueing":true}},"auth":{"status":{}},"providers":{},"session":{"additionalDirectories":{},"delete":{},"fork":{},"mcp":{"http":{},"stdio":{}},"prompt":{"embeddedContext":{},"image":{}},"status":{},"systemPrompt":{"mode":{"override":{}}},"title":{}}},"info":{"name":"@agentclientprotocol/claude-agent-acp","title":"Claude Agent","version":"<version>"},"protocolVersion":2}}
 {"kind":"response","method":"session/new","payload":{"availableCommands":[{"description":"Show the MCP servers and their status, or reconnect, enable, or disable a server","input":{"hint":"[reconnect|enable|disable [<server>|all]]","type":"text"},"name":"mcp","type":"command"}],"configOptions":[{"category":"mode","configId":"mode","currentValue":"auto","description":"Session permission mode","name":"Mode","options":[{"description":"Always ask before making changes","name":"Manual","value":"default"},{"description":"Automatically accept all file edits","name":"Accept edits","value":"acceptEdits"},{"description":"Create a plan before making changes","name":"Plan","value":"plan"},{"description":"Claude handles permission decisions","name":"Auto","value":"auto"},{"description":"Accepts all permissions","name":"Bypass permissions","value":"bypassPermissions"}],"type":"select"},{"category":"model","configId":"model","currentValue":"claude-sonnet-4-6","description":"AI model to use","name":"Model","options":[{"description":"Fast","name":"Claude Sonnet 4.6","value":"claude-sonnet-4-6"}],"type":"select"}],"sessionId":"<session>"}}
 {"kind":"notification","method":"session/update","payload":{"sessionId":"<session>","update":{"content":[{"text":"prompt 1","type":"text"}],"messageId":"<id-1>","sessionUpdate":"user_message"}}}
 {"kind":"response","method":"session/prompt","payload":{"messageId":"<id-1>"}}
--- a/src/tests/acp-scenarios/compare.ts
+++ b/src/tests/acp-scenarios/compare.ts
@@ -28,6 +28,12 @@
 * - The `initialize` response also advertises `agentCapabilities.auth.status`,
 *   which origin/main did not: the agent now answers `auth/status` and sends
 *   `auth/status_update`.
+ * - The `initialize` response also advertises
+ *   `agentCapabilities.sessionCapabilities.status`, which origin/main did
+ *   not: the agent now serves `session/status`.
+ * - The `initialize` response also advertises
+ *   `agentCapabilities.sessionCapabilities.title`, which origin/main did not:
+ *   the agent now serves `session/set_title`.
 * - A SandboxNetworkAccess tool call is settled by a `tool_call_update` with
 *   only its final `status` once its permission request is answered. The
 *   callback runs nothing, so origin/main never settled the call (see
@@ -229,19 +235,17 @@ function isMeta(key: string): boolean {
  return key.startsWith("_meta.");
 }

-/** `record` without the session capability `key`, when it is an `initialize` response. */
-function withoutSessionCapability(record: Recorded, key: string): Recorded {
+/** `record` without the session capabilities `keys`, when it is an `initialize` response. */
+function withoutSessionCapabilities(record: Recorded, keys: readonly string[]): Recorded {
  if (record.kind !== "initialize") return record;
  const payload = record.payload as Json;
  const agent = payload.agentCapabilities as Json | undefined;
  const session = agent?.sessionCapabilities as Json | undefined;
-  if (!session || !(key in session)) return record;
+  if (!session || !keys.some((key) => key in session)) return record;
+  const remaining = keys.reduce((rest, key) => without(rest, key), session);
  return {
    ...record,
-    payload: {
-      ...payload,
-      agentCapabilities: { ...agent, sessionCapabilities: without(session, key) },
-    },
+    payload: { ...payload, agentCapabilities: { ...agent, sessionCapabilities: remaining } },
  } as Recorded;
 }

@@ -264,14 +268,18 @@ function withoutAuthStatusCapability(record: Recorded): Recorded {
 */
 export function compareWithBaseline(baseline: Recorded[], traffic: Recorded[]): string[] {
  const expected = baseline
-    .map((record) => withoutSessionCapability(withoutAirOnlyKeys(record) as Recorded, "subagents"))
+    .map((record) =>
+      withoutSessionCapabilities(withoutAirOnlyKeys(record) as Recorded, ["subagents"]),
+    )
    .filter((record) => {
      const update = updateOf(record);
      return !(update?.sessionUpdate === "session_info_update" && Object.keys(update).length === 1);
    });
  const current = withoutSandboxNetworkSettlements(
    traffic.map((record) =>
-      withoutAuthStatusCapability(withoutSessionCapability(record, "systemPrompt")),
+      withoutAuthStatusCapability(
+        withoutSessionCapabilities(record, ["systemPrompt", "status", "title"]),
+      ),
    ),
  );
  const violations: string[] = [];
--- a/src/tests/model-selection-settings.test.ts
+++ b/src/tests/model-selection-settings.test.ts
@@ -0,0 +1,92 @@
+import { describe, it, expect, afterEach, vi } from "vitest";
+import { resolveSettings } from "@anthropic-ai/claude-agent-sdk";
+import { SettingsManager } from "../settings.js";
+
+vi.mock("@anthropic-ai/claude-agent-sdk", async (importOriginal) => ({
+  ...(await importOriginal<typeof import("@anthropic-ai/claude-agent-sdk")>()),
+  resolveSettings: vi.fn(),
+}));
+
+describe("model selection settings policy", () => {
+  let manager: SettingsManager;
+  afterEach(() => manager?.dispose());
+
+  it.each([{ availableModels: ["claude-haiku-4-5"] }, { availableModels: [] }])(
+    "keeps the managed allowlist %j and mappings above inline settings",
+    async ({ availableModels }) => {
+      const managed = {
+        availableModels,
+        modelOverrides: { "claude-haiku-4-5": "managed-haiku" },
+        deniedModels: ["claude-opus-5"],
+      };
+      vi.mocked(resolveSettings).mockResolvedValue({
+        effective: managed,
+        provenance: {},
+        sources: [{ source: "managed", settings: managed }],
+      });
+      manager = new SettingsManager(process.cwd());
+      await manager.initialize();
+      expect(
+        manager.getModelSelectionSettings({
+          availableModels: ["claude-opus-5"],
+          modelOverrides: { "claude-haiku-4-5": "inline-haiku" },
+        }),
+      ).toEqual({
+        availableModels: managed.availableModels,
+        modelOverrides: managed.modelOverrides,
+      });
+      expect(manager.getManagedDeniedModels()).toEqual(managed.deniedModels);
+    },
+  );
+
+  it("keeps managed override keys above inline keys without discarding other inline mappings", async () => {
+    const managed = { modelOverrides: { "claude-haiku-4-5": "managed-haiku" } };
+    vi.mocked(resolveSettings).mockResolvedValue({
+      effective: managed,
+      provenance: {},
+      sources: [{ source: "managed", settings: managed }],
+    });
+    manager = new SettingsManager(process.cwd());
+    await manager.initialize();
+    expect(
+      manager.getModelSelectionSettings({
+        availableModels: ["claude-haiku-4-5", "claude-sonnet-4-6"],
+        modelOverrides: {
+          "claude-haiku-4-5": "inline-haiku",
+          "claude-sonnet-4-6": "inline-sonnet",
+        },
+      }),
+    ).toEqual({
+      availableModels: ["claude-haiku-4-5", "claude-sonnet-4-6"],
+      modelOverrides: { "claude-haiku-4-5": "managed-haiku", "claude-sonnet-4-6": "inline-sonnet" },
+    });
+  });
+
+  it("preserves file and inline mappings when the managed allowlist supplies no mappings", async () => {
+    vi.mocked(resolveSettings).mockResolvedValue({
+      effective: {
+        availableModels: ["claude-haiku-4-5"],
+        modelOverrides: { "claude-haiku-4-5": "file-haiku" },
+      },
+      provenance: {},
+      sources: [
+        { source: "user", settings: { modelOverrides: { "claude-haiku-4-5": "file-haiku" } } },
+        { source: "managed", settings: { availableModels: ["claude-haiku-4-5"] } },
+      ],
+    });
+    manager = new SettingsManager(process.cwd());
+    await manager.initialize();
+    expect(manager.getModelSelectionSettings()).toEqual({
+      availableModels: ["claude-haiku-4-5"],
+      modelOverrides: { "claude-haiku-4-5": "file-haiku" },
+    });
+    expect(
+      manager.getModelSelectionSettings({
+        modelOverrides: { "claude-haiku-4-5": "inline-haiku" },
+      }),
+    ).toEqual({
+      availableModels: ["claude-haiku-4-5"],
+      modelOverrides: { "claude-haiku-4-5": "inline-haiku" },
+    });
+  });
+});
--- a/src/tests/v1/session-index-units.test.ts
+++ b/src/tests/v1/session-index-units.test.ts
@@ -2,28 +2,28 @@ import { describe, expect, it } from "vitest";
 import * as fs from "node:fs/promises";
 import * as os from "node:os";
 import * as path from "node:path";
-import { deriveActivity, selectCost, type ActivityState } from "../../v1/session-index/activity.js";
-import { LiveSessionRegistry, type LiveRecord } from "../../v1/session-index/live-registry.js";
+import { deriveActivity, selectCost, type ActivityState } from "../session-index/activity.js";
+import { LiveSessionRegistry, type LiveRecord } from "../session-index/live-registry.js";
+import { isSessionId } from "../paths.js";
 import {
  encodeProjectPath,
-  isSessionId,
  pathAndAncestors,
  projectDirMatches,
-} from "../../v1/session-index/project-dirs.js";
+} from "../session-index/project-dirs.js";
 import {
  decodeListCursor,
  encodeListCursor,
  parseListOptions,
  parseRenameSessionRequest,
  type ListScope,
-} from "../../v1/session-index/service.js";
+} from "../session-index/service.js";
 import {
  effectiveTitle,
  isArchivedTitle,
  storedTitle,
  titleRecords,
  visibleTitle,
-} from "../../v1/session-index/archive-title.js";
+} from "../session-index/archive-title.js";
 import {
  agentWorktreeOf,
  continuedInSessionId,
@@ -33,11 +33,11 @@ import {
  sdkTitles,
  transcriptAgentName,
  type TranscriptFacts,
-} from "../../v1/session-index/transcript-scan.js";
-import { firstPrompt } from "../../v1/session-index/first-prompt.js";
-import { DirListings, statFiles } from "../../v1/session-index/dir-listing.js";
-import { SessionIndex, type IndexRow } from "../../v1/session-index/session-index.js";
-import { changeSignature, sessionInfoOf } from "../../v1/session-index/session-info.js";
+} from "../session-index/transcript-scan.js";
+import { firstPrompt } from "../session-index/first-prompt.js";
+import { DirListings, statFiles } from "../session-index/dir-listing.js";
+import { SessionIndex, type IndexRow } from "../session-index/session-index.js";
+import { changeSignature, sessionInfoOf } from "../session-index/session-info.js";

 const SESSION = "11111111-1111-4111-8111-111111111111";
 const lines = (...entries: object[]) => entries.map((entry) => JSON.stringify(entry)).join("\n");
--- a/src/tests/v1/acp-agent-settings.test.ts
+++ b/src/tests/v1/acp-agent-settings.test.ts
@@ -921,6 +921,136 @@ describe("ClaudeAcpAgent settings", () => {
      return { setModelSpy };
    }

+    it.each(["environment", "caller object", "caller file"])(
+      "includes configured models omitted by the SDK from %s settings",
+      async (source) => {
+        const configured = {
+          availableModels: ["claude-haiku-4-5", "claude-haiku-5-5"],
+          modelOverrides: {
+            "claude-haiku-4-5": "global.anthropic.claude-haiku-4-5-20251001-v1:0",
+            "claude-haiku-5-5": "global.anthropic.claude-haiku-5-5",
+          },
+        };
+        let settings: object | string | undefined;
+        if (source === "environment") {
+          vi.stubEnv("CLAUDE_MODEL_CONFIG", JSON.stringify(configured));
+        } else if (source === "caller file") {
+          settings = "caller-settings.json";
+          await fs.promises.writeFile(path.join(tempDir, settings), JSON.stringify(configured));
+        } else {
+          settings = configured;
+        }
+        const { setModelSpy } = mockQueryWithModels([
+          { value: "default", displayName: "Default", description: "" },
+          { value: "sonnet", displayName: "Sonnet", description: "" },
+        ]);
+        const { ClaudeAcpAgent } = await import("../../v1/acp-agent.js");
+        const agent = new ClaudeAcpAgent(createMockClient());
+        try {
+          const response = await (agent as any).createSession({
+            cwd: tempDir,
+            mcpServers: [],
+            _meta: { claudeCode: { options: { settings } } },
+          });
+          expect(querySpy.mock.calls[0][0].options.settings).toEqual(configured);
+          const ids = ["default", ...Object.values(configured.modelOverrides)];
+          expect(
+            agent.sessions[response.sessionId].models.availableModels.map(
+              (model: any) => model.modelId,
+            ),
+          ).toEqual(ids);
+          const modelOption = response.configOptions.find((option: any) => option.id === "model");
+          expect(modelOption.options.map((option: any) => option.value)).toEqual(ids);
+          await agent.setSessionConfigOption({
+            sessionId: response.sessionId,
+            configId: "model",
+            value: ids[2],
+          });
+          expect(setModelSpy).toHaveBeenLastCalledWith(ids[2]);
+          expect(agent.sessions[response.sessionId].modelInfos.map((model) => model.value)).toEqual(
+            ids,
+          );
+        } finally {
+          await agent.dispose();
+          vi.unstubAllEnvs();
+        }
+      },
+    );
+
+    it("merges file settings with caller settings after caller keys replace the env config", async () => {
+      await fs.promises.writeFile(
+        path.join(tempDir, "settings.json"),
+        JSON.stringify({
+          availableModels: ["claude-sonnet-4-6", "claude-haiku-4-5"],
+          modelOverrides: {
+            "claude-sonnet-4-6": "file-sonnet",
+            "claude-haiku-4-5": "file-haiku",
+          },
+        }),
+      );
+      vi.stubEnv(
+        "CLAUDE_MODEL_CONFIG",
+        JSON.stringify({
+          availableModels: ["claude-opus-4-6"],
+          modelOverrides: { "claude-sonnet-4-6": "env-sonnet", "claude-haiku-4-5": "env-haiku" },
+        }),
+      );
+      mockQueryWithModels([{ value: "default", displayName: "Default", description: "" }]);
+      const { ClaudeAcpAgent } = await import("../../v1/acp-agent.js");
+      const agent = new ClaudeAcpAgent(createMockClient());
+      const settings = {
+        availableModels: ["claude-haiku-4-5", "claude-haiku-5-5"],
+        modelOverrides: { "claude-haiku-4-5": "caller-haiku" },
+      };
+      try {
+        const response = await (agent as any).createSession({
+          cwd: tempDir,
+          mcpServers: [],
+          _meta: { claudeCode: { options: { settings } } },
+        });
+        expect(querySpy.mock.calls[0][0].options.settings).toEqual(settings);
+        const modelOption = response.configOptions.find((option: any) => option.id === "model");
+        expect(modelOption.options.map((option: any) => option.value)).toEqual([
+          "default",
+          "file-sonnet",
+          "caller-haiku",
+          "claude-haiku-5-5",
+        ]);
+      } finally {
+        await agent.dispose();
+        vi.unstubAllEnvs();
+      }
+    });
+
+    it.each([[], undefined])(
+      "preserves empty and absent configured allowlists: %j",
+      async (availableModels) => {
+        vi.stubEnv(
+          "CLAUDE_MODEL_CONFIG",
+          JSON.stringify({
+            availableModels,
+            modelOverrides: { "claude-haiku-4-5": "provider-haiku" },
+          }),
+        );
+        mockQueryWithModels([
+          { value: "default", displayName: "Default", description: "" },
+          { value: "sonnet", displayName: "Sonnet", description: "" },
+        ]);
+        const { ClaudeAcpAgent } = await import("../../v1/acp-agent.js");
+        const agent = new ClaudeAcpAgent(createMockClient());
+        try {
+          const response = await (agent as any).createSession({ cwd: tempDir, mcpServers: [] });
+          const modelOption = response.configOptions.find((option: any) => option.id === "model");
+          expect(modelOption.options.map((option: any) => option.value)).toEqual(
+            availableModels ? ["default"] : ["default", "sonnet"],
+          );
+        } finally {
+          await agent.dispose();
+          vi.unstubAllEnvs();
+        }
+      },
+    );
+
    it("restricts configOptions to the user's allowlist using their exact IDs", async () => {
      // Reproduces the scenario from
      // https://github.com/agentclientprotocol/claude-agent-acp/issues/620:
--- a/src/tests/v1/acp-agent.test.ts
+++ b/src/tests/v1/acp-agent.test.ts
@@ -77,7 +77,7 @@ import {
  type SDKControlGetUsageResponse,
 } from "@anthropic-ai/claude-agent-sdk";
 import { createHash, randomUUID } from "crypto";
-import { mkdir, mkdtemp, readFile, rm, writeFile } from "node:fs/promises";
+import { chmod, mkdir, mkdtemp, readFile, rm, writeFile } from "node:fs/promises";
 import os from "node:os";
 import path from "node:path";
 import {
@@ -14953,6 +14953,79 @@ describe("session/fork", () => {
  });
 });

