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Agent Skills is an open-source collection of engineering workflow skills for AI coding agents, published by Addy Osmani on GitHub. The skills encode practices such as spec-first development, small atomic tasks, test-driven development, code review and shipping checks, so that agents follow them consistently across the development lifecycle.
The README lists 9 slash commands mapped to lifecycle stages: /spec, /plan, /build, /test, /constraints, /review, /webperf, /code-simplify and /ship. A /build auto mode generates a plan and implements every task after a single approval, with tests and per-task commits. The repo ships 25 skills in total, including interview-me (requirements interrogation), test-driven-development, code-review-and-quality, api-and-interface-design and frontend-ui-engineering. Some skills activate automatically based on the task.
It installs through the open skills CLI (npx skills add addyosmani/agent-skills), which targets 70+ agents including Claude Code, Cursor, Codex, Copilot and Cline. Native integrations are documented for Claude Code (plugin marketplace), Gemini CLI and Antigravity CLI, and Cursor setup is done by copying skills into .cursor/skills/. A noted limit: installing a single skill via npx does not copy the repo-level references/ directory, so shared checklists are missing (tracked as issue #361).
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A skill pack with seven slash commands mapping to engineering stages: spec, plan, build, test, review, simplify and ship. Demoed the interview command, which extracts requirements into a markdown spec. Compared to Garry Tan's G Stack but focused on the engineering workflow.
Closest neighbours by meaning, not just by category.
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Collection of agent skills for AI coding assistants such as Codex, published by developer Matt Pocock.
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MIT-licensed agent skill that generates brand-matched diagrams as a single self-contained HTML + SVG file.
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Open-source agent skills that teach AI coding agents to work with Obsidian vaults, Markdown, Bases, Canvas and the CLI.
Library · Forward Future
Open-source agent skill and web catalog of reusable, bounded AI-agent workflow "loops" with checks and stopping conditions.
Agent
An agent skill that updates other skills by reviewing many recent conversations for recurring feedback.
