docs: pre-release audit and documentation improvements

- Simplify CONTRIBUTING.md for open source contributors
- Update version to 0.1.0 (Open Source) in overview
- Clarify BYO-key requirement in UI docs
- Expand open source explanation in docs/9
- Add comprehensive pre-public release audit notes

docs/9_open-source.md

@@ -1,9 +1,30 @@
-# RA-H BYO-Key Plan (Future Work)
+# RA-H Open Source
 
-The production repo remains private and powers the packaged Mac app. A separate, minimal open-source project will be created later for users who want to run RA-H with their own API keys. That future repo will include:
+This is the open source, BYO-key (bring your own API keys) version of RA-H.
 
-1. Basic three-panel UI
-2. Local SQLite storage
-3. Simple Settings → API Keys experience (no Supabase/subscription backend)
+## What's Included
 
-No active work is happening in this repo toward that goal right now. Track progress in `docs/development/prd-private-repo-reset.md`.
+- Full three-panel UI (Nodes | Focus | Helpers)
+- Local SQLite storage with vector search
+- Complete agent system (ra-h, mini-rah, wise-rah)
+- All tools and workflows
+- Settings panel with API key management
+
+## What's Not Included
+
+- Mac app packaging (Tauri)
+- Supabase authentication
+- Subscription/payment system
+- Auto-updates
+
+## Relationship to Private Repo
+
+This repo is a **mirror** of the private `ra-h` repository. Features are developed privately and synced here periodically.
+
+- **Contributions welcome** - See [CONTRIBUTING.md](../CONTRIBUTING.md)
+- **Bug reports** - Open an issue on GitHub
+- **Feature requests** - Open an issue; major features are typically built in the private repo first
+
+## Setup
+
+See the main [README.md](../README.md) for installation instructions.