+describe("session/status", () => {
+  it("answers open for the sessions it holds, and the others from their stored transcripts", async () => {
+    const configDir = await mkdtemp(path.join(os.tmpdir(), "session-status-"));
+    vi.stubEnv("CLAUDE_CONFIG_DIR", configDir);
+    try {
+      const agent = new ClaudeAcpAgent({ sessionUpdate: async () => {} } as unknown as AcpClient, {
+        log: () => {},
+        error: () => {},
+      });
+      const { agentCapabilities } = await agent.initialize({
+        protocolVersion: 1,
+        clientCapabilities: {},
+      });
+      expect(agentCapabilities?.sessionCapabilities?.status).toEqual({});
+      const status = (sessionId: string) => agent.sessionStatus({ sessionId });
+      const unknown = (sessionId: string) => ({ code: -32002, data: { sessionId } });
+
+      const sessionId = randomUUID();
+      agent.sessions[sessionId] = {} as ClaudeAcpAgent["sessions"][string];
+      await expect(status(sessionId)).resolves.toEqual({ status: "open" });
+      // A held session whose query ended stays open: a load returns it as it is.
+      agent.sessions[sessionId]!.queryClosed = true;
+      await expect(status(sessionId)).resolves.toEqual({ status: "open" });
+      // A subagent's session id, and a name that every object inherits.
+      await expect(status("agent-1")).rejects.toMatchObject(unknown("agent-1"));
+      await expect(status("constructor")).rejects.toMatchObject(unknown("constructor"));
+
+      // Closed, and never prompted: no projects directory exists yet.
+      delete agent.sessions[sessionId];
+      await expect(status(sessionId)).rejects.toMatchObject(unknown(sessionId));
+      // A transcript of any project counts, next to a project without one.
+      await mkdir(path.join(configDir, "projects", "-other"), { recursive: true });
+      const project = path.join(configDir, "projects", "-project");
+      // A directory of that name is no transcript.
+      await mkdir(path.join(project, `${sessionId}.jsonl`), { recursive: true });
+      await expect(status(sessionId)).rejects.toMatchObject(unknown(sessionId));
+      await rm(path.join(project, `${sessionId}.jsonl`), { recursive: true });
+      await writeFile(path.join(project, `${sessionId}.jsonl`), "{}\n");
+      await expect(status(sessionId)).resolves.toEqual({ status: "saved" });
+      // The request loaded nothing.
+      expect(agent.sessions[sessionId]).toBeUndefined();
+    } finally {
+      vi.unstubAllEnvs();
+      await rm(configDir, { recursive: true, force: true });
+    }
+  });
+
+  // Not on Windows, where `chmod` does not take the read permission away.
+  it.skipIf(process.platform === "win32" || process.getuid?.() === 0)(
+    "fails, not -32002, when a project directory cannot be read",
+    async () => {
+      const configDir = await mkdtemp(path.join(os.tmpdir(), "session-status-"));
+      vi.stubEnv("CLAUDE_CONFIG_DIR", configDir);
+      const project = path.join(configDir, "projects", "-project");
+      await mkdir(project, { recursive: true });
+      await chmod(project, 0o000);
+      try {
+        const agent = new ClaudeAcpAgent(
+          { sessionUpdate: async () => {} } as unknown as AcpClient,
+          { log: () => {}, error: () => {} },
+        );
+        await expect(agent.sessionStatus({ sessionId: randomUUID() })).rejects.toMatchObject({
+          code: "EACCES",
+        });
+      } finally {
+        await chmod(project, 0o700);
+        vi.unstubAllEnvs();
+        await rm(configDir, { recursive: true, force: true });
+      }
+    },
+  );
+});
+
 describe("session/close", () => {
  function createMockAgent() {
    const mockClient = {
--- a/src/tests/v1/auth-status.test.ts
+++ b/src/tests/v1/auth-status.test.ts
@@ -220,7 +220,7 @@ describe("auth status mappers", () => {
        state: "authenticated",
        accounts: [
          {
-            label: "Anthropic API key",
+            label: "Anthropic API key (env)",
            active: true,
            _meta: { claudeCode: { kind: "api_key", detail: "env" } },
          },
@@ -363,6 +363,48 @@ describe("auth status mappers", () => {
    ).toEqual({ kind: "account", label: "Claude subscription", detail: "OAuth token" });
  });

+  it.each([
+    ["max", "max_20x", "Claude Ultra"],
+    ["Claude Max", "max_20x", "Claude Ultra"],
+    ["max", "max_5x", "Claude Max"],
+    ["max", "max_other", "Claude Max"],
+    ["max", undefined, "Claude Max"],
+    ["max", "future_tier", "Claude Max"],
+    ["max", null, "Claude Max"],
+    ["max", 20, "Claude Max"],
+    ["max", { tier: "max_20x" }, "Claude Max"],
+    ["max", ["max_20x"], "Claude Max"],
+    ["pro", "max_20x", "Claude Pro"],
+    ["Future Plan", "future_tier", "Claude Future Plan"],
+  ])("labels CLI plan %j with tier %j as %j", (subscriptionType, planTier, label) => {
+    expect(
+      fromCliStatus(
+        JSON.stringify({
+          ...JSON.parse(CLI_SUBSCRIPTION),
+          subscriptionType,
+          planTier,
+        }),
+      ),
+    ).toEqual({
+      kind: "account",
+      label,
+      account: { plan: subscriptionType, email: "user@example.com", organization: "ACME" },
+    });
+  });
+
+  it.each([
+    [{ apiKeySource: "env" }, { kind: "api_key", label: "Anthropic API key", detail: "env" }],
+    [{ apiProvider: "bedrock" }, { kind: "external", label: "AWS Bedrock" }],
+    [{ apiProvider: "gateway" }, { kind: "gateway", label: "Custom model gateway" }],
+    [{ loggedIn: false }, { kind: "none", label: "Not logged in" }],
+  ])("does not let a subscription tier override auth fields %j", (fields, expected) => {
+    expect(
+      fromCliStatus(
+        JSON.stringify({ ...JSON.parse(CLI_SUBSCRIPTION), planTier: "max_20x", ...fields }),
+      ),
+    ).toEqual(expected);
+  });
+
  it("lets a third-party backend outrank the logged-out flag", () => {
    // `loggedIn` tracks the claude.ai login only; on Bedrock the credentials
    // are external and the agent is authenticated all the same.
@@ -384,19 +426,27 @@ describe("auth status mappers", () => {
    };
    // Same login, read from a source without the organization: it survives.
    expect(
-      mergeAuthStatus(stored, {
-        kind: "account",
-        label: "Claude Max",
-        account: { plan: "max", email: "user@example.com" },
-      }),
+      mergeAuthStatus(
+        stored,
+        {
+          kind: "account",
+          label: "Claude Max",
+          account: { plan: "max", email: "user@example.com" },
+        },
+        "cli",
+      ),
    ).toEqual(stored);
    // A different login replaces everything, organization included.
    expect(
-      mergeAuthStatus(stored, {
-        kind: "account",
-        label: "Claude Pro",
-        account: { plan: "pro", email: "other@example.com" },
-      }),
+      mergeAuthStatus(
+        stored,
+        {
+          kind: "account",
+          label: "Claude Pro",
+          account: { plan: "pro", email: "other@example.com" },
+        },
+        "cli",
+      ),
    ).toEqual({
      kind: "account",
      label: "Claude Pro",
@@ -404,7 +454,11 @@ describe("auth status mappers", () => {
    });
    // A different kind never merges, even when it looks adjacent.
    expect(
-      mergeAuthStatus(stored, { kind: "api_key", label: "Anthropic API key", detail: "env" }),
+      mergeAuthStatus(
+        stored,
+        { kind: "api_key", label: "Anthropic API key", detail: "env" },
+        "cli",
+      ),
    ).toEqual({ kind: "api_key", label: "Anthropic API key", detail: "env" });
    // Key sources identify api_key payloads.
    expect(
@@ -414,6 +468,29 @@ describe("auth status mappers", () => {
      ),
    ).toBe(false);
  });
+
+  it.each<["cli" | "session", string, string, string | undefined, string]>([
+    ["session", "max", "user@example.com", undefined, "Claude Ultra"],
+    ["session", "Claude Max", "user@example.com", undefined, "Claude Ultra"],
+    ["session", "pro", "user@example.com", undefined, "Claude Pro"],
+    ["session", "max", "other@example.com", undefined, "Claude Max"],
+    ["cli", "max", "user@example.com", "max_5x", "Claude Max"],
+    ["cli", "max", "user@example.com", undefined, "Claude Max"],
+    ["cli", "max", "user@example.com", "future_tier", "Claude Max"],
+  ])(
+    "merges a %s read of %s for %s with tier %s as %s",
+    (source, subscriptionType, email, planTier, label) => {
+      const previous = fromCliStatus(
+        JSON.stringify({ ...JSON.parse(CLI_SUBSCRIPTION), planTier: "max_20x" }),
+      );
+      const fields = { apiProvider: "firstParty" as const, subscriptionType, email };
+      const next =
+        source === "session"
+          ? fromAccountInfo(fields)
+          : fromCliStatus(JSON.stringify({ ...fields, loggedIn: true, planTier }));
+      expect(mergeAuthStatus(previous, next!, source).label).toBe(label);
+    },
+  );
 });

 describe("auth status over ACP", () => {
@@ -765,7 +842,7 @@ describe("auth status over ACP", () => {
      state: "authenticated",
      accounts: [
        {
-          label: "Custom model gateway",
+          label: "Custom model gateway (gw.example.com)",
          active: true,
          _meta: { claudeCode: { kind: "gateway", detail: "gw.example.com" } },
        },
@@ -783,7 +860,7 @@ describe("auth status over ACP", () => {
    agent.setAuthStatus({ kind: "api_key", label: "Anthropic API key", detail: "env" });
    expect(await agent.authStatusResponse()).toMatchObject({
      state: "authenticated",
-      accounts: [{ label: "Anthropic API key" }],
+      accounts: [{ label: "Anthropic API key (env)" }],
    });
  });

@@ -859,6 +936,32 @@ describe("auth status over ACP", () => {
    });
  });

+  it.each(["max_5x", undefined, "future_tier"])(
+    "keeps Ultra across session reads and refreshes the label for CLI tier %j",
+    async (planTier) => {
+      statusStdout = JSON.stringify({ ...JSON.parse(CLI_SUBSCRIPTION), planTier: "max_20x" });
+      await initialize();
+      const sessionId = await scriptedSession({
+        apiProvider: "firstParty",
+        subscriptionType: "Claude Max",
+        email: "user@example.com",
+      });
+      await promptOnce(sessionId);
+      expect(updates().every((call) => call[1].authStatus.label === "Claude Ultra")).toBe(true);
+      expect(await agent.authStatusResponse()).toMatchObject({
+        accounts: [{ label: "Claude Ultra", _meta: { claudeCode: { plan: "max" } } }],
+      });
+      await settle();
+
+      statusStdout = JSON.stringify({ ...JSON.parse(CLI_SUBSCRIPTION), planTier });
+      await promptOnce(sessionId);
+      expect(lastPush()?.label).toBe("Claude Max");
+      expect(authStatusUpdate.mock.calls.at(-1)?.[0]).toMatchObject({
+        accounts: [{ label: "Claude Max" }],
+      });
+    },
+  );
+
  it("lets a probe of a different identity replace the stored one wholesale", async () => {
    const sessionId = await scriptedSession({
      apiProvider: "firstParty",
--- a/src/tests/v1/background-tasks.test.ts
+++ b/src/tests/v1/background-tasks.test.ts
@@ -11,11 +11,11 @@ import * as fsSync from "node:fs";
 import * as os from "node:os";
 import * as path from "node:path";
 import type { SessionInfo } from "@agentclientprotocol/sdk/unstable";
-import type { ActivityState } from "../../v1/session-index/activity.js";
-import { endedTaskId, searchBackgroundTasks } from "../../v1/session-index/background-tasks.js";
-import { encodeProjectPath } from "../../v1/session-index/project-dirs.js";
-import { SessionIndex } from "../../v1/session-index/session-index.js";
-import { SessionIndexService } from "../../v1/session-index/service.js";
+import type { ActivityState } from "../../session-index/activity.js";
+import { endedTaskId, searchBackgroundTasks } from "../../session-index/background-tasks.js";
+import { encodeProjectPath } from "../../session-index/project-dirs.js";
+import { SessionIndex } from "../../session-index/session-index.js";
+import { SessionIndexService } from "../../session-index/service.js";

 let configDir: string;
 let workspace: string;
--- a/src/tests/v1/fork-session.test.ts
+++ b/src/tests/v1/fork-session.test.ts
@@ -6,7 +6,7 @@ import * as path from "node:path";
 import * as os from "node:os";
 import { messageIdForGrouping } from "../../sdk-to-acp.js";
 import { forkSession } from "../../fork-session.js";
-import { encodeProjectPath } from "../../v1/session-index/project-dirs.js";
+import { encodeProjectPath } from "../../session-index/project-dirs.js";

