chore(typecheck-green): fix 28 tsc errors — baseline 62→34

Quick wins:
- Export ToolResultBlockParam from Tool.ts (fixes 14 errors)
- Add 'xhigh' to EffortLevel Union types in settings/schemas (fixes 3)
- Fix color-diff test: add null second arg to detectLanguage (fixes 6)
- Add typed params to keychain stub (fixes 5)
- Create stubs: searchExtraTools.ts, toolIndex.ts (fixes 4)
- Add CORE_TOOLS set export to constants/tools.ts (fixes 1)

Remaining: 34 errors across 10 categories (ACP, SendMessageTool TCP, ListPeersTool UDS, acp-link, etc.)

docs/typecheck-baseline.md

@@ -0,0 +1,90 @@
+# TypeScript Error Baseline — chore/typecheck-green
+
+Date: 2026-06-02
+Command: `bun x tsc --noEmit`
+Total: **62 errors** across 22 files
+
+---
+
+## Group 1 — Core src/runtime errors (11 errors)
+
+| File | Line | Error | Category |
+|------|------|-------|----------|
+| `src/entrypoints/cli.tsx` | 140 | `ChannelPermissionRequestNotificationSchema` not on type | Missing export |
+| `src/services/acp/entry.ts` | 1,2,4 | Cannot find `@agentclientprotocol/sdk`, `./agent.js` | Missing module (ACP, gated) |
+| `src/services/localVault/store.ts` | 354,355,389,429,430 | Expected 0 arguments, got 1-2 | Decompile — `Keychain.setPassword()` sig mismatch |
+| `src/commands/effort/effort.tsx` | 30 | `EffortLevel` missing `"xhigh"` | Type union incomplete |
+| `src/components/EffortCallout.tsx` | 64 | Same `xhigh` issue | Type union incomplete |
+| `src/components/ModelPicker.tsx` | 204 | Same `xhigh` issue | Type union incomplete |
+
+---
+
+## Group 2 — provider / sideQuery / model-provider (0 errors)
+
+✅ All clear — sideQuery routing and @ant/model-provider pass typecheck.
+
+---
+
+## Group 3 — packages/@ant/* edge packages (8 errors)
+
+| File | Line | Error | Category |
+|------|------|-------|----------|
+| `packages/@ant/computer-use-swift/.../win32.ts` | 257 | `captureWindowTarget` not in `ScreenshotAPI` | Stub incomplete |
+| `packages/acp-link/src/cli/command.ts` | 22-66 | Boolean/string → undefined, missing `optional` prop | Decompile — Commander.js types |
+
+---
+
+## Group 4 — tests (7 errors)
+
+| File | Line | Error | Category |
+|------|------|-------|----------|
+| `packages/color-diff-napi/src/__tests__/color-diff.test.ts` | 75-86 | Expected 2 args, got 1 (6×) | Test interface mismatch |
+| `packages/remote-control-server/src/__tests__/disconnect-monitor.test.ts` | 78 | `status` not in session init type | Stale test |
+
+---
+
+## Group 5 — decompile residue (36 errors)
+
+### 5a — `ToolResultBlockParam` not exported (14 errors)
+Files: `CtxInspectTool`, `DiscoverSkillsTool`, `ListPeersTool`, `MonitorTool`, `PushNotificationTool`, `REPLTool`, `SendUserFileTool`, `SleepTool`, `SnipTool`, `SubscribePRTool`, `SuggestBackgroundPRTool`, `TerminalCaptureTool`, `VerifyPlanExecutionTool`, `WebBrowserTool`, `WorkflowTool`
+→ `src/Tool.ts` defines `ToolResultBlockParam` locally but doesn't export it. Add one `export` keyword.
+
+### 5b — Missing `searchExtraTools` module (4 errors)
+Files: `ExecuteTool/ExecuteTool.ts`, `SearchExtraToolsTool/SearchExtraToolsTool.ts`
+→ `src/utils/searchExtraTools.ts` and `src/services/searchExtraTools/toolIndex.ts` don't exist. Create stubs.
+
+### 5c — Missing `CORE_TOOLS` export (1 error)
+File: `SearchExtraToolsTool/prompt.ts`
+→ `src/constants/tools.ts` lacks `CORE_TOOLS`. Add the missing constant.
+
+### 5d — TCP type mismatches in SendMessageTool (5 errors)
+File: `SendMessageTool/SendMessageTool.ts` (lines 636,662,722,872,873)
+→ `peerType` union `"other" | "bridge" | "uds"` doesn't include `"tcp"`. `parseTcpTarget` missing from `peerAddress`.
+
+### 5e — `udsMessaging` / `bridge/peerSessions` missing exports (3 errors)
+File: `ListPeersTool` — `getUdsMessagingSocketPath`, `formatUdsAddress`, `listPeers`, `listBridgePeers`
+→ Stub the missing exports or add to existing stub files.
+
+### 5f — `updateSessionInit` missing `status` (1 error)
+See Group 4 above — test uses stale interface.
+
+---
+
+## Action Plan (Priority Order)
+
+### Quick wins (high impact, low risk):
+1. **Export `ToolResultBlockParam`** from `src/Tool.ts` — fixes 14 errors in one edit
+2. **Add `"xhigh"` to Effort union types** (3 components) — fixes 3 core errors
+3. **Fix `color-diff` test** — update argument count (6 errors)
+
+### Medium:
+4. **Create stubs** for `searchExtraTools.ts`, `toolIndex.ts` — fixes 4 errors
+5. **Add `CORE_TOOLS` export** — fixes 1 error
+6. **Fix `SendMessageTool` TCP types** — add `"tcp"` to union, stub `parseTcpTarget`
+
+### Deferred (gated features, low priority):
+7. **ACP module** (`@agentclientprotocol/sdk`) — feature-gated, install as devDep or stub
+8. **`ChannelPermissionRequestNotificationSchema`** — add export or stub
+9. **localVault Keychain sig** — fix method signatures on stub
+10. **acp-link Commander.js types** — add missing `optional` field
+11. **computer-use-swift win32** — add `captureWindowTarget` to interface (win32-only)

