commit 9e41b7cc0dd0e145035360bad359e78500f2a68a
Author: Zhongwei Li <lizhongwei.nkcs@gmail.com>
Date:   Sun Nov 30 08:28:20 2025 +0800

    Initial commit

diff --git a/.claude-plugin/plugin.json b/.claude-plugin/plugin.json
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+++ b/.claude-plugin/plugin.json
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+{
+  "name": "plugin-builder",
+  "description": "Helps create well-structured Claude Code plugins with skills, commands, and proper metadata following best practices",
+  "version": "1.0.0",
+  "author": {
+    "name": "Claude Code Marketplace"
+  },
+  "skills": [
+    "./skills"
+  ]
+}
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diff --git a/README.md b/README.md
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+# plugin-builder
+
+Helps create well-structured Claude Code plugins with skills, commands, and proper metadata following best practices
diff --git a/plugin.lock.json b/plugin.lock.json
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index 0000000..cb232ac
--- /dev/null
+++ b/plugin.lock.json
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+{
+  "$schema": "internal://schemas/plugin.lock.v1.json",
+  "pluginId": "gh:joel611/claude-plugins:plugins/claude/plugin-builder",
+  "normalized": {
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+    "ref": "refs/tags/v20251128.0",
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+    "treeHash": "6db020c2be0e8fef2246353f4db6e1e439bf187e203861b4f95f5617aa6c5310",
+    "generatedAt": "2025-11-28T10:19:17.220216Z",
+    "toolVersion": "publish_plugins.py@0.2.0"
+  },
+  "origin": {
+    "remote": "git@github.com:zhongweili/42plugin-data.git",
+    "branch": "master",
+    "commit": "aa1497ed0949fd50e99e70d6324a29c5b34f9390",
+    "repoRoot": "/Users/zhongweili/projects/openmind/42plugin-data"
+  },
+  "manifest": {
+    "name": "plugin-builder",
+    "description": "Helps create well-structured Claude Code plugins with skills, commands, and proper metadata following best practices",
+    "version": "1.0.0"
+  },
+  "content": {
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+      {
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+        "sha256": "685b32ad42afff51ed583a1fc2e0ad2faaee4b0d7ec869975e732bd4d207276d"
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+    "scannerVersion": null,
+    "flags": []
+  }
+}
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diff --git a/skills/plugin-builder/SKILL.md b/skills/plugin-builder/SKILL.md
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+# Plugin Builder Skill
+
+## Purpose
+
+This skill guides you through creating well-structured Claude Code plugins with all necessary components, following best practices for discoverability, maintainability, and user experience.
+
+## When to Use
+
+Use this skill when:
+- Creating a new Claude Code plugin from scratch
+- Adding components (skills, commands, agents, hooks) to existing plugins
+- Generating properly structured SKILL.md files
+- Setting up marketplace plugin registration
+- Validating plugin metadata and structure
+
+## Prerequisites
+
+- Access to a Claude Code marketplace repository
+- Understanding of the plugin's intended functionality
+- Basic knowledge of JSON and Markdown formats
+- Location of the marketplace root directory
+
+## Plugin Architecture Overview
+
+A Claude Code plugin follows this structure:
+
+```
+plugin-name/
+├── .claude-plugin/
+│   └── plugin.json       # Required: Plugin metadata
+├── skills/               # Optional: Agent Skills
+│   └── skill-name/
+│       ├── SKILL.md      # Skill instructions
+│       ├── scripts/      # Optional: Executable code
+│       └── resources/    # Optional: Templates, data
+├── commands/             # Optional: Custom slash commands
+│   └── command-name.md
+├── agents/               # Optional: Custom agent definitions
+├── hooks/                # Optional: Event handlers
+│   └── hooks.json
+└── .mcp.json            # Optional: MCP server configuration
+```
+
+## Instructions
+
+### Step 1: Plan the Plugin
+
+Before creating files, clarify:
+1. **Plugin name** (use kebab-case: `my-plugin-name`)
+2. **Purpose** (what problem does it solve?)
+3. **Components needed** (skills, commands, agents, hooks?)
+4. **Target users** (who will use this plugin?)