 // Use the real SDK against temporary transcripts, without starting Claude Code.
 let root: string;
--- a/src/tests/v1/session-index.test.ts
+++ b/src/tests/v1/session-index.test.ts
@@ -23,7 +23,7 @@ import {
  type InitializeResponse,
  type SessionInfo,
 } from "@agentclientprotocol/sdk/unstable";
-import { encodeProjectPath } from "../../v1/session-index/project-dirs.js";
+import { encodeProjectPath } from "../../session-index/project-dirs.js";
 import {
  archiveInsteadOfDelete,
  archiveTo,
@@ -31,16 +31,16 @@ import {
  parseBatchGetSessionsRequest,
  SessionIndexService,
  writeCustomTitleSidecar,
-} from "../../v1/session-index/service.js";
-import { scanTranscriptFile } from "../../v1/session-index/transcript-scan.js";
-import { repositoryWorktrees } from "../../v1/session-index/worktrees.js";
+} from "../../session-index/service.js";
+import { scanTranscriptFile } from "../../session-index/transcript-scan.js";
+import { repositoryWorktrees } from "../../session-index/worktrees.js";
 import {
  ListSubscriptions,
  MAX_SUBSCRIPTIONS,
  parseListSubscribeRequest,
  parseListUnsubscribeRequest,
  type ListChanges,
-} from "../../v1/session-index/list-subscriptions.js";
+} from "../../session-index/list-subscriptions.js";
 import { SessionTitles } from "../../session-titles.js";
 import { initializeClient } from "../helpers.js";
 import {
@@ -1350,6 +1350,48 @@ describe("_session/rename", () => {
  });
 });

+describe("session/set_title", () => {
+  it("titles a stored session for a client without the session index", async () => {
+    const session = await writeTranscript({});
+    const { agent } = createAgent();
+    await initializeClient(agent, {});
+    expect(
+      await agent.setSessionTitle({ sessionId: session.id, title: "  Investigate\n OAuth  " }),
+    ).toEqual({ title: "Investigate OAuth" });
+    expect(await lastRecords(session.file)).toEqual(titleRecords(session.id, "Investigate OAuth"));
+    const page = await agent.listSessions({ cwd: workspace });
+    expect(page.sessions[0]!.title).toBe("Investigate OAuth");
+  });
+
+  it.each([
+    ["an AIR client with sessionIndex", air("sessionIndex"), "Renamed"],
+    ["an AIR client without sessionIndex", air(), "Renamed"],
+    ["a client that is not AIR", {}, "[archived] Renamed"],
+  ])(
+    "keeps an archived session archived and answers the title %s shows",
+    async (_client, capabilities, shown) => {
+      const session = await writeTranscript({ trailer: titleRecords("", "[archived] Fix it") });
+      const { agent } = createAgent();
+      await initializeClient(agent, capabilities);
+      expect(await agent.setSessionTitle({ sessionId: session.id, title: "Renamed" })).toEqual({
+        title: shown,
+      });
+      expect(await lastRecords(session.file)).toEqual(
+        titleRecords(session.id, "[archived] Renamed"),
+      );
+    },
+  );
+
+  it.each([
+    ["an unknown session", () => ({ sessionId: randomUUID(), title: "x" }), -32002],
+    ["an empty title", () => ({ sessionId: randomUUID(), title: " \n " }), -32602],
+  ])("refuses %s", async (_case, params, code) => {
+    const { agent } = createAgent();
+    await initializeClient(agent, {});
+    await expect(agent.setSessionTitle(params())).rejects.toMatchObject({ code });
+  });
+});
+
 describe("_session/archive and _session/unarchive", () => {
  it("append AIR's archive title records, are idempotent and keep updatedAt", async () => {
    const session = await writeTranscript({ prompt: "Fix  the\nparser" });
@@ -1854,7 +1896,7 @@ describe("_session/list/subscribe", () => {
  });

  it("clears the failed turn of a session that runs here when a new turn starts", async () => {
-    const { noteSessionState } = await import("../../v1/session-index/connection.js");
+    const { noteSessionState } = await import("../../v1/session-index.js");
    const session = { lastTurnFailed: true } as any;
    noteSessionState(session, "idle", "running");
    expect(session.lastTurnFailed).toBe(false);
--- a/src/tests/v2/acp-v2.test.ts
+++ b/src/tests/v2/acp-v2.test.ts
@@ -5,7 +5,7 @@
 * schema, so a malformed v2 message fails the test.
 */
 import { randomUUID } from "node:crypto";
-import { appendFile, mkdir, mkdtemp, rm, writeFile } from "node:fs/promises";
+import { appendFile, mkdir, mkdtemp, readFile, rm, writeFile } from "node:fs/promises";
 import * as os from "node:os";
 import * as path from "node:path";
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
@@ -35,6 +35,7 @@ import {
  v1SetSessionConfigOptionRequest,
  v2ConfigOptions,
 } from "../../v2/session-requests.js";
+import { encodeProjectPath } from "../../session-index/project-dirs.js";
 import { startupFailure } from "../helpers.js";
 import packageJson from "../../../package.json" with { type: "json" };

@@ -108,6 +109,8 @@ const sdk = vi.hoisted(() => ({
  accountInfo: async (): Promise<Record<string, unknown>> => ({}),
  /** The query switches its model (`setModel`). */
  setModel: async (_model?: string): Promise<void> => {},
+  /** Claude Code stores a session title (`rename_session`). */
+  renameSession: async (_title: string, _sessionId?: string): Promise<void> => {},
  /** Set to serve Remote Control, as a query of a CLI that supports it does. */
  enableRemoteControl: undefined as
    ((enabled: boolean, name?: string) => Promise<{ session_url?: string }>) | undefined,
@@ -142,6 +145,7 @@ vi.mock("@anthropic-ai/claude-agent-sdk", async () => {
        accountInfo: () => sdk.accountInfo(),
        setMcpServers: (servers: Record<string, unknown>) => sdk.setMcpServers(servers),
        setModel: (model?: string) => sdk.setModel(model),
+        renameSession: (title: string, sessionId?: string) => sdk.renameSession(title, sessionId),
        ...(sdk.enableRemoteControl ? { enableRemoteControl: sdk.enableRemoteControl } : {}),
      });
      return Object.assign(messages, controls);
@@ -394,6 +398,8 @@ describe("ACP protocol routing", () => {
      fork: {},
      additionalDirectories: {},
      systemPrompt: { mode: { override: {} } },
+      status: {},
+      title: {},
    });
    expect(response.capabilities?.providers).toEqual({});
    // Not `_session/steering`, which v1 advertises in the top-level `_meta`.
@@ -747,6 +753,236 @@ describe("ACP v2 sessions", () => {
    });
  });

+  describe("session/status", () => {
+    /** Stores a transcript of `sessionId`, as Claude Code does at the first prompt. */
+    async function storeTranscript(sessionId: string, content = "{}\n") {
+      const project = path.join(tempDir, "claude", "projects", "-project");
+      await mkdir(project, { recursive: true });
+      await writeFile(path.join(project, `${sessionId}.jsonl`), content);
+    }
+    const status = (agent: v2.ClientContext, sessionId: string) =>
+      agent.request(v2.methods.agent.session.status, { sessionId });
+    const unknown = (sessionId: string) => ({ code: -32002, data: { sessionId } });
+
+    it("answers from memory and the stored transcript, and starts or sends nothing", async () => {
+      const client = v2Client();
+      await client.app.connectWith(connectRouter(), async (agent) => {
+        await initializeV2(agent);
+        const neverUsed = randomUUID();
+        await expect(status(agent, neverUsed)).rejects.toMatchObject(unknown(neverUsed));
+        // Not a UUID: no file is looked up under such a name.
+        await expect(status(agent, "../settings")).rejects.toMatchObject(unknown("../settings"));
+
+        const { sessionId } = await agent.request(v2.methods.agent.session.new, { cwd });
+        await client.authUpdate(1);
+        // The agent's post-setup work runs on a timer.
+        await new Promise((resolve) => setTimeout(resolve, 20));
+        const sent = client.sessionUpdates.length;
+        // The state as a `state_update` snapshot holds it, with the session's list.
+        expect(await status(agent, sessionId)).toEqual({
+          status: "open",
+          state: { state: "idle", background: [] },
+        });
+
+        await agent.request(v2.methods.agent.session.close, { sessionId });
+        // Claude Code writes the transcript at the first prompt: none is stored.
+        await expect(status(agent, sessionId)).rejects.toMatchObject(unknown(sessionId));
+        // An empty transcript holds no conversation to resume.
+        await storeTranscript(sessionId, "");
+        await expect(status(agent, sessionId)).rejects.toMatchObject(unknown(sessionId));
+        await storeTranscript(sessionId);
+        expect(await status(agent, sessionId)).toEqual({ status: "saved" });
+
+        expect(sdk.queryOptions).toHaveLength(1);
+        expect(client.sessionUpdates).toHaveLength(sent);
+      });
+    });
+
+    it("answers a session whose query ended without session/close from its transcript", async () => {
+      // Claude Code exits right after it started.
+      sdk.run = async function* () {};
+      const client = v2Client();
+      await client.app.connectWith(connectRouter(), async (agent) => {
+        await initializeV2(agent);
+        const { sessionId } = await agent.request(v2.methods.agent.session.new, { cwd });
+        await vi.waitFor(() => expect(v2Session(sessionId)).toBeUndefined());
+
+        await expect(status(agent, sessionId)).rejects.toMatchObject(unknown(sessionId));
+        await storeTranscript(sessionId);
+        expect(await status(agent, sessionId)).toEqual({ status: "saved" });
+        await client.authUpdate(1);
+      });
+    });
+
+    it("answers saved while a resume still starts the session, without waiting for it", async () => {
+      const sessionId = randomUUID();
+      await storeTranscript(sessionId);
+      let started!: () => void;
+      const starting = new Promise<void>((resolve) => {
+        started = resolve;
+      });
+      const initialization = sdk.initializationResult;
+      sdk.initializationResult = async () => {
+        await starting;
+        return initialization();
+      };
+      const client = v2Client();
+      await client.app.connectWith(connectRouter(), async (agent) => {
+        await initializeV2(agent);
+        const resumed = agent.request(v2.methods.agent.session.resume, { sessionId, cwd });
+        await vi.waitFor(() => expect(sdk.queryOptions).toHaveLength(1));
+
+        expect(await status(agent, sessionId)).toEqual({ status: "saved" });
+
+        started();
+        await resumed;
+        expect(await status(agent, sessionId)).toMatchObject({ status: "open" });
+        await client.authUpdate(1);
+      });
+    });
+
+    it("reports a session that waits for a permission as requires_action", async () => {
+      let answer!: (response: v2.RequestPermissionResponse) => void;
+      scriptTurns(async function* (options) {
+        await options.canUseTool!("Bash", { command: "ls" }, {
+          signal: new AbortController().signal,
+          suggestions: [],
+          toolUseID: "toolu_ls",
+          requestId: randomUUID(),
+        } as Parameters<NonNullable<Options["canUseTool"]>>[2]);
+        yield result(options);
+        yield idleState(options);
+      });
+      const client = v2Client({
+        answerPermission: (() =>
+          new Promise<v2.RequestPermissionResponse>((resolve) => {
+            answer = resolve;
+          })) as unknown as () => v2.RequestPermissionResponse,
+      });
+      await client.app.connectWith(connectRouter(), async (agent) => {
+        await initializeV2(agent);
+        const { sessionId } = await agent.request(v2.methods.agent.session.new, { cwd });
+        await agent.request(v2.methods.agent.session.prompt, { sessionId, prompt: text("go") });
+        await vi.waitFor(() => expect(client.permissionRequests).toHaveLength(1));
+        await vi.waitFor(() =>
+          expect(turnTrace(client.sessionUpdates).at(-1)).toBe("requires_action"),
+        );
+
+        expect(await agent.request(v2.methods.agent.session.status, { sessionId })).toEqual({
+          status: "open",
+          state: { state: "requires_action", background: [] },
+        });
+
+        answer({ outcome: { outcome: "selected", optionId: "allow-once" } });
+        await vi.waitFor(() => expect(turnTrace(client.sessionUpdates).at(-1)).toMatch(/^idle/));
+        await client.authUpdate(1);
+      });
+      // The status request added no state to the turn's.
+      expect(turnTrace(client.sessionUpdates)).toEqual([
+        "user_message",
+        "running",
+        "requires_action",
+        "running",
+        "idle end_turn",
+      ]);
+    });
+  });
+
+  describe("session/set_title", () => {
+    it("titles an active session through Claude Code and publishes the stored title", async () => {
+      const renameSession = vi.fn(sdkDefaults.renameSession);
+      sdk.renameSession = renameSession;
+      const client = v2Client();
+      await client.app.connectWith(connectRouter(), async (agent) => {
+        await initializeV2(agent);
+        const { sessionId } = await agent.request(v2.methods.agent.session.new, { cwd });
+        client.sessionUpdates.length = 0;
+        const response = await agent.request(v2.methods.agent.session.setTitle, {
+          sessionId,
+          title: "  Investigate\n OAuth   timeout ",
+        });
+        expect(response).toEqual({ title: "Investigate OAuth timeout" });
+        expect(renameSession).toHaveBeenCalledWith("Investigate OAuth timeout", sessionId);
+        expect(client.sessionUpdates).toEqual([
+          {
+            sessionId,
+            update: { sessionUpdate: "session_info_update", title: "Investigate OAuth timeout" },
+          },
+        ]);
+        await client.authUpdate(1);
+      });
+    });
+
+    it("titles the query that a resume started while the rename ran", async () => {
+      let release!: () => void;
+      const renameSession = vi.fn(async (_title: string, _sessionId?: string) => {
+        if (renameSession.mock.calls.length === 1) {
+          await new Promise<void>((resolve) => (release = resolve));
+        }
+      });
+      sdk.renameSession = renameSession;
+      const client = v2Client();
+      await client.app.connectWith(connectRouter(), async (agent) => {
+        await initializeV2(agent);
+        const { sessionId } = await agent.request(v2.methods.agent.session.new, { cwd });
+        const renamed = agent.request(v2.methods.agent.session.setTitle, {
+          sessionId,
+          title: "Mine",
+        });
+        await vi.waitFor(() => expect(renameSession).toHaveBeenCalledTimes(1));
+        await agent.request(v2.methods.agent.session.close, { sessionId });
+        await agent.request(v2.methods.agent.session.resume, { sessionId, cwd });
+        release();
+        expect(await renamed).toEqual({ title: "Mine" });
+        expect(renameSession.mock.calls).toEqual([
+          ["Mine", sessionId],
+          ["Mine", sessionId],
+        ]);
+        await client.authUpdate(1);
+      });
+    });
+
+    it("titles a stored session that is not active in its transcript", async () => {
+      const sessionId = randomUUID();
+      const dir = path.join(tempDir, "claude", "projects", encodeProjectPath(cwd));
+      await mkdir(dir, { recursive: true });
+      const file = path.join(dir, `${sessionId}.jsonl`);
+      const prompt = { type: "user", sessionId, cwd, message: { role: "user", content: "hi" } };
+      await writeFile(file, JSON.stringify(prompt) + "\n");
+      const { app, authUpdate } = v2Client();
+      await app.connectWith(connectRouter(), async (agent) => {
+        await initializeV2(agent);
+        expect(
+          await agent.request(v2.methods.agent.session.setTitle, { sessionId, title: "Stored" }),
+        ).toEqual({ title: "Stored" });
+        await authUpdate(1);
+      });
+      const records = (await readFile(file, "utf8"))
+        .trim()
+        .split("\n")
+        .slice(-2)
+        .map((line) => JSON.parse(line));
+      expect(records).toEqual([
+        { type: "custom-title", customTitle: "Stored", sessionId },
+        { type: "agent-name", agentName: "Stored", sessionId },
+      ]);
+    });
+
+    it.each([
+      ["an unknown session", { sessionId: randomUUID(), title: "Title" }, -32002],
+      ["a title that is empty once normalized", { sessionId: randomUUID(), title: " \n " }, -32602],
+    ])("refuses %s", async (_case, params, code) => {
+      const { app, authUpdate } = v2Client();
+      await app.connectWith(connectRouter(), async (agent) => {
+        await initializeV2(agent);
+        await expect(
+          agent.request(v2.methods.agent.session.setTitle, params),
+        ).rejects.toMatchObject({ code });
+        await authUpdate(1);
+      });
+    });
+  });
+
  it("offers a resumed Fable 5.2 session's model as `fable`, as a new session lists it", async () => {
    // On resume, the CLI lists the transcript's Fable row under its id, with no `fable` row.
    const row = (value: string, resolvedModel: string, displayName: string) => ({
@@ -5677,6 +5913,57 @@ describe("ACP v2 requests that subagents make", () => {
      ]);
    });

