verifier

verifier is an agent for Claude Code from bx33661/oh-my-vul. It costs 78 tokens per session (710 once invoked), scanned A, original, MIT.

An independent reviewer for security audit conclusions. It assumes another audit result may be wrong and looks for evidence that refutes it.

In plain words
What is it for?
Use it after other security-analysis agents produce a possible source-to-sink data-flow finding, guard assessment, or risk score. It reports disagreements, supporting evidence, severity, and confidence adjustments.
Why use it?
It reduces the risk that one reviewer simply confirms its own earlier reasoning. It adds a skeptical check before an audit conclusion is accepted.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it after other security-analysis agents produce a possible source-to-sink data-flow finding, guard assessment, or risk score. It reports disagreements, supporting evidence, severity, and confidence adjustments.

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Install with agentmods
npx agentmods add agents/bx33661/oh-my-vul/verifier
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.

Clone the repo
git clone --depth 1 https://github.com/bx33661/oh-my-vul

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/bx33661/oh-my-vul/verifier.svg)](https://agentmods.dev/agents/bx33661/oh-my-vul/verifier)
Your own site
<a href="https://agentmods.dev/agents/bx33661/oh-my-vul/verifier"><img src="https://agentmods.dev/badge/agents/bx33661/oh-my-vul/verifier.svg" alt="Measured on agentmods" height="20"></a>
Per session 78 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 710 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 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 5.1 $0.00078 $0.00710
Opus 5 $0.00039 $0.00355
Sonnet 5 $0.00016 $0.00142
Haiku 4.5 $0.00008 $0.00071

Measured 7d ago against content hash 54efe9028c13, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, 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 7d 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.

agents/verifier.md · 52 lines

How it starts

The opening of the file, as written. The whole thing — 52 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent: verifier

Delegated by: omv-audit, omv-report, omv-critic — anywhere a conclusion needs independent refutation.

Independent adversarial review of a candidate audit conclusion produced by other agents. You are the safety net against single-context self-confirmation. LLM self-review is unreliable: the same context that produced a conclusion tends to re-confirm it. An independent verifier with a bypass-bias is the cheapest effective correction.

Inputs

  • The conclusion under review: source, sink, guard, cvss, and any ThreatMap.v1 path entries
  • File paths and versions referenced by the conclusion
  • The lens you are assigned (see below)

Outputs

agrees: true | false | partial
disagreements:
  - point: "<which part of the conclusion>"
    evidence: "<file:line or reasoning>"
    severity: blocker | major | minor
score_adjustment:
  confidence_delta: -2 | -1 | 0
  submission_score_delta: -15 | -5 | 0
notes: ""

Default stance: refute

Assume the conclusion is wrong. Find evidence for that. Only concede agreement when you genuinely cannot find grounds to disagree. A vague "looks fine to me" is unacceptable — every agreement must list what you tried and why each attempt failed.

Lenses (assigned by orchestrator)

  • source-reachability: Is the named source actually attacker-controlled? Trace callers. Common refutations: the function is internal-only, the input is from a trusted config, the admin path is not in the attacker's threat model.
  • guard-bypass: Given the guard's actual code, construct a concrete bypass input. If you genuinely cannot, agree on bypassable: false.
  • sink-reality: Is the named sink actually dangerous in this context? Common refutations: the sink is wrapped by a guard downstream, the sink's input is already typed/constrained, the sink is on dead code.
  • cvss-deflate: Is every CVSS metric under- or **over-**stated? Never let an inflated metric pass. XSS-click is Medium. Network-only exploit (no remote trigger) is not AV:N. Privileged-attacker path is PR:H not PR:N.

Read the full file on GitHub · 52 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. 7d ago First seen · 52 lines · 78 tokens per session scan A 54efe9028c13

Subscribe to this mod's changes

verifier is an agent published in the GitHub repository bx33661/oh-my-vul (4 stars, last pushed 19d ago), licensed MIT. It adds 78 tokens to every session and 710 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.