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+# Command Development Skill
+
+Comprehensive guidance on creating Claude Code slash commands, including file format, frontmatter options, dynamic arguments, and best practices.
+
+## Overview
+
+This skill provides knowledge about:
+- Slash command file format and structure
+- YAML frontmatter configuration fields
+- Dynamic arguments ($ARGUMENTS, $1, $2, etc.)
+- File references with @ syntax
+- Bash execution with !` syntax
+- Command organization and namespacing
+- Best practices for command development
+- Plugin-specific features (${CLAUDE_PLUGIN_ROOT}, plugin patterns)
+- Integration with plugin components (agents, skills, hooks)
+- Validation patterns and error handling
+
+## Skill Structure
+
+### SKILL.md (~2,470 words)
+
+Core skill content covering:
+
+**Fundamentals:**
+- Command basics and locations
+- File format (Markdown with optional frontmatter)
+- YAML frontmatter fields overview
+- Dynamic arguments ($ARGUMENTS and positional)
+- File references (@ syntax)
+- Bash execution (!` syntax)
+- Command organization patterns
+- Best practices and common patterns
+- Troubleshooting
+
+**Plugin-Specific:**
+- ${CLAUDE_PLUGIN_ROOT} environment variable
+- Plugin command discovery and organization
+- Plugin command patterns (configuration, template, multi-script)
+- Integration with plugin components (agents, skills, hooks)
+- Validation patterns (argument, file, resource, error handling)
+
+### References
+
+Detailed documentation:
+
+- **frontmatter-reference.md**: Complete YAML frontmatter field specifications
+  - All field descriptions with types and defaults
+  - When to use each field
+  - Examples and best practices
+  - Validation and common errors
+
+- **plugin-features-reference.md**: Plugin-specific command features
+  - Plugin command discovery and organization
+  - ${CLAUDE_PLUGIN_ROOT} environment variable usage
+  - Plugin command patterns (configuration, template, multi-script)
+  - Integration with plugin agents, skills, and hooks
+  - Validation patterns and error handling
+
+### Examples
+
+Practical command examples:
+
+- **simple-commands.md**: 10 complete command examples
+  - Code review commands
+  - Testing commands
+  - Deployment commands
+  - Documentation generators
+  - Git integration commands
+  - Analysis and research commands
+
+- **plugin-commands.md**: 10 plugin-specific command examples
+  - Simple plugin commands with scripts
+  - Multi-script workflows
+  - Template-based generation
+  - Configuration-driven deployment
+  - Agent and skill integration
+  - Multi-component workflows
+  - Validated input commands
+  - Environment-aware commands
+
+## When This Skill Triggers
+
+Claude Code activates this skill when users:
+- Ask to "create a slash command" or "add a command"
+- Need to "write a custom command"
+- Want to "define command arguments"
+- Ask about "command frontmatter" or YAML configuration
+- Need to "organize commands" or use namespacing
+- Want to create commands with file references
+- Ask about "bash execution in commands"
+- Need command development best practices
+
+## Progressive Disclosure
+
+The skill uses progressive disclosure:
+
+1. **SKILL.md** (~2,470 words): Core concepts, common patterns, and plugin features overview
+2. **References** (~13,500 words total): Detailed specifications
+   - frontmatter-reference.md (~1,200 words)
+   - plugin-features-reference.md (~1,800 words)
+   - interactive-commands.md (~2,500 words)
+   - advanced-workflows.md (~1,700 words)
+   - testing-strategies.md (~2,200 words)
+   - documentation-patterns.md (~2,000 words)
+   - marketplace-considerations.md (~2,200 words)
+3. **Examples** (~6,000 words total): Complete working command examples
+   - simple-commands.md
+   - plugin-commands.md
+
+Claude loads references and examples as needed based on task.
