Development Crew

Four specialists that don't just write code: they think about it, challenge you, design it, build it, and hold it accountable.

A skills-first development workflow — four specialist skills that coordinate structured software development from idea to reviewed code, on-demand and pipeline-native.

Quickstart

Give your agent Development Crew: Claude Code, Codex CLI, Codex App, OpenCode, Cursor, Gemini CLI, GitHub Copilot CLI, oh-my-pi.

How it works

Development Crew is a pipeline-first workflow: four specialist skills hand off to each other like a relay race, each one knowing exactly what to expect from the previous and what to produce for the next.

You start with a rough idea. The Rubber Duck challenges your assumptions and helps you shape it into a clear problem statement. The Architect formalizes the design into a precise, buildable spec. The Implementer writes production code and tests against that spec. The Code Reviewer inspects everything for bugs, edge cases, and architectural compliance before anything ships.

Each skill can be loaded independently — jump in at any point. But when you run the full pipeline, you get a structured, reviewable path from vague idea to verified code.

Installation

Installation differs by harness. If you use more than one, install Development Crew separately for each one.

Claude Code

• Add the marketplace:

  claude plugin marketplace add marcelorodrigo/development-crew
  

• Install the plugin:

  claude plugin install development-crew@development-crew-plugin
  

• Verify:

  /development-crew:rubber-duck
  

Codex CLI

Add the repository as a plugin marketplace, then install Development Crew:

codex plugin marketplace add marcelorodrigo/development-crew
codex plugin add development-crew@development-crew-plugin

Start a new Codex session, then verify the installation with /skills or invoke a skill directly:

$rubber-duck

Codex App

• In the Codex app, click Plugins in the sidebar.
• Search for "Development Crew" in the marketplace.
• Click Install.

OpenCode

Install the latest release globally:

opencode plugin @marcelorodrigo/opencode-development-crew@latest --global

Or add the package to the plugin array in your global or project-level opencode.json:

{
  "plugin": ["@marcelorodrigo/opencode-development-crew@latest"]
}

OpenCode installs the published npm package from this entry. Restart OpenCode after adding or changing the plugin configuration.

The @latest tag resolves to the latest published release. The plugin also performs a best-effort update check in the background. For an eligible floating npm wrapper, it checks npm, installs and reifies the exact newer release, and then shows a toast asking you to restart OpenCode. Before updating, the plugin snapshots the skills outside the mutable package wrapper so OpenCode can still discover and read SKILL.md files safely.

Exact-pinned, local, and Git installs are not auto-updated. Restart OpenCode to activate newly installed code. Update failures are non-fatal and do not prevent the plugin from starting.

If an older destructive updater left a stale @latest wrapper, install the fixed release explicitly through OpenCode's plugin manager, using the same scope as the original entry, then restart OpenCode:

opencode plugin @marcelorodrigo/opencode-development-crew@<fixed-version> --global --force

Replace <fixed-version> with the first release containing this updater fix. For a project-level entry, omit --global and run the command from that project. This temporarily pins the plugin; change its config entry back to @latest afterward if you want future automatic updates. Do not remove arbitrary cache or package paths manually.

To use the repository directly instead of npm:

{
  "plugin": ["development-crew@git+https://github.com/marcelorodrigo/development-crew.git"]
}

Or fetch install instructions:

Fetch and follow instructions from https://raw.githubusercontent.com/marcelorodrigo/development-crew/master/OPENCODE_INSTALL.md

Cursor

Add to your .cursor/plugins.json:

{
  "plugins": ["development-crew@git+https://github.com/marcelorodrigo/development-crew.git"]
}

Gemini CLI

gemini extensions install https://github.com/marcelorodrigo/development-crew

GitHub Copilot CLI

• Add the marketplace:

  copilot plugin marketplace add marcelorodrigo/development-crew
  

• Install:

  copilot plugin install development-crew@development-crew-plugin
  

oh-my-pi

• Add the marketplace:

  omp plugin marketplace add marcelorodrigo/development-crew
  

• Install the plugin:

  omp plugin install development-crew@development-crew-plugin
  

• Verify:

  /skill:rubber-duck
  

The Pipeline

Use OpenCode's native skill tool. In current OpenCode versions, discovered skills are also exposed as slash entries when no existing command has the same name:

/rubber-duck
/architect
/implementer
/code-reviewer

The slash entries come from OpenCode's skill discovery; this plugin does not register custom commands. If a slash entry is unavailable, use the native skill tool:

1. rubber-duck - Activates before writing code. Challenges assumptions, explores alternatives, asks the questions nobody else will. Produces a structured Brainstorm Brief.

2. architect - Activates with a clear direction or Brainstorm Brief. Applies the style appropriate to your tech stack. Names every class, places every file, defines every boundary. Produces a precise Architecture Spec.

3. implementer - Activates with an Architecture Spec. Writes production code and tests that match the project's conventions. Does not add features that weren't asked for. Runs the build until it passes. Produces an Implementation Summary.

4. code-reviewer - Activates with implemented code. Diffs against the default branch. Validates against the spec, project conventions, and loaded skills. Finds bugs, edge cases, architectural violations. Produces a Code Review with categorized findings and a verdict.

The agent checks for relevant skills before every task. Mandatory workflows, not suggestions.

What's Inside

Core Skills

• rubber-duck — Brainstorming sparring partner. Assumption-challenging, solution-space widening.
• architect — Architecture formalizer. Component design, package structure, API contracts, error handling.
• implementer — Builder. Production code, tests, build verification, convention matching.
• code-reviewer — Code review specialist. Architecture compliance, bug detection, security, test quality.
• shared-principles — Cross-cutting design principles followed by all technical specialists.

Bootstrap

• using-development-crew — Orientation skill injected into every new session. Tells the agent about the pipeline, when to invoke each specialist, and how skills coordinate.

Philosophy

• Pipeline over chaos — Structured handoffs beat ad-hoc coding
• Design before code — No implementation without a spec
• Review before merge — No merge without review
• Precision over preference — Name every component, every contract
• Evidence over claims — Run the build, verify the tests

Contributing

1. Fork the repository
2. Switch to the master branch
3. Create a branch for your work
4. Run pnpm install --frozen-lockfile
5. Run pnpm run test and node scripts/validate-skills.mjs to verify
6. Submit a PR against master

Updating

• Claude Code: claude plugin update development-crew@development-crew-plugin

• GitHub Copilot: copilot plugin update development-crew@development-crew-plugin

• Gemini: gemini extensions update https://github.com/marcelorodrigo/development-crew

• oh-my-pi: omp plugin upgrade development-crew@development-crew-plugin

• OpenCode: The @latest npm plugin entry checks npm in the background and installs the exact newer release into the eligible floating wrapper. Skills are snapshotted outside the mutable wrapper before the update. Restart OpenCode after the notification to activate the new code. Exact-pinned, local, and Git installs are not auto-updated, and update failures are non-fatal.

License

MIT — see LICENSE for details.

Community

Built by Marcelo Rodrigo.

• Issues: https://github.com/marcelorodrigo/development-crew/issues
• Release announcements: Watch the repo on GitHub