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GitHub Spec Kit
GitHub's open-source toolkit (specify CLI plus slash-command skills) for constitution -> specify -> plan -> tasks -> implement -> converge, now with extensions, presets, workflows and catalogs.
specify-cli v1.2.3 released 2026-10-22; repo pushed 2026-10-23; ~143k stars (GitHub API, 2026-10-25) (checked 2026-10-25)
In Spec-driven development
Where it stands apart
- How is it mainly sustained? big company side project (6% of 18 others)
- Once code exists, what is the spec? the source: changes start in the spec and code follows (5% of 19 others)
- What does it offer teams beyond sharing files in git? (if both, pick the paid product) team features in the open-source tool (shared spec stores, multi-developer or multi-agent coordination) (11% of 18 others)
What it shares with most of the community
- Is it actively maintained? active (74% of 19 others)
- How is the main thing licensed? permissive open source (MIT/Apache/BSD) (74% of 19 others)
- Can it run entirely on your own device or infrastructure, without the maker's servers? yes (79% of 19 others)
- Do you need an account to use it? no account (74% of 19 others)
- Who is it for? developers (100% of 19 others)
- What format are specs written in? markdown from templates or free-form (67% of 18 others)
- Where do specs live? plain files in the project repository (89% of 19 others)
- Which coding agents does it work with? many agents (five or more) (78% of 18 others)
- How is the path from idea to code structured? a fixed sequence of phases (e.g. requirements, design, tasks) (53% of 19 others)
- By default, once a plan is approved, how is implementation run? the human drives it, phase by phase or task by task (50% of 18 others)
Nearest neighbors
- PRP (Product Requirement Prompts) 76% of 17 shared answers match
- GSD (Get Shit Done) / GSD Core 75% of 16 shared answers match
- BMAD Method 71% of 17 shared answers match
Every answer
| Question | Answer | Source |
|---|---|---|
| Is it actively maintained? | active | source 2026-10-25 |
| How is the main thing licensed? | permissive open source (MIT/Apache/BSD) MIT | source 2026-10-25 |
| How is it mainly sustained? | stands apart big company side project Maintained under the github org; no paid tier. | source 2026-10-25 |
| Can it run entirely on your own device or infrastructure, without the maker's servers? | yes Docs cover offline/air-gapped use with local and self-hosted catalogs. | source 2026-10-25 |
| Do you need an account to use it? | no account uv-installed CLI scaffolds templates; no GitHub or other account needed beyond your chosen agent. | source 2026-10-26 |
| Who is it for? | developers | source 2026-10-25 |
| Which shared standard or format does it mainly build on? | Agent Skills (SKILL.md) Its workflow runs as skills in the agent; spec/plan/tasks templates are its own. | source 2026-10-26 |
| Once code exists, what is the spec? | stands apart the source: changes start in the spec and code follows spec-driven.md: 'Specifications don't serve code - code serves specifications'; specs are 'the central source of truth'. In practice code is generated via plan/tasks, not regenerated. | source 2026-10-25 |
| After implementation, what built-in step keeps specs and code aligned? (if several, the first that applies) | a step checks code against the spec (tests, review, or verifier) /speckit-converge assesses code against spec/plan/tasks and appends gap tasks; it never updates the spec itself. | source 2026-10-25 |
| What format are specs written in? | markdown from templates or free-form Markdown templates (spec.md, plan.md, tasks.md) plus a constitution. | source 2026-10-25 |
| Where do specs live? | plain files in the project repository specs/ and .specify/ in the repo. | source 2026-10-25 |
| Which coding agents does it work with? | many agents (five or more) | source 2026-10-25 |
| What form does it mainly ship in? | prompts, skills, or slash commands installed into an agent (even if a CLI installs them) specify CLI scaffolds and installs the skills/commands you run in your agent; process runs in agent chat. | source 2026-10-26 |
| How is the path from idea to code structured? | a fixed sequence of phases (e.g. requirements, design, tasks) SDD flow is a fixed sequence; README says bug-fix and assess processes are independent entry points. | source 2026-10-25 |
| Does a human approve the spec or plan before code is written? | review is recommended but not enforced 'reviewing each result before continuing' - advised, not enforced. | source 2026-10-25 |
| By default, once a plan is approved, how is implementation run? | the human drives it, phase by phase or task by task User runs each skill; implement/converge loop repeated by the user. Workflows extension can automate. | source 2026-10-25 |
| What does it offer teams beyond sharing files in git? (if both, pick the paid product) | stands apart team features in the open-source tool (shared spec stores, multi-developer or multi-agent coordination) Presets for organizational standards, private catalogs, bundles for teams - all in the open-source tool. | source 2026-10-25 |
Sources
This page was derived from:
- GitHub · github.com/github/spec-kit · read 2026-10-25
- GitHub · github.com/github/spec-kit/blob/main/LICENSE · read 2026-10-25
- GitHub · github.com/github/spec-kit/blob/main/spec-driven.md · read 2026-10-25
- GitHub · github.com/github/spec-kit/releases · read 2026-10-25
- Web page · github.github.io/spec-kit/install/air-gapped.html · read 2026-10-25
- Web page · github.github.io/spec-kit/integrations/index.html · read 2026-10-25
- Web page · github.github.io/spec-kit/reference/agentic-sdd.html · read 2026-10-25
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