OpenSpec Claude Skill

A lightweight specification workflow that aligns a proposed change, its design and tasks before implementation.

Published by Fission-AIFission-AI/OpenSpec

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Install

Pick your client, then copy the command.

Claude Code

No Claude Code snippet verified for this entry yet

Compatibility is not confirmed, so there is no copy-ready command. Start from the pinned checkout and follow the source docs for where the folder goes.

Pinned checkout (same for every client)

git clone 'https://github.com/Fission-AI/OpenSpec.git'
cd OpenSpec && git checkout 6d04a1b58dedc95729d34e4f223d9d483aae210a

Read pinned setup documentation

Codex

No Codex snippet verified for this entry yet

Compatibility is not confirmed, so there is no copy-ready command. Start from the pinned checkout and follow the source docs for where the folder goes.

Pinned checkout (same for every client)

git clone 'https://github.com/Fission-AI/OpenSpec.git'
cd OpenSpec && git checkout 6d04a1b58dedc95729d34e4f223d9d483aae210a

Read pinned setup documentation Codex skills documentation

Cursor

No Cursor snippet verified for this entry yet

Compatibility is not confirmed, so there is no copy-ready command. Start from the pinned checkout and follow the source docs for where the folder goes.

Pinned checkout (same for every client)

git clone 'https://github.com/Fission-AI/OpenSpec.git'
cd OpenSpec && git checkout 6d04a1b58dedc95729d34e4f223d9d483aae210a

Read pinned setup documentation

Setup

Terminal; replace project path; select Claude Code, Codex or Cursor in init

npm install -g @fission-ai/openspec@latest
cd your-project
openspec init

Git

Check out the pinned revision

git clone 'https://github.com/Fission-AI/OpenSpec.git'
cd OpenSpec && git checkout 6d04a1b58dedc95729d34e4f223d9d483aae210a

Any agent

Paste into your agent chat

Read the source at https://github.com/Fission-AI/OpenSpec/blob/6d04a1b58dedc95729d34e4f223d9d483aae210a/README.md (pinned revision 6d04a1b58ded). Explain what it does and which tools, credentials and network access it needs. Do not install or run anything until I confirm.

How to install Claude Code skills: compare folder, plugin and CLI methods

All client instructions (works without JavaScript)

Claude Code

No dedicated setup snippet verified for this client. Review the shared setup and pinned source below; compatibility is not confirmed.

Read pinned source

Codex

No dedicated setup snippet verified for this client. Review the shared setup and pinned source below; compatibility is not confirmed.

Read pinned source

Cursor

No dedicated setup snippet verified for this client. Review the shared setup and pinned source below; compatibility is not confirmed.

Read pinned source

Setup

Terminal; replace project path; select Claude Code, Codex or Cursor in init

npm install -g @fission-ai/openspec@latest
cd your-project
openspec init

Git

Check out the pinned revision

git clone 'https://github.com/Fission-AI/OpenSpec.git'
cd OpenSpec && git checkout 6d04a1b58dedc95729d34e4f223d9d483aae210a

Any agent

Paste into your agent chat

Read the source at https://github.com/Fission-AI/OpenSpec/blob/6d04a1b58dedc95729d34e4f223d9d483aae210a/README.md (pinned revision 6d04a1b58ded). Explain what it does and which tools, credentials and network access it needs. Do not install or run anything until I confirm.

Listed ≠ audited. Snippets follow the pinned source docs; review the source and any scripts before running them. Nothing is installed from this page.

Source record

Repository: Fission-AI/OpenSpec
Source file: README.md
Pinned revision: 6d04a1b
Upstream commit: 24 Oct 2026
Last checked: 24 Oct 2026
Stars at check: 72870 (2026-10-24)
Repository created: 2025-08-05
Default branch: main
License: MIT

No review scores. No automatic installs. Not affiliated with the publisher.

Inspect companion skills in this collection

What you are opening

A lightweight specification workflow that aligns a proposed change, its design and tasks before implementation.

How to set it up

Read the pinned README, license and companion scripts.
Choose a documented setup below; review dependencies and any configuration changes before running it.
Try one small task in a test workspace and review the result.

Requirements and third-party terms

Use the CLI to generate your chosen agent integration. npm installation needs Node.js 20.19+; inspect package code before running.

Before you add it

Read the instructions and review any scripts before running them.
Check tool access, required credentials and third-party network requests.
The source license and any resource-specific terms take precedence.

What you are opening

How to set it up

Requirements and third-party terms

Before you add it

Other Claude skills