ct-verification-before-completion

Enforces running verification commands before making any completion or success claims.

1|Updated Sep 8, 2026
One-click install
npx skills add https://github.com/mercadona/control-tower --skill ct-verification-before-completion-mercadona
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: ct-verification-before-completion
Source: https://github.com/mercadona/control-tower/tree/main/plugin/skills/ct-verification-before-completion
Command: npx skills add https://github.com/mercadona/control-tower --skill ct-verification-before-completion-mercadona

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? AI agents and developers often claim work is complete, tests pass, or bugs are fixed without actually running the verification commands, leading to broken builds, shipped defects, and lost trust. This Skill eliminates unverified success claims by requiring fresh command output as evidence before any assertion. ## Core Features & Use Cases - Evidence-First Gate: Blocks any completion claim until the relevant verification command (tests, linter, build) has been run and its output read in the current session. - Failure Pattern Detection: Flags rationalizations like "should pass", "linter passed so build works", or trusting agent success reports without checking the VCS diff. - Regression Test Discipline: Enforces the red-green cycle for regression tests, requiring the test to fail when the fix is reverted before it counts as valid. - Use Case: Before committing a bug fix, run the test suite, confirm zero failures in the output, verify the original symptom is resolved, and only then state the fix is complete with the evidence attached. ## Quick Start Before claiming any task is done, run the full verification command, read the complete output including exit code, and only then state the result with that evidence.

Frequently Asked Questions about ct-verification-before-completion

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I verify work is complete before committing code?

Run the full verification command for your claim, such as the test suite or build, and read the complete output including the exit code. Only state the work is complete after the output confirms zero failures, citing that evidence with your claim.

How to verify a regression test actually works?

Use the red-green cycle: write the test, run it to confirm it passes with the fix, revert the fix and confirm the test fails, then restore the fix and confirm it passes again. A test that never fails without the fix proves nothing.

Does a passing linter mean the build succeeds?

No, a linter passing does not prove compilation succeeds. Linters check style and static patterns but do not verify compilation, so you must run the actual build command and confirm exit code 0 before claiming the build passes.

Can I trust an agent's success report without checking?

No, agent success reports must be verified independently. Check the VCS diff to confirm the claimed changes actually exist and run the relevant verification commands yourself before reporting the agent's work as complete.

When should verification run before making claims?

Verification must run before any success claim, expression of satisfaction, commit, pull request, or task handoff. The rule applies to exact phrases, paraphrases, and any wording implying completion, with no exceptions for confidence or fatigue.