loop-verify

loop-verify is a skill for Claude Code, Codex from cbdreamer11/CB-loop-kit-claude-plugin. It costs 39 tokens per session (635 once invoked), scanned A, original, MIT.

A project-verification procedure that checks whether a change works in real use and records what was observed.

In plain words
What is it for?
It helps run the project's required checks, observe real browser, command-line, or endpoint behavior, inspect data changes, and label results as verified, a gap, or unsupported.
Why use it?
It prevents treating a successful build, a zero exit code, or an HTTP 200 response as proof that the intended behavior works.

Skill for Claude CodeCodex

Part of the loop-kit plugin — 7 skills, 6 agents, 2 hooks shipped together

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.

agentmods
npx agentmods add skills/cbdreamer11/cb-loop-kit-claude-plugin/loop-verify
Any agent
npx skills add cbdreamer11/CB-loop-kit-claude-plugin --skill loop-verify
Clone the repo
git clone --depth 1 https://github.com/cbdreamer11/CB-loop-kit-claude-plugin

Made for: Claude Code, Codex.

Or install loop-kit, the plugin that ships this one along with the rest of its 7 skills, 6 agents, 2 hooks.

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 loop-verify

README.md
[![agentmods](https://agentmods.dev/badge/skills/cbdreamer11/cb-loop-kit-claude-plugin/loop-verify.svg)](https://agentmods.dev/skills/cbdreamer11/cb-loop-kit-claude-plugin/loop-verify)
Your own site
<a href="https://agentmods.dev/skills/cbdreamer11/cb-loop-kit-claude-plugin/loop-verify"><img src="https://agentmods.dev/badge/skills/cbdreamer11/cb-loop-kit-claude-plugin/loop-verify.svg" alt="Measured on agentmods" height="20"></a>
Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 635 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found 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 $0.00039 $0.00635
Opus 5 $0.00019 $0.00318
Sonnet 5 $0.00008 $0.00127
Haiku 4.5 $0.00004 $0.00064

Measured 3d ago against content hash aaa8767af929, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

loop-verify 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 3d 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.

skills/loop-verify/SKILL.md · 57 lines

How it starts

The opening of the file, as written. The whole thing — 57 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Verify for real

Read .loop/VERIFY.md and run the slots that apply to what changed. Then write down what you observed, in the words of what you saw — not in the words of what you hoped.

The three things that are not verification

  1. A green build. It proves the code compiles. Nothing else.
  2. "I read the code and it looks right." The bug you are looking for is exactly the one that looks right.
  3. "It should work." Then it is not verified. Say that instead.

Add two more that fool people constantly:

  1. An exit code of 0 — a command can succeed while doing nothing.
  2. An HTTP 200 — many servers answer 200 for a page that does not exist. Verify by finding a string that only exists in the new behaviour, not by status code.

What counts

Each slot must produce an artifact or a direct observation:

  • BUILD — the project's build/test command, green. Necessary, never sufficient.
  • OBSERVE — the thing itself, doing its thing: a page rendered in a real browser with a clean console and a real interaction (click, type, navigate); a CLI run with its real output; an endpoint returning the new field. A screenshot or captured output is the artifact.
  • DATA — query the store and confirm the effect: the row exists, the value changed, the wrong value is refused.
  • MONEY — if money moves, use the provider's test mode and confirm the resulting state changed for real. Never test with live money.

Testing against a real system

If the project has a test database or a seeded environment, use it: set up, run, tear down. That is the default. Working against a live system is an exception that must be declared in .loop/VERIFY.md, and when it is unavoidable: wrap in a transaction and roll back, or restore the fixtures afterwards and confirm nothing was left behind.

Two traps worth naming: your own tooling may run with more privileges than a real user, which hides permission bugs — check with the actual role. And a check that passes for you may fail for a signed-out visitor — check both.

Read the full file on GitHub · 57 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. 3d ago First seen · 57 lines · 39 tokens per session scan A aaa8767af929

Subscribe to this mod's changes

loop-verify is a skill published in the GitHub repository cbdreamer11/CB-loop-kit-claude-plugin (8 stars, last pushed 1mo ago), licensed MIT. It adds 39 tokens to every session and 635 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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