Verification before completion
Forces the agent to actually run the thing before it claims to be finished.
Installation
$ npx skills add obra/superpowersThe CLI's unit is the repository, so this installs everything in obra/superpowers, not verification-before-completion alone. It writes into whichever agent directories it finds — Claude Code, Codex, Cursor, Copilot, Windsurf, Zed.
Summary
Forces the agent to actually run the thing before it claims to be finished.
- Reach for it when the failure mode you keep hitting is a confident summary of work that does not build.
- Sits in Test — proving the change does what it claims — and finding the assertions that were never written.
- Stack-agnostic — nothing in it assumes a particular language or framework.
- Published by Jesse Vincent. Well regarded, but not the vendor of the thing it covers.
- Installing pulls the whole obra/superpowers repository: this catalogue lists 13 other entries from it, and the repo may hold more.
Where it sits in delivery
TestProving the change does what it claims — and finding the assertions that were never written.Everything in Test →
The skill itself
The full text lives with its publisher and changes when they change it. Read it there rather than here — a mirrored copy of somebody else's procedure goes stale silently, and this page would have no way of telling you.
Related
More in Test
- PlaywrightAuthoring Playwright tests, shipped in the Playwright repository itself — locators, waiting, fixtures, traces.
microsoft/playwright - Mutation testingBreaks the code on purpose to find out whether the suite notices — the only honest measure of test quality.
trailofbits/skills - Property-based testingTests the invariant across generated inputs instead of the three examples you thought of.
trailofbits/skills - TDD (Osmani)The same discipline in the SDLC set, so it composes with the planning and review skills beside it.
addyosmani/agent-skills - Code testing agentA multi-agent pipeline that researches, plans and then generates a working test suite — language-agnostic despite the publisher.Agent
dotnet/skills - Test gap analysisFinds the behaviour that no test currently exercises and reports it as a list.Agent
dotnet/skills