docs: Consolidate AGENTS.md into CLAUDE.md via symlink

- Migrated all valuable architecture content from AGENTS.md into CLAUDE.md
- Created new 'Plugin and Skill Architecture' section in CLAUDE.md
- Includes: Core Concepts (Skills, Plugins, Agents, Commands)
- Includes: Architecture diagrams, installation flow, data flow
- Includes: Common misconceptions and best practices
- Deleted original AGENTS.md file
- Created symlink AGENTS.md -> CLAUDE.md to avoid duplicate maintenance
- Updated internal references to point to CLAUDE.md sections

This consolidation ensures single source of truth for plugin/skill architecture documentation.
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daymade
2026-01-11 16:21:49 +08:00
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# Claude Code Architecture: Plugins, Skills, and Agents
This document explains the architecture of Claude Code's extension system and how different components work together.
## Core Concepts
### 1. Skills
**What**: Functional units that extend Claude's capabilities with specialized knowledge and workflows.
**Structure**:
```
skill-name/
├── SKILL.md (required) # YAML frontmatter + Markdown instructions
├── scripts/ (optional) # Executable code (Python/Bash)
├── references/ (optional) # Documentation loaded as needed
└── assets/ (optional) # Templates and resources
```
**Loading mechanism** (Progressive Disclosure):
1. **Metadata** (~100 tokens): Always in context (name + description from YAML frontmatter)
2. **SKILL.md body** (<5k tokens): Loaded when Claude determines the skill applies
3. **Bundled resources**: Loaded only as needed by Claude
**Location**:
- **Personal**: `~/.claude/skills/` (user-specific, not shared)
- **Project**: `.claude/skills/` (checked into git, shared with team)
- **Plugin cache**: `~/.claude/plugins/cache/{marketplace}/{plugin}/{version}/{skill}/`
**Example**: When you ask "analyze my disk space", Claude loads the `macos-cleaner` skill's SKILL.md, then reads `references/cleanup_targets.md` as needed.
### 2. Plugins
**What**: Distribution units that package one or more skills for installation via marketplaces.
**Purpose**: Plugins enable:
- One-command installation (`claude plugin install skill-name@marketplace-name`)
- Version management
- Dependency tracking
- Marketplace distribution
**Relationship to Skills**:
```
Plugin (marketplace.json entry)
├── Skill 1 (./skill-name-1/)
├── Skill 2 (./skill-name-2/)
└── Skill 3 (./skill-name-3/)
```
**Configuration** (in `.claude-plugin/marketplace.json`):
```json
{
"name": "my-plugin",
"description": "Use when...",
"version": "1.0.0",
"category": "utilities",
"keywords": ["keyword1", "keyword2"],
"skills": ["./skill-1", "./skill-2"]
}
```
**Example**: The `skill-creator` plugin contains one skill (`./skill-creator`), while a hypothetical `developer-tools` plugin might contain multiple skills like `./git-helper`, `./code-reviewer`, `./test-runner`.
### 3. Agents (Subagents)
**What**: Specialized autonomous agents invoked via the `Task` tool for complex, multi-step operations.
**Types**:
- **Bash**: Command execution specialist
- **general-purpose**: Research, search, multi-step tasks
- **Explore**: Fast codebase exploration
- **Plan**: Software architecture planning
- **skill-creator**: Meta-agent for creating skills
- **Custom**: Domain-specific agents (e.g., `test-runner`, `build-validator`)
**When to use**:
- Tasks requiring multiple rounds of tool calls
- Open-ended exploration (finding files, searching code)
- Planning before implementation
- Autonomous execution without user intervention
**Example**:
```python
# Instead of manually searching multiple times:
Task(
subagent_type="Explore",
description="Find error handling code",
prompt="Search the codebase for error handling patterns and list all files that handle HTTP errors"
)
