Spec Kit Copilot Plugin

A GitHub Copilot CLI skills plugin that exposes the Spec Kit specify command-line tool to the Copilot agent.

Instead of dispatching prompts to a separate agent, this plugin gives Copilot a set of focused skills — one per specify command group — so the agent knows when and how to drive the specify CLI on your behalf (scaffolding Copilot projects, managing extensions/presets/bundles, running workflows, and maintaining the CLI).

Status: active development. This is a companion to the agent-agnostic Spec Kit project, focused on making the Copilot CLI and Copilot App integration smoother.

Background

Spec Kit provides the specify CLI for Spec-Driven Development and is intentionally agent-agnostic. This repository delivers the Copilot companion: a skills plugin so Copilot CLI and Copilot App users get a first-class, guided experience driving specify without leaving the agent.

Contributions are welcome — see CONTRIBUTING.md to get started, and open issues for the current roadmap.

Skills

Skill	Wraps	Purpose
speckit-cli-setup	install / specify --version	Detect and install the specify CLI the other skills depend on
speckit-init	specify init	Scaffold a new Copilot spec-driven project (or --here)
speckit-check	specify check, specify version	Verify tools, report version/features
speckit-extension	specify extension …	Install/update/search spec-kit extensions (+ catalogs)
speckit-preset	specify preset …	Install/search/resolve presets (+ catalogs)
speckit-bundle	specify bundle …	Discover, install, update, and author bundles (+ catalogs)
speckit-workflow	specify workflow …	Run/resume/inspect automation workflows (+ catalogs)
speckit-workflow-step	specify workflow step …	Manage workflow step types (+ catalogs)
speckit-self	specify self …	Check for and apply CLI upgrades

Each skill is a SKILL.md (YAML frontmatter + Markdown body). The description field tells Copilot when to load the skill; the body documents the exact specify sub-commands, options, and usage notes. The plugin is described by the plugin.json manifest at the repository root.

Requirements

• GitHub Copilot CLI

• The Spec Kit specify CLI on your PATH:

  uv tool install specify-cli      # or: pipx install specify-cli
  specify --version

Versioning: this plugin tracks the Specify CLI version (lockstep). Plugin 0.11.8 targets specify 0.11.8; install or upgrade the matching CLI with specify self upgrade.

Installation

Via marketplace (recommended)

This repository ships a marketplace manifest at .github/plugin/marketplace.json. Register the marketplace, then install the plugin from it:

copilot plugin marketplace add OWNER/spec-kit-copilot
copilot plugin install spec-kit-copilot@spec-kit-marketplace

Local development install

Point copilot plugin install at this directory while iterating (note: direct path/URL installs are deprecated and may be removed in a future release):

copilot plugin install ./spec-kit-copilot

Verify it loaded:

copilot plugin list
# or, inside an interactive session:
/skills list

When iterating on the plugin locally, run copilot plugin install ./spec-kit-copilot again to refresh the cached components.

Uninstall with the plugin's name (from plugin.json), not its path:

copilot plugin uninstall spec-kit-copilot

Usage

Just talk to Copilot in natural language; it selects the matching skill and runs the right specify command. For example:

• "Initialize a spec-kit project here for Copilot" → speckit-init
• "Check my spec-kit environment" → speckit-check
• "Add the git extension" → speckit-extension
• "Run the taskstoissues workflow" → speckit-workflow
• "Install the platform-starter bundle" → speckit-bundle
• "Is there a newer specify release?" → speckit-self

Layout

spec-kit-copilot/
├── plugin.json              # Plugin manifest (required)
├── README.md
├── .github/plugin/
│   └── marketplace.json     # Marketplace manifest (for distribution)
└── skills/
    ├── speckit-cli-setup/SKILL.md
    ├── speckit-init/SKILL.md
    ├── speckit-check/SKILL.md
    ├── speckit-extension/SKILL.md
    ├── speckit-preset/SKILL.md
    ├── speckit-bundle/SKILL.md
    ├── speckit-workflow/SKILL.md
    ├── speckit-workflow-step/SKILL.md
    └── speckit-self/SKILL.md

License

This project is licensed under the terms of the MIT open source license. Please refer to the LICENSE file for the full terms.

Maintainers

This project is maintained by GitHub staff. See .github/CODEOWNERS for the current owners.

Support

See SUPPORT.md for how to get help and file issues. Please also review the Code of Conduct and Security Policy.

Acknowledgement

Built on top of Spec Kit and its specify CLI. Thanks to the Spec Kit team and community.