feat(skills): modernize capability-writing with Anthropic best practices
Updates capability-writing skill with progressive disclosure structure based on
Anthropic's January 2025 documentation. Implements Haiku-first approach (12x
cheaper, 2-5x faster than Sonnet).
Key changes:
- Add 5 core principles: conciseness, progressive disclosure, script bundling,
degrees of freedom, and Haiku-first model selection
- Restructure with best-practices.md, templates/, examples/, and reference/
- Create 4 templates: user-invocable skill, background skill, agent, helper script
- Add 3 examples: simple workflow, progressive disclosure, with scripts
- Add 3 reference docs: frontmatter fields, model selection, anti-patterns
- Update create-capability to analyze complexity and recommend structures
- Default all new skills/agents to Haiku unless justified
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Hugo Nijhuis
f424a7f992
