feat(ui): dedicated chat components for tool search/select/query

packages/client/workbench/src/mock/data/showcase.ts

@@ -384,21 +384,48 @@ export function createShowcaseToolBursts(terminalId = SHOWCASE_TERMINAL_ID): Sho
         title: 'Search chat renderers',
         kind: 'search',
         status: 'completed',
-        content: [],
+        content: [
+          {
+            type: 'content',
+            content: textBlock(
+              'packages/presentation/ui/src/chat/conversation-view.tsx\npackages/client/core/src/conversation.ts',
+            ),
+          },
+        ],
         rawInput: {
           query: 'permission-request|tool-call|plan',
           glob: '**/*.{ts,tsx}',
           cwd: '/mock/linkcode',
         },
+        // Claude's real Grep envelope: scalar counts, no matches array.
+        rawOutput: { mode: 'files_with_matches', numFiles: 2, numMatches: 12 },
+      },
+      {
+        toolCallId: 'mock-tool-toolsearch-select',
+        title: 'ToolSearch',
+        kind: 'search',
+        status: 'completed',
+        content: [
+          {
+            type: 'content',
+            content: textBlock('WebSearch\nmcp__linear__get_issue\nmcp__linear__save_issue'),
+          },
+        ],
+        rawInput: { query: 'select:WebSearch,mcp__linear__get_issue,mcp__linear__save_issue' },
         rawOutput: {
-          matches: [
-            'packages/presentation/ui/src/chat/conversation-view.tsx',
-            'packages/client/core/src/conversation.ts',
-          ],
-          files: 2,
-          elapsedMs: 17,
+          query: 'select:WebSearch,mcp__linear__get_issue,mcp__linear__save_issue',
+          total_deferred_tools: 110,
         },
       },
+      {
+        toolCallId: 'mock-tool-toolsearch-empty',
+        title: 'ToolSearch',
+        kind: 'search',
+        status: 'completed',
+        content: [{ type: 'content', content: textBlock('No matching deferred tools found') }],
+        rawInput: { query: '+jupyter notebook edit', max_results: 5 },
+        rawOutput: { query: '+jupyter notebook edit', total_deferred_tools: 110 },
+      },
     ],
     files: [
       {

packages/host/agent-adapter/src/__tests__/codex-history.test.ts

@@ -417,6 +417,53 @@ describe('mapCodexHistoryEvents', () => {
     ]);
   });
 
+  it("replays MCP calls under the live adapter's mcp slug, unwrapping the plugin namespace", () => {
+    // Real rollout shapes: the server rides `namespace` (`mcp__<server>`, sometimes with a stray
+    // trailing `__`); plugin apps namespace as `mcp__codex_apps__<app>` with a leading-`_` tool.
+    const events = mapCodexHistoryEvents(HID, [
+      responseItem({
+        type: 'function_call',
+        namespace: 'mcp__node_repl',
+        name: 'js',
+        arguments: '{"code":"1 + 1"}',
+        call_id: 'call_mcp1',
+      }),
+      responseItem({ type: 'function_call_output', call_id: 'call_mcp1', output: '2' }),
+      responseItem({
+        type: 'function_call',
+        namespace: 'mcp__computer_use__',
+        name: 'click',
+        arguments: '{}',
+        call_id: 'call_mcp2',
+      }),
+      responseItem({
+        type: 'function_call',
+        namespace: 'mcp__codex_apps__linear',
+        name: '_save_comment',
+        arguments: '{}',
+        call_id: 'call_mcp3',
+      }),
+      responseItem({
+        type: 'function_call',
+        namespace: 'collaboration',
+        name: 'send_message',
+        arguments: '{}',
+        call_id: 'call_builtin',
+      }),
+    ]);
+
+    const tools = toolCalls(events);
+    expect(tools.map((tool) => [tool.toolCallId, tool.title])).toEqual([
+      ['call_mcp1', 'mcp__node_repl__js'],
+      ['call_mcp1', 'mcp__node_repl__js'],
+      ['call_mcp2', 'mcp__computer_use__click'],
+      ['call_mcp3', 'mcp__linear__save_comment'],
+      ['call_builtin', 'send_message'],
+    ]);
+    expect(tools[0].kind).toBe('other');
+    expect(tools[1]).toMatchObject({ status: 'completed', kind: 'other' });
+  });
+
   it('settles an aborted run and a declined run as failed with the raw text as the record', () => {
     const events = mapCodexHistoryEvents(HID, [
       responseItem({

