timeline-creator

```

claude-skills-marketplace/

├── .claude-plugin/

│ └── marketplace.json # Marketplace manifest

├── execution-runtime/ # 🚀 Code execution environment (NEW!)

│ ├── api/ # Importable API library

│ ├── mcp-server/ # FastMCP server

│ ├── setup.sh # One-command installation

│ └── README.md

├── engineering-workflow-plugin/ # Engineering workflow plugin

│ ├── .claude-plugin/

│ │ └── plugin.json # Plugin manifest

│ ├── agents/

│ │ └── plan-implementer.md # Plan implementation agent

│ ├── skills/

│ │ ├── feature-planning/ # Feature planning skill

│ │ ├── git-pushing/ # Git automation skill

│ │ ├── review-implementing/ # Code review skill

│ │ └── test-fixing/ # Test fixing skill

│ └── README.md

├── visual-documentation-plugin/ # Visual documentation plugin

│ ├── .claude-plugin/

│ │ └── plugin.json # Plugin manifest

│ ├── skills/

│ │ ├── architecture-diagram-creator/ # Architecture diagram skill

│ │ ├── dashboard-creator/ # Dashboard creation skill

│ │ ├── flowchart-creator/ # Flowchart creation skill

│ │ ├── technical-doc-creator/ # Technical documentation skill

│ │ └── timeline-creator/ # Timeline creation skill

│ ├── EXAMPLES.md

│ └── README.md

├── productivity-skills-plugin/ # Productivity & optimization plugin

│ ├── .claude-plugin/

│ │ └── plugin.json # Plugin manifest

│ ├── skills/

│ │ ├── code-auditor/ # Code auditing skill

│ │ ├── codebase-documenter/ # Codebase documentation skill

│ │ ├── conversation-analyzer/ # Usage analysis skill

│ │ └── project-bootstrapper/ # Project setup skill

│ └── README.md

├── code-operations-plugin/ # Code manipulation plugin

│ ├── .claude-plugin/

│ │ └── plugin.json # Plugin manifest

│ ├── skills/

│ │ ├── code-execution/ # 🚀 Python execution skill (NEW!)

│ │ │ └── examples/ # Example scripts

│ │ ├── code-transfer/ # Code transfer skill

│ │ │ └── scripts/

│ │ │ └── line_insert.py # Line-based insertion script

│ │ ├── code-refactor/ # Bulk refactoring skill

│ │ └── file-operations/ # File analysis skill

│ └── README.md

├── LICENSE

└── README.md

```

Skills are model-invoked capabilities that extend Claude Code's functionality. Unlike slash commands that require explicit user activation, Skills are automatically triggered by Claude based on context and the Skill's description.

Each Skill consists of a SKILL.md file with:

• YAML frontmatter (name, description, metadata)
• Detailed instructions for Claude
• Optional supporting files (scripts, templates, references)

Agents are specialized Claude instances that can be invoked by Claude to handle specific types of work. They run independently with their own context and can use different models optimized for their task.

Each Agent consists of an AGENT.md file with:

• YAML frontmatter (name, description, model selection)
• Specialized instructions and constraints
• Decision-making frameworks for their domain

Skills and Agents work together: Skills can orchestrate when to invoke Agents, and Agents can use Skills while executing their tasks.

The marketplace now includes a code execution environment implementing the [Anthropic code execution pattern](https://www.anthropic.com/engineering/code-execution-with-mcp). Instead of loading code through context, Claude executes Python lo