+    it("refuses session/status of a subagent's session, which does not advertise it", async () => {
+      let finish!: () => void;
+      const finished = new Promise<void>((resolve) => {
+        finish = resolve;
+      });
+      scriptTurns(async function* (options) {
+        yield toolUseMessage(options, "toolu_agent-1", "Agent", {
+          description: "Explore the project",
+          prompt: "Look around",
+          subagent_type: "Explore",
+        });
+        yield taskStarted(options, "agent-1", { prompt: "Look around" });
+        await finished;
+        yield taskNotification(options, "agent-1", {});
+        yield result(options);
+        yield idleState(options);
+      });
+      const client = v2Client();
+      await client.app.connectWith(connectRouter(), async (agent) => {
+        await initializeV2(agent);
+        const { sessionId } = await agent.request(v2.methods.agent.session.new, { cwd });
+        await agent.request(v2.methods.agent.session.prompt, { sessionId, prompt: text("hi") });
+        await vi.waitFor(() =>
+          expect(
+            client.sessionUpdates.some(
+              (notification) =>
+                notification.sessionId === "agent-1" &&
+                notification.update.sessionUpdate === "state_update",
+            ),
+          ).toBe(true),
+        );
+
+        await expect(
+          agent.request(v2.methods.agent.session.status, { sessionId: "agent-1" }),
+        ).rejects.toMatchObject({
+          code: -32602,
+          message: expect.stringContaining("agent-1 is a subagent session"),
+        });
+
+        finish();
+        await vi.waitFor(() =>
+          expect(
+            client
+              .updates("state_update")
+              .some((update) => (update as { state: string }).state === "idle"),
+          ).toBe(true),
+        );
+        await client.authUpdate(1);
+      });
+    });
+
    it("sends a live child's configuration again after a replay's response, when the replay sent another", async () => {
      scriptTurns(async function* (options) {
        yield toolUseMessage(options, "toolu_agent-1", "Agent", {
@@ -9379,6 +9666,48 @@ describe("ACP v2 auth", () => {
    expect(acpAuthUpdates).toEqual([status]);
  });

+  it.each(["max_5x", undefined, "future_tier"])(
+    "keeps Ultra across session reads and refreshes the label for CLI tier %j",
+    async (nextTier) => {
+      let planTier: string | undefined = "max_20x";
+      execFileSpy.mockImplementation((...invocation: unknown[]) => {
+        const callback = invocation[invocation.length - 1] as (...a: unknown[]) => void;
+        callback(null, {
+          stdout: JSON.stringify({ ...JSON.parse(CLI_SUBSCRIPTION), planTier }),
+          stderr: "",
+        });
+      });
+      const account = {
+        apiProvider: "firstParty",
+        subscriptionType: "Claude Max",
+        email: "user@example.com",
+      };
+      const initializationResult = sdk.initializationResult;
+      sdk.initializationResult = async () => ({ ...(await initializationResult()), account });
+      sdk.accountInfo = async () => account;
+      const { app, authUpdate, acpAuthUpdates } = v2Client();
+      await app.connectWith(connectRouter(), async (agent) => {
+        await initializeV2(agent);
+        expect((await authUpdate(1)).authStatus.label).toBe("Claude Ultra");
+        await agent.request(v2.methods.agent.session.new, { cwd });
+        expect(await agent.request(v2.methods.agent.auth.status, {})).toMatchObject({
+          accounts: [{ label: "Claude Ultra" }],
+        });
+        expect(
+          acpAuthUpdates.every((update) => update.accounts?.[0].label === "Claude Ultra"),
+        ).toBe(true);
+
+        planTier = nextTier;
+        await agent.request(v2.methods.agent.auth.status, {});
+        await vi.waitFor(() =>
+          expect(acpAuthUpdates.at(-1)).toMatchObject({
+            accounts: [{ label: "Claude Max", _meta: { claudeCode: { plan: "max" } } }],
+          }),
+        );
+      });
+    },
+  );
+
  /**
   * In a remote environment with --hide-claude-auth, initialize offers the
   * console login as a terminal method and hides the TUI subscription login.
--- a/src/tests/v2/v2.test.ts
+++ b/src/tests/v2/v2.test.ts
@@ -9,7 +9,7 @@
 * `session_state_changed`.
 */
 import { randomUUID } from "node:crypto";
-import { mkdtemp, realpath, rm } from "node:fs/promises";
+import { mkdtemp, realpath, rm, writeFile } from "node:fs/promises";
 import * as os from "node:os";
 import * as path from "node:path";
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
@@ -495,6 +495,51 @@ describe("ACP v2 core", () => {
    );
  });

+  it.each(["environment", "caller object", "caller file"])(
+    "includes configured models omitted by the SDK from %s settings",
+    async (source) => {
+      const configured = {
+        availableModels: ["claude-haiku-4-5", "claude-haiku-5-5"],
+        modelOverrides: {
+          "claude-haiku-4-5": "global.anthropic.claude-haiku-4-5-20251001-v1:0",
+          "claude-haiku-5-5": "global.anthropic.claude-haiku-5-5",
+        },
+      };
+      let settings: typeof configured | string | undefined;
+      if (source === "environment") {
+        vi.stubEnv("CLAUDE_MODEL_CONFIG", JSON.stringify(configured));
+      } else if (source === "caller file") {
+        settings = "caller-settings.json";
+        await writeFile(path.join(cwd, settings), JSON.stringify(configured));
+      } else {
+        settings = configured;
+      }
+      const client = v2Client();
+      await client.connect(async (agent) => {
+        await agent.request(v2.methods.agent.initialize, {
+          protocolVersion: v2.PROTOCOL_VERSION,
+          info: { name: "v2-test-client", version: "1" },
+        });
+        const response = await agent.request(v2.methods.agent.session.new, {
+          cwd,
+          _meta: { claudeCode: { options: { settings } } },
+        });
+        const ids = ["default", ...Object.values(configured.modelOverrides)];
+        const model = response.configOptions?.find((option) => option.configId === "model");
+        expect(model).toMatchObject({
+          options: ids.map((value) => expect.objectContaining({ value })),
+        });
+        await agent.request(v2.methods.agent.session.setConfigOption, {
+          sessionId: response.sessionId,
+          configId: "model",
+          type: "id",
+          value: ids[2],
+        } as v2.SetSessionConfigOptionRequest);
+        expect(sdk.processes[0].setModel).toHaveBeenLastCalledWith(ids[2]);
+      });
+    },
+  );
+
  it("routes the sessions started after a gateway login through the gateway", async () => {
    const client = v2Client();
    const baseUrl = "https://gateway.example.com";
@@ -1012,6 +1057,30 @@ describe("ACP v2 core", () => {
    });
  });

+  it("stays idle at the echo of a model change's local command output", async () => {
+    const client = v2Client();
+    await client.connect(async (agent) => {
+      const { claude } = await openSession(agent);
+      // As the bundled CLI sends it after `setModel`, with no turn: no
+      // `command_lifecycle` frame, result or `session_state_changed` follows.
+      claude.send({
+        type: "user",
+        message: {
+          role: "user",
+          content:
+            "<local-command-stdout>Set model to `haiku (claude-haiku-5-5)`</local-command-stdout>",
+        },
+        parent_tool_use_id: null,
+        uuid: randomUUID(),
+        session_id: "session",
+        timestamp: new Date().toISOString(),
+        isReplay: true,
+      });
+      await new Promise((resolve) => setTimeout(resolve, 20));
+      expect(client.states()).toEqual([]);
+    });
+  });
+
  it("forwards the result of a local command, which streamed no text", async () => {
    const client = v2Client();
    await client.connect(async (agent) => {
@@ -2119,6 +2188,44 @@ describe("ACP v2 core", () => {
    });
  });

+  it.each([
+    ["a notice when the turn goes on to end", { result: "" }, "end_turn", 1],
+    ["a notice once when the result repeats its text", {}, "end_turn", 1],
+    ["the idle's error when the turn fails", { is_error: true }, "error", 0],
+  ])(
+    "reports Claude Code's message for a failed API request as %s, not as Claude's text",
+    async (_, fields, stopReason, notices) => {
+      const text = "API Error: Connection lost mid-response. The response above may be incomplete.";
+      const client = v2Client();
+      await client.connect(async (agent) => {
+        const { claude } = await openSession(agent);
+        claude.send(cycleStart());
+        claude.send({
+          ...assistant("msg_api_error", [{ type: "text", text }]),
+          message: {
+            id: "msg_api_error",
+            type: "message",
+            role: "assistant",
+            model: "<synthetic>",
+            content: [{ type: "text", text }],
+            usage: {},
+          },
+          error: "server_error",
+        });
+        claude.send(result({ result: text, ...fields }));
+        await vi.waitFor(() => expect(client.states()).toEqual(["running", "idle"]));
+      });
+
+      expect(
+        client.sessionUpdates.filter((update) => update.sessionUpdate === "agent_message_chunk"),
+      ).toEqual([]);
+      expect(client.sessionUpdates.filter((update) => update.sessionUpdate === "notice")).toEqual(
+        Array(notices).fill({ sessionUpdate: "notice", severity: "error", title: text }),
+      );
+      expect(client.sessionUpdates.at(-1)).toMatchObject({ state: "idle", stopReason });
+    },
+  );
+
  it.each([
    [
      "an error at the turn limit",
--- a/src/v1/acp-agent.ts
+++ b/src/v1/acp-agent.ts
@@ -1,15 +1,12 @@
 import {
  agent as acpAgent,
  AgentApp,
-  AgentContext,
  AuthenticateRequest,
  AuthMethod,
  AuthStatusResponse,
-  AuthStatusUpdateNotification,
  AvailableCommand,
  CancelNotification,
  ClientCapabilities,
-  CompleteElicitationNotification,
  CreateElicitationRequest,
  CreateElicitationResponse,
  DisableProviderRequest,
@@ -36,7 +33,6 @@ import {
  RequestError,
  SetProviderRequest,
  SetProviderResponse,
-  RequestPermissionRequest,
  RequestPermissionResponse,
  ResumeSessionRequest,
  ResumeSessionResponse,
@@ -47,9 +43,13 @@ import {
  SetSessionConfigOptionResponse,
  SetSessionModeRequest,
  SetSessionModeResponse,
+  SessionStatusRequest,
+  SessionStatusResponse,
  CloseSessionRequest,
  CloseSessionResponse,
  DeleteSessionRequest,
+  SetSessionTitleRequest,
+  SetSessionTitleResponse,
  DeleteSessionResponse,
  WriteTextFileRequest,
  WriteTextFileResponse,
@@ -95,6 +95,7 @@ import {
 } from "./goal-extension.js";
 import { checklistPlanUpdate, resetPlanUpdates, type SubagentChecklists } from "../plans.js";
 import { PromptSuggestions } from "../prompt-suggestions.js";
+import { savedSessionStatus, SESSION_STATUS_CAPABILITY } from "../session-status.js";
 import { sanitizeTitle, SessionTitles } from "../session-titles.js";
 import {
  AIR_NATIVE_SUBAGENT_SESSIONS_CAPABILITY,
@@ -134,16 +135,16 @@ import {
  clientSupportsAirCapability,
  withAirMeta,
 } from "../air-extension.js";
-import * as sessionIndex from "./session-index/connection.js";
+import * as sessionIndex from "./session-index.js";
 import type {
  BatchGetSessionsRequest,
  RenameSessionRequest,
  SessionIdRequest,
-} from "./session-index/service.js";
+} from "../session-index/service.js";
 import type {
  ListSubscribeRequest,
  ListUnsubscribeRequest,
-} from "./session-index/list-subscriptions.js";
+} from "../session-index/list-subscriptions.js";
 import {
  AsyncTaskRuntime,
  backgroundBashTaskFromToolResult,
@@ -305,7 +306,7 @@ import {
 } from "../session-usage.js";
 import { previewPatchContent } from "../diff.js";
 import { backgroundedBashToolCall, withRunningTerminal } from "../tool-calls/background.js";
-import { ChangedMetaFilter } from "./tool-calls/changed-meta-filter.js";
+import { ChangedMetaClient, ClientConnection } from "./client-connection.js";
 import { ToolCallFieldTracker } from "../tool-calls/field-tracker.js";
 import { ClientCapabilities as ToolCallClientCapabilities } from "../tool-calls/client-capabilities.js";
 import {
@@ -1751,116 +1752,6 @@ const LIMIT_FAILURE_CATEGORY = {
  error_max_structured_output_retries: "provider_error",
 } as const satisfies Record<string, ClaudeFailureKind>;

