A read-only checker that runs Kerf's local validation commands and reports whether they pass, including optional tests for the ffmpeg program. It reports the relevant command output but does not change files.

Use it to run the checks associated with committing and pushing Kerf changes, and to diagnose failed tests.

It gives a repeatable check after a change and can show failures before a commit or push.

How OrellBuehler/kerf configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to OrellBuehler/kerf. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/OrellBuehler/kerf/main/.claude/agents/verifier.md

Clone the repo

git clone --depth 1 https://github.com/OrellBuehler/kerf

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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/orellbuehler/kerf/verifier/github.svg)](https://agentmods.dev/agents/orellbuehler/kerf/verifier)

Your own site

<a href="https://agentmods.dev/agents/orellbuehler/kerf/verifier"><img src="https://agentmods.dev/badge/agents/orellbuehler/kerf/verifier/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/orellbuehler/kerf/verifier"><img src="https://agentmods.dev/badge/agents/orellbuehler/kerf/verifier.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 54 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 378 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 unknown 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.

Model	Per session	Once invoked
Fable 5.1	$0.00054	$0.00378
Opus 5.5	$0.00022	$0.00151
Sonnet 5.5	$0.00011	$0.00076
Haiku 4.5	$0.00005	$0.00038

Measured 1mo ago against content hash 54fa5c186abd, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 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.

.claude/agents/verifier.md · 33 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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.

1mo ago First seen · 33 lines · 54 tokens per session scan A 54fa5c186abd

Subscribe to this mod's changes

verifier is an agent published in the GitHub repository OrellBuehler/kerf (12 stars, last pushed yesterday), with no licence file. It adds 54 tokens to every session and 378 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-10-01.

Git and workflow LLM Testing ai ai-video-editing claude desktop-app ffmpeg

verifier next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
verifierOrellBuehler/kerf	Agent	12	yesterday	none	A	54	Claude Code
Agent Prompt: Session title and branch generationopenonion/connectonion	Agent	1.5k	yesterday	Apache-2.0	A	19	Claude Code
bashopensolon/solon-ai	Agent	470	3d ago	Apache-2.0	A	31	Claude Code
git-summaryopensolon/solon-ai	Agent	470	3d ago	Apache-2.0	A	23	Claude Code
vibe-environment-workerclosedloop-ai/claude-plugins	Agent	123	yesterday	Apache-2.0	A	261	Claude Code
checkfy-agent/fyagent	Agent	218	yesterday	none	A	34	Claude Code
implementfy-agent/fyagent	Agent	218	yesterday	none	A	28	Claude Code

kerf: Agent for Claude Code