```
### 4. Commands
**What**: Slash commands (e.g., `/commit`, `/review-pr`) that trigger skills.
**Relationship**: Commands are shortcuts to invoke skills.
- `/commit` → invokes `commit` skill
- `/review-pr` → invokes `review-pr` skill
**Configuration**: Defined in plugin's `commands/` directory or skill metadata.
## Architecture Diagram
```
Marketplace (GitHub)
↓ (git clone)
~/.claude/plugins/marketplaces/{marketplace-name}/
↓ (plugin install)
~/.claude/plugins/cache/{marketplace-name}/{plugin}/{version}/
├── skill-1/
│ ├── SKILL.md
│ ├── scripts/
│ └── references/
└── skill-2/
└── SKILL.md
↓ (Claude loads)
Claude Code Context
├── Metadata (always loaded)
├── SKILL.md (loaded when relevant)
└── Resources (loaded as needed)
```
## Installation Flow
### Step 1: User initiates installation
```bash
claude plugin install macos-cleaner@daymade-skills
```
### Step 2: CLI locates marketplace
```bash
# Check ~/.claude/plugins/marketplaces/daymade-skills/
# If not exists, git clone from GitHub
```
### Step 3: Read marketplace.json
```json
{
"plugins": [
{
"name": "macos-cleaner",
"version": "1.0.0",
"skills": ["./macos-cleaner"]
}
]
}
```
### Step 4: Download to cache
```bash
# Clone entire marketplace repo to:
~/.claude/plugins/cache/daymade-skills/macos-cleaner/1.0.0/
# Extract skill to:
~/.claude/plugins/cache/daymade-skills/macos-cleaner/1.0.0/macos-cleaner/
```
### Step 5: Record installation
```json
// ~/.claude/plugins/installed_plugins.json
{
"plugins": {
"macos-cleaner@daymade-skills": [{
"scope": "user",
"installPath": "~/.claude/plugins/cache/daymade-skills/macos-cleaner/1.0.0",
"version": "1.0.0",
"installedAt": "2026-01-11T08:03:46.593Z"
}]
}
}
```
### Step 6: Claude Code loads skill
```
When user asks: "My Mac is running out of space"
Claude scans installed plugins metadata
Finds "macos-cleaner" description matches
Loads SKILL.md into context
Executes workflow (analyze → report → confirm → cleanup)
Loads references/scripts as needed
```
## Key Files and Locations
### Configuration Files
| File | Location | Purpose |
|------|----------|---------|
| `marketplace.json` | `~/.claude/plugins/marketplaces/{name}/.claude-plugin/` | Defines available plugins |
| `installed_plugins.json` | `~/.claude/plugins/` | Tracks installed plugins |
| `known_marketplaces.json` | `~/.claude/plugins/` | Lists registered marketplaces |
### Directory Structure
```
~/.claude/
├── skills/ # Personal skills (not from marketplace)
├── plugins/
│ ├── marketplaces/ # Marketplace clones
│ │ ├── daymade-skills/ # Marketplace name
│ │ │ └── .claude-plugin/
│ │ │ └── marketplace.json
│ │ └── anthropic-agent-skills/
│ ├── cache/ # Installed plugins
│ │ └── daymade-skills/
│ │ └── macos-cleaner/
│ │ └── 1.0.0/ # Version
│ │ └── macos-cleaner/ # Skill directory
│ │ ├── SKILL.md
│ │ ├── scripts/
│ │ └── references/
│ ├── installed_plugins.json # Installation registry
│ └── known_marketplaces.json # Marketplace registry
```
## Data Flow
### Skill Activation
```
User message
Claude analyzes installed plugin metadata
Matches description to user intent
Loads SKILL.md (progressive disclosure)
Executes instructions
Loads bundled resources (scripts, references) as needed
Generates response
```
### Plugin Update
```
Local changes to skill
git add & commit
git push to GitHub
User runs: claude plugin marketplace update {marketplace-name}
CLI pulls latest from GitHub
Updates ~/.claude/plugins/marketplaces/{marketplace-name}/
User runs: claude plugin update {plugin-name@marketplace}
Re-downloads to cache with new version number
Updates installed_plugins.json
```
## Common Misconceptions
### ❌ Myth 1: "Updating local files immediately updates the plugin"
**Reality**: Plugins are distributed via GitHub. Local changes require `git push` before users can install updates.
### ❌ Myth 2: "Skills and plugins are the same thing"
**Reality**: Skills are functional units (SKILL.md + resources). Plugins are distribution packages (can contain multiple skills).
### ❌ Myth 3: "marketplace.json is just metadata"
**Reality**: marketplace.json is the **source of truth** for plugin discovery. Without correct configuration here, `claude plugin install` will fail with "Plugin not found".