-/**
- * Bridges {@link AcpClient} to the connection-scoped {@link AgentContext}
- * exposed by `AgentApp.connect(...)` as `connection.client`. The peer handle is
- * valid for the entire connection lifetime, so it is captured once at
- * construction.
- */
-class ClientConnection implements AcpClient {
-  constructor(private readonly ctx: AgentContext) {}
-
-  sessionUpdate(params: AcpSessionNotification): Promise<void> {
-    return this.ctx.notify(methods.client.session.update, asSdkSessionNotification(params));
-  }
-
-  requestPermission(
-    params: RequestPermissionRequest,
-    signal?: AbortSignal,
-  ): Promise<RequestPermissionResponse> {
-    return this.ctx.request(methods.client.session.requestPermission, params, {
-      cancellationSignal: signal,
-      stopWaitingOnCancel: true,
-    });
-  }
-
-  readTextFile(params: ReadTextFileRequest): Promise<ReadTextFileResponse> {
-    return this.ctx.request(methods.client.fs.readTextFile, params);
-  }
-
-  writeTextFile(params: WriteTextFileRequest): Promise<WriteTextFileResponse> {
-    return this.ctx.request(methods.client.fs.writeTextFile, params);
-  }
-
-  createElicitation(
-    params: CreateElicitationRequest,
-    signal?: AbortSignal,
-  ): Promise<CreateElicitationResponse> {
-    return this.ctx.request(methods.client.elicitation.create, params, {
-      cancellationSignal: signal,
-      stopWaitingOnCancel: true,
-    });
-  }
-
-  completeElicitation(params: CompleteElicitationNotification): Promise<void> {
-    return this.ctx.notify(methods.client.elicitation.complete, params);
-  }
-
-  authStatusUpdate(params: AuthStatusUpdateNotification): Promise<void> {
-    return this.ctx.notify(methods.client.auth.statusUpdate, params);
-  }
-
-  extNotification(method: string, params: Record<string, unknown>): Promise<void> {
-    return this.ctx.notify(method, params);
-  }
-}
-
-/**
- * The client that the agent talks to. For an AIR client, every session update
- * passes the {@link ChangedMetaFilter} last, after the native subagent routing,
- * so a `tool_call_update` carries only the `_meta` keys that changed. ACP
- * merges only the top-level tool call fields, not the `_meta` keys. So another
- * client gets the full `_meta` on each update.
- */
-class ChangedMetaClient implements AcpClient {
-  private readonly filter = new ChangedMetaFilter();
-
-  constructor(
-    private readonly inner: AcpClient,
-    private readonly airClient: () => boolean,
-  ) {}
-
-  async sessionUpdate(params: AcpSessionNotification): Promise<void> {
-    if (!this.airClient()) return this.inner.sessionUpdate(params);
-    const update = this.filter.apply(params.update as SessionNotification["update"]);
-    if (update) await this.inner.sessionUpdate({ ...params, update } as AcpSessionNotification);
-  }
-
-  requestPermission(
-    params: AcpPermissionRequest,
-    signal?: AbortSignal,
-  ): Promise<RequestPermissionResponse> {
-    return this.inner.requestPermission(params, signal);
-  }
-
-  readTextFile(params: ReadTextFileRequest): Promise<ReadTextFileResponse> {
-    return this.inner.readTextFile(params);
-  }
-
-  writeTextFile(params: WriteTextFileRequest): Promise<WriteTextFileResponse> {
-    return this.inner.writeTextFile(params);
-  }
-
-  createElicitation(
-    params: CreateElicitationRequest,
-    signal?: AbortSignal,
-  ): Promise<CreateElicitationResponse> {
-    return this.inner.createElicitation(params, signal);
-  }
-
-  completeElicitation(params: CompleteElicitationNotification): Promise<void> {
-    return this.inner.completeElicitation(params);
-  }
-
-  authStatusUpdate(params: AuthStatusUpdateNotification): Promise<void> {
-    return this.inner.authStatusUpdate(params);
-  }
-
-  extNotification(method: string, params: Record<string, unknown>): Promise<void> {
-    return this.inner.extNotification(method, params);
-  }
-}
-
 function raceWithAbort<T>(operation: Promise<T>, signal: AbortSignal): Promise<T> {
  return new Promise<T>((resolve, reject) => {
    const cleanup = () => signal.removeEventListener("abort", onAbort);
@@ -2134,7 +2025,10 @@ export class ClaudeAcpAgent {
      fork: {},
      list: {},
      resume: {},
+      status: SESSION_STATUS_CAPABILITY,
      systemPrompt: SYSTEM_PROMPT_CAPABILITY,
+      // `session/set_title`.
+      title: {},
      ...(this.toolCallCapabilities.air.client ? { subagents: {} } : {}),
    };

@@ -7973,6 +7867,24 @@ export class ClaudeAcpAgent {
    return {};
  }

+  /**
+   * `session/status`: `open` for a session that this connection holds. A held
+   * session whose query ended (`queryClosed`) is `open` too: a `session/load`
+   * with the same params returns it as it is, and its prompts fail with what
+   * happened. Every other session is `saved` or unknown by its stored
+   * transcript (see `session-status.ts`). A subagent's session is unknown,
+   * as for the other session requests.
+   */
+  async sessionStatus({ sessionId }: SessionStatusRequest): Promise<SessionStatusResponse> {
+    if (Object.hasOwn(this.sessions, sessionId)) return { status: "open" };
+    return savedSessionStatus(sessionId);
+  }
+
+  /** See {@link sessionIndex.SessionIndexConnection.setTitle}. */
+  setSessionTitle(params: SetSessionTitleRequest): Promise<SetSessionTitleResponse> {
+    return this.sessionIndex.setTitle(params);
+  }
+
  /** Per client: see {@link sessionIndex.SessionIndexConnection.deleteSession}. */
  async deleteSession(params: DeleteSessionRequest): Promise<DeleteSessionResponse> {
    return this.sessionIndex.deleteSession(params);
@@ -10427,15 +10339,15 @@ export class ClaudeAcpAgent {
        }
      }

-      // Apply user's `availableModels` allowlist from settings.json before any
+      // Apply the effective `availableModels` allowlist before any
      // downstream model handling. `initializationResult.models` is already
      // policy-filtered by the CLI; we rebuild the picker from the allowlist
      // so the user's exact spellings (and `modelOverrides` targets) are the
      // values passed to `setModel`, keeping configOptions, the current-model
      // resolver, and the stored modelInfos consistent with what the user
      // configured. Managed `deniedModels` drops entries the CLI would refuse.
-      const settingsAvailableModels = settingsManager.getSettings().availableModels;
-      const settingsModelOverrides = settingsManager.getSettings().modelOverrides;
+      const { availableModels: settingsAvailableModels, modelOverrides: settingsModelOverrides } =
+        settingsManager.getModelSelectionSettings(configuredSettingsObject);
      const resumedModel = await resumedModelHint;
      // A resumed Fable 5.2 session lists Fable 5.2 as `fable`, as a new
      // session does (see `aliasResumedModelRow`).
@@ -11246,8 +11158,10 @@ export function v1AgentApp(
    )
    .onRequest(methods.agent.session.list, (ctx) => agent.listSessions(ctx.params))
    .onRequest(methods.agent.session.delete, (ctx) => agent.deleteSession(ctx.params))
+    .onRequest(methods.agent.session.setTitle, (ctx) => agent.setSessionTitle(ctx.params))
    .onRequest(methods.agent.session.resume, (ctx) => agent.resumeSession(ctx.params))
    .onRequest(methods.agent.session.close, (ctx) => agent.closeSession(ctx.params))
+    .onRequest(methods.agent.session.status, (ctx) => agent.sessionStatus(ctx.params))
    .onRequest(methods.agent.session.setMode, (ctx) => agent.setSessionMode(ctx.params))
    .onRequest(methods.agent.session.setConfigOption, (ctx) =>
      agent.setSessionConfigOption(ctx.params),
--- a/src/v1/client-connection.ts
+++ b/src/v1/client-connection.ts
@@ -0,0 +1,129 @@
+import {
+  AgentContext,
+  AuthStatusUpdateNotification,
+  CompleteElicitationNotification,
+  CreateElicitationRequest,
+  CreateElicitationResponse,
+  methods,
+  ReadTextFileRequest,
+  ReadTextFileResponse,
+  RequestPermissionRequest,
+  RequestPermissionResponse,
+  SessionNotification,
+  WriteTextFileRequest,
+  WriteTextFileResponse,
+} from "@agentclientprotocol/sdk/unstable";
+import type { AcpClient } from "../acp-client.js";
+import { AcpSessionNotification, asSdkSessionNotification } from "../acp-subagents.js";
+import { ChangedMetaFilter } from "./tool-calls/changed-meta-filter.js";
+import type { AcpPermissionRequest } from "../permissions/presentation.js";
+
+/**
+ * Bridges {@link AcpClient} to the connection-scoped {@link AgentContext}
+ * exposed by `AgentApp.connect(...)` as `connection.client`. The peer handle is
+ * valid for the entire connection lifetime, so it is captured once at
+ * construction.
+ */
+export class ClientConnection implements AcpClient {
+  constructor(private readonly ctx: AgentContext) {}
+
+  sessionUpdate(params: AcpSessionNotification): Promise<void> {
+    return this.ctx.notify(methods.client.session.update, asSdkSessionNotification(params));
+  }
+
+  requestPermission(
+    params: RequestPermissionRequest,
+    signal?: AbortSignal,
+  ): Promise<RequestPermissionResponse> {
+    return this.ctx.request(methods.client.session.requestPermission, params, {
+      cancellationSignal: signal,
+      stopWaitingOnCancel: true,
+    });
+  }
+
+  readTextFile(params: ReadTextFileRequest): Promise<ReadTextFileResponse> {
+    return this.ctx.request(methods.client.fs.readTextFile, params);
+  }
+
+  writeTextFile(params: WriteTextFileRequest): Promise<WriteTextFileResponse> {
+    return this.ctx.request(methods.client.fs.writeTextFile, params);
+  }
+
+  createElicitation(
+    params: CreateElicitationRequest,
+    signal?: AbortSignal,
+  ): Promise<CreateElicitationResponse> {
+    return this.ctx.request(methods.client.elicitation.create, params, {
+      cancellationSignal: signal,
+      stopWaitingOnCancel: true,
+    });
+  }
+
+  completeElicitation(params: CompleteElicitationNotification): Promise<void> {
+    return this.ctx.notify(methods.client.elicitation.complete, params);
+  }
+
+  authStatusUpdate(params: AuthStatusUpdateNotification): Promise<void> {
+    return this.ctx.notify(methods.client.auth.statusUpdate, params);
+  }
+
+  extNotification(method: string, params: Record<string, unknown>): Promise<void> {
+    return this.ctx.notify(method, params);
+  }
+}
+
+/**
+ * The client that the agent talks to. For an AIR client, every session update
+ * passes the {@link ChangedMetaFilter} last, after the native subagent routing,
+ * so a `tool_call_update` carries only the `_meta` keys that changed. ACP
+ * merges only the top-level tool call fields, not the `_meta` keys. So another
+ * client gets the full `_meta` on each update.
+ */
+export class ChangedMetaClient implements AcpClient {
+  private readonly filter = new ChangedMetaFilter();
+
+  constructor(
+    private readonly inner: AcpClient,
+    private readonly airClient: () => boolean,
+  ) {}
+
+  async sessionUpdate(params: AcpSessionNotification): Promise<void> {
+    if (!this.airClient()) return this.inner.sessionUpdate(params);
+    const update = this.filter.apply(params.update as SessionNotification["update"]);
+    if (update) await this.inner.sessionUpdate({ ...params, update } as AcpSessionNotification);
+  }
+
+  requestPermission(
+    params: AcpPermissionRequest,
+    signal?: AbortSignal,
+  ): Promise<RequestPermissionResponse> {
+    return this.inner.requestPermission(params, signal);
+  }
+
+  readTextFile(params: ReadTextFileRequest): Promise<ReadTextFileResponse> {
+    return this.inner.readTextFile(params);
+  }
+
+  writeTextFile(params: WriteTextFileRequest): Promise<WriteTextFileResponse> {
+    return this.inner.writeTextFile(params);
+  }
+
+  createElicitation(
+    params: CreateElicitationRequest,
+    signal?: AbortSignal,
+  ): Promise<CreateElicitationResponse> {
+    return this.inner.createElicitation(params, signal);
+  }
+
+  completeElicitation(params: CompleteElicitationNotification): Promise<void> {
+    return this.inner.completeElicitation(params);
+  }
+
+  authStatusUpdate(params: AuthStatusUpdateNotification): Promise<void> {
+    return this.inner.authStatusUpdate(params);
+  }
+
+  extNotification(method: string, params: Record<string, unknown>): Promise<void> {
+    return this.inner.extNotification(method, params);
+  }
+}
--- a/src/v1/session-index/connection.ts
+++ b/src/v1/session-index/connection.ts
@@ -15,11 +15,12 @@ import {
  type InitializeRequest,
  type ListSessionsRequest,
  type ListSessionsResponse,
+  type SetSessionTitleRequest,
+  type SetSessionTitleResponse,
 } from "@agentclientprotocol/sdk/unstable";
-import type { Query } from "@anthropic-ai/claude-agent-sdk";
-import type { Session } from "../acp-agent.js";
-import type { AcpClient } from "../../acp-client.js";
-import type { Logger } from "../../logger.js";
+import type { Session } from "./acp-agent.js";
+import type { AcpClient } from "../acp-client.js";
+import type { Logger } from "../logger.js";
 import {
  AIR_SESSION_ARCHIVE_CAPABILITY,
  AIR_SESSION_BATCH_GET_CAPABILITY,
@@ -29,9 +30,10 @@ import {
  AIR_SESSION_WORKTREES_CAPABILITY,
  clientSupportsAirCapability,
  withAirMeta,
-} from "../../air-extension.js";
-import type { OwnSessionState } from "./activity.js";
-import { isArchivedTitle, storedTitle, visibleTitle } from "./archive-title.js";
+} from "../air-extension.js";
+import type { OwnSessionState } from "../session-index/activity.js";
+import { isArchivedTitle, visibleTitle } from "../session-index/archive-title.js";
+import { renameSession, retitleSession, type RetitledSession } from "../session-index/rename.js";
 import {
  LIST_CHANGES_METHOD,
  LIST_SUBSCRIBE_METHOD,
@@ -41,12 +43,11 @@ import {
  type ListSubscribeRequest,
  type ListSubscribeResponse,
  type ListUnsubscribeRequest,
-} from "./list-subscriptions.js";
+} from "../session-index/list-subscriptions.js";
 import {
  archiveInsteadOfDelete,
  deleteSessionIfStored,
  archiveTo,
-  renameTo,
  parseRenameSessionRequest,
  parseSessionIdRequest,
  parseBatchGetSessionsRequest,
@@ -55,13 +56,12 @@ import {
  SESSION_RENAME_METHOD,
  SESSION_UNARCHIVE_METHOD,
  SessionIndexService,
+  transcriptWriter,
  type RenameSessionRequest,
-  type RetitleOptions,
  type SessionIdRequest,
-  type TitleChange,
  type BatchGetSessionsRequest,
  type BatchGetSessionsResponse,
-} from "./service.js";
+} from "../session-index/service.js";

