chore(main): release 0.86.0 (#1225)

🤖 I have created a release *beep* *boop*
---


##
[0.86.0](https://github.com/agentclientprotocol/claude-agent-acp/compare/v0.85.1...v0.86.0)
(2026-10-05)


### Features

* answer /mcp in chat with the MCP server status and a reconnect
([#1218](https://github.com/agentclientprotocol/claude-agent-acp/issues/1218))
([190a00f](190a00f68f))
* **deps:** Bump @anthropic-ai/claude-agent-sdk to 0.3.287
([#1224](https://github.com/agentclientprotocol/claude-agent-acp/issues/1224))
([ddd5f54](ddd5f54187))


### Bug Fixes

* count a subagent's permission requests as the turn waiting on the user
([#1241](https://github.com/agentclientprotocol/claude-agent-acp/issues/1241))
([d599333](d599333b72))
* drop queued prompts a cancel ends from Claude Code's queue
([#1228](https://github.com/agentclientprotocol/claude-agent-acp/issues/1228))
([d83f28a](d83f28a403))
* end a cancelled turn when the force-cancel fires during an update
([#1243](https://github.com/agentclientprotocol/claude-agent-acp/issues/1243))
([a44c486](a44c486019))
* end a closed session's turns before session/close answers
([#1242](https://github.com/agentclientprotocol/claude-agent-acp/issues/1242))
([b1d6cfc](b1d6cfc6c9))
* end a held turn cancelled mid-followup at its interrupt's idle
([#1229](https://github.com/agentclientprotocol/claude-agent-acp/issues/1229))
([d3e673b](d3e673b263))
* excessive message/token_count API calls when probing context window
([#1258](https://github.com/agentclientprotocol/claude-agent-acp/issues/1258))
([5598efb](5598efbc8a))
* replay a session with a Write on the experimental ACP v2 surface
([#1238](https://github.com/agentclientprotocol/claude-agent-acp/issues/1238))
([22139f7](22139f73c4))
* report a command's exit code only when the tool result says it
([#1252](https://github.com/agentclientprotocol/claude-agent-acp/issues/1252))
([52a92be](52a92be959))
* restore main-thread agent config option
([#1250](https://github.com/agentclientprotocol/claude-agent-acp/issues/1250))
([8589a9c](8589a9cf15))

---
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>

.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "0.85.1"
+  ".": "0.86.0"
 }

