# OpenCode on CT 116 (Submatter)

Headless coding harness for Submatter. Prefer this over OpenHands.

Runs `opencode serve` on `:4096` (HTTP API for the worker). Attach a TUI with
`opencode attach http://…:4096`, or use the browser via Traefik once Authentik
is happy. The image has no desktop browser — do not use `opencode web` in
compose without an `xdg-open` stub (entrypoint provides one if you switch back).

## Tooling image

`docker/opencode/Dockerfile` extends `ghcr.io/anomalyco/opencode:latest` with:

- `git`, `openssh-client`, `gh`
- Node.js + `npm` + `pnpm` + `tsx`
- `bash`, `curl`, `ripgrep`, `python3`, `make`, `g++` (native module builds)

Forgejo HTTPS auth is seeded from `FORGEJO_TOKEN` into `~/.git-credentials` at
container start. Projects live under `/workspace/<repo>` on the shared volume.

```bash
export COMPOSE_PROFILES=opencode
docker compose --project-directory /opt/submatter \
  -f docker/docker-compose.prod.yml --env-file .env \
  build opencode
bash scripts/deploy-prod.sh up
```

## Enable

On CT 116 `/opt/submatter/.env`:

```bash
COMPOSE_PROFILES=opencode
WORKER_SESSION_TYPE=opencode
OPENCODE_SERVER_PASSWORD=<openssl rand -hex 24>
OPENCODE_SERVER_URL=http://opencode:4096
OMNIROUTE_BASE_URL=https://omniroute.stillwell.cloud/v1
OMNIROUTE_API_KEY=<gateway inference key>
FORGEJO_TOKEN=<forgejo pat with repo scope>
```

Then:

```bash
export COMPOSE_PROFILES=opencode
bash scripts/deploy-prod.sh up
# First time / after worker harness code lands:
# bash scripts/deploy-prod.sh build
```

## URLs

| Surface | URL |
|---------|-----|
| Traefik | `https://opencode.stillwell.cloud` (Authentik + basic auth) |
| Worker API | `http://opencode:4096` on the `echodo` Docker network |
| LAN health | `curl -u opencode:$OPENCODE_SERVER_PASSWORD http://192.168.68.116:4096/global/health` |

## Auth

- Browser: Authentik via Traefik (`authentik-auth`) **and** OpenCode basic auth.
- Worker: same basic auth via `OPENCODE_SERVER_PASSWORD`.
- Models: `@omniroute/opencode-plugin` + `OMNIROUTE_API_KEY` (seeded into `auth.json` by `entrypoint.sh`).
- Git: `FORGEJO_TOKEN` → HTTPS credential helper for `forgejo.stillwell.cloud`.

## RAM

Container capped at 3 GB (Next.js builds). Keep one concurrent agent until host RAM → 64 GB.