chore: remove backend code nothing references

Found with knip (exports, types, class members) and confirmed by a text
search of src, test, scripts and packages before each removal.

- Per-CLI get<Cli>NotFoundMessage() (nine of them) with their message
  constants: missingCliMessage() builds that text from the registry now.
- Registry leftovers: renderCliCommand, asCliId, cliIds, isCliRunnable,
  createCliResolverForTest, profileExists, and two name lists that only
  repeated schema enums.
- A task-description cache in Session that was written on every chunk of
  terminal output (one regex pass per line) and never read since the
  subagent watcher takes descriptions from transcripts. The cache module,
  its pattern and both parse methods go with it.
- Session.parentAgentId / childAgentIds: never set by anything, so the two
  optional SessionState fields were never on the wire.
- Unreferenced methods on TmuxManager (pipe-pane pair, syncMouseMode),
  RespawnController, StateStore.recoverFromBackup (load() already falls
  back to the .bak file), TeamWatcher, SseStreamManager and the AI
  checkers' getErrorVerdict.
- updateCaseEnvVars: the settings.local.json env path that envOverrides
  replaced.
- Re-exports in the utils, cli-registry, routes and prompts barrels that
  no importer used, and unused test helpers (MockStateStore, the mobile
  throttle helpers and others).

Eight mobile tests imported the WebServer type from a path that does not
exist (../src instead of ../../src); type-only, so nothing failed.

Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>

test/mocks/index.ts

@@ -2,14 +2,11 @@
  * Shared test mocks — import from here instead of defining inline.
  *
  * @example
- * import { MockSession, MockStateStore, terminalOutputs } from './mocks/index.js';
+ * import { MockSession, createMockRouteContext } from './mocks/index.js';
  */
 
-export { MockSession, createMockSession, terminalOutputs } from './mock-session.js';
-export { MockStateStore } from './mock-state-store.js';
+export { MockSession, createMockSession } from './mock-session.js';
 export {
-  waitForEvent,
-  createDeferred,
   safeRmHomeTree,
   isUnderTestHome,
   isSandboxedHome,

test/mocks/mock-session.ts

@@ -534,55 +534,6 @@ export class MockSession extends EventEmitter {
   getMessages = vi.fn(() => []);
 }
 
-/**
- * Generate realistic terminal output for testing.
- * Must match the patterns used in MockSession's simulate* methods.
- */
-export const terminalOutputs = {
-  /** Standard completion message */
-  completion(duration: string = '2m 46s'): string {
-    return `\n\u273b Worked for ${duration}\n  123.4k tokens used\n`;
-  },
-
-  /** Working spinner output */
-  working(activity: string = 'Thinking'): string {
-    return `${activity}... \u280b`;
-  },
-
-  /** Plan mode prompt */
-  planMode(question: string = 'Would you like to proceed?'): string {
-    return [`\n${question}\n`, '\u276f 1. Yes\n', '  2. No\n', '  3. Type your own\n'].join('');
-  },
-
-  /** Prompt character */
-  prompt(): string {
-    return '\n\u276f ';
-  },
-
-  /** Token count display */
-  tokens(count: number): string {
-    const formatted =
-      count >= 1000000
-        ? `${(count / 1000000).toFixed(1)}M`
-        : count >= 1000
-          ? `${(count / 1000).toFixed(1)}k`
-          : String(count);
-    return `  ${formatted} tokens\n`;
-  },
-
-  /** Large output for buffer testing */
-  largeOutput(sizeKb: number = 100): string {
-    const baseText = 'Lorem ipsum dolor sit amet. '.repeat(100);
-    const repetitions = Math.ceil((sizeKb * 1024) / baseText.length);
-    return baseText.repeat(repetitions).slice(0, sizeKb * 1024);
-  },
-
-  /** ANSI colored output */
-  ansiColored(text: string): string {
-    return `\x1b[32m${text}\x1b[0m`;
-  },
-};
-
 /**
  * Convenience factory.
  */

