anthropics/skills is a public collection of Agent Skills: portable, task-focused instruction packages that help coding agents handle repeatable workflows such as creating documents, PDFs, spreadsheets, and slides. The repository’s key idea is refreshingly simple: put domain knowledge inside a SKILL.md file, keep related scripts or reference files beside it, and let an agent load the right workflow when the task matches. Instead of pasting a giant prompt every time you need a report or spreadsheet, you version a reusable skill alongside your project. Start by inspecting the available skills locally: git clone --depth 1 https://github.com/anthropics/skills.git cd skills find . -name SKILL.md -maxdepth 3 A typical skill directory follows this shape: my-skill/ ├── SKILL.md ├── scripts/ │ └── validate_output.py └── references/ └── style-guide.md For a project-level workflow, create a skill in the location supported by your agent or IDE. The important contract is the SKILL.md file: it should define when the skill applies, the expected output, validation steps, and any tooling constraints. --- name: api-review description: "Review API changes for compatibility, error handling, and documentation gaps." --- # API Review Workflow 1. Read the changed API routes and schema definitions. 2. Identify breaking request or response changes. 3. Produce a markdown checklist with file references. 4. Do not modify source files unless explicitly requested. This structure is especially useful in Cursor-style IDE workflows: keep team conventions in version control, make them discoverable, and avoid relying on every developer’s personal prompt history. The repository’s +277 stars today makes sense because Skills address a real agent-engineering problem: repeatability. A good skill combines instructions, references, and executable checks into a reviewable unit. Before adopting Skills broadly, watch for: Instruction drift: outdated SKILL.md files can encode obsolete APIs or team conventions. Review them like production code. Overly broad triggers: a skill should have a narrow description, or an agent may apply it to unrelated tasks and add unnecessary steps. Treat Skills as lightweight automation playbooks. Small, focused, versioned workflows usually outperform one massive “do everything” agent prompt.