creating intital scaffolding for claude code plugins

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+# Plugin Development Toolkit
+
+A comprehensive toolkit for developing Claude Code plugins with expert guidance on hooks, MCP integration, plugin structure, and marketplace publishing.
+
+## Overview
+
+The plugin-dev toolkit provides seven specialized skills to help you build high-quality Claude Code plugins:
+
+1. **Hook Development** - Advanced hooks API and event-driven automation
+2. **MCP Integration** - Model Context Protocol server integration
+3. **Plugin Structure** - Plugin organization and manifest configuration
+4. **Plugin Settings** - Configuration patterns using .claude/plugin-name.local.md files
+5. **Command Development** - Creating slash commands with frontmatter and arguments
+6. **Agent Development** - Creating autonomous agents with AI-assisted generation
+7. **Skill Development** - Creating skills with progressive disclosure and strong triggers
+
+Each skill follows best practices with progressive disclosure: lean core documentation, detailed references, working examples, and utility scripts.
+
+## Guided Workflow Command
+
+### /plugin-dev:create-plugin
+
+A comprehensive, end-to-end workflow command for creating plugins from scratch, similar to the feature-dev workflow.
+
+**8-Phase Process:**
+1. **Discovery** - Understand plugin purpose and requirements
+2. **Component Planning** - Determine needed skills, commands, agents, hooks, MCP
+3. **Detailed Design** - Specify each component and resolve ambiguities
+4. **Structure Creation** - Set up directories and manifest
+5. **Component Implementation** - Create each component using AI-assisted agents
+6. **Validation** - Run plugin-validator and component-specific checks
+7. **Testing** - Verify plugin works in Claude Code
+8. **Documentation** - Finalize README and prepare for distribution
+
+**Features:**
+- Asks clarifying questions at each phase
+- Loads relevant skills automatically
+- Uses agent-creator for AI-assisted agent generation
+- Runs validation utilities (validate-agent.sh, validate-hook-schema.sh, etc.)
+- Follows plugin-dev's own proven patterns
+- Guides through testing and verification
+
+**Usage:**
+```bash
+/plugin-dev:create-plugin [optional description]
+
+# Examples:
+/plugin-dev:create-plugin
+/plugin-dev:create-plugin A plugin for managing database migrations
+```
+
+Use this workflow for structured, high-quality plugin development from concept to completion.
+
+## Skills
+
+### 1. Hook Development
+
+**Trigger phrases:** "create a hook", "add a PreToolUse hook", "validate tool use", "implement prompt-based hooks", "${CLAUDE_PLUGIN_ROOT}", "block dangerous commands"
+
+**What it covers:**
+- Prompt-based hooks (recommended) with LLM decision-making
+- Command hooks for deterministic validation
+- All hook events: PreToolUse, PostToolUse, Stop, SubagentStop, SessionStart, SessionEnd, UserPromptSubmit, PreCompact, Notification
+- Hook output formats and JSON schemas
+- Security best practices and input validation
+- ${CLAUDE_PLUGIN_ROOT} for portable paths
+
+**Resources:**
+- Core SKILL.md (1,619 words)
+- 3 example hook scripts (validate-write, validate-bash, load-context)
+- 3 reference docs: patterns, migration, advanced techniques
+- 3 utility scripts: validate-hook-schema.sh, test-hook.sh, hook-linter.sh
+
+**Use when:** Creating event-driven automation, validating operations, or enforcing policies in your plugin.
+
+### 2. MCP Integration
+
+**Trigger phrases:** "add MCP server", "integrate MCP", "configure .mcp.json", "Model Context Protocol", "stdio/SSE/HTTP server", "connect external service"
+
+**What it covers:**
+- MCP server configuration (.mcp.json vs plugin.json)
+- All server types: stdio (local), SSE (hosted/OAuth), HTTP (REST), WebSocket (real-time)
+- Environment variable expansion (${CLAUDE_PLUGIN_ROOT}, user vars)
+- MCP tool naming and usage in commands/agents
+- Authentication patterns: OAuth, tokens, env vars
+- Integration patterns and performance optimization
+
+**Resources:**
+- Core SKILL.md (1,666 words)
+- 3 example configurations (stdio, SSE, HTTP)
+- 3 reference docs: server-types (~3,200w), authentication (~2,800w), tool-usage (~2,600w)
+
+**Use when:** Integrating external services, APIs, databases, or tools into your plugin.
+
+### 3. Plugin Structure
+
+**Trigger phrases:** "plugin structure", "plugin.json manifest", "auto-discovery", "component organization", "plugin directory layout"
+
+**What it covers:**
+- Standard plugin directory structure and auto-discovery
+- plugin.json manifest format and all fields
+- Component organization (commands, agents, skills, hooks)
+- ${CLAUDE_PLUGIN_ROOT} usage throughout
+- File naming conventions and best practices
+- Minimal, standard, and advanced plugin patterns
+
+**Resources:**
+- Core SKILL.md (1,619 words)
+- 3 example structures (minimal, standard, advanced)
+- 2 reference docs: component-patterns, manifest-reference
+
+**Use when:** Starting a new plugin, organizing components, or configuring the plugin manifest.
