Lists multiple specific concrete actions: 'Create or update a CONSTITUTION.md', 'defines project governance', 'establishes coding standards, quality gates, TDD policy, review requirements, and non-negotiable development principles with versioned amendment tracking'.

Clearly answers both what ('Create or update a CONSTITUTION.md that defines project governance...') and when ('Use when defining project rules, setting up coding standards, establishing quality gates, configuring TDD requirements, or creating non-negotiable development principles').

Includes natural keywords users would say: 'project rules', 'coding standards', 'quality gates', 'TDD requirements', 'development principles'. These are terms developers naturally use when setting up project governance.

Clear niche focused specifically on CONSTITUTION.md and project governance documents. The specific file type and governance-focused terminology (TDD policy, review requirements, amendment tracking) make it unlikely to conflict with general coding or documentation skills.

The skill is lean and efficient, avoiding explanations of concepts Claude already knows. Every section serves a purpose with no padding or unnecessary context about what constitutions are or why governance matters.

Provides concrete, executable commands (bash scripts, git commands), specific file paths, and clear validation steps. The workflow includes copy-paste ready commands and explicit error handling paths.

Clear numbered sequence with explicit validation checkpoints (prerequisites check, consistency check, phase separation validation). Includes feedback loops for validation failures and clear error recovery paths ('If FAIL... show details, suggest re-running').

Well-structured with clear references to external files (templates, references) that are one level deep and clearly signaled. Content is appropriately split between the skill overview and referenced materials like phase-separation-rules.md and templates.