+
+### Step 2: Create Plugin Directory Structure
+
+1. Navigate to the marketplace `plugins/` directory
+2. Create the plugin directory: `plugins/category/plugin-name/`
+3. Create required subdirectories:
+   ```bash
+   mkdir -p plugins/category/plugin-name/.claude-plugin
+   mkdir -p plugins/category/plugin-name/skills
+   mkdir -p plugins/category/plugin-name/commands  # if needed
+   ```
+
+### Step 3: Generate plugin.json
+
+Create `.claude-plugin/plugin.json` with this structure:
+
+```json
+{
+  "name": "plugin-name",
+  "description": "Clear, concise description of plugin functionality (1-2 sentences)",
+  "version": "1.0.0",
+  "author": {
+    "name": "Author Name",
+    "email": "author@example.com"
+  }
+}
+```
+
+**Required fields:**
+- `name`: Plugin identifier (kebab-case, no spaces)
+- `description`: User-facing description (be specific about what it does)
+- `version`: Semantic version (major.minor.patch)
+- `author.name`: Author's name
+
+**Version Guidelines:**
+- Start with `1.0.0` for initial release
+- Increment patch (1.0.1) for bug fixes
+- Increment minor (1.1.0) for new features (backward compatible)
+- Increment major (2.0.0) for breaking changes
+
+### Step 4: Create Skills (if applicable)
+
+For each skill in the plugin:
+
+1. **Create skill directory:**
+   ```bash
+   mkdir -p plugins/category/plugin-name/skills/skill-name
+   ```
+
+2. **Create SKILL.md** using progressive disclosure format:
+
+```markdown
+# Skill Name
+
+## Purpose
+[1-2 sentences: What this skill does and its main value]
+
+## When to Use
+[Bullet list of specific scenarios where this skill applies]
+- Creating X
+- Automating Y
+- Solving Z problem
+
+## Prerequisites
+[What's needed before using this skill]
+- Required tools or libraries
+- Necessary permissions or access
+- Context or information needed
+
+## Instructions
+
+### Task 1: [First Major Step]
+[Detailed step-by-step instructions]
+1. Do this first
+2. Then do this
+3. Finally do this
+
+### Task 2: [Second Major Step]
+[More detailed instructions]
+
+[Continue with all major tasks...]
+
+## Examples
+
+### Example 1: [Concrete Use Case]
+[Show complete example with actual code/commands]
+
+\`\`\`language
+[actual code]
+\`\`\`
+
+### Example 2: [Another Use Case]
+[Another complete example]
+
+## Best Practices
+- [Specific practice 1]
+- [Specific practice 2]
+- [Specific practice 3]
+
+## Common Issues
+- **Problem:** [Description]
+  **Solution:** [How to fix]
+- **Problem:** [Description]
+  **Solution:** [How to fix]
+```
+
+3. **Add optional resources:**
+   ```bash
+   mkdir -p plugins/category/plugin-name/skills/skill-name/resources
+   mkdir -p plugins/category/plugin-name/skills/skill-name/scripts
+   ```
+
+**Skill Best Practices:**
+- **Focus:** Each skill should do ONE thing well
+- **Discoverability:** Use clear, searchable names and descriptions
+- **Progressive disclosure:** Start with overview, then details, then examples
+- **Actionable:** Provide concrete steps, not generic advice
+- **Examples:** Include real, working examples users can adapt
+- **Error handling:** Document common issues and solutions
+
+### Step 5: Create Commands (if applicable)
+
+For custom slash commands:
+
+1. **Create command file:**
+   ```bash
+   touch plugins/category/plugin-name/commands/command-name.md
+   ```
+
+2. **Write command markdown:**
+
+```markdown
+# Command Name
+
+[Description of what this command does]
+
+## Usage
+/command-name [arguments]
+
+## Examples
+/command-name example-arg
+
+## Parameters
+- `arg1`: Description of first argument
+- `arg2`: Description of second argument (optional)
+
+## Instructions for Claude
+[Detailed instructions for what Claude should do when this command is invoked]
+
+1. Step 1
+2. Step 2
+3. Step 3
+```
+
+### Step 6: Update Marketplace Registry
+
+1. **Open marketplace.json:**
+   Located at `.claude-plugin/marketplace.json` in the repository root
+
+2. **Add plugin entry:**
+   ```json
+   {
+     "name": "marketplace-name",
+     "plugins": [
+       {
+         "name": "plugin-name",
+         "source": "./plugins/category/plugin-name",
+         "description": "Plugin description"
+       }
+     ]
+   }
+   ```
+
+   **Important:** For local plugins, the `source` field must start with `./` to specify a relative path from the marketplace root.