+
+## Command Basics Quick Reference
+
+### File Format
+
+```markdown
+---
+description: Brief description
+argument-hint: [arg1] [arg2]
+allowed-tools: Read, Bash(git:*)
+---
+
+Command prompt content with:
+- Arguments: $1, $2, or $ARGUMENTS
+- Files: @path/to/file
+- Bash: !`command here`
+```
+
+### Locations
+
+- **Project**: `.claude/commands/` (shared with team)
+- **Personal**: `~/.claude/commands/` (your commands)
+- **Plugin**: `plugin-name/commands/` (plugin-specific)
+
+### Key Features
+
+**Dynamic arguments:**
+- `$ARGUMENTS` - All arguments as single string
+- `$1`, `$2`, `$3` - Positional arguments
+
+**File references:**
+- `@path/to/file` - Include file contents
+
+**Bash execution:**
+- `!`command`` - Execute and include output
+
+## Frontmatter Fields Quick Reference
+
+| Field | Purpose | Example |
+|-------|---------|---------|
+| `description` | Brief description for /help | `"Review code for issues"` |
+| `allowed-tools` | Restrict tool access | `Read, Bash(git:*)` |
+| `model` | Specify model | `sonnet`, `opus`, `haiku` |
+| `argument-hint` | Document arguments | `[pr-number] [priority]` |
+| `disable-model-invocation` | Manual-only command | `true` |
+
+## Common Patterns
+
+### Simple Review Command
+
+```markdown
+---
+description: Review code for issues
+---
+
+Review this code for quality and potential bugs.
+```
+
+### Command with Arguments
+
+```markdown
+---
+description: Deploy to environment
+argument-hint: [environment] [version]
+---
+
+Deploy to $1 environment using version $2
+```
+
+### Command with File Reference
+
+```markdown
+---
+description: Document file
+argument-hint: [file-path]
+---
+
+Generate documentation for @$1
+```
+
+### Command with Bash Execution
+
+```markdown
+---
+description: Show Git status
+allowed-tools: Bash(git:*)
+---
+
+Current status: !`git status`
+Recent commits: !`git log --oneline -5`
+```
+
+## Development Workflow
+
+1. **Design command:**
+   - Define purpose and scope
+   - Determine required arguments
+   - Identify needed tools
+
+2. **Create file:**
+   - Choose appropriate location
+   - Create `.md` file with command name
+   - Write basic prompt
+
+3. **Add frontmatter:**
+   - Start minimal (just description)
+   - Add fields as needed (allowed-tools, etc.)
+   - Document arguments with argument-hint
+
+4. **Test command:**
+   - Invoke with `/command-name`
+   - Verify arguments work
+   - Check bash execution
+   - Test file references
+
+5. **Refine:**
+   - Improve prompt clarity
+   - Handle edge cases
+   - Add examples in comments
+   - Document requirements
+
+## Best Practices Summary
+
+1. **Single responsibility**: One command, one clear purpose
+2. **Clear descriptions**: Make discoverable in `/help`
+3. **Document arguments**: Always use argument-hint
+4. **Minimal tools**: Use most restrictive allowed-tools
+5. **Test thoroughly**: Verify all features work
+6. **Add comments**: Explain complex logic
+7. **Handle errors**: Consider missing arguments/files
+
+## Status
+
+**Completed enhancements:**
+- ✓ Plugin command patterns (${CLAUDE_PLUGIN_ROOT}, discovery, organization)
+- ✓ Integration patterns (agents, skills, hooks coordination)
+- ✓ Validation patterns (input, file, resource validation, error handling)
+
+**Remaining enhancements (in progress):**
+- Advanced workflows (multi-step command sequences)
+- Testing strategies (how to test commands effectively)
+- Documentation patterns (command documentation best practices)
+- Marketplace considerations (publishing and distribution)
+
+## Maintenance
+
+To update this skill:
+1. Keep SKILL.md focused on core fundamentals
+2. Move detailed specifications to references/
+3. Add new examples/ for different use cases
+4. Update frontmatter when new fields added
+5. Ensure imperative/infinitive form throughout
+6. Test examples work with current Claude Code
+
+## Version History
+
+**v0.1.0** (2025-01-15):
+- Initial release with basic command fundamentals
+- Frontmatter field reference
+- 10 simple command examples
+- Ready for plugin-specific pattern additions