packages/color-diff-napi/src/__tests__/color-diff.test.ts

@@ -72,18 +72,18 @@ describe("detectColorMode", () => {
 
 describe("detectLanguage", () => {
 	test("detects language from file extension", () => {
-		expect(detectLanguage("index.ts")).toBe("ts");
-		expect(detectLanguage("main.py")).toBe("py");
-		expect(detectLanguage("style.css")).toBe("css");
+		expect(detectLanguage("index.ts", null)).toBe("ts");
+		expect(detectLanguage("main.py", null)).toBe("py");
+		expect(detectLanguage("style.css", null)).toBe("css");
 	});
 
 	test("detects language from known filenames", () => {
-		expect(detectLanguage("Makefile")).toBe("makefile");
-		expect(detectLanguage("Dockerfile")).toBe("dockerfile");
+		expect(detectLanguage("Makefile", null)).toBe("makefile");
+		expect(detectLanguage("Dockerfile", null)).toBe("dockerfile");
 	});
 
 	test("returns null for unknown extensions", () => {
-		expect(detectLanguage("file.xyz123")).toBeNull();
+		expect(detectLanguage("file.xyz123", null)).toBeNull();
 	});
 });
 

src/Tool.ts

@@ -70,6 +70,7 @@ export type {
   SkillToolProgress,
   TaskOutputProgress,
   WebSearchProgress,
+  ToolResultBlockParam,
 }
 
 import type { SpinnerMode } from './components/Spinner.js'

src/constants/tools.ts

@@ -111,3 +111,25 @@ export const COORDINATOR_MODE_ALLOWED_TOOLS = new Set([
   SEND_MESSAGE_TOOL_NAME,
   SYNTHETIC_OUTPUT_TOOL_NAME,
 ])
+
+/**
+ * Core tools that are always loaded and available in every session.
+ * These appear directly in the tool list — agents call them without SearchExtraTools.
+ */
+export const CORE_TOOLS = new Set<string>([
+  FILE_READ_TOOL_NAME,
+  FILE_EDIT_TOOL_NAME,
+  FILE_WRITE_TOOL_NAME,
+  GREP_TOOL_NAME,
+  GLOB_TOOL_NAME,
+  WEB_SEARCH_TOOL_NAME,
+  WEB_FETCH_TOOL_NAME,
+  SKILL_TOOL_NAME,
+  TODO_WRITE_TOOL_NAME,
+  AGENT_TOOL_NAME,
+  TASK_CREATE_TOOL_NAME,
+  TASK_GET_TOOL_NAME,
+  TASK_LIST_TOOL_NAME,
+  TASK_UPDATE_TOOL_NAME,
+  ...SHELL_TOOL_NAMES,
+])

src/entrypoints/sdk/controlSchemas.ts

@@ -507,7 +507,7 @@ export const SDKControlGetSettingsResponseSchema = lazySchema(() =>
           model: z.string(),
           // String levels only — numeric effort is ant-only and the
           // Zod→proto generator can't emit enum∪number unions.
-          effort: z.enum(['low', 'medium', 'high', 'max']).nullable(),
+          effort: z.enum(['low', 'medium', 'high', 'xhigh', 'max']).nullable(),
         })
         .optional()
         .describe(

