chore(main): release 0.38.0 (#715 )

🤖 I have created a release *beep* *boop* --- ## [0.38.0](https://github.com/agentclientprotocol/claude-agent-acp/compare/v0.37.0...v0.38.0) (2026-05-28) ### Features * **deps:** bump to @anthropic-ai/claude-agent-sdk 0.3.154 (Opus 4.8) ([#716](https://github.com/agentclientprotocol/claude-agent-acp/issues/716)) ([a172885](a172885c80)) * Support Opus 4.8 ([#718](https://github.com/agentclientprotocol/claude-agent-acp/issues/718)) ([98b54a0](98b54a02c2)) ### Bug Fixes * Remove hide Claude auth flag handling ([#707](https://github.com/agentclientprotocol/claude-agent-acp/issues/707)) ([7ed1daf](7ed1daf7b4)) --- 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>
feat: Support Opus 4.8 (#718 )
2026-11-09 02:42:27 +00:00 · 2026-05-28 22:08:38 +02:00 · 2026-05-28 22:05:59 +02:00 · 2026-05-28 21:54:17 +02:00 · 2026-05-27 22:49:45 +02:00 · 2026-05-24 06:11:51 +00:00
8 changed files with 279 additions and 237 deletions
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.37.0"
+  ".": "0.38.0"
 }
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,18 @@
 # Changelog

+## [0.38.0](https://github.com/agentclientprotocol/claude-agent-acp/compare/v0.37.0...v0.38.0) (2026-05-28)
+
+
+### Features
+
+* **deps:** bump to @anthropic-ai/claude-agent-sdk 0.3.154 (Opus 4.8) ([#716](https://github.com/agentclientprotocol/claude-agent-acp/issues/716)) ([a172885](https://github.com/agentclientprotocol/claude-agent-acp/commit/a172885c80fc32c108a8501268a543641088f543))
+* Support Opus 4.8 ([#718](https://github.com/agentclientprotocol/claude-agent-acp/issues/718)) ([98b54a0](https://github.com/agentclientprotocol/claude-agent-acp/commit/98b54a02c267cdef619becceccf6ef519fbf8f6f))
+
+
+### Bug Fixes
+
+* Remove hide Claude auth flag handling ([#707](https://github.com/agentclientprotocol/claude-agent-acp/issues/707)) ([7ed1daf](https://github.com/agentclientprotocol/claude-agent-acp/commit/7ed1daf7b42088ad149e9bf742f764752b82d093))
+
 ## [0.37.0](https://github.com/agentclientprotocol/claude-agent-acp/compare/v0.36.1...v0.37.0) (2026-05-21)