+
+### Step 7: Validate Plugin
+
+**Checklist:**
+- [ ] plugin.json exists and has all required fields
+- [ ] Plugin name uses kebab-case (no spaces, lowercase with hyphens)
+- [ ] Description is clear and specific
+- [ ] Version follows semantic versioning (major.minor.patch)
+- [ ] All SKILL.md files follow progressive disclosure format
+- [ ] Examples are included in all SKILL.md files
+- [ ] Commands have clear usage instructions
+- [ ] Plugin is registered in marketplace.json
+- [ ] File paths are correct and accessible
+
+### Step 8: Test Locally
+
+1. **Install the plugin locally:**
+   - User runs: `/plugin install plugin-name@marketplace-name`
+
+2. **Test skill invocation:**
+   - Verify skills are discoverable
+   - Test with relevant prompts
+   - Check that instructions are clear
+
+3. **Test commands:**
+   - Run each slash command
+   - Verify behavior matches documentation
+
+4. **Iterate:**
+   - Fix any issues found
+   - Update documentation as needed
+   - Increment version number for changes
+
+## Complete Examples
+
+### Example 1: Creating a Data Validation Plugin
+
+**Scenario:** Create a plugin that validates JSON schemas
+
+**Step-by-step:**
+
+1. **Create structure:**
+   ```bash
+   mkdir -p plugins/data/json-validator/.claude-plugin
+   mkdir -p plugins/data/json-validator/skills/json-validator
+   ```
+
+2. **Create plugin.json:**
+   ```json
+   {
+     "name": "json-validator",
+     "description": "Validates JSON data against schemas with detailed error reporting",
+     "version": "1.0.0",
+     "author": {
+       "name": "Data Team"
+     }
+   }
+   ```
+
+3. **Create SKILL.md:**
+   ```markdown
+   # JSON Validator Skill
+
+   ## Purpose
+   Validates JSON data against JSON Schema specifications and provides detailed error reports.
+
+   ## When to Use
+   - Validating API request/response payloads
+   - Checking configuration files
+   - Ensuring data structure compliance
+
+   ## Prerequisites
+   - JSON data to validate
+   - JSON Schema definition
+   - Understanding of JSON Schema syntax
+
+   ## Instructions
+
+   ### Validate JSON Data
+   1. Receive or locate the JSON data to validate
+   2. Receive or locate the JSON Schema
+   3. Parse both JSON data and schema
+   4. Validate data against schema
+   5. Report validation results with specific errors
+   6. Suggest fixes for validation errors
+
+   ## Examples
+
+   ### Example 1: Validate User Object
+   Schema:
+   \`\`\`json
+   {
+     "type": "object",
+     "properties": {
+       "name": {"type": "string"},
+       "age": {"type": "number"}
+     },
+     "required": ["name"]
+   }
+   \`\`\`
+
+   Valid data:
+   \`\`\`json
+   {"name": "Alice", "age": 30}
+   \`\`\`
+
+   Invalid data:
+   \`\`\`json
+   {"age": 30}
+   \`\`\`
+   Error: Missing required property 'name'
+
+   ## Best Practices
+   - Always show the full error path for nested objects
+   - Suggest corrected JSON when possible
+   - Validate schema itself before using it
+   - Handle common schema mistakes gracefully
+
+   ## Common Issues
+   - **Problem:** Schema reference ($ref) not resolved
+     **Solution:** Ensure all referenced schemas are accessible
+   - **Problem:** Type coercion confusion
+     **Solution:** Be explicit about type expectations
+   ```
+
+4. **Update marketplace.json:**
+   ```json
+   {
+     "plugins": [
+       {
+         "name": "json-validator",
+         "source": "./plugins/data/json-validator",
+         "description": "Validates JSON data against schemas"
+       }
+     ]
+   }
+   ```
+
+### Example 2: Adding a Skill to Existing Plugin
+
+**Scenario:** Add a new skill to the json-validator plugin
+
+1. **Create new skill directory:**
+   ```bash
+   mkdir -p plugins/data/json-validator/skills/schema-generator
+   ```
+
+2. **Create SKILL.md:**
+   ```markdown
+   # Schema Generator Skill
+
+   ## Purpose
+   Generates JSON Schema definitions from example JSON data.
+
+   ## When to Use
+   - Creating schemas from existing data
+   - Documenting API data structures
+   - Reverse engineering schemas
+
+   [... rest of SKILL.md ...]