src/entrypoints/sdk/coreSchemas.ts

@@ -1065,7 +1065,7 @@ export const ModelInfoSchema = lazySchema(() =>
         .optional()
         .describe('Whether this model supports effort levels'),
       supportedEffortLevels: z
-        .array(z.enum(['low', 'medium', 'high', 'max']))
+        .array(z.enum(['low', 'medium', 'high', 'xhigh', 'max']))
         .optional()
         .describe('Available effort levels for this model'),
       supportsAdaptiveThinking: z
@@ -1174,7 +1174,7 @@ export const AgentDefinitionSchema = lazySchema(() =>
           "Scope for auto-loading agent memory files. 'user' - ~/.claude/agent-memory/<agentType>/, 'project' - .claude/agent-memory/<agentType>/, 'local' - .claude/agent-memory-local/<agentType>/",
         ),
       effort: z
-        .union([z.enum(['low', 'medium', 'high', 'max']), z.number().int()])
+        .union([z.enum(['low', 'medium', 'high', 'xhigh', 'max']), z.number().int()])
         .optional()
         .describe(
           'Reasoning effort level for this agent. Either a named level or an integer',

src/services/localVault/keychain.ts

@@ -13,7 +13,7 @@ export class KeychainUnavailableError extends Error {
   }
 }
 
-const unavailable = () => {
+const unavailable = (..._args: unknown[]) => {
   throw new KeychainUnavailableError()
 }
 
@@ -24,4 +24,11 @@ export const tryKeychain = {
   list: unavailable,
   _addToIndex: unavailable,
   _removeFromIndex: unavailable,
+} as {
+  set(key: string, value: string): Promise<void>
+  get(key: string): Promise<string | undefined>
+  delete(key: string): Promise<boolean>
+  list(): Promise<string[]>
+  _addToIndex(key: string): Promise<void>
+  _removeFromIndex(key: string): Promise<void>
 }

src/services/searchExtraTools/toolIndex.ts

@@ -0,0 +1,30 @@
+/**
+ * Stub — searchExtraTools/toolIndex module.
+ * CC_Pure defers tool indexing to the main tool registry.
+ * This stub provides the minimum type surface.
+ */
+
+export interface SearchExtraToolsResult {
+  tools: ToolIndexEntry[]
+}
+
+export interface ToolIndexEntry {
+  name: string
+  description: string
+  schema: unknown
+}
+
+/** Get the current tool index. */
+export function getToolIndex(): ToolIndexEntry[] {
+  return []
+}
+
+/** Search tools in the index by query string. */
+export function searchTools(_query: string): SearchExtraToolsResult {
+  return { tools: [] }
+}
+
+/** Build a search index of all available deferred tools. */
+export function buildToolIndex(): ToolIndexEntry[] {
+  return []
+}

src/utils/searchExtraTools.ts

@@ -0,0 +1,36 @@
+/**
+ * Stub — searchExtraTools module.
+ * CC_Pure defers tool search to the main tool registry.
+ * This stub provides the minimum type surface for typecheck passage.
+ */
+
+/** Check if SearchExtraTools feature is enabled (optimistic). */
+export function isSearchExtraToolsEnabledOptimistic(): boolean {
+  return false
+}
+
+/** Check if SearchExtraTools tool is available. */
+export function isSearchExtraToolsToolAvailable(): boolean {
+  return false
+}
+
+/** Extract discovered tool names from a search result. */
+export function extractDiscoveredToolNames(
+  _result: unknown,
+): string[] {
+  return []
+}
+
+/** Search for deferred tools by query string. */
+export async function searchExtraTools(
+  _query: string,
+): Promise<Array<{ name: string; description: string; schema: unknown }>> {
+  return []
+}
+
+/** Load a specific deferred tool by name. */
+export async function loadDeferredTool(
+  _toolName: string,
+): Promise<{ name: string; call: (...args: unknown[]) => Promise<unknown> } | null> {
+  return null
+}

src/utils/settings/types.ts

@@ -710,8 +710,8 @@ export const SettingsSchema = lazySchema(() =>
       effortLevel: z
         .enum(
           process.env.USER_TYPE === 'ant'
-            ? ['low', 'medium', 'high', 'max']
-            : ['low', 'medium', 'high'],
+            ? ['low', 'medium', 'high', 'xhigh', 'max']
+            : ['low', 'medium', 'high', 'xhigh'],
         )
         .optional()
         .catch(undefined)