packages/host/agent-adapter/src/__tests__/codex-mcp-tools.test.ts

@@ -0,0 +1,82 @@
+import type { AgentEvent, StartOptions } from '@linkcode/schema';
+import { describe, expect, it } from 'vitest';
+import { CodexAdapter } from '../native/codex';
+import type { CodexServerHandle } from '../native/codex/adapter';
+import type { CodexAppServerOptions } from '../native/codex/app-server';
+
+/** Minimal fake satisfying `CodexServerHandle`, same shape as codex-compaction.test.ts's. */
+class FakeCodexServer {
+  constructor(private readonly opts: Omit<CodexAppServerOptions, 'binaryPath'>) {}
+  request(method: string): Promise<unknown> {
+    if (method === 'thread/start' || method === 'thread/resume') {
+      return Promise.resolve({ thread: { id: 'thread-1' } });
+    }
+    return Promise.resolve({});
+  }
+  setRequestHandler(): void {
+    // Approvals never fire on this path.
+  }
+  close(): void {
+    // Nothing to reap.
+  }
+  notify(method: string, params: unknown): void {
+    this.opts.onNotification(method, params);
+  }
+}
+
+class TestCodex extends CodexAdapter {
+  fakeServers: FakeCodexServer[] = [];
+  protected override startAppServer(
+    opts: Omit<CodexAppServerOptions, 'binaryPath'>,
+  ): Promise<CodexServerHandle> {
+    const server = new FakeCodexServer(opts);
+    this.fakeServers.push(server);
+    return Promise.resolve(server);
+  }
+  protected override readConfiguredSandbox() {
+    return Promise.resolve(undefined);
+  }
+}
+
+const start: StartOptions = { kind: 'codex', cwd: '/repo' };
+
+function toolTitles(events: AgentEvent[]) {
+  return events.flatMap((event) => (event.type === 'tool-call' ? [event.toolCall.title] : []));
+}
+
+describe('CodexAdapter mcpToolCall items', () => {
+  it('emits the shared mcp slug and strips the codex_apps plugin namespace', async () => {
+    const adapter = new TestCodex();
+    const events: AgentEvent[] = [];
+    adapter.onEvent((e) => events.push(e));
+    await adapter.start(start);
+    const server = adapter.fakeServers[0];
+
+    server.notify('turn/started', { turn: { id: 'turn-1' } });
+    // Real 0.144.6 shape: plugin apps mount under ONE `codex_apps` server, plugin in the tool name.
+    server.notify('item/started', {
+      item: {
+        type: 'mcpToolCall',
+        id: 'mcp-1',
+        server: 'codex_apps',
+        tool: 'linear.list_issues',
+        status: 'inProgress',
+        arguments: { limit: 50 },
+      },
+    });
+    server.notify('item/started', {
+      item: { type: 'mcpToolCall', id: 'mcp-2', server: 'context7', tool: 'resolve_library' },
+    });
+    server.notify('item/started', {
+      item: { type: 'mcpToolCall', id: 'mcp-3', server: 'codex_apps', tool: 'dotless' },
+    });
+    server.notify('turn/completed', { turn: { id: 'turn-1', status: 'completed' } });
+
+    // Announce + teardown settle both re-emit the full snapshot; the title must be stable.
+    expect([...new Set(toolTitles(events))]).toEqual([
+      'mcp__linear__list_issues',
+      'mcp__context7__resolve_library',
+      'mcp__codex_apps__dotless',
+    ]);
+  });
+});

packages/host/agent-adapter/src/native/codex/adapter.ts

@@ -155,6 +155,8 @@ export type CodexServerHandle = Pick<CodexAppServer, 'request' | 'setRequestHand
 
 const CODEX_AUTH_FAILED_MESSAGE = 'Codex authentication failed — sign in to your ChatGPT account';
 
+const CODEX_PLUGIN_APPS_SERVER = 'codex_apps';
+
 /** Whether an app-server `error` notification reports the 401 of a signed-out/expired login. The
  * structured status (`codexErrorInfo.responseStreamDisconnected.httpStatusCode`) rides only the
  * mid-retry notifications; the final no-retry error leaves the 401 in prose — match both
@@ -1279,11 +1281,21 @@ export class CodexAdapter extends BaseAgentAdapter {
         break;
       }
       case 'mcpToolCall': {
-        const server = stringField(item, 'server') ?? 'mcp';
-        const tool = stringField(item, 'tool') ?? 'tool';
+        // Emit the shared `mcp__<server>__<tool>` slug — the UI's server/tool join key — instead
+        // of codex's raw `server.tool`. Plugin apps all mount under the one `codex_apps` server
+        // with the plugin in the tool's first segment; surface the plugin as the server.
+        let server = stringField(item, 'server') ?? 'mcp';
+        let tool = stringField(item, 'tool') ?? 'tool';
+        if (server === CODEX_PLUGIN_APPS_SERVER) {
+          const plugin = tool.indexOf('.');
+          if (plugin > 0 && plugin < tool.length - 1) {
+            server = tool.slice(0, plugin);
+            tool = tool.slice(plugin + 1);
+          }
+        }
         this.emitTool({
           toolCallId: id,
-          title: `${server}.${tool}`,
+          title: `mcp__${server}__${tool}`,
           kind: 'other',
           status: mapCodexItemStatus(stringField(item, 'status')),
           content: [],

