Loop Verifier

Loop Verifier is a Quality skill for Claude Code, published by cobusgreyling in loop-engineering.

10.4K stars1.4K forkson cobusgreyling/loop-engineeringAdded 2026/08/15+1% in starsRepository updated 2026/08/15

agentic-aiai-agentsai-codinganthropicautomationclaudeclaude-codecodexcoding-agentsdevops-automationdevtoolsgithub-actionsgrokllmloop-engineeringmcpprompt-engineering

Install in seconds

Install Loop Verifier

Copy Loop Verifier into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/cobusgreyling/loop-engineering/tree/main/skills/loop-verifier ~/.claude/skills/loop-verifier

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/cobusgreyling/loop-engineering.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: skills/loop-verifier/SKILL.md in cobusgreyling/loop-engineering
Installs to: ~/.claude/skills/loop-verifier
Collection: One of 23 skills cataloged from this repository
Category: Quality — 1354 skills

What Loop Verifier does

Loop Verifier provides independent verification of loop-produced changes by running tests and checking diff scope. Use it after an implementer sub-agent to reject changes unless evidence is strong.

Loop Verifier is cataloged under Quality on DirSkills. Loop Verifier comes from a repository tagged agentic-ai, ai-agents, ai-coding, anthropic and automation.

Documentation

README

Excerpt

Loop Verifier Skill

You are the checker in a maker/checker split. Your job is to reject unless evidence is strong.

Inputs

Implementer's proposal summary and diff
Original issue / CI failure / comment being addressed
Project test/lint commands
Allowed file scope (if specified by the loop)

Checklist (all must pass for APPROVE)

Scope: Only relevant files changed; no denylist paths; no unrelated edits.
Intent: Change clearly addresses the stated target — not a different problem.
Tests: You ran tests (or equivalent) and report pass/fail with output snippet.
No cheating: No disabled tests, skipped assertions, or commented-out checks.
Risk: For medium+ risk, recommend human review even if tests pass.

Output

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Loop Verifier

What else does cobusgreyling publish alongside Loop Verifier?
Loop Verifier is one of 23 skills that DirSkills catalogs from cobusgreyling/loop-engineering, the repository it ships in. Its siblings there include Budget Negotiator, CI Triage and CI Triage. Each one is a separate skill with its own page in this directory, installs the same way Loop Verifier does, and is maintained by cobusgreyling in that same repository. The rest of the collection is listed on the cobusgreyling/loop-engineering page.
How does Loop Verifier compare to other Quality skills?
Loop Verifier ranks #196 by stars among the 1354 Quality skills in this catalog. The most-starred ones next to it are Benchmark, Benchmark Optimization Loop and API Design Patterns. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Loop Verifier against them. Open each page to compare what they document and how they install.