[2.15.2] Fix skill spec compliance across all skills

Fixed issues flagged by skill-creator spec:
- Reference files now use proper markdown links instead of backtick text
- Descriptions use third person ("This skill should be used when...")
- Added Skill Compliance Checklist to CLAUDE.md with validation commands

Affected skills: agent-native-architecture, andrew-kane-gem-writer,
compound-docs, create-agent-skills, dhh-rails-style, dhh-ruby-style,
dspy-ruby, every-style-editor, file-todos, frontend-design, gemini-imagegen

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugins/compound-engineering/skills/every-style-editor/SKILL.md

@@ -44,7 +44,7 @@ Review each paragraph systematically, checking for:
 - Word choice and usage (overused words, passive voice)
 - Adherence to Every style guide rules
 
-Reference the complete `EVERY_WRITE_STYLE.md` for specific rules when in doubt.
+Reference the complete [EVERY_WRITE_STYLE.md](./references/EVERY_WRITE_STYLE.md) for specific rules when in doubt.
 
 ### Step 3: Mechanical Review
 
@@ -99,7 +99,7 @@ FINAL RECOMMENDATIONS
 
 ## Style Guide Reference
 
-The complete Every style guide is included in `references/EVERY_WRITE_STYLE.md`. Key areas to focus on:
+The complete Every style guide is included in [EVERY_WRITE_STYLE.md](./references/EVERY_WRITE_STYLE.md). Key areas to focus on:
 
 - **Quick Rules**: Title case for headlines, sentence case elsewhere
 - **Tone**: Active voice, avoid overused words (actually, very, just), be specific