### ❌ Myth 4: "Cache is just for performance"
**Reality**: Cache (`~/.claude/plugins/cache/`) is where installed plugins actually live. Deleting cache uninstalls all plugins.
### ❌ Myth 5: "Skills in ~/.claude/skills/ work the same as plugin skills"
**Reality**:
- `~/.claude/skills/` = Personal skills (manual management, no versioning)
- Plugin cache = Managed by CLI (versioned, updateable, shareable)
## Best Practices
### For Skill Authors
1. **Clear metadata**: Description should clearly state "Use when..." to help Claude match user intent
2. **Progressive disclosure**: Keep SKILL.md lean, move details to `references/`
3. **Test locally first**: Copy to `~/.claude/skills/` for testing before packaging
4. **Version properly**: Use semver (MAJOR.MINOR.PATCH) in marketplace.json
5. **Document bundled resources**: All scripts and references should be mentioned in SKILL.md
### For Marketplace Maintainers
1. **Git workflow**: Always `git push` after updating marketplace.json
2. **Validate JSON**: Run `python -m json.tool marketplace.json` before committing
3. **Update cache**: Remind users to run `claude plugin marketplace update` after releases
4. **Version consistency**: Marketplace version ≠ plugin versions (they track independently)
### For Users
1. **Update marketplaces**: Run `claude plugin marketplace update {name}` periodically
2. **Check installed plugins**: Inspect `~/.claude/plugins/installed_plugins.json`
3. **Clear cache on issues**: `rm -rf ~/.claude/plugins/cache/{marketplace-name}` then reinstall
4. **Understand scopes**:
- `--scope user`: Only you (default)
- `--scope project`: Shared with team via `.claude/plugins/`
- `--scope local`: Gitignored, local only
## Troubleshooting Guide
See [CLAUDE.md § Plugin and Skill Troubleshooting](#plugin-and-skill-troubleshooting) for detailed debugging steps.
## References
- [Official Skills Documentation](https://code.claude.com/docs/en/skills)
- [Plugin Reference](https://code.claude.com/docs/en/plugins-reference)
- [Marketplace Discovery](https://code.claude.com/docs/en/discover-plugins)
- [Anthropic Skills Best Practices](https://docs.claude.com/en/docs/agents-and-tools/agent-skills/best-practices.md)

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CLAUDE.md

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CLAUDE.md
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@@ -690,6 +690,312 @@ Always consult Anthropic's skill authoring best practices before creating or upd
https://docs.claude.com/en/docs/agents-and-tools/agent-skills/best-practices.md
- remember this release workflow in claude.md
## Plugin and Skill Architecture
This section explains the architecture of Claude Code's extension system and how different components work together.
### Core Concepts
#### 1. Skills
**What**: Functional units that extend Claude's capabilities with specialized knowledge and workflows.
**Structure**:
```
skill-name/
├── SKILL.md (required) # YAML frontmatter + Markdown instructions
├── scripts/ (optional) # Executable code (Python/Bash)
├── references/ (optional) # Documentation loaded as needed
└── assets/ (optional) # Templates and resources
```
**Loading mechanism** (Progressive Disclosure):
1. **Metadata** (~100 tokens): Always in context (name + description from YAML frontmatter)
2. **SKILL.md body** (<5k tokens): Loaded when Claude determines the skill applies
3. **Bundled resources**: Loaded only as needed by Claude
**Location**:
- **Personal**: `~/.claude/skills/` (user-specific, not shared)
- **Project**: `.claude/skills/` (checked into git, shared with team)
- **Plugin cache**: `~/.claude/plugins/cache/{marketplace}/{plugin}/{version}/{skill}/`
**Example**: When you ask "analyze my disk space", Claude loads the `macos-cleaner` skill's SKILL.md, then reads `references/cleanup_targets.md` as needed.
