How do I install the Speckit Extension skill?

Run npx skillmds@latest add github/speckit-extension in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Speckit Extension safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Speckit Extension?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Speckit Extension free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Speckit Extension?

GitHub (Microsoft) (@github) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Speckit Extension by github — Agent Skill

Name: Speckit Extension
Author: GitHub (Microsoft)

Speckit Extension

Manage Spec Kit extensions via `specify extension`. USE FOR: installing/removing/updating spec-kit extensions, searching the extension catalog, showing extension info, enabling/disabling extensions, setting extension resolution priority, managing extension catalogs. DO NOT USE FOR: presets (use speckit-preset), bundles (use speckit-bundle), or workflows (use speckit-workflow).

GitHub (Microsoft) 486a364 2.6 KB Updated Sep 17, 2026 36.2k repo stars

File contents

Spec Kit — extensions

Manage spec-kit extensions with the Specify CLI specify extension command group. Extensions add reusable commands/hooks to a spec-kit project.

Prerequisite: needs the specify CLI. If specify --version fails, install it with the speckit-cli-setup skill first.

When to use

Find, install, update, or remove a spec-kit extension.
Temporarily enable/disable an extension or adjust its resolution priority.
Add or manage extension catalog sources.

How to invoke

# Discover
specify extension list
specify extension search <query>
specify extension info <name>

# Install
specify extension add <name>
specify extension add <name> --force            # overwrite if already installed
specify extension add <path> --dev              # install from a local directory
specify extension add <name> --from <url>       # install from a custom URL
specify extension add <name> --priority <n>     # lower number = higher precedence

# Lifecycle
specify extension update [<name>]               # update one or all extensions
specify extension enable <name>
specify extension disable <name>
specify extension set-priority <name> <n>
specify extension remove <name>

# Catalogs (sources extensions are resolved from)
specify extension catalog list
specify extension catalog add <https-url> --name <name> [--install-allowed] [--priority <n>] [--description <text>]
specify extension catalog remove <name>

Extension catalog URLs must use HTTPS. New catalogs are not install-allowed by default — pass --install-allowed to permit installing extensions from them.

Notes

Resolution priority: lower number = higher precedence (default 10).
Prefer specify extension search first so you install the correct extension ID.
--dev is for local development of an extension; point it at the extension's source directory.
When the project was initialized in skills mode (see the speckit-init skill), an installed extension's commands land as .github/skills/speckit-<cmd>/SKILL.md. To make Copilot pick up the new skills in the current session, run /skills reload (no restart needed). They are also loaded automatically on the next session start.

---name: speckit-extensiondescription: Manage Spec Kit extensions via `specify extension`. USE FOR: installing/removing/updating spec-kit extensions, searching the extension catalog, showing extension info, enabling/disabling extensions, setting extension resolution priority, managing extension catalogs. DO NOT USE FOR: presets (use speckit-preset), bundles (use speckit-bundle), or workflows (use speckit-workflow).---# Spec Kit — extensionsManage spec-kit extensions with the **Specify CLI** `specify extension` commandgroup. Extensions add reusable commands/hooks to a spec-kit project.> **Prerequisite:** needs the `specify` CLI. If `specify --version` fails, install it> with the **speckit-cli-setup** skill first.## When to use- Find, install, update, or remove a spec-kit extension.- Temporarily enable/disable an extension or adjust its resolution priority.- Add or manage extension catalog sources.## How to invoke```bash# Discoverspecify extension listspecify extension search <query>specify extension info <name># Installspecify extension add <name>specify extension add <name> --force # overwrite if already installedspecify extension add <path> --dev # install from a local directoryspecify extension add <name> --from <url> # install from a custom URLspecify extension add <name> --priority <n> # lower number = higher precedence# Lifecyclespecify extension update [<name>] # update one or all extensionsspecify extension enable <name>specify extension disable <name>specify extension set-priority <name> <n>specify extension remove <name># Catalogs (sources extensions are resolved from)specify extension catalog listspecify extension catalog add <https-url> --name <name> [--install-allowed] [--priority <n>] [--description <text>]specify extension catalog remove <name>```> Extension catalog URLs must use **HTTPS**. New catalogs are **not** install-allowed> by default — pass `--install-allowed` to permit installing extensions from them.## Notes- Resolution priority: **lower number = higher precedence** (default `10`).- Prefer `specify extension search` first so you install the correct extension ID.- `--dev` is for local development of an extension; point it at the extension's source directory.- When the project was initialized in **skills mode** (see the speckit-init skill), an installed extension's commands land as `.github/skills/speckit-<cmd>/SKILL.md`. To make Copilot pick up the new skills **in the current session**, run **`/skills reload`** (no restart needed). They are also loaded automatically on the next session start.

Frequently asked questions