Spec Kit

license

MIT(OSI)

source

public

core features withheld

no

Fully MIT and free: the whole Spec-Driven Development toolkit is published, with no paid tier, enterprise directory or license key.

• https://github.com/github/spec-kit recorded 2026-08-13

  MIT license, full public source for the Spec-Driven Development toolkit, 127.2k stars and 11.4k forks; no paid tier or enterprise directory

• https://raw.githubusercontent.com/github/spec-kit/main/LICENSE recorded 2026-09-29

  The LICENSE file is the MIT License: "MIT License" and "Copyright GitHub, Inc." with the standard grant "Permission is hereby granted, free of charge, to any person obtaining a copy".

• https://raw.githubusercontent.com/github/spec-kit/main/pyproject.toml recorded 2026-09-29

  The package manifest bundles the whole toolkit into the free CLI: "Bundle core assets so `specify init` works without network access"; searched it and the README for pricing, license key and premium tier: none.

• https://raw.githubusercontent.com/github/spec-kit/main/README.md recorded 2026-09-29

  The README describes the project as public and freely licensed: "Spec Kit is an open source toolkit that gives AI coding agents structured" processes and states "Spec Kit is [MIT licensed](./LICENSE)."

Adoption is measured by PyPI downloads of specify-cli, whose version matches the repository's latest tag, confirming it is a live distribution channel rather than a stale mirror. A download count is preferred here over the repository's star count.

• https://pypistats.org/api/packages/specify-cli/recent recorded 2026-08-12

  76,423 downloads in the trailing 30 days for specify-cli

Methodology/orchestration layer over coding agents rather than a code-writing engine itself.

• https://github.blog/ai-and-ml/generative-ai/spec-driven-development-with-ai-get-started-with-a-new-open-source-toolkit/ recorded 2026-09-29

  The GitHub Blog introduces the toolkit as "a new open source toolkit" and walks the phases "Specify", "Plan", "Tasks" and "Implement".

• https://github.com/github/spec-kit recorded 2026-08-13

  'Define what to build before building it - with any AI coding agent'; the specify CLI scaffolding and chained Markdown artifacts; no benchmark figure

• https://raw.githubusercontent.com/github/spec-kit/main/docs/reference/integrations.md recorded 2026-09-29

  The integrations reference says "The Specify CLI supports a wide range of AI coding agents" and tabulates them, including Claude Code, Codex CLI, Cursor and Gemini CLI.

• https://raw.githubusercontent.com/github/spec-kit/main/README.md recorded 2026-09-29

  The README defines the workflow: "Constitution once per project; specify → plan → tasks → implement → converge per feature." and installs the CLI with "uv tool install specify-cli".