--- a/package-lock.json
+++ b/package-lock.json
@@ -1,27 +1,27 @@
 {
  "name": "@agentclientprotocol/claude-agent-acp",
-  "version": "0.37.0",
+  "version": "0.38.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
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      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "@typescript-eslint/tsconfig-utils": "^8.59.4",
-        "@typescript-eslint/types": "^8.59.4",
+        "@typescript-eslint/tsconfig-utils": "^8.60.0",
+        "@typescript-eslint/types": "^8.60.0",
        "debug": "^4.4.3"
      },
      "engines": {
@@ -979,14 +1009,14 @@
      }
    },
    "node_modules/@typescript-eslint/scope-manager": {
-      "version": "8.59.4",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-8.59.4.tgz",
-      "integrity": "sha512-mUeR/3H1WrTAddJrwut8OoPjfauaztMQmRwV5fQTUyNVJCLiUXXe4lGEyYIL2oFDpP7UtgbGJXCt72wT0z2S3Q==",
+      "version": "8.60.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-8.60.0.tgz",
+      "integrity": "sha512-pFzqhllJMs+jghLQWzV00ds39xLzuyqPSev5pd8f4Ir0rtKR3ZLUB4/4dhjOFighWb9larvtfJvqL+4yKDI3Xw==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "@typescript-eslint/types": "8.59.4",
-        "@typescript-eslint/visitor-keys": "8.59.4"
+        "@typescript-eslint/types": "8.60.0",
+        "@typescript-eslint/visitor-keys": "8.60.0"
      },
      "engines": {
        "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
@@ -997,9 +1027,9 @@
      }
    },
    "node_modules/@typescript-eslint/tsconfig-utils": {
-      "version": "8.59.4",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.59.4.tgz",
-      "integrity": "sha512-DLCpnKgD4alVxTBSKulK+gU1KCqOgUXfDRDXh2mZgzokQKa/70ax93I2uVO3m/LLvIAtWZIFoiifudmIqAxpMA==",
+      "version": "8.60.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.60.0.tgz",
+      "integrity": "sha512-BZPR3RGYlAXnly6ymAxfkVn5rCbZzQNou0rxv3GfWZ8cTQp+hhVd73khbGLAd8k1TlAPLISH337M+tAgAnaJDQ==",
      "dev": true,
      "license": "MIT",
      "engines": {
@@ -1014,15 +1044,15 @@
      }
    },
    "node_modules/@typescript-eslint/type-utils": {
-      "version": "8.59.4",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/type-utils/-/type-utils-8.59.4.tgz",
-      "integrity": "sha512-uonTuPAAKr9XaBGqJ3LjYTh72zy5DyGesljO9gtmk/eFW0W1fRHjnwVYKB35Lm8d5Q5CluEW3gPHjTvZTmgrfA==",
+      "version": "8.60.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/type-utils/-/type-utils-8.60.0.tgz",
+      "integrity": "sha512-SX46wEUtitCpq7AN38HkUU/+zvUpdKf7ephtWAFgckH8O7PQIyL5gvrhQgBLuEYgLfuKWOVvWVskMbuFHAz5xg==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "@typescript-eslint/types": "8.59.4",
-        "@typescript-eslint/typescript-estree": "8.59.4",
-        "@typescript-eslint/utils": "8.59.4",
+        "@typescript-eslint/types": "8.60.0",
+        "@typescript-eslint/typescript-estree": "8.60.0",
+        "@typescript-eslint/utils": "8.60.0",
        "debug": "^4.4.3",
        "ts-api-utils": "^2.5.0"
      },
@@ -1039,9 +1069,9 @@
      }
    },
    "node_modules/@typescript-eslint/types": {
-      "version": "8.59.4",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-8.59.4.tgz",
-      "integrity": "sha512-F1o7WJcCq+bc8dwcO/YsSEOudAH8RDtaOhM6wcAQhcUsFhnWQl81JKy48q1hoxAU0qrzM89+31GYh1515Zde3Q==",
+      "version": "8.60.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-8.60.0.tgz",
+      "integrity": "sha512-AsE7x2XaAK+CVbeih0Fvbn+r1qHxtpLDJ3XUuFcIinT318T90yHMJC+Zgv+jUuDjQQd06HKwxnDu6sz1IcTilA==",
      "dev": true,
      "license": "MIT",
      "engines": {
@@ -1053,16 +1083,16 @@
      }
    },
    "node_modules/@typescript-eslint/typescript-estree": {
-      "version": "8.59.4",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-8.59.4.tgz",
-      "integrity": "sha512-F+RuOmcDXo4+TPdfd/TCLS3m2nw8gE9XXyZLrA3JBfaA5tz9TtdkyD3YJFmPxulyc2cKbEok/CvFE3MgSLWnag==",
