Implement end-to-end MVP: CLI init → index → MCP tools

This commit completes the core MVP implementation:

**Core Storage Layer (@codebrain/core)**
- Add SQLite schema with signals, documents, scopes tables
- Implement SQLiteStorage class with SignalStore, DocumentStore, ScopeStore
- Full-text search via FTS5 virtual tables with sync triggers
- Add better-sqlite3 dependency for synchronous SQLite access

**CLI (@codebrain/cli)**
- Add config-loader.ts with jiti for TypeScript config loading
- Implement `codebrain init` command (creates .codebrain, config, database)
- Implement `codebrain index` command (indexes Claude Code conversations)
- Implement `codebrain status` command (shows database statistics)
- Implement `codebrain search/context/export` commands
- Auto-detect Claude Code project paths

**MCP Server (@codebrain/mcp-server)**
- Wire all tool handlers to use SQLiteStorage
- Implement codebrain_search, codebrain_context, codebrain_validate
- Implement codebrain_record, codebrain_status tools

**Verified:**
- Build passes (all 5 packages)
- TypeScript check passes
- ESLint passes
- CLI commands work: init, index, status

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: TerminalGravity

.gitignore

@@ -13,6 +13,7 @@ examples/**/*.js.map
 
 # Codebrain data (user's local index)
 .codebrain/
+codebrain.config.ts
 
 # Claude Code plugin state
 .claude/

.npmrc

@@ -0,0 +1 @@
+enable-pre-post-scripts=true

package.json

@@ -31,5 +31,8 @@
     "eslint": "^8.55.0",
     "@typescript-eslint/eslint-plugin": "^6.13.0",
     "@typescript-eslint/parser": "^6.13.0"
+  },
+  "pnpm": {
+    "onlyBuiltDependencies": ["better-sqlite3"]
   }
 }

packages/cli/package.json

@@ -23,7 +23,8 @@
     "commander": "^12.0.0",
     "chalk": "^5.3.0",
     "ora": "^8.0.0",
-    "inquirer": "^9.0.0"
+    "inquirer": "^9.0.0",
+    "jiti": "^2.0.0"
   },
   "devDependencies": {
     "typescript": "^5.3.0"