GitHub official Spec Kit: Specification-driven development tool v1.2.1 released, first write the specification and then write the code, AI programming no longer deviatesGitHub 官方 Spec Kit：规格驱动开发工具 v1.2.1 发布，先写规格再写码，AI 编程不再跑偏

Directly throwing a sentence of demand to AI programming, the output is often far from the expected: the demand itself is ambiguous, and AI likes to complete it on its own.

The idea of Spec Kit is Spec-Driven Development: First, write "what to do, why, what are the constraints" into a structured specification document. AI performs every step against the specification, and the ambiguity is eliminated at the specification writing stage.

It is the official project of GitHub and can be used with mainstream agents such as Claude Code, Codex, Gemini CLI, Cursor, etc.

specify init Project Name: Initialize the project and select the AI agent you are using to automatically generate the .specify directory and supporting commands.

Seven-step command flow:/speckit.constitution defined project principles→/speckit.specify written specifications→/speckit.clarify clarified→/speckit.plan defined→/speckit.tasks task removal→/speckit.analyze consistency check→/speckit.implement generation implementation.

v1.2.1 Added extended catalog and workflow output capture, PowerShell 5.1 compatibility was also optimized, and Windows users were smoother.

Recommended uv tool install: uv tool install specify-cli --from git + https://github.com/github/spec-kit.git @ v1.2.1.

Python users can also directly pip install the official PyPI sdist source code package provided in this article. The offline environment can be unzipped and installed first.

After installing and executing the specify init my-project verification, the project skeleton description can be generated and installed successfully.

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