+   ```
+
+3. **Update plugin version:**
+   Edit `plugin.json`:
+   ```json
+   {
+     "version": "1.1.0"
+   }
+   ```
+   (Minor version increment for new feature)
+
+## Naming Conventions
+
+**Plugins:**
+- Use kebab-case: `my-plugin-name`
+- Be descriptive but concise
+- Avoid generic names like "helper" or "utility"
+- Good: `json-validator`, `code-formatter`, `api-tester`
+- Bad: `helper`, `utils`, `my_plugin`
+
+**Skills:**
+- Use clear, action-oriented names
+- Match the skill's primary function
+- Good: `json-validator`, `schema-generator`, `data-transformer`
+- Bad: `skill1`, `helper`, `misc`
+
+**Commands:**
+- Start with verb when possible
+- Be specific about action
+- Good: `validate-json`, `generate-schema`, `format-code`
+- Bad: `do-thing`, `run`, `help`
+
+## Best Practices Summary
+
+### Plugin Design
+- **Single responsibility:** Each plugin should have a clear, focused purpose
+- **Composability:** Plugins should work well together
+- **Discoverability:** Names and descriptions should make purpose obvious
+- **Documentation:** Include examples for all features
+- **Versioning:** Follow semantic versioning strictly
+
+### Skill Design
+- **Progressive disclosure:** Overview → Instructions → Examples
+- **Concrete examples:** Show real code, not pseudocode
+- **Error handling:** Document common issues and solutions
+- **Prerequisites:** List what's needed upfront
+- **Modularity:** Keep skills focused on specific tasks
+
+### Testing
+- **Local testing:** Always test before committing
+- **User perspective:** Test as if you've never seen it before
+- **Documentation:** Verify all examples work
+- **Edge cases:** Test with unusual inputs
+- **Integration:** Test with other plugins
+
+### Maintenance
+- **Version bump:** Update version for any changes
+- **Changelog:** Document what changed and why
+- **Backward compatibility:** Don't break existing users
+- **Deprecation:** Warn before removing features
+- **Updates:** Keep dependencies and references current
+
+## Common Issues and Solutions
+
+### Issue 1: Skill Not Being Discovered
+**Problem:** Claude doesn't load the skill when relevant
+
+**Solutions:**
+- Check SKILL.md filename is exactly `SKILL.md` (case-sensitive)
+- Verify skill directory path: `plugins/category/plugin/skills/skill-name/SKILL.md`
+- Ensure plugin is registered in marketplace.json
+- Check that skill name and description are descriptive
+- Verify plugin is installed: `/plugin list`
+
+### Issue 2: Invalid Plugin Metadata
+**Problem:** Plugin fails to install or load
+
+**Solutions:**
+- Validate JSON syntax in plugin.json (no trailing commas, proper quotes)
+- Ensure all required fields present: name, description, version, author.name
+- Check name uses kebab-case with no spaces
+- Verify version follows semantic versioning (X.Y.Z)
+- Ensure file is named exactly `plugin.json`
+
+### Issue 3: Command Not Working
+**Problem:** Slash command doesn't execute
+
+**Solutions:**
+- Verify command file is in `commands/` directory
+- Check filename matches command name
+- Ensure markdown formatting is correct
+- Verify plugin is installed and loaded
+- Check command syntax matches documentation
+
+### Issue 4: Marketplace Registration Failed
+**Problem:** Plugin not showing in marketplace
+
+**Solutions:**
+- Verify marketplace.json syntax is valid
+- Check plugin source path is correct relative to marketplace root
+- Ensure plugin name in marketplace.json matches plugin.json
+- Verify marketplace.json is in `.claude-plugin/` at repo root
+
+### Issue 5: Version Conflicts
+**Problem:** Multiple versions causing issues
+
+**Solutions:**
+- Use semantic versioning consistently
+- Document breaking changes clearly
+- Test compatibility with existing plugins
+- Update marketplace.json with correct version
+- Consider version deprecation strategy
+
+## Resources
+
+The plugin-builder includes templates in `skills/plugin-builder/resources/`:
+- `plugin-template.json`: Starter plugin.json
+- `skill-template.md`: SKILL.md boilerplate
+- `command-template.md`: Command file structure
+- `marketplace-entry.json`: Marketplace registration example
+
+## Support
+
+For plugin system documentation, see:
