feat: Add persistent SQLite storage and searchable learnings

[rohitg00]

Summary

• Add persistent SQLite database with FTS5 full-text search at ~/.pro-workflow/data.db
• Implement stateless store factory pattern for database operations
• Add BM25-powered search for learnings with prefix matching and phrase search
• Update hooks to use database for session tracking
• Add new commands: /learn, /search, /list
• Graceful fallback to file-based storage when database unavailable

New Features

Persistent Storage

Learnings now survive reboots, stored in ~/.pro-workflow/data.db

Full-Text Search

/search testing           # Find testing-related learnings
/search "file paths"      # Exact phrase search

Session Analytics

Track edits, corrections, and prompts per session

New Commands

Command	Purpose
/learn	Save learning to SQLite database
/search <query>	Search learnings by keyword
/list	List all stored learnings

Files Changed

• New: src/db/ - Database initialization, store factory, schema
• New: src/search/fts.ts - BM25 search helpers
• New: commands/learn.md, search.md, list.md
• Updated: Hook scripts to use SQLite with file-based fallback
• Updated: package.json with better-sqlite3 dependency

Test plan

• Build passes: npm install && npm run build
• Database initializes at ~/.pro-workflow/data.db
• Session-start loads learnings from DB
• Search returns ranked results with BM25
• Fallback to file-based storage works when dist/ missing

[coderabbitai]

Warning

Rate limit exceeded

@rohitg00 has exceeded the limit for the number of commits that can be reviewed per hour. Please wait 33 minutes and 49 seconds before requesting another review.

⌛ How to resolve this issue?

After the wait time has elapsed, a review can be triggered using the @coderabbitai review command as a PR comment. Alternatively, push new commits to this PR.

We recommend that you space out your commits to avoid hitting the rate limit.

🚦 How do rate limits work?

CodeRabbit enforces hourly rate limits for each developer per organization.

Our paid plans have higher rate limits than the trial, open-source and free plans. In all cases, we re-allow further reviews after a brief timeout.

Please see our FAQ for further information.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/persistent-storage-searchable-learnings

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}