CHANGELOG.md

@@ -1,5 +1,26 @@
 # Changelog
 
+## [0.86.0](https://github.com/agentclientprotocol/claude-agent-acp/compare/v0.85.1...v0.86.0) (2026-10-05)
+
+
+### Features
+
+* answer /mcp in chat with the MCP server status and a reconnect ([#1218](https://github.com/agentclientprotocol/claude-agent-acp/issues/1218)) ([190a00f](https://github.com/agentclientprotocol/claude-agent-acp/commit/190a00f68f773315e93630464397944e645616ff))
+* **deps:** Bump @anthropic-ai/claude-agent-sdk to 0.3.287 ([#1224](https://github.com/agentclientprotocol/claude-agent-acp/issues/1224)) ([ddd5f54](https://github.com/agentclientprotocol/claude-agent-acp/commit/ddd5f541879118edb18df7ff09cd6682d455c710))
+
+
+### Bug Fixes
+
+* count a subagent's permission requests as the turn waiting on the user ([#1241](https://github.com/agentclientprotocol/claude-agent-acp/issues/1241)) ([d599333](https://github.com/agentclientprotocol/claude-agent-acp/commit/d599333b722a951553c0efd40a76559b1f32e6ab))
+* drop queued prompts a cancel ends from Claude Code's queue ([#1228](https://github.com/agentclientprotocol/claude-agent-acp/issues/1228)) ([d83f28a](https://github.com/agentclientprotocol/claude-agent-acp/commit/d83f28a4035c5a5e54950fd58c7b73bfc2313664))
+* end a cancelled turn when the force-cancel fires during an update ([#1243](https://github.com/agentclientprotocol/claude-agent-acp/issues/1243)) ([a44c486](https://github.com/agentclientprotocol/claude-agent-acp/commit/a44c486019e98ad478c549c4902e7092f1418d0b))
+* end a closed session's turns before session/close answers ([#1242](https://github.com/agentclientprotocol/claude-agent-acp/issues/1242)) ([b1d6cfc](https://github.com/agentclientprotocol/claude-agent-acp/commit/b1d6cfc6c9fc9ec397e607b68ac100f4d48745b3))
+* end a held turn cancelled mid-followup at its interrupt's idle ([#1229](https://github.com/agentclientprotocol/claude-agent-acp/issues/1229)) ([d3e673b](https://github.com/agentclientprotocol/claude-agent-acp/commit/d3e673b263cf47603a35a50bb3da8b483199f690))
+* excessive message/token_count API calls when probing context window ([#1258](https://github.com/agentclientprotocol/claude-agent-acp/issues/1258)) ([5598efb](https://github.com/agentclientprotocol/claude-agent-acp/commit/5598efbc8ab16720ea79f5c97db40771ad0b317b))
+* replay a session with a Write on the experimental ACP v2 surface ([#1238](https://github.com/agentclientprotocol/claude-agent-acp/issues/1238)) ([22139f7](https://github.com/agentclientprotocol/claude-agent-acp/commit/22139f73c48e621752089a91fb095269493896b1))
+* report a command's exit code only when the tool result says it ([#1252](https://github.com/agentclientprotocol/claude-agent-acp/issues/1252)) ([52a92be](https://github.com/agentclientprotocol/claude-agent-acp/commit/52a92be959f7f8ea90ab08d54bae6900596ab435))
+* restore main-thread agent config option ([#1250](https://github.com/agentclientprotocol/claude-agent-acp/issues/1250)) ([8589a9c](https://github.com/agentclientprotocol/claude-agent-acp/commit/8589a9cf150d8deca6d2f8ef24404d927b3d4828))
+
 ## [0.85.1](https://github.com/agentclientprotocol/claude-agent-acp/compare/v0.85.0...v0.85.1) (2026-10-01)
 
 

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "@agentclientprotocol/claude-agent-acp",
-  "version": "0.85.1",
+  "version": "0.86.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@agentclientprotocol/claude-agent-acp",
-      "version": "0.85.1",
+      "version": "0.86.0",
       "license": "Apache-2.0",
       "dependencies": {
         "@agentclientprotocol/sdk": "1.7.0",

package.json

@@ -3,7 +3,7 @@
   "publishConfig": {
     "access": "public"
   },
-  "version": "0.85.1",
+  "version": "0.86.0",
   "description": "An ACP-compatible coding agent powered by the Claude Agent SDK (TypeScript)",
   "main": "dist/lib.js",
   "types": "dist/lib.d.ts",

src/acp-agent.ts

@@ -8677,15 +8677,21 @@ export class ClaudeAcpAgent {
   }
 
   /**
-   * Replace a heuristic context window with `getContextUsage().rawMaxTokens`
+   * Refine a heuristic context window with `getContextUsage().rawMaxTokens`,
    * without blocking the caller. The text heuristic misses natively-1M models
-   * whose picker rows carry no "1m" token (`sonnet`, and since CLI 2.1.283
-   * `opus`/`default`), which would otherwise report 200k until the first
-   * result's modelUsage. Never awaited: SDK control requests are serialized,
-   * so an awaited call would delay session/new or a model switch (before the
-   * first turn it took ~15s on older CLIs, issues #886/#880; ~0.5s on 2.1.283).
-   * Not written to `contextWindowCache` — that stays keyed to the
-   * `result.modelUsage` spellings — and a result still overwrites it.
+   * whose picker rows carry no "1m" token (e.g. `sonnet`, and since CLI
+   * 2.1.283 `opus`/`default`), so those would otherwise show 200k until the
+   * first result's modelUsage arrives.
+   *
+   * Never awaited: SDK control requests are serialized, so awaiting here
+   * would delay session/new or a model switch (~15s on older CLIs, issues
+   * #886/#880; ~0.5s on 2.1.283). Requests the `summary` detail instead of
+   * the default `full` breakdown, which issues one `messages/count_tokens`
+   * call per category (~18 for a bare session) and hit rate limits on every
+   * model switch; `summary` answers locally with the same `rawMaxTokens`.
+   *
+   * Does not write `contextWindowCache` (that stays keyed to the
+   * `result.modelUsage` spellings) — a later result still overwrites this.
    */
   private refreshContextWindowInBackground(sessionId: string, session: Session): void {
     if (session.contextWindowAuthoritative) return;
@@ -8697,7 +8703,7 @@ export class ClaudeAcpAgent {
       session.models.currentModelId === modelId;
     // A synchronous throw must not fail the caller either.
     Promise.resolve()
-      .then(() => query.getContextUsage())
+      .then(() => query.getContextUsage({ detail: "summary" }))
       .then(
         (usage) => {
           if (!stillCurrent() || session.contextWindowAuthoritative) return;