+
+### 4. Plugin Settings
+
+**Trigger phrases:** "plugin settings", "store plugin configuration", ".local.md files", "plugin state files", "read YAML frontmatter", "per-project plugin settings"
+
+**What it covers:**
+- .claude/plugin-name.local.md pattern for configuration
+- YAML frontmatter + markdown body structure
+- Parsing techniques for bash scripts (sed, awk, grep patterns)
+- Temporarily active hooks (flag files and quick-exit)
+- Real-world examples from multi-agent-swarm and ralph-wiggum plugins
+- Atomic file updates and validation
+- Gitignore and lifecycle management
+
+**Resources:**
+- Core SKILL.md (1,623 words)
+- 3 examples (read-settings hook, create-settings command, templates)
+- 2 reference docs: parsing-techniques, real-world-examples
+- 2 utility scripts: validate-settings.sh, parse-frontmatter.sh
+
+**Use when:** Making plugins configurable, storing per-project state, or implementing user preferences.
+
+### 5. Command Development
+
+**Trigger phrases:** "create a slash command", "add a command", "command frontmatter", "define command arguments", "organize commands"
+
+**What it covers:**
+- Slash command structure and markdown format
+- YAML frontmatter fields (description, argument-hint, allowed-tools)
+- Dynamic arguments and file references
+- Bash execution for context
+- Command organization and namespacing
+- Best practices for command development
+
+**Resources:**
+- Core SKILL.md (1,535 words)
+- Examples and reference documentation
+- Command organization patterns
+
+**Use when:** Creating slash commands, defining command arguments, or organizing plugin commands.
+
+### 6. Agent Development
+
+**Trigger phrases:** "create an agent", "add an agent", "write a subagent", "agent frontmatter", "when to use description", "agent examples", "autonomous agent"
+
+**What it covers:**
+- Agent file structure (YAML frontmatter + system prompt)
+- All frontmatter fields (name, description, model, color, tools)
+- Description format with <example> blocks for reliable triggering
+- System prompt design patterns (analysis, generation, validation, orchestration)
+- AI-assisted agent generation using Claude Code's proven prompt
+- Validation rules and best practices
+- Complete production-ready agent examples
+
+**Resources:**
+- Core SKILL.md (1,438 words)
+- 2 examples: agent-creation-prompt (AI-assisted workflow), complete-agent-examples (4 full agents)
+- 3 reference docs: agent-creation-system-prompt (from Claude Code), system-prompt-design (~4,000w), triggering-examples (~2,500w)
+- 1 utility script: validate-agent.sh
+
+**Use when:** Creating autonomous agents, defining agent behavior, or implementing AI-assisted agent generation.
+
+### 7. Skill Development
+
+**Trigger phrases:** "create a skill", "add a skill to plugin", "write a new skill", "improve skill description", "organize skill content"
+
+**What it covers:**
+- Skill structure (SKILL.md with YAML frontmatter)
+- Progressive disclosure principle (metadata → SKILL.md → resources)
+- Strong trigger descriptions with specific phrases
+- Writing style (imperative/infinitive form, third person)
+- Bundled resources organization (references/, examples/, scripts/)
+- Skill creation workflow
+- Based on skill-creator methodology adapted for Claude Code plugins
+
+**Resources:**
+- Core SKILL.md (1,232 words)
+- References: skill-creator methodology, plugin-dev patterns
+- Examples: Study plugin-dev's own skills as templates
+
+**Use when:** Creating new skills for plugins or improving existing skill quality.
+
+
+## Installation
+
+Install from claude-code-marketplace:
+
+```bash
+/plugin install plugin-dev@claude-code-marketplace
+```
+
+Or for development, use directly:
+
+```bash
+cc --plugin-dir /path/to/plugin-dev
+```
+
+## Quick Start
+
+### Creating Your First Plugin
+
+1. **Plan your plugin structure:**
+   - Ask: "What's the best directory structure for a plugin with commands and MCP integration?"
+   - The plugin-structure skill will guide you
+
+2. **Add MCP integration (if needed):**
+   - Ask: "How do I add an MCP server for database access?"
