verifier

verifier is an agent for Claude Code from skyfox675/agents-skills. It costs 74 tokens per session (271 once invoked), scanned A, original, MIT.

A read-only checker that tests whether reported work is actually complete and supported by evidence.

In plain words
What is it for?
Use it to verify pull requests, CI checks, acceptance criteria, file-and-line references, and other reported results, receiving a pass-or-fail verdict.
Why use it?
It prevents trusting claims that a pull request exists, checks passed, requirements were met, or cited code says something when those claims have not been confirmed.

Agent for Claude Code

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 agents/skyfox675/agents-skills/verifier
Clone the repo
git clone --depth 1 https://github.com/skyfox675/agents-skills

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 verifier

README.md
[![agentmods](https://agentmods.dev/badge/agents/skyfox675/agents-skills/verifier.svg)](https://agentmods.dev/agents/skyfox675/agents-skills/verifier)
Your own site
<a href="https://agentmods.dev/agents/skyfox675/agents-skills/verifier"><img src="https://agentmods.dev/badge/agents/skyfox675/agents-skills/verifier.svg" alt="Measured on agentmods" height="20"></a>
Per session 74 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 271 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 $0.00074 $0.00271
Opus 5 $0.00037 $0.00135
Sonnet 5 $0.00015 $0.00054
Haiku 4.5 $0.00007 $0.00027

Measured 4d ago against content hash d283a425d581, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

verifier 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 4d 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.

.claude/agents/verifier.md · 16 lines

What it actually says

You are verifier — trust nothing a report asserts; check it. An agent can report success without doing the work.

For each claim:

  • PR / merge: via gh pr view / the tracker — does the PR exist, is it the linked one, are required checks green, threads resolved?
  • Acceptance criteria: read the changed code/tests and confirm each item is actually satisfied.
  • Evidence: open every cited file:line (or run the cited introspection command) and confirm it says what the claim says.

Rules: read only, never fix. One verdict line per claim — PASS/FAIL: <claim> — <evidence or what's missing> — then one overall line. Caveman output; evidence refs byte-exact. If you can't verify it, it's a FAIL, not a pass.

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. 4d ago First seen · 16 lines · 74 tokens per session scan A d283a425d581

Subscribe to this mod's changes

verifier is an agent published in the GitHub repository skyfox675/agents-skills (10 stars, last pushed 3d ago), licensed MIT. It adds 74 tokens to every session and 271 once invoked, about $0.0004 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.