Addy Osmani
An engineering lead at Google and thought leader in AI engineering, known for articulating the view that the engineer's role is evolving from "someone who writes code" to "someone accountable for outcomes."
Timeline (last 90 days)
Addy's skill pack is the only one among the three that covers the complete SDLC, and is described as being installable into approximately 70 different agents.
Addy Osmani's methodology is a software engineering lifecycle consisting of six phases—Design, Plan, Build, Verify, Review, and Ship—each corresponding to a slash command.
Addy's skill pack contains 25 skills, plus four reviewer personas: senior engineer, test engineer, security auditor, and web performance auditor.
The build auto mode in Addy's skill pack allows users to approve a plan once and then have tasks run automatically, but each task still follows test-driven development with individual commits, stopping upon failure.
Each of Addy's skills comes with a rationalization-prevention table that preemptively lists the excuses an agent might use to skip a step, along with counter-arguments.
Addy Osmani was formerly a principal engineer at Google and has since joined Anthropic.
Addy Osmani open-sourced his complete set of agent skills, which garnered 100,000 stars shortly after launch, making it one of the most popular AI repositories on GitHub.
Agent Skills was developed by Addy Osmani and breaks development into six phases—define, plan, build, validate, review, and release—and is compatible with Claude Code, Cursor, Gemini CLI, Codex, and other agents that accept Markdown.
Addy Osmani refers to humans being responsible for delivery as 'owning the outer loop'
Former Chrome team member Addy Osmani has joined Anthropic and authored a usage guide for Opus 5.5.
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All Facts (10)
Addy's skill pack is the only one among the three that covers the complete SDLC, and is described as being installable into approximately 70 different agents.
50%UnverifiedAddy's skill pack contains 25 skills, plus four reviewer personas: senior engineer, test engineer, security auditor, and web performance auditor.
50%UnverifiedThe build auto mode in Addy's skill pack allows users to approve a plan once and then have tasks run automatically, but each task still follows test-driven development with individual commits, stopping upon failure.
50%UnverifiedEach of Addy's skills comes with a rationalization-prevention table that preemptively lists the excuses an agent might use to skip a step, along with counter-arguments.
50%UnverifiedAddy Osmani was formerly a principal engineer at Google and has since joined Anthropic.
50%UnverifiedAddy Osmani open-sourced his complete set of agent skills, which garnered 100,000 stars shortly after launch, making it one of the most popular AI repositories on GitHub.
50%UnverifiedAddy Osmani's methodology is a software engineering lifecycle consisting of six phases—Design, Plan, Build, Verify, Review, and Ship—each corresponding to a slash command.
50%UnverifiedAgent Skills was developed by Addy Osmani and breaks development into six phases—define, plan, build, validate, review, and release—and is compatible with Claude Code, Cursor, Gemini CLI, Codex, and other agents that accept Markdown.
50%UnverifiedAddy Osmani refers to humans being responsible for delivery as 'owning the outer loop'
50%UnverifiedFormer Chrome team member Addy Osmani has joined Anthropic and authored a usage guide for Opus 5.5.
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