test/mocks/mock-state-store.ts

@@ -1,60 +0,0 @@
-/**
- * Shared MockStateStore for tests.
- *
- * Includes methods for both session management and Ralph loop testing.
- * All methods are vi.fn() spies — tests can override return values as needed.
- *
- * NOTE: This is for direct instantiation in new tests. Existing tests that
- * use vi.mock('../src/state-store.js') keep their inline definitions.
- */
-import { vi } from 'vitest';
-
-export class MockStateStore {
-  state: Record<string, unknown> = {
-    sessions: {} as Record<string, unknown>,
-    config: { maxConcurrentSessions: 5 },
-    ralphLoop: { status: 'stopped' },
-    tasks: {} as Record<string, unknown>,
-  };
-
-  // Session methods
-  getConfig = vi.fn(() => this.state.config);
-  getSessions = vi.fn(() => this.state.sessions as Record<string, unknown>);
-  getSession = vi.fn((id: string) => (this.state.sessions as Record<string, unknown>)[id]);
-  setSession = vi.fn((id: string, state: unknown) => {
-    (this.state.sessions as Record<string, unknown>)[id] = state;
-  });
-  removeSession = vi.fn((id: string) => {
-    delete (this.state.sessions as Record<string, unknown>)[id];
-  });
-
-  // Ralph state methods
-  getRalphLoopState = vi.fn(() => this.state.ralphLoop);
-  setRalphLoopState = vi.fn((update: Record<string, unknown>) => {
-    this.state.ralphLoop = { ...(this.state.ralphLoop as Record<string, unknown>), ...update };
-  });
-
-  // Task methods
-  getTasks = vi.fn(() => this.state.tasks);
-  setTask = vi.fn();
-  removeTask = vi.fn();
-
-  // Settings methods
-  getSettings = vi.fn(() => ({}));
-  setSettings = vi.fn();
-
-  // Generic persistence
-  save = vi.fn();
-  load = vi.fn();
-
-  /** Reset all state and mocks for clean test isolation */
-  reset(): void {
-    this.state = {
-      sessions: {},
-      config: { maxConcurrentSessions: 5 },
-      ralphLoop: { status: 'stopped' },
-      tasks: {},
-    };
-    vi.clearAllMocks();
-  }
-}

test/mocks/test-helpers.ts

@@ -1,43 +1,10 @@
 /**
- * Reusable async test helpers.
+ * Guards for tests that delete under the throwaway HOME.
  */
 
 import { rmSync } from 'node:fs';
 import { basename, resolve } from 'node:path';
 
-/** Wait for an EventEmitter to emit a specific event, with timeout */
-export function waitForEvent(
-  emitter: { once: (event: string, listener: (...args: unknown[]) => void) => void },
-  event: string,
-  timeoutMs = 5000
-): Promise<unknown> {
-  return new Promise((resolve, reject) => {
-    const timer = setTimeout(
-      () => reject(new Error(`Timed out waiting for event "${event}" after ${timeoutMs}ms`)),
-      timeoutMs
-    );
-    emitter.once(event, (...args: unknown[]) => {
-      clearTimeout(timer);
-      resolve(args.length === 1 ? args[0] : args);
-    });
-  });
-}
-
-/** Create a deferred promise with external resolve/reject */
-export function createDeferred<T = void>(): {
-  promise: Promise<T>;
-  resolve: (value: T) => void;
-  reject: (reason?: unknown) => void;
-} {
-  let resolve!: (value: T) => void;
-  let reject!: (reason?: unknown) => void;
-  const promise = new Promise<T>((res, rej) => {
-    resolve = res;
-    reject = rej;
-  });
-  return { promise, resolve, reject };
-}
-
 /**
  * Prefix of the throwaway HOME `test/setup.ts` creates (`mkdtempSync(join(tmpdir(), 'codeman-vitest-'))`).
  * Pinned by test/test-env-isolation.test.ts, so renaming one without the other fails there.