#### 2. Plugins
**What**: Distribution units that package one or more skills for installation via marketplaces.
**Purpose**: Plugins enable:
- One-command installation (`claude plugin install skill-name@marketplace-name`)
- Version management
- Dependency tracking
- Marketplace distribution
**Relationship to Skills**:
```
Plugin (marketplace.json entry)
├── Skill 1 (./skill-name-1/)
├── Skill 2 (./skill-name-2/)
└── Skill 3 (./skill-name-3/)
```
**Configuration** (in `.claude-plugin/marketplace.json`):
```json
{
"name": "my-plugin",
"description": "Use when...",
"version": "1.0.0",
"category": "utilities",
"keywords": ["keyword1", "keyword2"],
"skills": ["./skill-1", "./skill-2"]
}
```
**Example**: The `skill-creator` plugin contains one skill (`./skill-creator`), while a hypothetical `developer-tools` plugin might contain multiple skills like `./git-helper`, `./code-reviewer`, `./test-runner`.
#### 3. Agents (Subagents)
**What**: Specialized autonomous agents invoked via the `Task` tool for complex, multi-step operations.
**Types**:
- **Bash**: Command execution specialist
- **general-purpose**: Research, search, multi-step tasks
- **Explore**: Fast codebase exploration
- **Plan**: Software architecture planning
- **skill-creator**: Meta-agent for creating skills
- **Custom**: Domain-specific agents (e.g., `test-runner`, `build-validator`)
**When to use**:
- Tasks requiring multiple rounds of tool calls
- Open-ended exploration (finding files, searching code)
- Planning before implementation
- Autonomous execution without user intervention
**Example**:
```python
# Instead of manually searching multiple times:
Task(
subagent_type="Explore",
description="Find error handling code",
prompt="Search the codebase for error handling patterns and list all files that handle HTTP errors"
)
```
#### 4. Commands
**What**: Slash commands (e.g., `/commit`, `/review-pr`) that trigger skills.
**Relationship**: Commands are shortcuts to invoke skills.
- `/commit` → invokes `commit` skill
- `/review-pr` → invokes `review-pr` skill
**Configuration**: Defined in plugin's `commands/` directory or skill metadata.
### Architecture Diagram
```
Marketplace (GitHub)
↓ (git clone)
~/.claude/plugins/marketplaces/{marketplace-name}/
↓ (plugin install)
~/.claude/plugins/cache/{marketplace-name}/{plugin}/{version}/
├── skill-1/
│ ├── SKILL.md
│ ├── scripts/
│ └── references/
└── skill-2/
└── SKILL.md
↓ (Claude loads)
Claude Code Context
├── Metadata (always loaded)
├── SKILL.md (loaded when relevant)
└── Resources (loaded as needed)
```
### Installation Flow
#### Step 1: User initiates installation
```bash
claude plugin install macos-cleaner@daymade-skills
```
#### Step 2: CLI locates marketplace
```bash
# Check ~/.claude/plugins/marketplaces/daymade-skills/
# If not exists, git clone from GitHub
```
#### Step 3: Read marketplace.json
```json
{
"plugins": [
{
"name": "macos-cleaner",
"version": "1.0.0",
"skills": ["./macos-cleaner"]
}
]
}
```
#### Step 4: Download to cache
```bash
# Clone entire marketplace repo to:
~/.claude/plugins/cache/daymade-skills/macos-cleaner/1.0.0/
# Extract skill to:
~/.claude/plugins/cache/daymade-skills/macos-cleaner/1.0.0/macos-cleaner/
```
#### Step 5: Record installation
```json
// ~/.claude/plugins/installed_plugins.json
{
"plugins": {
"macos-cleaner@daymade-skills": [{
"scope": "user",
"installPath": "~/.claude/plugins/cache/daymade-skills/macos-cleaner/1.0.0",
"version": "1.0.0",
"installedAt": "2026-01-11T08:03:46.593Z"
}]
}
}
```
#### Step 6: Claude Code loads skill
```
When user asks: "My Mac is running out of space"
Claude scans installed plugins metadata
Finds "macos-cleaner" description matches
Loads SKILL.md into context
Executes workflow (analyze → report → confirm → cleanup)
Loads references/scripts as needed
```
### Key Files and Locations
#### Configuration Files
| File | Location | Purpose |
|------|----------|---------|
| `marketplace.json` | `~/.claude/plugins/marketplaces/{name}/.claude-plugin/` | Defines available plugins |
| `installed_plugins.json` | `~/.claude/plugins/` | Tracks installed plugins |
| `known_marketplaces.json` | `~/.claude/plugins/` | Lists registered marketplaces |
