vibe-quality-loop

vibe-quality-loop is a skill for Claude Code from mracal/vibe-engineering. It costs 38 tokens per session (617 once invoked), scanned A, a copy of vibe-quality-loop, MIT.

A repeatable workflow for implementing a change, reviewing the result, running tests, fixing problems, and repeating the checks.

In plain words
What is it for?
Use it after non-trivial implementations, especially changes spanning several files or features with tests, and before treating the work as complete.
Why use it?
Stopping after code appears to work can leave review issues or broken existing behavior. This workflow provides a defined loop for finding and correcting those problems.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

Good fit Use it after non-trivial implementations, especially changes spanning several files or features with tests, and before treating the work as complete.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/mracal/vibe-engineering/quality-loop
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add mracal/vibe-engineering --skill quality-loop
Clone the repo
git clone --depth 1 https://github.com/mracal/vibe-engineering

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for vibe-quality-loop

README.md
[![agentmods](https://agentmods.dev/badge/skills/mracal/vibe-engineering/quality-loop/github.svg)](https://agentmods.dev/skills/mracal/vibe-engineering/quality-loop)
Your own site
<a href="https://agentmods.dev/skills/mracal/vibe-engineering/quality-loop"><img src="https://agentmods.dev/badge/skills/mracal/vibe-engineering/quality-loop/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for vibe-quality-loop

Your own site · 80×15
<a href="https://agentmods.dev/skills/mracal/vibe-engineering/quality-loop"><img src="https://agentmods.dev/badge/skills/mracal/vibe-engineering/quality-loop.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 617 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 100% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00038 $0.00617
Opus 5.5 $0.00015 $0.00247
Sonnet 5.5 $0.00008 $0.00123
Haiku 4.5 $0.00004 $0.00062

Measured 1mo ago against content hash ef9d82ed0204, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

vibe-quality-loop scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

100% identical to vibe-quality-loop — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/quality-loop/SKILL.md · 84 lines

How it starts

The opening of the file, as written. The whole thing — 84 lines — stays where its author put it; the contents beside it link to each section on GitHub.

vibe-quality-loop

The quality loop prevents premature "done" declarations. You keep iterating until the work is actually clean.

When to Use This Skill

  • After any implementation that touches more than 3 files
  • After implementing a feature with tests
  • When you've made changes and want to verify quality
  • Before creating a commit on completed work

When NOT to Use This Skill

  • Single-line fixes or typo corrections
  • Documentation-only changes
  • When the user says "just get it working, we'll clean up later"

The Loop

┌─────────────┐
│  Implement   │
└──────┬──────┘
       v
┌─────────────┐
│ Self-Review  │ ← Read your own diff. Would you approve this PR?
└──────┬──────┘
       v
┌─────────────┐
│  Run Tests   │ ← ALL tests, not just the ones you wrote
└──────┬──────┘
       │
       ├── Tests pass + Review clean → EXIT (done!)
       │
       v
┌─────────────┐
│  Fix Issues  │ ← Fix what broke, don't add new features
└──────┬──────┘
       │
       └── Go back to Self-Review

Steps

  1. Self-Review — Read your entire diff. Check for:

    • Unused imports/variables
    • Hardcoded values that should be constants
    • Missing error handling at system boundaries
    • Functions over 50 lines
    • Any TODO without an issue reference
  2. Run Tests — Run the full test suite, not just affected tests:

    • If Go: go test ./... and go test -race ./...
    • If JS/TS: npm test or equivalent
    • If Python: pytest
    • Note any failures
  3. Fix Issues — Address ONLY the issues found. Don't add features.

  4. Loop — Go back to step 1. Track iteration count.

  5. Exit — When tests pass AND review is clean. Report iteration count.

Output Format

Quality Loop: [Feature Name]

Iterations: X Final Status: CLEAN / KNOWN_ISSUES

Iteration Issues Found Issues Fixed
1 [list] [list]
2 [list] [list]

Remaining Known Issues (if any):

  • [Issue that was deliberately deferred, with justification]

Read the full file on GitHub · 84 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 84 lines · 38 tokens per session scan A ef9d82ed0204

Subscribe to this mod's changes

vibe-quality-loop is a skill published in the GitHub repository mracal/vibe-engineering (3 stars, last pushed 7d ago), licensed MIT. It adds 38 tokens to every session and 617 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to vibe-quality-loop, differing in 0 lines, and is treated as a copy.

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