packages/host/agent-adapter/src/native/codex/history-tools.ts

@@ -74,6 +74,21 @@ export function codexToolAnnounce(
 
   // function_call: JSON-encoded `arguments`.
   const args = parseArguments(payload);
+  const mcp = codexMcpToolName(payload);
+  if (mcp) {
+    // Converge with the live adapter's `mcp__<server>__<tool>` slug (and its kind) so a
+    // replayed MCP call renders like the live turn did.
+    return {
+      toolCall: {
+        toolCallId: callId,
+        title: `mcp__${mcp.server}__${mcp.tool}`,
+        kind: 'other',
+        status: 'in_progress',
+        content: [],
+        rawInput: args,
+      },
+    };
+  }
   if (name === 'update_plan') {
     const plan = planFromArgs(args);
     if (plan) return { plan };
@@ -114,6 +129,31 @@ export function codexToolAnnounce(
   };
 }
 
+const MCP_NAMESPACE_PREFIX = 'mcp__';
+const PLUGIN_APPS_NAMESPACE_PREFIX = 'codex_apps__';
+
+/** Rollout MCP rows are `function_call`s whose sibling `namespace` is `mcp__<server>` (observed
+ * with a stray trailing `__` on some rows); `name` is the bare tool. Plugin apps namespace as
+ * `mcp__codex_apps__<app>` with one leading `_` on the tool name — surface the app as the
+ * server, like the live adapter does. Built-ins carry no namespace or a non-`mcp__` one.
+ * (Verified against real 0.131–0.146 rollouts, 2026-08.) */
+function codexMcpToolName(
+  payload: Record<string, unknown>,
+): { server: string; tool: string } | undefined {
+  const namespace = stringField(payload, 'namespace');
+  const name = stringField(payload, 'name');
+  if (!namespace || !name || !namespace.startsWith(MCP_NAMESPACE_PREFIX)) return undefined;
+  let server = namespace.slice(MCP_NAMESPACE_PREFIX.length);
+  let tool = name;
+  if (server.startsWith(PLUGIN_APPS_NAMESPACE_PREFIX)) {
+    server = server.slice(PLUGIN_APPS_NAMESPACE_PREFIX.length);
+    if (tool[0] === '_') tool = tool.slice(1);
+  } else if (server.endsWith('__')) {
+    server = server.slice(0, -2);
+  }
+  return server.length > 0 && tool.length > 0 ? { server, tool } : undefined;
+}
+
 /** Settle an output row into the final snapshot, keeping the announce's diff content for edits and
  * unwrapping the freeform-exec output envelope for everything else. */
 export function codexToolSettle(

packages/host/engine/tests/integration/git-mutations.test.ts

@@ -22,6 +22,7 @@ function makeRepo(): string {
   git(cwd, 'init', '-b', 'main');
   git(cwd, 'config', 'user.email', 'test@test');
   git(cwd, 'config', 'user.name', 'test');
+  git(cwd, 'config', 'commit.gpgsign', 'false');
   writeFileSync(join(cwd, 'file.txt'), 'one\n');
   git(cwd, 'add', '--all');
   git(cwd, 'commit', '-m', 'initial');

packages/presentation/i18n/src/locales/en.ts

@@ -156,6 +156,18 @@ export const en = {
       failed: 'Failed',
       expand: 'Expand',
       collapse: 'Collapse',
+      toolSearch: {
+        select: 'Tool selection',
+        selecting: 'Selecting tools',
+        selected: 'Selected {count, plural, one {a tool} other {# tools}}',
+        search: 'Tool search',
+        searching: 'Searching for tools',
+        searched: 'Searched for tools',
+      },
+      searchSummary: {
+        matches: '{count, plural, one {a match} other {# matches}}',
+        files: '{count, plural, one {a file} other {# files}}',
+      },
     },
     subagent: {
       label: 'Subagent',

packages/presentation/i18n/src/locales/zh-cn.ts

@@ -152,6 +152,18 @@ export const zhCN = {
       failed: '失败',
       expand: '展开',
       collapse: '收起',
+      toolSearch: {
+        select: '工具选择',
+        selecting: '正在选择工具',
+        selected: '{count, plural, =1 {已选择一个工具} other {已选择 # 个工具}}',
+        search: '工具搜索',
+        searching: '正在搜索工具',
+        searched: '已搜索工具',
+      },
+      searchSummary: {
+        matches: '{count, plural, =1 {一个匹配} other {# 个匹配}}',
+        files: '{count, plural, =1 {一个文件} other {# 个文件}}',
+      },
     },
     subagent: {
       label: '子代理',