Creates a skill that teaches how to design and create capabilities (skill + command + agent combinations) for the architecture repository. Includes: - Component templates for skills, commands, and agents - Decision tree and matrix for when to use each component - Model selection guidance (haiku/sonnet/opus) - Naming conventions and anti-patterns to avoid - References to detailed documentation in docs/ - Checklists for creating each component type Closes #74 Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>