Canonical Format Checker

Overview

Prevent format drift by verifying content follows authoritative canonical sources. When teaching a pattern that exists elsewhere in the platform (skills, subagents, ADRs, etc.), this skill ensures the taught format matches the canonical source.

Why this matters: The Chapter 14 format drift failure occurred because the lesson taught skill format differently from Chapter 5 (canonical source). Students learned incorrect patterns that contradicted earlier chapters.

When to Use This Skill

Automatic Triggers (check before implementation):

• Lesson teaches how to create skills → Check .claude/skills/ structure
• Lesson teaches how to write subagents → Check .claude/agents/ structure
• Lesson teaches ADR format → Check specs/*/adrs/ structure
• Lesson teaches PHR format → Check history/prompts/ structure
• Lesson teaches specification format → Check specs/*/spec.md structure