Create docs/writing-commands.md with comprehensive documentation for
writing new commands:
- File structure (commands/<name>.md with YAML frontmatter)
- Argument handling with $1, $2 placeholders and argument-hint patterns
- How commands invoke skills and spawn agents
- Interactive patterns: approval workflows, choices, input gathering
- Annotated examples from all 7 existing commands
- Naming conventions and best practices
- Submission checklist
Closes#5🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
