Source: github.com/addyosmani/agent-skills
#Why This Collection
Addy Osmani is a long-standing practitioner in performance and web engineering at Google; his skill collection reflects that lineage — process-driven workflows that encode disciplined engineering rather than prompt tricks. The repository is organized around the software lifecycle (Define, Plan, Build, Verify, Review, Ship) and includes anti-rationalization tables that explicitly counter the shortcuts agents tend to take.
#What's Inside
- 20 skills mapped to six lifecycle phases, including
spec-driven-development,test-driven-development,code-review-and-quality,security-and-hardening, andci-cd-and-automation - Agent personas (code reviewer, test engineer, security auditor) for role-specific behavior
- Mandatory verification gates rather than suggestions
#Value for Practitioners
Closest in spirit to this handbook's "agent-ready environment" framing. If you are designing skills for a team and want a reference for phase-by-phase coverage, this is the most complete public example. Treat the lifecycle taxonomy as a checklist: if your own skills leave a phase uncovered, that's a gap worth naming.