+      "version": "8.60.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-8.60.0.tgz",
+      "integrity": "sha512-3AcZNBGMClm6CXDyo8kYvVGT/sx29sS0oBsIb9oZI2gunA4Vm2M3YHzRLPvsUBBsl+yB5FPtltq7gGH0iTlp9g==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "@typescript-eslint/project-service": "8.59.4",
-        "@typescript-eslint/tsconfig-utils": "8.59.4",
-        "@typescript-eslint/types": "8.59.4",
-        "@typescript-eslint/visitor-keys": "8.59.4",
+        "@typescript-eslint/project-service": "8.60.0",
+        "@typescript-eslint/tsconfig-utils": "8.60.0",
+        "@typescript-eslint/types": "8.60.0",
+        "@typescript-eslint/visitor-keys": "8.60.0",
        "debug": "^4.4.3",
        "minimatch": "^10.2.2",
        "semver": "^7.7.3",
@@ -1081,16 +1111,16 @@
      }
    },
    "node_modules/@typescript-eslint/utils": {
-      "version": "8.59.4",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/utils/-/utils-8.59.4.tgz",
-      "integrity": "sha512-cYXeNAUsG4lJo5dbc1FcKm+JwIWrj1/UpTORsC6tGMjEZ81DYcvIr9/ueikhMa/Y/gDQYGp+YX9/xQrXje5BJw==",
+      "version": "8.60.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/utils/-/utils-8.60.0.tgz",
+      "integrity": "sha512-HtXuPfrHTyBDkameWpl+vJb1Uevu2tznAyahM1Oc4AENidCLTPiZDWIo4GfcxNdC/RcfGcadzzkqbRG87dUrQA==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
        "@eslint-community/eslint-utils": "^4.9.1",
-        "@typescript-eslint/scope-manager": "8.59.4",
-        "@typescript-eslint/types": "8.59.4",
-        "@typescript-eslint/typescript-estree": "8.59.4"
+        "@typescript-eslint/scope-manager": "8.60.0",
+        "@typescript-eslint/types": "8.60.0",
+        "@typescript-eslint/typescript-estree": "8.60.0"
      },
      "engines": {
        "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
@@ -1105,13 +1135,13 @@
      }
    },
    "node_modules/@typescript-eslint/visitor-keys": {
-      "version": "8.59.4",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-8.59.4.tgz",
-      "integrity": "sha512-U3gxVaDVnuZKhSspW/MzMxE1kq7zOdc072FcSNoqA1I9p8HyKbBFfEHoWckBAMgNMph4MamwS5iTVzFmrnt8TQ==",
+      "version": "8.60.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-8.60.0.tgz",
+      "integrity": "sha512-9WI52t8ZGLVGrPMBet25yAftqY/n95+zmoUUtJBBQTKDSKUu7OsPTroT2op7U9JatkoRccL0YkWDNMFfC4Sjxg==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "@typescript-eslint/types": "8.59.4",
+        "@typescript-eslint/types": "8.60.0",
        "eslint-visitor-keys": "^5.0.0"
      },
      "engines": {
@@ -1653,9 +1683,9 @@
      "license": "MIT"
    },
    "node_modules/es-object-atoms": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/es-object-atoms/-/es-object-atoms-1.1.1.tgz",
-      "integrity": "sha512-FGgH2h8zKNim9ljj7dankFPcICIK9Cp5bm+c2gQSYePhpaG5+esrLODihIorn+Pe6FGJzWhXQotPv73jTaldXA==",
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/es-object-atoms/-/es-object-atoms-1.1.2.tgz",
+      "integrity": "sha512-HWcBoN6NileqtSydK2FqHbS/LoDd2pqrnQHLyJzBj4kOp/ky2MWMN694xOfkK8/SnUsW2DH7EfyVlydKCsm1Zw==",
      "license": "MIT",
      "peer": true,
      "dependencies": {
@@ -1947,9 +1977,9 @@
      }
    },
    "node_modules/eventsource-parser": {
-      "version": "3.0.8",
-      "resolved": "https://registry.npmjs.org/eventsource-parser/-/eventsource-parser-3.0.8.tgz",
-      "integrity": "sha512-70QWGkr4snxr0OXLRWsFLeRBIRPuQOvt4s8QYjmUlmlkyTZkRqS7EDVRZtzU3TiyDbXSzaOeF0XUKy8PchzukQ==",
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/eventsource-parser/-/eventsource-parser-3.1.0.tgz",
+      "integrity": "sha512-kJezFj9YFAMLeORyi7aCLxLbD5/qWMQnoMVlVPyHIll7lgRJCc3JVln9Vgl9nwQi0YkMnhdGTMNn7CkRRAptMg==",
      "license": "MIT",
      "peer": true,
      "engines": {
@@ -2300,9 +2330,9 @@
      }
    },
    "node_modules/hasown": {
-      "version": "2.0.3",
-      "resolved": "https://registry.npmjs.org/hasown/-/hasown-2.0.3.tgz",