 /** What the session index keeps on each `Session`. */
 export type SessionIndexFields = {
@@ -115,9 +115,9 @@ export class SessionIndexConnection {
   * exactly as before.
   */
  service?: SessionIndexService;
-  /** The archive behind `session/delete` of an AIR client without
-   *  `sessionIndex`: the same writes, without a list or a watcher. */
-  private archiver?: SessionIndexService;
+  /** The transcript writes of a client without `sessionIndex` (see
+   *  {@link transcriptWriter}). */
+  private transcripts?: SessionIndexService;
  /** When the query of a session failed here, by session id. */
  private readonly failedQueries = new Map<string, number>();

@@ -250,24 +250,34 @@ export class SessionIndexConnection {
    return sessions.filter((session) => !isArchivedTitle(session.customTitle));
  }

-  /** `_session/rename`: names a session; no generated title replaces it.
-   *  An archived session stays archived. */
+  /** `_session/rename` of a `sessionIndex` client (see {@link renameSession}). */
  async rename(request: RenameSessionRequest): Promise<EmptyResponse> {
-    const index = this.requireService(SESSION_RENAME_METHOD);
-    const { sessionId } = request;
-    // As the CLI keeps it, and never with the archive prefix: a rename does
-    // not change the archive state.
-    const title = storedTitle(request.title, false, sessionId);
-    // The title as stored: an archived one is cut with its prefix.
-    const shown = (stored: string | undefined) =>
-      stored === undefined ? title : visibleTitle(stored);
-    await this.retitle(index, sessionId, renameTo(title), shown, {
-      mayBeUnwritten: true,
-      sidecar: "always",
-    });
+    await this.renameWith(this.requireService(SESSION_RENAME_METHOD), request);
    return {};
  }

+  /** `session/set_title`, for every client: the rename of `_session/rename`,
+   *  without the session index of a client that did not ask for it. */
+  async setTitle(request: SetSessionTitleRequest): Promise<SetSessionTitleResponse> {
+    const title = await this.renameWith(
+      this.service ?? this.writer(),
+      parseRenameSessionRequest(request),
+    );
+    return { title };
+  }
+
+  private renameWith(index: SessionIndexService, request: RenameSessionRequest): Promise<string> {
+    return renameSession(index, request, this.loaded(request.sessionId), (stored) =>
+      this.clientTitle(stored),
+    );
+  }
+
+  /** The session loaded here, as a rename reaches it. */
+  private loaded(sessionId: string): RetitledSession | undefined {
+    const session = this.host.agent.sessions[sessionId];
+    return session && { session, titles: session.titles };
+  }
+
  /** `_session/archive`: hides a session from the default list and stops
   *  it. Idempotent; the session need not be loaded. A session loaded here
   *  is interrupted, retitled through its CLI while that still runs, then
@@ -279,7 +289,7 @@ export class SessionIndexConnection {
    // No turn goes on after the archive: the interrupt goes to the CLI ahead
    // of the rename.
    if (loaded) await this.host.interruptSession(sessionId);
-    await this.retitle(index, sessionId, archiveTo(true), undefined, {
+    await retitleSession(index, sessionId, archiveTo(true), undefined, this.loaded(sessionId), {
      mayBeUnwritten: this.isUnwrittenSession(sessionId),
      sidecar: "existing",
    });
@@ -308,7 +318,7 @@ export class SessionIndexConnection {
  async unarchive(params: SessionIdRequest): Promise<EmptyResponse> {
    const index = this.requireService(SESSION_UNARCHIVE_METHOD);
    const { sessionId } = params;
-    await this.retitle(index, sessionId, archiveTo(false), undefined, {
+    await retitleSession(index, sessionId, archiveTo(false), undefined, this.loaded(sessionId), {
      mayBeUnwritten: this.isUnwrittenSession(sessionId),
      sidecar: "existing",
    });
@@ -316,58 +326,6 @@ export class SessionIndexConnection {
    return {};
  }

-  /**
-   * Retitles a session (see {@link SessionIndexService.retitle}). A session
-   * this connection runs is titled through its CLI (`rename_session`). A
-   * loaded session's title state takes the change as a client title, so no
-   * generated title replaces it; `publish` is the title it then publishes.
-   */
-  private async retitle(
-    index: SessionIndexService,
-    sessionId: string,
-    change: TitleChange,
-    publish: Parameters<Session["titles"]["setExplicitTitle"]>[0],
-    options: Pick<RetitleOptions, "mayBeUnwritten" | "sidecar">,
-  ): Promise<void> {
-    const session = this.host.agent.sessions[sessionId];
-    // Decided once a title generation in flight has ended: the query may
-    // have closed meanwhile.
-    const persist = () => {
-      const query = session?.query as
-        | (Query & { renameSession?: (title: string, sessionId?: string) => Promise<void> })
-        | undefined;
-      // A closed session's CLI is gone here: only a running query titles it.
-      const running = session !== undefined && !session.queryClosed;
-      if (running && typeof query?.renameSession !== "function") {
-        // Its CLI holds the title and would write it back over ours.
-        throw RequestError.invalidRequest(
-          { sessionId },
-          "The Claude Code CLI of this session cannot change its title while it runs.",
-        );
-      }
-      const live = running
-        ? {
-            cwd: session.cwd,
-            rename: (title: string) => query!.renameSession!(title, sessionId),
-            stored: () => session.titles.storedTitle,
-            remember: (title: string) => session.titles.rememberStoredTitle(title),
-            shown: session.titles.shownTitle,
-          }
-        : undefined;
-      return index.retitle(sessionId, change, {
-        ...options,
-        // Without its CLI, a session needs its transcript.
-        mayBeUnwritten: live !== undefined && options.mayBeUnwritten,
-        live,
-      });
-    };
-    if (session) {
-      await session.titles.setExplicitTitle(publish, persist);
-    } else {
-      await persist();
-    }
-  }
-
  /**
   * `session/delete`:
   * - A `sessionIndex` client deletes for real: every transcript, whoever
@@ -388,19 +346,19 @@ export class SessionIndexConnection {
    if (this.service) {
      await this.service.delete(params.sessionId, loaded);
    } else if (this.host.isAirClient()) {
-      await archiveInsteadOfDelete(params.sessionId, this.airArchiver());
+      await archiveInsteadOfDelete(params.sessionId, this.writer());
    } else {
-      await deleteSessionIfStored(params.sessionId);
+      // After a `session/set_title` of the session in flight.
+      await this.writer().exclusive(params.sessionId, () =>
+        deleteSessionIfStored(params.sessionId),
+      );
    }
    return {};
  }

-  private airArchiver(): SessionIndexService {
-    this.archiver ??= new SessionIndexService({
-      logError: (message, error) =>
-        this.host.agent.logger.error(`[session-index] ${message}:`, error),
-    });
-    return this.archiver;
+  private writer(): SessionIndexService {
+    this.transcripts ??= transcriptWriter(this.host.agent.logger);
+    return this.transcripts;
  }

  private requireService(method: string): SessionIndexService {
--- a/src/v2/agent.ts
+++ b/src/v2/agent.ts
@@ -44,6 +44,12 @@ import { mergeEffortSettings } from "../session-effort.js";
 import { configuredSettings, resolveThinkingConfig } from "../session-env.js";
 import { resolveInitialPermissionMode } from "../session-mode.js";
 import { sanitizeTitle } from "../session-titles.js";
+import { renameSession } from "../session-index/rename.js";
+import {
+  parseRenameSessionRequest,
+  transcriptWriter,
+  type SessionIndexService,
+} from "../session-index/service.js";
 import { SettingsManager } from "../settings.js";
 import { STARTUP_FAILURE_RESULTS_ENV, startupFailureError } from "../startup-failure.js";
 import { createPostToolUseHook } from "../tools.js";
@@ -58,6 +64,7 @@ import { modelSwitchHook, SessionConfig } from "./config.js";
 import { fileChangePreviewHook } from "./file-preview.js";
 import { canUseTool, denyingStoppedWork } from "./permissions.js";
 import { reportHooks } from "./reports.js";
+import { savedSessionStatus } from "../session-status.js";
 import { SessionRestarts, type SetupParams } from "./restarts.js";
 import { V2Session, type SessionConnection } from "./session.js";
 import {
@@ -106,7 +113,9 @@ export function v2AgentApp(
      .onRequest(v2.methods.agent.session.fork, ({ params }) => agent.forkSession(params))
      .onRequest(v2.methods.agent.session.list, ({ params }) => agent.listSessions(params))
      .onRequest(v2.methods.agent.session.close, ({ params }) => agent.closeSession(params))
+      .onRequest(v2.methods.agent.session.status, ({ params }) => agent.sessionStatus(params))
      .onRequest(v2.methods.agent.session.delete, ({ params }) => agent.deleteSession(params))
+      .onRequest(v2.methods.agent.session.setTitle, ({ params }) => agent.setTitle(params))
      .onRequest(v2.methods.agent.session.setConfigOption, ({ params }) =>
        agent.setConfigOption(params),
      )
@@ -152,6 +161,8 @@ class V2Agent implements AgentHandle, SessionConnection {
  private readonly guard: SubscriptionGuard;
  /** The restarts of the sessions' queries, for a new route or account (see `restarts.ts`). */
  private readonly restarts: SessionRestarts;
+  /** The transcript writes of `session/set_title`, made at its first call (see `transcriptWriter`). */
+  private transcripts: SessionIndexService | undefined;
  /** What the client declared in `initialize`. */
  private clientCapabilities: v2.ClientCapabilities | null | undefined;
  /** The elicitation modes that the client advertised in `initialize`. */
@@ -452,6 +463,25 @@ class V2Agent implements AgentHandle, SessionConnection {
      : { sessions };
  }

+  /**
+   * `session/status`. `open`, with its foreground state, for a session whose
+   * query runs here. Every other session is `saved` or unknown by its stored
+   * transcript (see `session-status.ts`): one that a resume is still
+   * starting, and one whose query ended without `session/close`, which a
+   * resume starts again.
+   *
+   * A subagent's session does not advertise `status`, and is refused like
+   * its other requests. Its parent's `subagent_update` reports its state.
+   *
+   * It waits for no resume, restart or close, and changes nothing.
+   */
+  async sessionStatus({ sessionId }: v2.SessionStatusRequest): Promise<v2.SessionStatusResponse> {
+    const session = this.sessions.get(sessionId);
+    if (session) return { status: "open", state: session.statusState() };
+    if (this.ownerOfChild(sessionId)) throw restrictedChild(sessionId, "ask the status of");
+    return savedSessionStatus(sessionId);
+  }
+
  /** Closing is idempotent: a session that is not active closes at once. */
  async closeSession({ sessionId }: v2.CloseSessionRequest): Promise<v2.CloseSessionResponse> {
    if (this.ownerOfChild(sessionId)) throw restrictedChild(sessionId, "close");
@@ -481,7 +511,9 @@ class V2Agent implements AgentHandle, SessionConnection {
    const live = this.sessions.get(sessionId);
    if (live || this.stopped.has(sessionId)) await this.closeSession({ sessionId });
    try {
-      await deleteSession(sessionId, live ? { dir: live.cwd } : undefined);
+      // After a `session/set_title` of the session in flight.
+      const remove = () => deleteSession(sessionId, live ? { dir: live.cwd } : undefined);
+      await (this.transcripts ? this.transcripts.exclusive(sessionId, remove) : remove());
    } catch (error) {
      // A session without a transcript, such as one never prompted, has nothing to delete.
      if (error instanceof Error && /not found/i.test(error.message)) return {};
@@ -490,6 +522,30 @@ class V2Agent implements AgentHandle, SessionConnection {
    return {};
  }

+  /**
+   * `session/set_title`, as the v1 core does it (see `session-index/rename.ts`).
+   * The session need not be active. An active one publishes the title, and no
+   * generated title replaces it.
+   */
+  async setTitle(params: v2.SetSessionTitleRequest): Promise<v2.SetSessionTitleResponse> {
+    const request = parseRenameSessionRequest(params);
+    const { sessionId } = request;
+    if (this.ownerOfChild(sessionId)) throw restrictedChild(sessionId, "retitle");
+    // Renamed through the query that runs once a restart or resume settled.
+    await this.restarts.settled(sessionId);
+    await this.setupSettled(sessionId);
+    const writer = (this.transcripts ??= transcriptWriter(this.logger));
+    for (;;) {
+      const session = this.sessions.get(sessionId);
+      const title = await renameSession(writer, request, session?.reports.retitled());
+      // A restart or resume started another query of the session while the
+      // rename ran: its CLI may hold the old title and write it back, so it
+      // is renamed too. A session that only closed took the title already.
+      const now = this.sessions.get(sessionId);
+      if (now === undefined || now === session) return { title };
+    }
+  }
+
  async setConfigOption(
    params: v2.SetSessionConfigOptionRequest,
  ): Promise<v2.SetSessionConfigOptionResponse> {
@@ -859,6 +915,7 @@ class V2Agent implements AgentHandle, SessionConnection {
        resumed,
        sessionId,
        this.logger,
+        configured,
      );
    } catch (error) {
      // Claude Code refused a fresh session's model pin.
--- a/src/v2/background.ts
+++ b/src/v2/background.ts
@@ -103,6 +103,17 @@ export class V2Background {
    return notification;
  }

