refactor(context): remove legacy FrameManager and consolidate imports

- Delete frame-manager.ts (1,391 lines) - legacy implementation
- Update all imports to use index.js centralized exports
- Fix updateParentFrame to properly update parent_frame_id and depth
- Add validation for non-existent parent frames
- Support parent_frame_id and depth updates in FrameDatabase
- Rewrite cycle detection tests to use unified FrameManager

https://claude.ai/code/session_014ojs76858uGzWb6Hrbs4VG

Author: claude

src/__tests__/generated/frame-manager.bench.ts

@@ -4,7 +4,7 @@
  */
 
 import { bench, describe } from 'vitest';
-import { FrameManager } from '../../core/context/frame-manager.js';
+import { FrameManager } from '../../core/context/index.js';
 import Database from 'better-sqlite3';
 import { join } from 'path';
 import { mkdtempSync, rmSync } from 'fs';

src/__tests__/generated/frame-manager.generated.test.ts

@@ -4,7 +4,7 @@
  */
 
 import { describe, it, expect, beforeEach, afterEach } from 'vitest';
-import { FrameManager } from '../../core/context/frame-manager.js';
+import { FrameManager } from '../../core/context/index.js';
 import Database from 'better-sqlite3';
 import { join } from 'path';
 import { mkdtempSync, rmSync } from 'fs';

src/__tests__/integration/fixtures/test-data-generator.ts

@@ -3,7 +3,7 @@
  * Creates realistic test data for integration testing
  */
 
-import type { Frame, Event } from '../../../core/context/frame-manager.js';
+import type { Frame, Event } from '../../../core/context/index.js';
 
 export interface TestFrameOptions {
   count?: number;

src/__tests__/integration/helpers/test-environment.ts

@@ -4,7 +4,7 @@
  */
 
 import { SQLiteAdapter, SQLiteConfig } from '../../../core/database/sqlite-adapter.js';
-import { FrameManager } from '../../../core/context/frame-manager.js';
+import { FrameManager } from '../../../core/context/index.js';
 import { SharedContextLayer } from '../../../core/context/shared-context-layer.js';
 import { ContextBridge } from '../../../core/context/context-bridge.js';
 import { ContextRetriever } from '../../../core/retrieval/context-retriever.js';

src/agents/core/agent-task-manager.ts

@@ -15,7 +15,7 @@ import {
   TaskPriority,
 } from '../../features/tasks/linear-task-manager.js';
 import { logger } from '../../core/monitoring/logger.js';
-import { FrameManager } from '../../core/context/frame-manager.js';
+import { FrameManager } from '../../core/context/index.js';
 import { TaskError, ErrorCode } from '../../core/errors/index.js';
 
 export interface AgentTaskSession {

src/cli/commands/clear.ts

@@ -12,7 +12,7 @@ import * as path from 'path';
 import Database from 'better-sqlite3';
 import { existsSync } from 'fs';
 import { ClearSurvival } from '../../core/session/clear-survival.js';
-import { FrameManager } from '../../core/context/frame-manager.js';
+import { FrameManager } from '../../core/context/index.js';
 import { HandoffGenerator } from '../../core/session/handoff-generator.js';
 import { sessionManager } from '../../core/session/session-manager.js';
 import { getEnv, getOptionalEnv } from '../../utils/env.js';

src/cli/commands/context.ts

@@ -7,7 +7,7 @@ import { Command } from 'commander';
 import Database from 'better-sqlite3';
 import { join } from 'path';
 import { existsSync } from 'fs';
-import { FrameManager, FrameType } from '../../core/context/frame-manager.js';
+import { FrameManager, FrameType } from '../../core/context/index.js';
 import { createContextRehydrateCommand } from './context-rehydrate.js';
 
 // Type-safe environment variable access

src/cli/commands/dashboard.ts

@@ -6,7 +6,7 @@
 import chalk from 'chalk';
 import Table from 'cli-table3';
 import { SessionManager } from '../../core/session/session-manager.js';
-import { FrameManager } from '../../core/context/frame-manager.js';
+import { FrameManager } from '../../core/context/index.js';
 import Database from 'better-sqlite3';
 import { join } from 'path';
 import { existsSync } from 'fs';

src/cli/commands/discovery.ts

@@ -8,7 +8,7 @@ import Database from 'better-sqlite3';
 import { join } from 'path';
 import { existsSync } from 'fs';
 import chalk from 'chalk';
-import { FrameManager } from '../../core/context/frame-manager.js';
+import { FrameManager } from '../../core/context/index.js';
 import { LLMContextRetrieval } from '../../core/retrieval/index.js';
 import { DiscoveryHandlers } from '../../integrations/mcp/handlers/discovery-handlers.js';
 

src/cli/commands/handoff.ts

@@ -15,7 +15,7 @@ import {
 import { join } from 'path';
 import Database from 'better-sqlite3';
 import { z } from 'zod';
-import { FrameManager } from '../../core/context/frame-manager.js';
+import { FrameManager } from '../../core/context/index.js';
 import { LinearTaskManager } from '../../features/tasks/linear-task-manager.js';
 import { logger } from '../../core/monitoring/logger.js';
 import { EnhancedHandoffGenerator } from '../../core/session/enhanced-handoff.js';