-      "integrity": "sha512-ej4AhfhfL2Q2zpMmLo7U1Uv9+PyhIZpgQLGT1F9miIGmiCJIoCgSmczFdrc97mWT4kVY72KA+WnnhJ5pghSvSg==",
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/hasown/-/hasown-2.0.4.tgz",
+      "integrity": "sha512-T2UbfbBEF32wiepXIsMlTW9+dDYC6wMh/t/vYA4tuOMKqWz/n3vr1NFSxQiyP+zk2mXsoMA/i/7qV6LKut1t1A==",
      "license": "MIT",
      "peer": true,
      "dependencies": {
@@ -2313,9 +2343,9 @@
      }
    },
    "node_modules/hono": {
-      "version": "4.12.21",
-      "resolved": "https://registry.npmjs.org/hono/-/hono-4.12.21.tgz",
-      "integrity": "sha512-uV63apnb0kyPtAUwoWgaGh9HyIFcv8lgmzPZSiTBQAFOFGIzka5EZ1dZocmGnn0XdX0+XTqJ6Tqv7selMuGLRQ==",
+      "version": "4.12.23",
+      "resolved": "https://registry.npmjs.org/hono/-/hono-4.12.23.tgz",
+      "integrity": "sha512-eIaZ9qDgu7XV0pxOCrg7/WhnQ6Ivm22UcxhXx/A3dcbqbbYgBEkc6e/J/s7j2tS96zoB0S9VBdLwQNCWwUo4LA==",
      "license": "MIT",
      "peer": true,
      "engines": {
@@ -2661,6 +2691,9 @@
        "arm64"
      ],
      "dev": true,
+      "libc": [
+        "glibc"
+      ],
      "license": "MPL-2.0",
      "optional": true,
      "os": [
@@ -2682,6 +2715,9 @@
        "arm64"
      ],
      "dev": true,
+      "libc": [
+        "musl"
+      ],
      "license": "MPL-2.0",
      "optional": true,
      "os": [
@@ -2703,6 +2739,9 @@
        "x64"
      ],
      "dev": true,
+      "libc": [
+        "glibc"
+      ],
      "license": "MPL-2.0",
      "optional": true,
      "os": [
@@ -2724,6 +2763,9 @@
        "x64"
      ],
      "dev": true,
+      "libc": [
+        "musl"
+      ],
      "license": "MPL-2.0",
      "optional": true,
      "os": [
@@ -3304,9 +3346,9 @@
      "peer": true
    },
    "node_modules/semver": {
-      "version": "7.8.0",
-      "resolved": "https://registry.npmjs.org/semver/-/semver-7.8.0.tgz",
-      "integrity": "sha512-AcM7dV/5ul4EekoQ29Agm5vri8JNqRyj39o0qpX6vDF2GZrtutZl5RwgD1XnZjiTAfncsJhMI48QQH3sN87YNA==",
+      "version": "7.8.1",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.8.1.tgz",
+      "integrity": "sha512-rkVq3IXh+4FDGch+KwzX3aV9W3kO54GyEgpvBzSyctDA6Xtd7RJQV1xmXbeQp5v7+VzLOfVqiutSE6GICgPFvg==",
      "dev": true,
      "license": "ISC",
      "bin": {
@@ -3526,9 +3568,9 @@
      "license": "MIT"
    },
    "node_modules/tinyexec": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/tinyexec/-/tinyexec-1.1.2.tgz",
-      "integrity": "sha512-dAqSqE/RabpBKI8+h26GfLq6Vb3JVXs30XYQjdMjaj/c2tS8IYYMbIzP599KtRj7c57/wYApb3QjgRgXmrCukA==",
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/tinyexec/-/tinyexec-1.2.2.tgz",
+      "integrity": "sha512-M/Q0B2cp4K7kynaT/vnED1j8TlLY+Pp7C6Wl2bl/7u/F0mUVwdyOpwomQb8JpYLitHUssAJRmLZdMCGsrx7i+g==",
      "dev": true,
      "license": "MIT",
      "engines": {
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
  "publishConfig": {
    "access": "public"
  },
-  "version": "0.37.0",
+  "version": "0.38.0",
  "description": "An ACP-compatible coding agent powered by the Claude Agent SDK (TypeScript)",
  "main": "dist/lib.js",
  "types": "dist/lib.d.ts",
@@ -61,15 +61,15 @@
  "license": "Apache-2.0",
  "dependencies": {
    "@agentclientprotocol/sdk": "0.22.1",
-    "@anthropic-ai/claude-agent-sdk": "0.3.146",
+    "@anthropic-ai/claude-agent-sdk": "0.3.154",
    "zod": "^3.25.0 || ^4.0.0"
  },
  "devDependencies": {
-    "@anthropic-ai/sdk": "0.97.1",
+    "@anthropic-ai/sdk": "0.100.0",
    "@eslint/js": "10.0.1",
    "@types/node": "25.9.1",
-    "@typescript-eslint/eslint-plugin": "8.59.4",
-    "@typescript-eslint/parser": "8.59.4",
+    "@typescript-eslint/eslint-plugin": "8.60.0",
+    "@typescript-eslint/parser": "8.60.0",
    "eslint": "10.4.0",
    "eslint-config-prettier": "10.1.8",
    "globals": "17.6.0",
--- a/src/acp-agent.ts
+++ b/src/acp-agent.ts
@@ -330,10 +330,6 @@ function isMuslLibc(): boolean {
  return !report?.header?.glibcVersionRuntime;
 }