src/tests/create-session-options.test.ts

@@ -14,6 +14,7 @@ import * as path from "node:path";
 
 let capturedOptions: Options | undefined;
 let contextUsageResult: (() => Promise<{ rawMaxTokens: number; model?: string }>) | undefined;
+let contextUsageCalls: Array<{ detail?: "summary" | "full" } | undefined> = [];
 let sessionMessages: Record<string, unknown>[];
 let sessionMessagesResult: () => Promise<Record<string, unknown>[]>;
 let initModels: Record<string, unknown>[] | undefined;
@@ -47,8 +48,10 @@ vi.mock("@anthropic-ai/claude-agent-sdk", async () => {
           return initializationResponse();
         },
         setModel: (model: string) => (setModelImpl ? setModelImpl(model) : Promise.resolve()),
-        getContextUsage: () =>
-          contextUsageResult ? contextUsageResult() : Promise.resolve(DEFAULT_CONTEXT_USAGE),
+        getContextUsage: (opts?: { detail?: "summary" | "full" }) => {
+          contextUsageCalls.push(opts);
+          return contextUsageResult ? contextUsageResult() : Promise.resolve(DEFAULT_CONTEXT_USAGE);
+        },
         mcpServerStatus: () => mcpServerStatusResult(),
         mcpAuthenticate: (serverName: string) => mcpAuthenticateImpl(serverName),
       });
@@ -94,6 +97,7 @@ describe("createSession options merging", () => {
   beforeEach(async () => {
     capturedOptions = undefined;
     contextUsageResult = undefined;
+    contextUsageCalls = [];
     sessionMessages = [];
     sessionMessagesResult = async () => sessionMessages;
     vi.mocked(getSessionMessages).mockClear();
@@ -910,6 +914,15 @@ describe("createSession options merging", () => {
       expect(sessionFor(response.sessionId).contextWindowAuthoritative).toBe(true);
     });
 
+    it("asks for the summary context usage so the CLI sends no count_tokens requests", async () => {
+      // The default `full` detail counts each context category with its own
+      // messages/count_tokens request — a burst that hit rate limits on every
+      // model switch — while only `rawMaxTokens` is needed here.
+      await agent.newSession({ cwd: process.cwd(), mcpServers: [] });
+
+      await vi.waitFor(() => expect(contextUsageCalls).toEqual([{ detail: "summary" }]));
+    });
+
     it("keeps the guessed window when getContextUsage reports a non-positive size", async () => {
       const ctxSpy = vi.fn(async () => ({ rawMaxTokens: 0 }));
       contextUsageResult = ctxSpy;

src/tests/session-config-options.test.ts

@@ -1192,6 +1192,7 @@ describe("session config options", () => {
 
       // The switch resolved without waiting for getContextUsage.
       expect(session.query.getContextUsage).toHaveBeenCalledOnce();
+      expect(session.query.getContextUsage).toHaveBeenCalledWith({ detail: "summary" });
       expect(session.contextWindowSize).toBe(200000);
 
       answer({ rawMaxTokens: 967000 });