Anthropic
MCP Builder
MCP Builder is Anthropic's open-source agent skill for building MCP servers in TypeScript or Python, from API research and tool design to testing and a 10-question evaluation.
Agent skills for building skills and mcp servers
3 agent skills for building skills and mcp servers, each from its publisher's own repository or a large open-source project. Open a skill for its license, install command and the date we checked it.
Anthropic
Skill Creator
Skill Creator is Anthropic's open-source agent skill for making skills: the agent drafts a SKILL.md with you, tests it with and without the skill, and tunes its description so it triggers.Jesse Vincent
Writing Skills
Writing Skills is an agent skill from Superpowers: your agent writes new skills test-first, running pressure scenarios with subagents before and after the skill exists.