-function shouldHideClaudeAuth(): boolean {
-  return process.argv.includes("--hide-claude-auth");
-}
-
 // Bypass Permissions doesn't work if we are a root/sudo user
 const IS_ROOT = (process.geteuid?.() ?? process.getuid?.()) === 0;
 const ALLOW_BYPASS = !IS_ROOT || !!process.env.IS_SANDBOX;
@@ -564,7 +560,7 @@ export class ClaudeAcpAgent implements Agent {
        };
      }

-      if (!shouldHideClaudeAuth() && (supportsTerminalAuth || supportsMetaTerminalAuth)) {
+      if (supportsTerminalAuth || supportsMetaTerminalAuth) {
        terminalAuthMethods.push(remoteLoginMethod);
      }
    } else {
@@ -602,10 +598,8 @@ export class ClaudeAcpAgent implements Agent {
        };
      }

-      if (!shouldHideClaudeAuth() && (supportsTerminalAuth || supportsMetaTerminalAuth)) {
-        terminalAuthMethods.push(claudeLoginMethod);
-      }
      if (supportsTerminalAuth || supportsMetaTerminalAuth) {
+        terminalAuthMethods.push(claudeLoginMethod);
        terminalAuthMethods.push(consoleLoginMethod);
      }
    }
@@ -753,6 +747,13 @@ export class ClaudeAcpAgent implements Agent {
    // forward it to clients as structured `data`, sparing them from
    // pattern-matching on the human-readable message text.
    let lastAssistantError: SDKAssistantMessageError | undefined;
+    // Tracks whether we're inside a compaction. The SDK emits the terminal
+    // `status` (compact_result success/failed) twice for a single failed
+    // compaction, and the two messages are indistinguishable — so we report the
+    // outcome only while a compaction is in progress, then clear this. A fresh
+    // `compacting` status sets it again, so every distinct compaction (e.g.
+    // repeated auto-compactions in a long turn) is still shown.
+    let compactionInProgress = false;

    const userMessage = promptToClaude(params);

