Agent Skills: design, spec, plan, build auto

Agent Skills is a plugin by Addy Osmani — 24 skills for Claude Code (and 70+ other agents) organized into six phases: define, plan, build, verify, review, ship. Install with npx skills add addyosmani/agent-skills.

I don't use all six, and I don't start with /spec either. First step is design — sketch the app visually before writing anything down as a spec. Once I can see roughly how it should look, the spec writes itself: I'm describing a thing I've already looked at, not guessing at one in the abstract.

Design → spec → plan → build auto. Most sessions that's the whole loop.

The three commands

From there it's /spec, which writes the requirement down now that it's grounded in the design instead of a vague idea; /plan, which breaks the spec into small, ordered tasks; and /build auto, which runs the plan end to end, test-driven, and stops on a failing test instead of pushing through.

I get a working, tested change back without babysitting every step in between. What I like about it: it's not over-engineered. A lot of agent-workflow tooling tries to cover every phase of the SDLC with heavy process — review gates, ship checklists, security audits — before you've even confirmed the thing works or looks right. This one lets me skip straight to the part that matters for a solo project: see it, spec it, break it down, let build auto execute without approving every single step.

What I haven't tested

I haven't reached for /review or /ship much — those are built for team settings with PR gates and release checklists, and most of what I build doesn't need that ceremony. So my opinion here is scoped: for solo, fast-moving work, design → spec → plan → build auto covers it. Can't speak yet to how it holds up on a bigger, multi-person codebase with the full six-phase flow in play.