+  /**
+   * `state` as the current work state of the session `sessionId`, with its
+   * list when it reports one: what {@link stamp} makes of the session's
+   * `state_update`. Unlike `stamp`, it does not count as a state that carried
+   * the list, so a later change of the list is reported as before.
+   */
+  snapshot(sessionId: string, state: WorkStateName): v2.StateUpdate {
+    const session = this.sessions.get(sessionId);
+    return session ? withBackground(currentState(state), session.items) : currentState(state);
+  }
+
  /**
   * Records the new list of a session, and returns the updates that report it:
   *
--- a/src/v2/initialize.ts
+++ b/src/v2/initialize.ts
@@ -6,6 +6,7 @@
 import type { AuthMethod } from "@agentclientprotocol/sdk/unstable";
 import type * as v2 from "@agentclientprotocol/sdk/experimental/v2/unstable";
 import { SYSTEM_PROMPT_CAPABILITY } from "../client-system-prompt.js";
+import { SESSION_STATUS_CAPABILITY } from "../session-status.js";

 /**
 * The session capabilities that the v2 core serves.
@@ -17,6 +18,7 @@ import { SYSTEM_PROMPT_CAPABILITY } from "../client-system-prompt.js";
 * - The prompt content and MCP transports that the v1 `initialize` lists too:
 *   images, embedded context, and HTTP servers. v2 has no SSE transport.
 * - `systemPrompt`, in `append` and `override` mode.
+ * - `session/status` (unstable), with the foreground state of an open session.
 */
 export const V2_SESSION_CAPABILITIES: v2.SessionCapabilities = {
  prompt: { image: {}, embeddedContext: {} },
@@ -25,6 +27,9 @@ export const V2_SESSION_CAPABILITIES: v2.SessionCapabilities = {
  fork: {},
  additionalDirectories: {},
  systemPrompt: SYSTEM_PROMPT_CAPABILITY,
+  status: SESSION_STATUS_CAPABILITY,
+  // `session/set_title`.
+  title: {},
 };

 /** v2 names the id of a method `methodId`, requires `type`, and lists `env` as name and value pairs. */
--- a/src/v2/outcome.ts
+++ b/src/v2/outcome.ts
@@ -17,7 +17,7 @@ import type {
 import { AUTONOMOUS_RESULT_ORIGINS } from "../result-end.js";
 import { isSyntheticLoginMessage } from "../message-filters.js";
 import { resultEnd } from "../result-end.js";
-import { providerFailureCategory } from "../session-failure-extension.js";
+import { assistantMessageText, providerFailureCategory } from "../session-failure-extension.js";
 import {
  getMatchingModelUsage,
  modelUsageIncrement,
@@ -109,8 +109,8 @@ function failed(error: RequestError): IdleOutcome {

 /**
 * What the assistant messages of the open turn reported about its end: the
- * error kind of a failed API request, Claude Code's sign-in message, and a
- * refusal's explanation. Read from the main conversation's messages.
+ * error kind and text of a failed API request, Claude Code's sign-in message,
+ * and a refusal's explanation. Read from the main conversation's messages.
 */
 export class TurnReport {
  errorKind: SDKAssistantMessageError | undefined;
@@ -118,12 +118,22 @@ export class TurnReport {
  loginRequired = false;
  /** The explanation of the turn's refusal. */
  refusalExplanation: string | undefined;
+  /**
+   * The text of the message that Claude Code wrote for a failed API request,
+   * e.g. "API Error: Connection lost mid-response. The response above may be
+   * incomplete.", until {@link takeApiError} reads it.
+   */
+  private apiError: string | undefined;

  /**
-   * An assistant message of the main conversation. Returns whether it is
-   * Claude Code's sign-in message, which the client is not shown: its
-   * `/login` instruction is for Claude Code's terminal, and the turn's idle
-   * fails with `authRequired` instead.
+   * An assistant message of the main conversation. Returns whether the
+   * client is not shown it as Claude's text:
+   *
+   * - Claude Code's sign-in message. Its `/login` instruction is for Claude
+   *   Code's terminal, and the turn's idle fails with `authRequired` instead.
+   * - The message that Claude Code wrote for a failed API request (`error` on
+   *   a `<synthetic>` message). The turn's idle carries it when the turn
+   *   fails, and a notice otherwise (see {@link takeApiError}).
   */
  assistant(message: SDKAssistantMessage): boolean {
    if (message.error) this.errorKind = message.error;
@@ -131,11 +141,24 @@ export class TurnReport {
      this.refusalExplanation =
        message.message.stop_details?.explanation ?? this.refusalExplanation;
    }
-    if (!isSyntheticLoginMessage(message.message)) return false;
-    this.loginRequired = true;
+    if (isSyntheticLoginMessage(message.message)) {
+      this.loginRequired = true;
+      return true;
+    }
+    if (!message.error || message.message.model !== "<synthetic>") return false;
+    const text = assistantMessageText(message.message);
+    if (!text) return false;
+    this.apiError = text;
    return true;
  }

+  /** The text of the turn's failed API request that no notice or idle reported yet. */
+  takeApiError(): string | undefined {
+    const text = this.apiError;
+    this.apiError = undefined;
+    return text;
+  }
+
  /**
   * Claude Code's `model_refusal_no_fallback`: the explanation when the
   * refused message carried none (older CLIs, gateways that drop
@@ -155,6 +178,7 @@ export class TurnReport {
    this.errorKind = undefined;
    this.loginRequired = false;
    this.refusalExplanation = undefined;
+    this.apiError = undefined;
  }
 }

--- a/src/v2/reports.ts
+++ b/src/v2/reports.ts
@@ -41,6 +41,7 @@ import {
  mcpServerStartupNotice,
  normalizeNoticeText,
  noticeUpdate,
+  splitNoticeText,
 } from "../session-notices.js";
 import {
  DEFAULT_CONTEXT_WINDOW,
@@ -52,6 +53,7 @@ import {
  type UsageSnapshot,
 } from "../session-usage.js";
 import { SessionTitles, type TitledSession } from "../session-titles.js";
+import type { RetitledSession } from "../session-index/rename.js";
 import type { SettingsManager } from "../settings.js";
 import { createTaskHook } from "../tools.js";
 import type { SessionOutput } from "./stream.js";
@@ -223,6 +225,24 @@ export class SessionReports {
    );
  }

+  /**
+   * A notice of the message that Claude Code wrote for a failed API request
+   * (see `TurnReport.takeApiError`). It is a turn's notice, so a result that
+   * repeats its text is not shown again.
+   */
+  apiError(text: string): void {
+    this.host.emit([
+      {
+        sessionId: this.host.sessionId,
+        update: noticeUpdate({
+          severity: "error",
+          ...splitNoticeText(text, "Claude reported an API error"),
+        }),
+      },
+    ]);
+    this.noticeTexts.push(normalizeNoticeText(text));
+  }
+
  /**
   * Claude Code's session state went `idle`: the idle compaction may arm, and
   * the title may have landed (see {@link SessionTitles.onTurnEnd}).
@@ -263,6 +283,13 @@ export class SessionReports {
    this.titles.onAssistantText(content);
  }

+  /** The session and its title state, as a client rename sets it
+   *  (`session/set_title`); undefined until it starts and once it ends. */
+  retitled(): RetitledSession | undefined {
+    const session = this.host.titledSession();
+    return session && { session, titles: this.titles };
+  }
+
  /** Sends the session's current title and `updatedAt`, as `session/resume` asks. */
  async publishTitle(): Promise<void> {
    const session = this.host.titledSession();
--- a/src/v2/session.ts
+++ b/src/v2/session.ts
@@ -60,6 +60,7 @@ import { Pushable } from "../utils.js";
 import { v1PromptRequest } from "./prompt.js";
 import { V2Background, stateUpdate as currentStateUpdate } from "./background.js";
 import type { V2UpdateTranslator } from "./update-translator.js";
+import { isLocalCommandOutput } from "../message-filters.js";
 import { MODEL_CONFIG_ID } from "../session-model.js";
 import { modelRefusalFallback, noticeUpdate } from "../session-notices.js";
 import { planModeUpdate } from "../exit-plan.js";
@@ -362,6 +363,15 @@ export class V2Session implements RequestTarget {
    ];
  }

+  /**
+   * The `state` of `session/status`: the foreground state now, with the
+   * session's list and without a stop reason. It sends nothing and changes
+   * nothing.
+   */
+  statusState(): v2.StateUpdate {
+    return this.background.snapshot(this.sessionId, this.foregroundState());
+  }
+
  /**
   * Replaces the session's MCP servers, as a resume of the active session
   * asks. The same servers stay as they are, connected.
@@ -917,7 +927,8 @@ export class V2Session implements RequestTarget {
        if (message.parent_tool_use_id === null) this.usage.assistant(message.message.model);
        if (this.stopped.drops(message)) return;
        if (message.parent_tool_use_id === null) {
-          // Claude Code's sign-in message is not shown (see `TurnReport`).
+          // Claude Code's sign-in message and its message for a failed API
+          // request are not shown as Claude's text (see `TurnReport`).
          if (this.turnReport.assistant(message)) return;
          this.outputStarts();
          this.reports.assistant(message);
@@ -929,6 +940,12 @@ export class V2Session implements RequestTarget {
        // in. A prompt Claude Code reported `started` for is inserted already.
        if ("isReplay" in message && message.isReplay) {
          if (message.uuid && message.parent_tool_use_id === null) {
+            // The output of a local command that Claude Code ran outside a
+            // turn, such as the "Set model to …" of a model change, is no
+            // prompt: no result or `command_lifecycle` frame would end its turn.
+            if (!this.pending.has(message.uuid) && isLocalCommandOutput(message.message.content)) {
+              return;
+            }
            // A message typed in another client of the session.
            const remote = this.remoteControl.remoteMessage(message);
            if (remote !== undefined) this.output.userMessage(remote, message.uuid);
@@ -1121,6 +1138,8 @@ export class V2Session implements RequestTarget {
      this.fastModeReported(message);
    }
    this.reports.result(message);
+    // Before the result's text below, which can repeat the failed request's.
+    this.reportApiError(end);
    // The turn goes on in a fresh context (see `ClearContext`).
    if (this.clearContext.holdsResult(message, end)) {
      this.turnReport.reset();
@@ -1172,6 +1191,19 @@ export class V2Session implements RequestTarget {
    return reporting.then(() => this.closeTurn());
  }