#### Directory Structure
```
~/.claude/
├── skills/ # Personal skills (not from marketplace)
├── plugins/
│ ├── marketplaces/ # Marketplace clones
│ │ ├── daymade-skills/ # Marketplace name
│ │ │ └── .claude-plugin/
│ │ │ └── marketplace.json
│ │ └── anthropic-agent-skills/
│ ├── cache/ # Installed plugins
│ │ └── daymade-skills/
│ │ └── macos-cleaner/
│ │ └── 1.0.0/ # Version
│ │ └── macos-cleaner/ # Skill directory
│ │ ├── SKILL.md
│ │ ├── scripts/
│ │ └── references/
│ ├── installed_plugins.json # Installation registry
│ └── known_marketplaces.json # Marketplace registry
```
### Data Flow
#### Skill Activation
```
User message
Claude analyzes installed plugin metadata
Matches description to user intent
Loads SKILL.md (progressive disclosure)
Executes instructions
Loads bundled resources (scripts, references) as needed
Generates response
```
#### Plugin Update
```
Local changes to skill
git add & commit
git push to GitHub
User runs: claude plugin marketplace update {marketplace-name}
CLI pulls latest from GitHub
Updates ~/.claude/plugins/marketplaces/{marketplace-name}/
User runs: claude plugin update {plugin-name@marketplace}
Re-downloads to cache with new version number
Updates installed_plugins.json
```
### Common Misconceptions
#### ❌ Myth 1: "Updating local files immediately updates the plugin"
**Reality**: Plugins are distributed via GitHub. Local changes require `git push` before users can install updates.
#### ❌ Myth 2: "Skills and plugins are the same thing"
**Reality**: Skills are functional units (SKILL.md + resources). Plugins are distribution packages (can contain multiple skills).
#### ❌ Myth 3: "marketplace.json is just metadata"
**Reality**: marketplace.json is the **source of truth** for plugin discovery. Without correct configuration here, `claude plugin install` will fail with "Plugin not found".
#### ❌ Myth 4: "Cache is just for performance"
**Reality**: Cache (`~/.claude/plugins/cache/`) is where installed plugins actually live. Deleting cache uninstalls all plugins.
#### ❌ Myth 5: "Skills in ~/.claude/skills/ work the same as plugin skills"
**Reality**:
- `~/.claude/skills/` = Personal skills (manual management, no versioning)
- Plugin cache = Managed by CLI (versioned, updateable, shareable)
### Best Practices
#### For Skill Authors
1. **Clear metadata**: Description should clearly state "Use when..." to help Claude match user intent
2. **Progressive disclosure**: Keep SKILL.md lean, move details to `references/`
3. **Test locally first**: Copy to `~/.claude/skills/` for testing before packaging
4. **Version properly**: Use semver (MAJOR.MINOR.PATCH) in marketplace.json
5. **Document bundled resources**: All scripts and references should be mentioned in SKILL.md
#### For Marketplace Maintainers
1. **Git workflow**: Always `git push` after updating marketplace.json
2. **Validate JSON**: Run `python -m json.tool marketplace.json` before committing
3. **Update cache**: Remind users to run `claude plugin marketplace update` after releases
4. **Version consistency**: Marketplace version ≠ plugin versions (they track independently)
#### For Users
1. **Update marketplaces**: Run `claude plugin marketplace update {name}` periodically
2. **Check installed plugins**: Inspect `~/.claude/plugins/installed_plugins.json`
3. **Clear cache on issues**: `rm -rf ~/.claude/plugins/cache/{marketplace-name}` then reinstall
4. **Understand scopes**:
- `--scope user`: Only you (default)
- `--scope project`: Shared with team via `.claude/plugins/`
- `--scope local`: Gitignored, local only
## Plugin and Skill Troubleshooting
This section provides systematic debugging steps for common plugin and skill installation issues.
@@ -1133,6 +1439,6 @@ If you're still stuck:
4. **Document your debugging**: Include output from all diagnostic commands above
For this project specifically, refer to:
- [AGENTS.md](./AGENTS.md) - Architecture overview
- [Plugin and Skill Architecture](#plugin-and-skill-architecture) - Architecture overview (this document)
- [skill-creator/SKILL.md](./skill-creator/SKILL.md) - Skill creation guide
- [CONTRIBUTING.md](./CONTRIBUTING.md) - Development workflow