+   - The mcp-integration skill provides examples and patterns
+
+3. **Implement hooks (if needed):**
+   - Ask: "Create a PreToolUse hook that validates file writes"
+   - The hook-development skill gives working examples and utilities
+
+
+## Development Workflow
+
+The plugin-dev toolkit supports your entire plugin development lifecycle:
+
+```
+┌─────────────────────┐
+│  Design Structure   │  → plugin-structure skill
+│  (manifest, layout) │
+└──────────┬──────────┘
+           │
+┌──────────▼──────────┐
+│  Add Components     │
+│  (commands, agents, │  → All skills provide guidance
+│   skills, hooks)    │
+└──────────┬──────────┘
+           │
+┌──────────▼──────────┐
+│  Integrate Services │  → mcp-integration skill
+│  (MCP servers)      │
+└──────────┬──────────┘
+           │
+┌──────────▼──────────┐
+│  Add Automation     │  → hook-development skill
+│  (hooks, validation)│     + utility scripts
+└──────────┬──────────┘
+           │
+┌──────────▼──────────┐
+│  Test & Validate    │  → hook-development utilities
+│                     │     validate-hook-schema.sh
+└──────────┬──────────┘     test-hook.sh
+           │                 hook-linter.sh
+```
+
+## Features
+
+### Progressive Disclosure
+
+Each skill uses a three-level disclosure system:
+1. **Metadata** (always loaded): Concise descriptions with strong triggers
+2. **Core SKILL.md** (when triggered): Essential API reference (~1,500-2,000 words)
+3. **References/Examples** (as needed): Detailed guides, patterns, and working code
+
+This keeps Claude Code's context focused while providing deep knowledge when needed.
+
+### Utility Scripts
+
+The hook-development skill includes production-ready utilities:
+
+```bash
+# Validate hooks.json structure
+./validate-hook-schema.sh hooks/hooks.json
+
+# Test hooks before deployment
+./test-hook.sh my-hook.sh test-input.json
+
+# Lint hook scripts for best practices
+./hook-linter.sh my-hook.sh
+```
+
+### Working Examples
+
+Every skill provides working examples:
+- **Hook Development**: 3 complete hook scripts (bash, write validation, context loading)
+- **MCP Integration**: 3 server configurations (stdio, SSE, HTTP)
+- **Plugin Structure**: 3 plugin layouts (minimal, standard, advanced)
+- **Plugin Settings**: 3 examples (read-settings hook, create-settings command, templates)
+- **Command Development**: 10 complete command examples (review, test, deploy, docs, etc.)
+
+## Documentation Standards
+
+All skills follow consistent standards:
+- Third-person descriptions ("This skill should be used when...")
+- Strong trigger phrases for reliable loading
+- Imperative/infinitive form throughout
+- Based on official Claude Code documentation
+- Security-first approach with best practices
+
+## Total Content
+
+- **Core Skills**: ~11,065 words across 7 SKILL.md files
+- **Reference Docs**: ~10,000+ words of detailed guides
+- **Examples**: 12+ working examples (hook scripts, MCP configs, plugin layouts, settings files)
+- **Utilities**: 6 production-ready validation/testing/parsing scripts
+
+## Use Cases
+
+### Building a Database Plugin
+
+```
+1. "What's the structure for a plugin with MCP integration?"
+   → plugin-structure skill provides layout
+
+2. "How do I configure an stdio MCP server for PostgreSQL?"
+   → mcp-integration skill shows configuration
+
+3. "Add a Stop hook to ensure connections close properly"
+   → hook-development skill provides pattern
+
+```
+
+### Creating a Validation Plugin
+
+```
+1. "Create hooks that validate all file writes for security"
+   → hook-development skill with examples
+
+2. "Test my hooks before deploying"
+   → Use validate-hook-schema.sh and test-hook.sh
+
+3. "Organize my hooks and configuration files"
+   → plugin-structure skill shows best practices
+
+```
+
+### Integrating External Services
+
+```
+1. "Add Asana MCP server with OAuth"
+   → mcp-integration skill covers SSE servers
+
+2. "Use Asana tools in my commands"
+   → mcp-integration tool-usage reference
+
+3. "Structure my plugin with commands and MCP"
+   → plugin-structure skill provides patterns
+```
+
+## Best Practices
+
+All skills emphasize:
+
+✅ **Security First**
+- Input validation in hooks
+- HTTPS/WSS for MCP servers
+- Environment variables for credentials
+- Principle of least privilege
+
+✅ **Portability**
+- Use ${CLAUDE_PLUGIN_ROOT} everywhere
+- Relative paths only
+- Environment variable substitution
+
+✅ **Testing**
+- Validate configurations before deployment
+- Test hooks with sample inputs
+- Use debug mode (`claude --debug`)
+
+✅ **Documentation**
+- Clear README files
+- Documented environment variables
+- Usage examples
+
+## Contributing
+
+This plugin is part of the claude-code-marketplace. To contribute improvements:
+
+1. Fork the marketplace repository
+2. Make changes to plugin-dev/
+3. Test locally with `cc --plugin-dir`
+4. Create PR following marketplace-publishing guidelines
+
+## Version
+
+0.1.0 - Initial release with seven comprehensive skills and three validation agents
+
+## Author
+
+Daisy Hollman (daisy@anthropic.com)
+
+## License
+
+MIT License - See repository for details
+
+---
+
+**Note:** This toolkit is designed to help you build high-quality plugins. The skills load automatically when you ask relevant questions, providing expert guidance exactly when you need it.