+  /**
+   * Sends the text of a failed API request that Claude Code wrote into the
+   * conversation (see `TurnReport.assistant`) as a notice. A turn whose idle
+   * fails sends none: its error carries the failure. `end` is the turn's
+   * result, if it has one.
+   */
+  private reportApiError(end: TurnEnd | undefined): void {
+    const text = this.turnReport.takeApiError();
+    if (!text) return;
+    if (idleOutcome(end, this.cancelledWork, this.turnReport).stopReason === "error") return;
+    this.reports.apiError(text);
+  }
+
  /**
   * Claude Code's `idle`. The one that follows a result is that result's, and
   * can come after the next cycle's first output. Any other ends the open
@@ -1281,6 +1313,8 @@ export class V2Session implements RequestTarget {
        if (request.coveredByCancel) request.abort.abort();
      }
    }
+    // A turn that ends without a result, such as an interrupted one.
+    this.reportApiError(this.lastEnd);
    this.reports.turnEnded();
    this.elicitations.turnEnded();
    this.fileChanges?.turnClosed(cancelled);
--- a/src/v2/setup.ts
+++ b/src/v2/setup.ts
@@ -11,6 +11,7 @@ import {
  type ModelInfo,
  type Options,
  type Query,
+  type Settings,
 } from "@anthropic-ai/claude-agent-sdk";
 import type { Logger } from "../logger.js";
 import type { NewSessionMeta } from "../new-session-meta.js";
@@ -67,13 +68,15 @@ export async function sessionModels(
  resumed: { model?: string } | undefined,
  sessionId: string,
  logger: Logger,
+  configuredSettings?: Settings,
 ): Promise<{
  models: SessionModelState;
  modelInfos: ModelInfo[];
  currentModelInfo: ModelInfo | undefined;
  allowlistedModelInfo: ModelInfo | undefined;
 }> {
-  const { availableModels, modelOverrides } = settings.getSettings();
+  const { availableModels, modelOverrides } =
+    settings.getModelSelectionSettings(configuredSettings);
  // A resumed Fable 5.2 session lists Fable 5.2 as `fable`, as a new session does.
  const listed = aliasResumedModelRow(sdkModels, resumed?.model);
  const allowed = Array.isArray(availableModels)
Author	SHA1	Message	Date
acp-release-bot[bot]	1ffbb6b577	chore(main): release 0.105.0 (#1583 ) 🤖 I have created a release beep boop --- ## [0.105.0](https://github.com/agentclientprotocol/claude-agent-acp/compare/v0.104.1...v0.105.0) (2026-11-10) ### Features * serve session/set_title on ACP v1 and v2 ([#1585](https://github.com/agentclientprotocol/claude-agent-acp/issues/1585)) ([`a4a8534`](`a4a8534c23`)) * serve session/status on v1 and v2 ([#1584](https://github.com/agentclientprotocol/claude-agent-acp/issues/1584)) ([`6bc2e05`](`6bc2e058cb`)) ### Bug Fixes * include inline model settings in the model picker ([#1488](https://github.com/agentclientprotocol/claude-agent-acp/issues/1488)) ([`36cb674`](`36cb674589`)) * keep a v2 session idle when the model changes between turns ([#1586](https://github.com/agentclientprotocol/claude-agent-acp/issues/1586)) ([`f5d7916`](`f5d79167a6`)) * report Claude Code's API error message as a notice in v2 ([#1582](https://github.com/agentclientprotocol/claude-agent-acp/issues/1582)) ([`99cc1f3`](`99cc1f3245`)) --- This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please). Co-authored-by: acp-release-bot[bot] <246668977+acp-release-bot[bot]@users.noreply.github.com>	2026-11-10 21:51:06 +01:00
Slapoguzov Alexander	36cb674589	fix: include inline model settings in the model picker (#1488 ) When `CLAUDE_MODEL_CONFIG` or caller-provided SDK settings list a model that the SDK omits, include those settings when rebuilding the picker. Configured models such as Bedrock Haiku versions appear with their provider override IDs and can be selected in both ACP v1 and v2. Merge file and inline model lists with the SDK's array semantics, preserve managed allowlists and override precedence, and keep the existing shallow caller-over-environment merge. The refreshed change preserves upstream's resumed-model alias handling and uses the v2 setup path introduced on current main. This repairs explicitly configured models; it does not discover an older model from a gateway listing or change the SDK's family defaults. Validation on upstream main `a1d83c60310f33cbc3cd78f6b6133278e754efd5` with SDK 0.3.321: - TypeScript compilation, ESLint and Prettier checks passed using their installed executables (the host npm script launcher exits 194). - 181 focused tests passed, including managed policy and environment, caller-object and caller-file settings; both v1 and v2 select the configured provider ID. - The three new v2 regression cases fail on unchanged main because the configured models are missing. - Full suite passed: 3,952 tests, 33 skipped. The first sandboxed run could not open a local socket or receive filesystem watcher events; the unchanged candidate passed with host test execution. - No real model inference or live provider calls were used. --------- Co-authored-by: Codex <codex@openai.com> Co-authored-by: Aleksandr Slapoguzov <aleksandr.slapoguzov@jetbrains.com> Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>	2026-11-10 21:11:22 +01:00
Ben Brandt	f5d79167a6	fix: keep a v2 session idle when the model changes between turns (#1586 ) On ACP v2, changing the model of an idle session left the session reporting `running` with no work in progress, and it never reported `idle` again until some later turn ended. A client that refuses prompts while the session is `running` could then never send the prompt that would end it. ## Cause After `setModel`, Claude Code echoes a user message that carries only the local command's output: ```json { "type": "user", "message": { "role": "user", "content": "<local-command-stdout>Set model to `haiku (claude-haiku-5-5)`</local-command-stdout>" }, "parent_tool_use_id": null, "uuid": "…", "isReplay": true } ``` The v2 session read every top-level echo as a prompt that Claude Code took in, and opened a turn for it. A model change runs no turn: no `command_lifecycle` frame, `result` or `session_state_changed` follows the echo, so nothing closed that turn. Captured against the bundled CLI (adapter 0.104.1): `state_update running` went out 18 ms after `session/set_config_option`, and no `idle` followed in the next 75 seconds. ## Fix An echo whose content is only local command output, and whose uuid is not one of the session's pending prompts, no longer opens a turn. The check is `isLocalCommandOutput` in `message-filters.ts`, next to the helpers that already recognize these markers. The pending-prompt exception keeps a client's own prompt working with a CLI that sends no `command_lifecycle` frames, where the echo is the only sign that the prompt was inserted. ## Scope - v2 only. The v1 core takes its state from `session_state_changed` and does not open turns at echoes. - I captured a model change. Other local commands that Claude Code runs outside a turn and echoes the same way are covered by the same check, but I did not capture them. ## Testing - New case in `src/tests/v2/v2.test.ts` sends the echo as the CLI sent it. Without the fix it fails with `expected [ 'running' ] to deeply equal []`. - Reran the capture against the bundled CLI with the fix: no `running` after either model change, and the next prompt ran `running` then `idle`. - `npm run check` and `npm run test:run` pass.	2026-11-10 18:49:50 +00:00
Ben Brandt	a4a8534c23	feat: serve session/set_title on ACP v1 and v2 (#1585 ) Implements the [`session/set_title` RFD](https://agentclientprotocol.com/rfds/session-set-title) on ACP v1 and v2. ## What clients get - v1 advertises `agentCapabilities.sessionCapabilities.title: {}` and v2 advertises `capabilities.session.title: {}`. Both serve `session/set_title` for every client. - The session does not need to be loaded. A session that runs on this connection is renamed through its CLI (`rename_session`). Any other session gets the `custom-title` and `agent-name` records in every copy of its transcript, plus the `custom-title.json` sidecar, as the CLI's `/rename` writes them. - The title is normalized the way `_session/rename` normalizes it: whitespace collapsed, cut to the CLI's 200 characters. The response carries the stored title, as that client's `session/list` shows it. On v1 an AIR client gets it without the `[archived] ` prefix. An archived session stays archived. - A loaded session publishes `session_info_update { title }`. A title generation in flight finishes first, and no generated title replaces the client's. - Errors: a title that is empty after normalization returns `-32602`. A session that is not loaded and has no transcript returns `-32002`. On v2, a subagent session is refused, as close and delete refuse it. ## Structure - The transcript writer behind `_session/rename` lived in `src/v1/session-index/`, which v2 cannot import. Everything there except `connection.ts` moves to the shared `src/session-index/` with no change beyond import paths. `connection.ts` becomes `src/v1/session-index.ts`. - `src/session-index/rename.ts` holds the rename logic that used to be in `SessionIndexConnection.rename`/`retitle`. `_session/rename` and `session/set_title` on both versions call it. - Clients without `sessionIndex` (and every v2 client) use a `SessionIndexService` with no list and no watcher (`transcriptWriter`). Their `session/delete` now runs inside that service's per-session `exclusive()`, so a delete cannot race a rename that is still appending records. - If a restart or resume starts a new query of a v2 session while a rename runs, v2 renames through the new query too. Its CLI could otherwise hold the old title and write it back. This doesn't use the SDK's top-level `renameSession()`. It writes only a `custom-title` record to the first copy of the transcript it finds, with no `agent-name` and no sidecar, so a session renamed earlier through `/rename` would keep its old name in the CLI and in AIR. ## Tests - v1 (`session-index.test.ts`): a stored session for a client without the session index; an archived session for three clients (AIR with `sessionIndex`, AIR without it, a client that is not AIR); unknown session and empty title. - v2 (`acp-v2.test.ts`): an active session through its CLI with the published update; a stored session's records; the rename that a resume overtakes; unknown session and empty title. - Golden files: only the `initialize` capability line changes. `compare.ts` now allows the `title` capability against the origin/main baseline. - Not run: `npm run test:integration` against the real CLI. The delete/rename ordering has no test, since it is a timing race.	2026-11-10 18:28:46 +00:00
Ben Brandt	6bc2e058cb	feat: serve session/status on v1 and v2 (#1584 ) Implements the unstable [Session status RFD](https://agentclientprotocol.com/rfds/session-status) on both agents, and advertises `status: {}` in the v1 `sessionCapabilities` and the v2 `capabilities.session`. ## What it answers \| Session \| v1 \| v2 \| \| --- \| --- \| --- \| \| Held by this connection \| `open` \| `open` with `state` \| \| Not held, non-empty transcript stored \| `saved` \| `saved` \| \| Not held, no transcript \| `-32002` with `data.sessionId` \| same \| \| Subagent session \| `-32002` \| `-32602`, as resume, close, fork and delete of one \| - The request starts no query, sends no update, and waits for no resume, restart or close. - On v2, `state` is the foreground state as a `state_update` snapshot holds it: with the session's `background` list and without a stop reason. `V2Background.snapshot` builds it without marking the list as reported, so a status request does not change which later `state_update`s go out. - `saved` or unknown is decided in the new shared `src/session-status.ts`: a non-empty `<sessionId>.jsonl` in any project directory. The request names no `cwd`, so a resume with another `cwd` can still fail with `-32002`. A directory that cannot be read for another reason than being absent fails the request and does not answer `-32002`. ## Behaviour to review - A v1 session whose query ended reads `open`. The connection still holds it, and a `session/load` with the same params returns it as it is, so `saved` would point the client at a resume that revives nothing. Its prompts fail with the "session ended" error. v2 drops such a session and answers from its transcript. - A session that was never prompted is unknown once it is closed. Claude Code writes the transcript at the first prompt, and a resume of it fails with `-32002` too. - A subagent session does not advertise `status`, so v2 refuses the request like its other requests, and v1 does not know the id. - `open` is per connection. Each connection has its own agent and its own Claude Code processes. ## Not done - The lookup does one `readdir` and one `stat` per project directory for each probe of a session that is not held. Sharing the v1 session index's cached scan is a follow-up. - Not run against the real CLI (`npm run test:integration`). ## Other changes - `isSessionId` and `projectsRoot` moved from `src/v1/session-index/project-dirs.ts` to `src/paths.ts`, so the shared module can use them. - The 40 v2 and 2 AIR scenario golden files gain the capability in `initialize`, and the origin/main comparison allows it, next to `systemPrompt` and `auth.status`. - The README lists `session/status` in the v2 surface.	2026-11-10 18:11:39 +00:00
Ben Brandt	99cc1f3245	fix: report Claude Code's API error message as a notice in v2 (#1582 ) ## Problem When an API request fails, Claude Code writes its own assistant message into the conversation, e.g. "API Error: Connection lost mid-response. The response above may be incomplete." The SDK marks it with `error` on a `<synthetic>` message. The v2 agent forwarded that message as an ordinary `agent_message_chunk`, so clients showed it as Claude's own prose. Right after a thinking block it reads as if Claude wrote it, and a client cannot tell it apart without matching the string. ## Change The v2 agent no longer sends that message as Claude's text: - When the turn fails, the idle's `error` already carries the failure, so nothing else is sent. - Otherwise the text goes out as a `notice` with severity `error`, once, before the turn's idle. A result that repeats the same text is not shown again. Claude Code's sign-in message is handled as before. ## Not changed - v1 keeps its current behaviour: clients with the session-failure extension already drop this text, and others keep the transcript line. - `session/load` replay still shows these messages as text. `getSessionMessages` strips the `error` marker, so replay cannot identify them without matching prose. ## Testing - New v2 cases: a notice when the turn ends normally, one notice when the result repeats the text, and no notice when the idle fails. They fail without the change. - `npm run check` and `npm run test:run` pass.	2026-11-10 18:51:11 +01:00
Mark Tkachenko	bce309f482	refactor: move the v1 client connection out of acp-agent.ts (#1576 ) Moves `ClientConnection` and `ChangedMetaClient` verbatim from `src/v1/acp-agent.ts` into `src/v1/client-connection.ts`. No behaviour change. - Both classes gain `export`; nothing else in them changes. - `client-connection.ts` imports nothing from `acp-agent.ts`. - The `acp-client.ts` comment that names where `ClientConnection` lives now points to the new file. - Emitted JS differs from `main` only in `dist/v1/acp-agent.js` (the import and the two classes) plus the new `dist/v1/client-connection.js`. Review with `git diff --color-moved` to see the move.	2026-11-10 17:54:17 +01:00
acp-release-bot[bot]	6b86f7b46a	chore(main): release 0.104.1 (#1575 ) 🤖 I have created a release beep boop --- ## [0.104.1](https://github.com/agentclientprotocol/claude-agent-acp/compare/v0.104.0...v0.104.1) (2026-11-10) ### Bug Fixes * carry the auth detail in the ACP account label ([#1573](https://github.com/agentclientprotocol/claude-agent-acp/issues/1573)) ([`3d6eb7b`](`3d6eb7b5b6`)) * distinguish Ultra from Max in auth status ([#1574](https://github.com/agentclientprotocol/claude-agent-acp/issues/1574)) ([`7d95d30`](`7d95d30ec3`)) * update to @anthropic-ai/claude-agent-sdk 0.3.322 ([#1577](https://github.com/agentclientprotocol/claude-agent-acp/issues/1577)) ([`b89e449`](`b89e4497da`)) --- This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please). Co-authored-by: acp-release-bot[bot] <246668977+acp-release-bot[bot]@users.noreply.github.com>	2026-11-10 14:48:59 +01:00
Ben Brandt	b89e4497da	fix: update to @anthropic-ai/claude-agent-sdk 0.3.322 (#1577 ) - Bumps `@anthropic-ai/claude-agent-sdk` 0.3.321 → 0.3.322. - Runs `npm update` for in-range lockfile bumps: `rolldown` 1.2.16 → 1.2.18, `vite` 6.2.16 → 6.2.17, `express-rate-limit` 8.3.6 → 8.3.7, `jose` 8.7.3 → 8.7.4. TypeScript stays at 6.0.3: 7.0.2 is out, but the latest `@typescript-eslint/parser` (8.72.2) requires `typescript <6.1.0`. `npm run build`, `npm run check` and `npm run test:run` pass locally. One test failed once after `npm update` (not captured); four later full runs all passed, so it looks flaky.	2026-11-10 14:41:44 +01:00
Ben Brandt	7d95d30ec3	fix: distinguish Ultra from Max in auth status (#1574 ) ## Summary - Read the optional `planTier` field from the existing `claude auth status --json` probe. Display Max subscriptions with `max_20x` as Claude Ultra, while `max_5x` remains Claude Max. - Fall back to the existing subscription label when the tier is missing, unknown, or malformed. Preserve auth-source precedence and raw plan metadata. - Keep the CLI-derived label when a session SDK account read reports the same identity and plan without a tier. A fresh CLI probe can still replace the label, including when its tier is absent. - Cover ACP v1 and v2 notifications and responses, and document the display behavior. The SDK AccountInfo omits the plan tier, but the bundled CLI already emits it in auth-status JSON. This uses that CLI-only field as best-effort display metadata, without additional probes, direct credential-file reads, or entitlement checks. ## Validation - `npm run build` - `npm run check` - `npm run test:run` — 4,002 passed, 33 skipped - Targeted v1 auth-status and v2 protocol tests — 341 passed - Local bundled CLI smoke check: `subscriptionType: "max"`, `planTier: "max_20x"` maps to `Claude Ultra` - Live model integration tests were not run.	2026-11-10 13:25:20 +00:00
Ben Brandt	3d6eb7b5b6	fix: carry the auth detail in the ACP account label (#1573 ) ## Summary The ACP `auth/status` account (`label`, `active`, `name`, `email`, `organization`) has no field for the identity's `detail`: an API key's source, a gateway's host, or "OAuth token". It was only in `_meta.claudeCode.detail`, so a client that shows the standard fields could not tell which API key or gateway is in use. `toAcpAuthStatus` now appends the detail to the account's `label` in parentheses: - `Anthropic API key (ANTHROPIC_API_KEY)` - `Custom model gateway (gw.example.com)` - `Claude subscription (OAuth token)` An identity without a detail keeps its label as it was (`Claude Max`). ## Unchanged - `_meta.claudeCode` still carries `kind`, `detail` and `plan` on their own. - The `_auth/status_update` extension payload (`label` and `detail` as separate fields). - The mapping is shared, so v1 and v2 report the same label in `auth/status` and `auth/status_update`. ## Testing - `src/tests/v1/auth-status.test.ts` expectations updated for the API key and gateway labels. - `npm run test:run`, `npm run check` and `npm run build` pass.	2026-11-10 14:21:33 +01:00