1. INDEXING (one-time, then re-run when legacy changes)
   pnpm index
   → walks vite-mf-monorepo (349 files)
   → chunks each file into overlapping segments
   → embeds each chunk via nomic-embed-text (Ollama, local)
   → stores chunks + embeddings in MongoDB Atlas (legacy_chunks)

2. RECALL (at query time, triggered by Claude Code)
   Claude Code calls the recall() MCP tool with a natural language query
   → query is embedded via nomic-embed-text
   → vector search in MongoDB Atlas finds the top N most similar chunks
   → Claude Code receives file paths + content ranked by semantic similarity

ollama pull nomic-embed-text

ollama list

src/
  indexer/
    index.ts      # indexing pipeline entry point
    walk.ts       # recursive file walker with ignore rules
    classify.ts   # classifies files as app or package
    chunk.ts      # splits large files into overlapping chunks
  retriever/
    recall.ts     # embeds query + runs Atlas vector search
  mcp/
    server.ts     # stdio MCP server exposing recall() to Claude Code

pnpm install
cp .env.example .env  # fill in MONGODB_URI and LEGACY_PATH

{
  "mcpServers": {
    "rag-legacy": {
      "type": "stdio",
      "command": "pnpm",
      "args": ["--prefix", "/absolute/path/to/vite-mf-monorepo-rag", "run", "mcp"],
      "env": {
        "MONGODB_URI": "your_mongodb_uri",
        "LEGACY_PATH": "/absolute/path/to/vite-mf-monorepo"
      }
    }
  }
}

pnpm index        # run the full legacy indexing pipeline
pnpm mcp          # start the MCP server (Claude Code does this automatically)
pnpm build        # compile TypeScript
pnpm lint         # ESLint
pnpm type-check   # type check without compilation