mercury-agent-skills

Anthropic Skills collects Claude skill examples, the Agent Skills specification, and a starter template for document, development, enterprise, communication, and creative tasks. The repository can be registered as a Claude Code plugin marketplace, and its example skills can also be used through Claude.ai or the API. A custom skill is a directory containing a SKILL.md file with YAML frontmatter and instructions. Most examples use Apache 2.0, while the document-creation skills are source-available rather than open source.

awesome-claude-skills curates Claude skills, resources, and tools for document work, development, data, communication, media, project collaboration, and security, with guidance for creating custom skills. It also highlights the connect-apps plugin, which uses Composio to connect Claude to more than 500 apps for actions such as email, issues, and Slack posts. That connector needs a Composio API key, and listed projects have their own setup and licenses.

SkillsVote connects skill collection, profiling, just-in-time recommendation, and post-task attribution into one lifecycle workflow. It offers a hosted integration for recommendation and feedback, plus a local-first option for private SKILL.md libraries. Local attribution and evolution are still on the roadmap rather than fully available.

Venice Skills packages the Venice API into separate, on-demand Agent Skills for authentication, chat, Responses, embeddings, image generation, image editing, and other surface areas. Each folder contains a `SKILL.md` that an agent runtime can load when the corresponding endpoint is needed, and the catalog is maintained alongside the API specification. You can install the full `skills` directory or only selected folders into Claude Code, Codex, Cursor, Hermes, and compatible hosts. This is instruction material for agents, not a standalone Venice client.