feat(cli): add OpenCode agent support via ACP #479
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Add full OpenCode CLI integration using the Agent Client Protocol (ACP), enabling Happy Coder to work with OpenCode as an alternative backend. New files: - cli/src/opencode/constants.ts - Environment variables and model constants - cli/src/opencode/runOpenCode.ts - Main entry point for OpenCode sessions - cli/src/agent/factories/opencode.ts - Backend factory for ACP - cli/src/agent/transport/handlers/OpenCodeTransport.ts - Transport handler - cli/src/ui/ink/OpenCodeDisplay.tsx - Terminal UI component Usage: happy opencode # Start OpenCode mode OPENCODE_API_KEY=... # Or ANTHROPIC_API_KEY OPENCODE_MODEL=... # Optional model override Supported models: - anthropic/claude-sonnet-4-20250514 (default) - anthropic/claude-opus-4-20250514 - openai/gpt-4o - openai/o1 - google/gemini-2.5-pro
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| session.sendAgentMessage('opencode', { | ||
| type: 'task_complete', | ||
| id: randomUUID(), | ||
| }); |
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The OpenCode loop ends a turn by emitting task_complete, but it never clears the GeminiDiffProcessor state (it is only reset on abort). Because the diff processor caches per-path diffs to suppress duplicates, keeping that cache across turns can suppress legitimate diff updates when a later turn produces the same patch (e.g., retrying or undo/redo), and it can grow unbounded over long sessions. Consider resetting the diff processor at the same point you send task_complete so each turn starts with a clean diff state.
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Ok, thank you for taking a shot at this and getting it working. I think you and @leeroybrun are doing the same thing with opencode. I don't know enough about the various opencode PRs tonight, but I will tomorrow. |
- Increase init timeout from 60s to 120s (OpenCode loads many plugins) - Filter OpenCode-specific log messages (service=, bun output, plugin loading) - Prevents JSON-RPC parsing failures from debug output
The cwd is already passed via spawn options, passing it again as an argument could cause issues with duplicate path handling.
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Summary
Add full OpenCode CLI integration using the Agent Client Protocol (ACP), enabling Happy Coder to work with OpenCode as an alternative backend.
Changes
New Files
cli/src/opencode/constants.ts- Environment variables and model constantscli/src/opencode/runOpenCode.ts- Main entry point for OpenCode sessions (~730 lines)cli/src/agent/factories/opencode.ts- Backend factory for ACPcli/src/agent/transport/handlers/OpenCodeTransport.ts- Transport handlercli/src/ui/ink/OpenCodeDisplay.tsx- Terminal UI componentModified Files
cli/src/index.ts- Addhappy opencodesubcommandcli/src/agent/factories/index.ts- Export opencode factorycli/src/agent/transport/handlers/index.ts- Export opencode transportcli/src/agent/transport/index.ts- Export opencode transportcli/src/utils/createSessionMetadata.ts- Add 'opencode' flavor typeUsage
Supported Models
anthropic/claude-sonnet-4-20250514(default)anthropic/claude-opus-4-20250514openai/gpt-4oopenai/o1google/gemini-2.5-proImplementation Details
The implementation follows the same patterns established by the Gemini integration:
Testing
npm run build)happy opencodeoption