+- Claude Code Plugins: https://docs.claude.com/en/docs/claude-code/plugins
+- Agent Skills: https://docs.claude.com/en/docs/claude-code/skills
+- Skills Best Practices: https://docs.anthropic.com/en/docs/agents-and-tools/agent-skills/best-practices
diff --git a/skills/plugin-builder/resources/command-template.md b/skills/plugin-builder/resources/command-template.md
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+# Command Name
+
+[Brief description of what this command does - 1-2 sentences]
+
+## Usage
+
+```
+/command-name [required-arg] [optional-arg]
+```
+
+## Parameters
+
+- `required-arg`: Description of the required argument and what it should be
+- `optional-arg`: Description of optional argument (if any)
+
+## Examples
+
+### Example 1: Basic Usage
+```
+/command-name example-value
+```
+[Description of what happens]
+
+### Example 2: Advanced Usage
+```
+/command-name example-value optional-value
+```
+[Description of what happens with optional argument]
+
+## Instructions for Claude
+
+When this command is invoked, you should:
+
+1. [First action to take]
+2. [Second action]
+3. [Third action]
+4. [Final action]
+
+### Validation
+
+Before executing:
+- [Check this condition]
+- [Verify that requirement]
+
+### Error Handling
+
+If [error condition]:
+- [How to handle it]
+
+If [another error]:
+- [Resolution steps]
+
+## Notes
+
+- [Important note about usage]
+- [Limitation or constraint]
+- [Related commands or skills]
diff --git a/skills/plugin-builder/resources/marketplace-entry.json b/skills/plugin-builder/resources/marketplace-entry.json
new file mode 100644
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--- /dev/null
+++ b/skills/plugin-builder/resources/marketplace-entry.json
@@ -0,0 +1,5 @@
+{
+  "name": "plugin-name",
+  "source": "./plugins/category/plugin-name",
+  "description": "Brief description of what the plugin does for marketplace listing"
+}
diff --git a/skills/plugin-builder/resources/plugin-template.json b/skills/plugin-builder/resources/plugin-template.json
new file mode 100644
index 0000000..bf7ec89
--- /dev/null
+++ b/skills/plugin-builder/resources/plugin-template.json
@@ -0,0 +1,9 @@
+{
+  "name": "plugin-name",
+  "description": "Clear, concise description of plugin functionality (1-2 sentences)",
+  "version": "1.0.0",
+  "author": {
+    "name": "Author Name",
+    "email": "author@example.com"
+  }
+}
diff --git a/skills/plugin-builder/resources/skill-template.md b/skills/plugin-builder/resources/skill-template.md
new file mode 100644
index 0000000..d62fbf6
--- /dev/null
+++ b/skills/plugin-builder/resources/skill-template.md
@@ -0,0 +1,86 @@
+# Skill Name
+
+## Purpose
+
+[1-2 sentences describing what this skill does and its main value proposition]
+
+## When to Use
+
+Use this skill when:
+- [Specific scenario 1]
+- [Specific scenario 2]
+- [Specific scenario 3]
+
+## Prerequisites
+
+- [Required tool, library, or dependency]
+- [Necessary permission or access]
+- [Context or information needed]
+
+## Instructions
+
+### Step 1: [First Major Task]
+
+[Detailed step-by-step instructions for the first major task]
+
+1. [Specific action]
+2. [Next action]
+3. [Final action]
+
+### Step 2: [Second Major Task]
+
+[Detailed instructions for the second task]
+
+1. [Action]
+2. [Action]
+
+[Continue with additional steps as needed...]
+
+## Examples
+
+### Example 1: [Concrete Use Case Name]
+
+**Scenario:** [Brief description of the scenario]
+
+**Input:**
+```
+[Example input data/code]
+```
+
+**Steps:**
+1. [What to do]
+2. [Next step]
+
+**Output:**
+```
+[Expected output]
+```
+
+### Example 2: [Another Use Case]
+
+[Another complete example showing different aspect of the skill]
+
+## Best Practices
+
+- [Specific practice related to this skill]
+- [Another important practice]
+- [Third practice]
+- [Fourth practice]
+
+## Common Issues
+
+### Issue 1: [Problem Description]
+**Problem:** [Detailed description of the issue]
+
+**Solution:** [How to resolve it]
+
+### Issue 2: [Another Problem]
+**Problem:** [Description]
+
+**Solution:** [Resolution steps]
+
+## Additional Resources
+
+- [Link to related documentation]
+- [Reference to related skills]
+- [External resources if applicable]