# Addyosmani

> Web performance engineering

Skills for performance, planning, quality, migrations, and frontend execution.

## Profile stats

- Skills: 35
- Stars: 2.1M
- Installs: 380k
- Best skill: api-and-interface-design

## Links

- HTML page: https://omgskills.com/library/addyosmani/
- GitHub: https://github.com/addyosmani
- X: https://x.com/addyosmani

## Featured skills

- [api-and-interface-design](https://omgskills.com/skills/addyosmani/agent-skills/skills/api-and-interface-design/index.md) — Guides stable API and interface design.
   - [@addyosmani](https://omgskills.com/library/addyosmani/index.md) · 93k stars
- [constraint-driven-development](https://omgskills.com/skills/addyosmani/agent-skills/skills/constraint-driven-development/index.md) — Establishes a project's quality bar as a written contract and stops agents quietly lowering it.
   - [@addyosmani](https://omgskills.com/library/addyosmani/index.md) · 91k stars
- [doubt-driven-development](https://omgskills.com/skills/addyosmani/agent-skills/skills/doubt-driven-development/index.md) — Subjects every non-trivial decision to a fresh-context adversarial review before it stands.
   - [@addyosmani](https://omgskills.com/library/addyosmani/index.md) · 87k stars
- [browser-testing-with-devtools](https://omgskills.com/skills/addyosmani/agent-skills/browser-testing-with-devtools/index.md) — Tests in real browsers via Chrome DevTools MCP.
   - [@addyosmani](https://omgskills.com/library/addyosmani/index.md) · 86k stars
- [ci-cd-and-automation](https://omgskills.com/skills/addyosmani/agent-skills/ci-cd-and-automation/index.md) — Automates CI/CD pipeline setup.
   - [@addyosmani](https://omgskills.com/library/addyosmani/index.md) · 81k stars
- [code-review-and-quality](https://omgskills.com/skills/addyosmani/agent-skills/code-review-and-quality/index.md) — Conducts multi-axis code review.
   - [@addyosmani](https://omgskills.com/library/addyosmani/index.md) · 81k stars
- [code-simplification](https://omgskills.com/skills/addyosmani/agent-skills/code-simplification/index.md) — Simplifies code for clarity.
   - [@addyosmani](https://omgskills.com/library/addyosmani/index.md) · 81k stars
- [context-engineering](https://omgskills.com/skills/addyosmani/agent-skills/context-engineering/index.md) — Optimizes agent context setup.
   - [@addyosmani](https://omgskills.com/library/addyosmani/index.md) · 81k stars
- [debugging-and-error-recovery](https://omgskills.com/skills/addyosmani/agent-skills/debugging-and-error-recovery/index.md) — Guides systematic root-cause debugging.
   - [@addyosmani](https://omgskills.com/library/addyosmani/index.md) · 81k stars
- [deprecation-and-migration](https://omgskills.com/skills/addyosmani/agent-skills/deprecation-and-migration/index.md) — Manages deprecation and migration.
   - [@addyosmani](https://omgskills.com/library/addyosmani/index.md) · 81k stars
- [documentation-and-adrs](https://omgskills.com/skills/addyosmani/agent-skills/documentation-and-adrs/index.md) — Records decisions and documentation.
   - [@addyosmani](https://omgskills.com/library/addyosmani/index.md) · 81k stars
- [frontend-ui-engineering](https://omgskills.com/skills/addyosmani/agent-skills/frontend-ui-engineering/index.md) — Builds production-quality, accessible, responsive user-facing UIs.
   - [@addyosmani](https://omgskills.com/library/addyosmani/index.md) · 81k stars

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