devin-plugin-cc

# Devin Plugin for Claude Code and Codex

> Open-source Claude Code plugin and portable agent integration for Devin AI code review, task delegation, cloud handoffs, and Fusion sidekick workflows.

## Summary

`devin-plugin-cc` connects Claude Code, Codex, and other coding agents to the local Devin CLI and Devin API. It provides read-only reviews, adversarial reviews, delegated coding tasks, resumable job control, cloud handoffs, and a Fusion workflow where a frontier model leads while Devin handles bounded mechanical work.

## Primary documentation

- [README](README.md): installation, capabilities, commands, Fusion, FAQ, and development.
- [AGENTS.md](AGENTS.md): universal CLI contract and cross-agent integration guidance.
- [Devin skill](skills/devin/SKILL.md): portable runtime commands for Codex and other agents.
- [Fusion skill](skills/fusion/SKILL.md): GPT 6 Astra lead and Devin sidekick workflow for Codex.
- [Claude Fusion command](plugins/devin/commands/fusion.md): Claude Opus 5.5 lead and Devin sidekick workflow.
- [Companion CLI](plugins/devin/scripts/devin-companion.mjs): shared runtime dispatcher.

## Installation

```bash
git clone https://github.com/TheOnlyFusionCube/devin-plugin-cc
cd devin-plugin-cc
npm install
npm run doctor
```

Claude Code uses `/plugin marketplace add .` and `/plugin install devin@devin-plugin-cc`, or the shell equivalents `claude plugin marketplace add TheOnlyFusionCube/devin-plugin-cc` and `claude plugin install devin@devin-plugin-cc`. Codex installs natively with `codex plugin marketplace add TheOnlyFusionCube/devin-plugin-cc` then `codex plugin add devin@devin-plugin-cc`, or just the two portable skills with `npx skills add TheOnlyFusionCube/devin-plugin-cc -a codex -g -s devin -s fusion -y`. The Devin CLI installs it with `devin plugins install TheOnlyFusionCube/devin-plugin-cc#plugins/devin`.

## Capabilities

- AI code review and adversarial review.
- Delegated local Devin tasks with resume, status, result, and cancel controls.
- Cloud Devin handoffs through `DEVIN_API_KEY`.
- Claude Code `/devin:fusion` and Codex `$fusion` lead/sidekick workflows.

## Compatibility

Node.js 18.18 or newer. Git provides review context and handoff diffs (both degrade gracefully without it). Local commands require an authenticated Devin CLI (on macOS, the CLI bundled with Devin Desktop is detected automatically when `devin` is not on PATH); cloud handoffs require `DEVIN_API_KEY` instead of the CLI.