How does this fit into the Spec Kit workflow?

The Constitution is Phase 0. It sets the rules that later phases (like Specify and Implement) must follow to ensure consistency across the entire development lifecycle.

How does the validation feature work?

The --validate argument causes the skill to scan your codebase and compare current patterns, file structures, and configurations against the rules defined in your constitution, reporting any misalignments.

When should I use the --update command?

Use --update when your project's technology stack or team conventions change, or when the skill detects 'drift' between your documented principles and your actual code.

Is the constitution file human-readable?

Yes, it is stored as a standard Markdown file, making it easy for developers to read in GitHub or their IDE while remaining structured enough for the AI to parse.

What is a project constitution?

A project constitution is a markdown file (.constitution.md) that defines the mission, core principles, and technical constraints that govern how a project is built and maintained.

Spec-Driven Constitution

Name: Spec-Driven Constitution
Author: melodic-software

bymelodic-software

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Productivity & Workflow

Establishes and enforces project principles, architectural constraints, and quality standards via a machine-readable constitution file.

The Constitution skill serves as Phase 0 of the Spec-Driven Development workflow, providing a structured way to codify a project's mission, technical constraints, and team conventions. It enables Claude to generate a .constitution.md file by analyzing your existing codebase, and more importantly, it allows for automated validation to ensure your implementation hasn't drifted from your core principles. This ensures that every future specification and code change remains aligned with your established architecture and quality benchmarks.

Key Features

01Standardized markdown structure for mission, principles, and team conventions

02Automated constitution generation based on codebase context and technology stack detection

03Support for updating existing constitutions as project requirements evolve

04Validation engine to identify violations of architectural constraints and quality standards

05Deep integration with the Spec Kit workflow for end-to-end spec-driven development

0638 GitHub stars

Use Cases

01Auditing legacy codebases to identify where current patterns deviate from intended standards

02Providing a clear, enforceable set of principles for AI-assisted coding and development

03Establishing 'ground truth' architectural rules for a new repository to prevent technical debt

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add melodic-software/claude-code-plugins constitution

For use in Claude.ai and ChatGPT

Download Skill