Verify This

When someone says "did that fix it" or "prove it works," this skill forces you to capture baseline and treatment evidence from the actual system, compare them, and return one of three verdicts: VERIFIED, NOT VERIFIED, or INCONCLUSIVE. It walks you through restating vague claims as falsifiable tests, picking a minimal local surface like a CLI command or screenshot, and diffing raw artifacts with the same environment and warmup. The workflow is opinionated about structure and honest about negative results. If you've ever merged a PR based on "trust me, it's faster now" and later regretted it, this gives you the repeatable evidence habit you were missing.

skills.sh installs: 2.5K
GitHub stars: 15.9K
last updated: Aug 21, 2026

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Install

$ npx -y skills add cursor/plugins --skill verify-this --agent claude-code

Installs into .claude/skills of the current project.

Files

Verify This

Verification is not a recap. It proves or disproves a specific claim with repeatable evidence.

When To Use

The user asks "verify this", "prove it works", "did this fix it", or "show me the evidence".
A bug fix needs a before/after repro.
A UI, CLI, API, performance, or memory claim needs measurement.
A test passes but the user-visible behavior still needs confirmation.

Do not use this for vague claims like "the code is cleaner". Ask for a measurable claim first.

Workflow

Restate the claim in falsifiable form: condition, metric, and threshold.
Pick the smallest local surface that can disprove it.
Capture a baseline from the old state: merge base, parent commit, failing branch, or current broken repro.
Capture treatment from the changed state with the same command, data, warmup, and environment.
Compare raw artifacts: numbers, screenshots, terminal transcripts, HTTP responses, profiles, heap snapshots, or test output.
Return exactly one verdict: VERIFIED, NOT VERIFIED, or INCONCLUSIVE.