gitops-automation/README.md

# gitops-automation

Claude Code automation wired into Gitea + Portainer + Matrix on this VPS. See
`~/.claude/plans/cozy-honking-lantern.md` on the host for the full design rationale.

Three things this gives you:
- **PR review**: opening/updating a PR in a watched Gitea repo gets a Claude-authored
  review comment.
- **GitOps redeploy**: pushing to `main` on this repo rebuilds the `claude-agent` image
  (Gitea Actions) and redeploys the stack (Portainer webhook).
- **Chat-driven coding agent**: `!claude owner/repo <instruction>` in the Matrix control
  room clones the repo, runs Claude Code, and opens a PR with the result.
- **Ask other models**: `!ai <prompt>` (default model) or `!ai provider/model <prompt>`
  (e.g. `!ai google/gemini-2.0-flash-001 explain this error`) queries any model on
  OpenRouter and replies in the room. No repo/file access — just a chat reply, unlike
  `!claude` which is the only command that can edit files and open PRs.

Nothing here auto-merges. Every path stops at a comment or an open PR — a human clicks merge.

## Prerequisites (one-time, on the VPS)

```bash
sudo usermod -aG docker william   # then start a new shell/session
docker network create web
```

## Bring-up order

1. **DNS** — confirm these resolve to `217.160.66.143`:
   `gitea.apps.williamturner.eu`, `portainer.apps.williamturner.eu`,
   `matrix.apps.williamturner.eu`, `agent.apps.williamturner.eu`.

2. **Front Gitea with Traefik**: edit `~/gitea/docker-compose.yml` — add it to the `web`
   network and Traefik labels (mirror the `matrix-homeserver` block in this repo's
   `docker-compose.yml`, using port `3000` as the service port and rule
   `` Host(`gitea.apps.williamturner.eu`) ``). Update `~/gitea/data/gitea/conf/app.ini`:
   `DOMAIN` and `ROOT_URL` → `https://gitea.apps.williamturner.eu/`. Recreate the container,
   confirm the HTTPS URL works, *then* remove `3000:3000` from the port mapping.

3. **Front Portainer with Traefik**: same pattern on `~/portainer-compose.yaml`, service
   port `9443` (Portainer serves TLS itself on that port — either terminate TLS at Traefik
   with `traefik.http.services.portainer.loadbalancer.server.scheme=https` and
   `serversTransport` with insecure skip-verify, or simplest: also expose Portainer's plain
   HTTP port internally and point Traefik at that instead). Confirm
   `https://portainer.apps.williamturner.eu` works before removing `9443:9443`.

4. **Create the `gitops-automation` repo in Gitea** (via `http://217.160.66.143:3000` if
   step 2 isn't done yet, otherwise the HTTPS URL), push this directory to it.

5. **Gitea API token**: user Settings → Applications → generate a token with repo +
   webhook scopes. Put it in `.env` as `GITEA_TOKEN`.

6. **Gitea Actions runner**: admin Settings → Actions → Runners → create registration
   token → `.env` as `ACT_RUNNER_REGISTRATION_TOKEN`. Also set repo-level Actions
   variables `GITEA_HOST` (e.g. `gitea.apps.williamturner.eu`) and secret `GITEA_TOKEN`
   (Settings → Actions → Variables/Secrets on the repo) — the workflow in
   `.gitea/workflows/build.yml` reads those.

7. **First image build** (registry is empty until Actions runs once):
   ```bash
   cp .env.example .env   # fill in values as you go
   docker build -t "$(grep GITEA_REGISTRY_IMAGE .env | cut -d= -f2)" ./agent
   docker login <gitea-host> -u <your-username>
   docker push "$(grep GITEA_REGISTRY_IMAGE .env | cut -d= -f2)"
   ```

8. **Bring up the stack**, ideally as a Portainer "Repository" stack pointed at this repo
   (so it's also the GitOps redeploy target) — or directly:
   ```bash
   docker compose up -d
   ```

9. **First boot: Matrix bot account** — with `MATRIX_ALLOW_REGISTRATION=true` in `.env`,
   redeploy `matrix-homeserver`, then register the bot:
   ```bash
   curl -s https://matrix.apps.williamturner.eu/_matrix/client/v3/register \
     -H 'Content-Type: application/json' \
     -d '{"username":"claude-bot","password":"<pick one>","auth":{"type":"m.login.dummy"}}'
   ```
   This returns an `access_token` — put it in `.env` as `MATRIX_BOT_TOKEN`. Then set
   `MATRIX_ALLOW_REGISTRATION=false` and redeploy `matrix-homeserver` again.

10. **Control room**: from any Matrix client logged in as yourself on this homeserver,
    create a room, invite `@claude-bot:matrix.apps.williamturner.eu`, copy the room ID
    into `.env` as `MATRIX_CONTROL_ROOM_ID`. Redeploy `claude-agent`.

11. **Portainer stack webhook**: in the stack's settings, enable the webhook, copy the URL
    into `.env`/repo secrets as `PORTAINER_STACK_WEBHOOK_URL`.

12. **Gitea webhooks** on each repo you want automation for:
    - push → `main` → `PORTAINER_STACK_WEBHOOK_URL` (only needed on *this* repo, for
      GitOps redeploy of the automation stack itself)
    - pull request (opened, synchronized) → `https://agent.apps.williamturner.eu/webhooks/gitea`,
      secret = `GITEA_WEBHOOK_SECRET`, on every repo you want auto-reviewed.

13. **Firewall**: `sudo ufw allow 80/tcp 443/tcp`; once the HTTPS routes above are all
    confirmed working, `sudo ufw delete allow 3000/tcp` and `sudo ufw delete allow 9443/tcp`.

## Smoke test

- Open a throwaway PR on a repo with the PR webhook set → expect a Claude review comment.
- In the Matrix control room: `!claude owner/repo add a comment to the README` → expect a
  "working on it" reply, then a PR link.
- `git push` to `main` on this repo → expect a Gitea Actions run, then a Portainer redeploy.

## Notes

- `agent/src/runner.js` is the only thing that ever runs `git commit`/`git push`/`git
  checkout` — Claude Code itself is explicitly denied those tools (`--disallowedTools`),
  so even a misbehaving prompt can't push directly or touch `main`.
- The Matrix bot only reacts inside `MATRIX_CONTROL_ROOM_ID`; keep that room invite-only.
- `.gitea/workflows/build.yml` assumes the act_runner label `docker` — check
  `GITEA_RUNNER_LABELS` in `docker-compose.yml` matches what you actually registered.

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