DX Harness

Audits, scaffolds, and maintains the developer-experience harness of a repository. The harness is the meta-tooling that makes a dev loop fast: one-command bootstrap, one-command reset, one-command seed, discoverable conventions, agent-friendly entry points.

This skill exists because dev-experience attrition is real: harnesses rot, manual steps creep back in, conventions drift, and the cost is paid in micro-friction every day. The skill detects attrition systematically and applies canonical fixes.

When to Apply

Trigger this skill when:

• A user describes a repeated manual chore ("every time I reset the db I have to re-register", "I always run these three commands before working")
• A user mentions slow onboarding or asks "how do I get this running"
• A new repo is being bootstrapped and needs a harness from day one
• A user explicitly asks to audit DX or measure time-to-first-commit (TTFC)
• A user asks to fix missing bootstrap/reset/seed scripts or AGENTS.md
• A periodic maintenance pass is needed (e.g., after a release, after onboarding a new engineer)

Workflow Overview