@@ -812,6 +813,7 @@ export class ClaudeAcpAgent implements Agent {
                break;
              case "status": {
                if (message.status === "compacting") {
+                  compactionInProgress = true;
                  await this.client.sessionUpdate({
                    sessionId: message.session_id,
                    update: {
@@ -819,6 +821,28 @@ export class ClaudeAcpAgent implements Agent {
                      content: { type: "text", text: "Compacting..." },
                    },
                  });
+                } else if (message.compact_result === "success" && compactionInProgress) {
+                  // The SDK signals manual `/compact` completion with a status
+                  // message carrying `compact_result`, not the `compact_boundary`
+                  // message (which only fires when there's content to compact).
+                  compactionInProgress = false;
+                  await this.client.sessionUpdate({
+                    sessionId: message.session_id,
+                    update: {
+                      sessionUpdate: "agent_message_chunk",
+                      content: { type: "text", text: "\n\nCompacting completed." },
+                    },
+                  });
+                } else if (message.compact_result === "failed" && compactionInProgress) {
+                  compactionInProgress = false;
+                  const reason = message.compact_error ? `: ${message.compact_error}` : ".";
+                  await this.client.sessionUpdate({
+                    sessionId: message.session_id,
+                    update: {
+                      sessionUpdate: "agent_message_chunk",
+                      content: { type: "text", text: `\n\nCompacting failed${reason}` },
+                    },
+                  });
                }
                break;
              }
@@ -834,6 +858,10 @@ export class ClaudeAcpAgent implements Agent {
                // The alternative (no update) leaves the client showing e.g.
                // "944k/1m" right after the user sees "Compacting completed",
                // which is confusing and wrong.
+                //
+                // The "Compacting completed." text is emitted from the `status`
+                // handler (keyed on `compact_result`), not here, so the failure
+                // path gets a message too.
                lastAssistantTotalUsage = 0;
                lastAssistantUsage = null;
                await this.client.sessionUpdate({
@@ -844,13 +872,6 @@ export class ClaudeAcpAgent implements Agent {
                    size: session.contextWindowSize,
                  },
                });
-                await this.client.sessionUpdate({
-                  sessionId: message.session_id,
-                  update: {
-                    sessionUpdate: "agent_message_chunk",
-                    content: { type: "text", text: "\n\nCompacting completed." },
-                  },
-                });
                break;
              }
              case "local_command_output": {
@@ -926,6 +947,7 @@ export class ClaudeAcpAgent implements Agent {
              case "api_retry":
              case "mirror_error":
              case "permission_denied":
+              case "thinking_tokens":
                // Todo: process via status api: https://docs.claude.com/en/docs/claude-code/hooks#hook-output
                break;
              default:
@@ -1171,6 +1193,7 @@ export class ClaudeAcpAgent implements Agent {
            // payloads (e.g. /compact's malformed output) strip to null and are
            // skipped. Mirrors the replay path at replaySessionHistory.
            if (
+              message.message.role !== "system" &&
              typeof message.message.content === "string" &&
              message.message.content.includes("<local-command-stdout>")
            ) {
@@ -1215,6 +1238,9 @@ export class ClaudeAcpAgent implements Agent {
            ) {
              break;
            }
+            if (message.message.role === "system") {
+              break;
+            }

            if (
              message.type === "assistant" &&
@@ -2145,17 +2171,6 @@ export class ClaudeAcpAgent implements Agent {
      throw error;
    }

