# opencode Forgejo Action

A Forgejo Action that integrates [opencode](https://opencode.ai) directly into your Forgejo Actions workflow.

Mention `/opencode` or `/oc` in your comment, and opencode will execute tasks within your Forgejo Actions runner.

## Features

### Explain an issue

Leave the following comment on a Forgejo issue. `opencode` will read the entire thread, including all comments, and reply with a clear explanation.

```
/opencode explain this issue
```

### Fix an issue

Leave the following comment on a Forgejo issue. opencode will create a new branch, implement the changes, and open a merge request with the changes.

```
/opencode fix this
```

### Review MRs and make changes

Leave the following comment on a Forgejo MR. opencode will implement the requested change and commit it to the same MR.

```
Delete the attachment from S3 when the note is removed /oc
```

### Review specific code lines

Leave a comment directly on code lines in the MR's "Files" tab. opencode will automatically detect the file, line numbers, and diff context to provide precise responses.

```
[Comment on specific lines in Files tab]
/oc add error handling here
```

When commenting on specific lines, opencode receives:

- The exact file being reviewed
- The specific lines of code
- The surrounding diff context
- Line number information

## Installation

### Quick setup

Add the following workflow file to `.forgejo/workflows/opencode.yml` in your repo.

### Manual setup

1. **Create a PAT**

   Go to your Forgejo instance → Settings → Applications → Generate Token. Give it `repo` scope (contents, pull-requests, issues).

2. **Add the PAT as a secret**

   Go to your repository → Settings → Actions → Secrets → New Repository Secret. Add:

   | Secret name | Value |
   |---|---|
   | `FORGEJO_TOKEN` | Your PAT |
   | `NOMYO_API_KEY` | Your Nomyo API key |

3. **Add the workflow file**

   Create `.forgejo/workflows/opencode.yml`:

   ```yaml
   name: opencode
   on:
     issue_comment:
       types: [created]
     pull_request_review_comment:
       types: [created]

   jobs:
     opencode:
       if: |
         contains(github.event.comment.body, '/oc') ||
         contains(github.event.comment.body, '/opencode')
       runs-on: ubuntu-latest
       permissions:
         id-token: write
         contents: write
         pull-requests: write
         issues: write
       steps:
         - uses: actions/checkout@v6
           with:
             fetch-depth: 1
             persist-credentials: false

         - name: Run opencode
           uses: bitfreedom/opencode/forgejo@latest
           env:
             NOMYO_API_KEY: ${{ secrets.NOMYO_API_KEY }}
           with:
             model: anthropic/claude-sonnet-4-20250514
             forgejo_api_url: https://git.your-instance.com
             forgejo_token: ${{ secrets.FORGEJO_TOKEN }}
   ```

4. **Set the model**

   Replace `anthropic/claude-sonnet-4-20250514` with your preferred model format: `provider/model`.

## Configuration

| Input | Required | Description |
|---|---|---|
| `model` | Yes | Model to use (format: `provider/model`) |
| `forgejo_api_url` | No | Forgejo instance API URL (e.g., `https://git.example.com`). Defaults to `https://git.bitfreedom.at` |
| `forgejo_token` | No | Forgejo PAT with repo scope |
| `agent` | No | Agent to use (must be a primary agent) |
| `share` | No | Share the opencode session (defaults to true for public repos) |
| `prompt` | No | Custom prompt to override default behavior |
| `mentions` | No | Comma-separated trigger phrases. Defaults to `/opencode,/oc` |
| `variant` | No | Model variant (e.g., `high`, `max`, `minimal`) |

## Supported Events

| Event Type | Triggered By | Details |
|---|---|---|
| `issue_comment` | Comment on an issue or MR | Mention `/opencode` or `/oc` in your comment |
| `pull_request_review_comment` | Comment on specific PR/MR code lines | Mention `/opencode` or `/oc` when reviewing code |

## Examples

### Explain an issue

```
/opencode explain this issue
```

### Fix an issue

```
/opencode fix this
```

### Review MRs

```
/opencode review this merge request
```

## Development

To test locally:

1. Set up environment:

```bash
export FORGEJO_API_URL="https://git.your-instance.com"
export FORGEJO_TOKEN="your-pat-here"
export MODEL="anthropic/claude-sonnet-4-20250514"
export GITHUB_RUN_ID="test"
export GITHUB_REPOSITORY="owner/repo"
export GITHUB_ACTOR="testuser"
export GITHUB_EVENT_NAME="issue_comment"
export GITHUB_EVENT_PATH="/tmp/event.json"
```

2. Create a mock event payload in `/tmp/event.json`:

```json
{
  "eventName": "issue_comment",
  "repo": { "owner": "owner", "repo": "repo" },
  "actor": "testuser",
  "payload": {
    "issue": { "number": 1, "index": 1, "title": "Test issue", "body": "Test body" },
    "comment": { "id": 1, "body": "/opencode fix this" }
  }
}
```

3. Run:

```bash
bun index.ts
```

## License

MIT