-    if (
-      shouldHideClaudeAuth() &&
-      initializationResult.account.subscriptionType &&
-      !this.gatewayAuthRequest
-    ) {
-      throw RequestError.authRequired(
-        undefined,
-        "This integration does not support using claude.ai subscriptions.",
-      );
-    }
-
    // Apply user's `availableModels` allowlist from settings.json before any
    // downstream model handling. The SDK only enforces this allowlist in its
    // own UI, not in `initializationResult.models`, so we filter here to keep
@@ -3140,6 +3155,7 @@ export function toAcpNotifications(
      case "compaction":
      case "compaction_delta":
      case "advisor_tool_result":
+      case "mid_conv_system":
        break;

      default:
@@ -3207,7 +3223,11 @@ export function streamEventToAcpNotifications(
          taskState: options?.taskState,
        },
      );
-    // No content
+    // No content. `ping` is a Messages-API keep-alive event that the SDK's
+    // `BetaRawMessageStreamEvent` union doesn't include even though the
+    // wire format emits it; the `as never` cast lets us no-op it here
+    // instead of letting it fall through to `unreachable`.
+    case "ping" as never:
    case "message_start":
    case "message_delta":
    case "message_stop":
--- a/src/tests/.claude/commands/say-hello.md
+++ b/src/tests/.claude/commands/say-hello.md
@@ -3,4 +3,4 @@ description: Say hello
 argument-hint: name
 ---

-Respond with "Hello $1" and nothing else.
+Respond with "Hello $ARGUMENTS" and nothing else.
--- a/src/tests/acp-agent.test.ts
+++ b/src/tests/acp-agent.test.ts
@@ -32,6 +32,7 @@ import {
  ClaudeAcpAgent,
  claudeCliPath,
  describeAlwaysAllow,
+  streamEventToAcpNotifications,
  type SDKMessageFilter,
 } from "../acp-agent.js";
 import { Pushable } from "../utils.js";
@@ -238,13 +239,15 @@ describe.skipIf(!process.env.RUN_INTEGRATION_TESTS)("ACP subprocess integration"
      name: "compact",
    });

-    // Send something
-    await connection.prompt({
-      prompt: [{ type: "text", text: "Hi" }],
-      sessionId: newSessionResponse.sessionId,
-    });
-    // Clear response
-    client.takeReceivedText();
+    // Build up enough conversation that there's something to compact. The SDK
+    // refuses to compact a conversation with too few message groups.
+    for (let i = 0; i < 6; i++) {
+      await connection.prompt({
+        prompt: [{ type: "text", text: `Reply with just the number ${i}.` }],
+        sessionId: newSessionResponse.sessionId,
+      });
+      client.takeReceivedText();
+    }

    await connection.prompt({
      prompt: [
@@ -257,7 +260,7 @@ describe.skipIf(!process.env.RUN_INTEGRATION_TESTS)("ACP subprocess integration"
    });

    expect(client.takeReceivedText()).toContain("Compacting...\n\nCompacting completed.");
-  }, 30000);
+  }, 60000);
 });

 describe("tool conversions", () => {
@@ -662,6 +665,7 @@ describe("tool conversions", () => {
          server_tool_use: null,
          inference_geo: null,
          iterations: null,
+          output_tokens_details: null,
          speed: null,
        },
        context_management: null,
@@ -3872,3 +3876,38 @@ describe("post-error recovery", () => {
    expect(session.pendingMessages.size).toBe(0);
  });
 });
+
+describe("streamEventToAcpNotifications", () => {
+  it("treats `ping` keep-alive events as no-ops without logging to stderr", () => {
+    const errors: unknown[][] = [];
+    const logger = {
+      log: () => {},
+      error: (...args: unknown[]) => {
+        errors.push(args);
+      },
+    };
+    const pingMessage = {
+      type: "stream_event",
+      parent_tool_use_id: null,
+      uuid: randomUUID(),
+      session_id: "test-session",
+      // The SDK's typed `BetaRawMessageStreamEvent` union doesn't include
+      // `ping`, but the API emits it on the wire and the SDK passes it
+      // through. Cast through `unknown` to feed the realistic runtime shape.
+      event: { type: "ping" } as unknown,
+    } as Parameters<typeof streamEventToAcpNotifications>[0];
+
+    const result = streamEventToAcpNotifications(
+      pingMessage,
+      "test-session",
+      {},
+      { sessionUpdate: async () => {} } as unknown as Parameters<
+        typeof streamEventToAcpNotifications
+      >[3],
+      logger,
+    );
+
+    expect(result).toEqual([]);
+    expect(errors).toEqual([]);
+  });
+});
--- a/src/tests/authorization.test.ts
+++ b/src/tests/authorization.test.ts
@@ -15,7 +15,10 @@ const mockQuery = vi.hoisted(() =>
  })),
 );

-vi.mock("@anthropic-ai/claude-agent-sdk", () => ({
+vi.mock("@anthropic-ai/claude-agent-sdk", async () => ({
+  ...(await vi.importActual<typeof import("@anthropic-ai/claude-agent-sdk")>(
+    "@anthropic-ai/claude-agent-sdk",
+  )),
  query: mockQuery,
 }));

@@ -163,63 +166,6 @@ describe("authorization", () => {
    );
  });

-  it("hide claude authentication without terminal-auth", async () => {
-    const [agent] = await createAgentMock();
-    vi.stubGlobal("process", { ...process, argv: ["--hide-claude-auth"] });
-
-    const initializeResponse = await agent.initialize({
-      protocolVersion: 1,
-      clientCapabilities: {
-        auth: { _meta: { gateway: true } },
-      } as any,
-    });
-    expect(initializeResponse.authMethods).not.toContainEqual(
-      expect.objectContaining({ id: "claude-ai-login" }),
-    );
-    expect(initializeResponse.authMethods).not.toContainEqual(
-      expect.objectContaining({ id: "console-login" }),
-    );
-    expect(initializeResponse.authMethods).toContainEqual(
-      expect.objectContaining({ id: "gateway" }),
-    );
-  });
-
-  it("hide claude auth but still show console login when terminal-auth is set", async () => {
-    const [agent] = await createAgentMock();
-    vi.stubGlobal("process", { ...process, argv: ["--hide-claude-auth"] });
-
-    const initializeResponse = await agent.initialize({
-      protocolVersion: 1,
-      clientCapabilities: {
-        _meta: { "terminal-auth": true },
-      },
-    });
-    expect(initializeResponse.authMethods).not.toContainEqual(
-      expect.objectContaining({ id: "claude-ai-login" }),
-    );
-    expect(initializeResponse.authMethods).toContainEqual(
-      expect.objectContaining({ id: "console-login" }),
-    );
-  });
-
-  it("hide claude auth but still show console login with terminal capability", async () => {
-    const [agent] = await createAgentMock();
-    vi.stubGlobal("process", { ...process, argv: ["--hide-claude-auth"] });
-
-    const initializeResponse = await agent.initialize({
-      protocolVersion: 1,
-      clientCapabilities: {
-        auth: { terminal: true },
-      },
-    });
-    expect(initializeResponse.authMethods).not.toContainEqual(
-      expect.objectContaining({ id: "claude-ai-login" }),
-    );
-    expect(initializeResponse.authMethods).toContainEqual(
-      expect.objectContaining({ id: "console-login" }),
-    );
-  });
-
  it("SSH session falls back to single legacy login method", async () => {
    const [agent] = await createAgentMock();
    vi.stubGlobal("process", { ...process, env: { ...process.env, SSH_TTY: "/dev/pts/0" } });
@@ -260,24 +206,6 @@ describe("authorization", () => {
    );
  });

-  it("remote environment respects hide-claude-auth", async () => {
-    const [agent] = await createAgentMock();
-    vi.stubGlobal("process", {
-      ...process,
-      argv: ["--hide-claude-auth"],
-      env: { ...process.env, SSH_CONNECTION: "192.168.1.1 12345 192.168.1.2 22" },
-    });
-
-    const initializeResponse = await agent.initialize({
-      protocolVersion: 1,
-      clientCapabilities: { auth: { terminal: true } },
-    });
-
-    expect(initializeResponse.authMethods).not.toContainEqual(
-      expect.objectContaining({ id: "claude-login" }),
-    );
-  });
-
  it("show claude authentication", async () => {
    const [agent] = await createAgentMock();