omv-audit

omv-audit is a skill for Claude Code, Codex from bx33661/oh-my-vul. It costs 88 tokens per session (2,955 once invoked), scanned A, original, MIT.

A security-review workflow for investigating a suspected vulnerability recorded in an Evidence.v1 file. It uses public source code and local analysis to confirm the issue or explain why it cannot be confirmed.

In plain words
What is it for?
Use it to audit candidate vulnerabilities, fill evidence fields, assess CVSS severity, and prepare findings for a security report without contacting live services.
Why use it?
It turns an initial security finding into a structured, verifiable result with source locations, reproduction steps, and risk details.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: reads .claude/ paths; mentions subagents; mentions Claude Code.

Good fit Use it to audit candidate vulnerabilities, fill evidence fields, assess CVSS severity, and prepare findings for a security report without contacting live services.

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Install with agentmods
npx agentmods add skills/bx33661/oh-my-vul/omv-audit
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 bx33661/oh-my-vul --skill omv-audit
Clone the repo
git clone --depth 1 https://github.com/bx33661/oh-my-vul

Made for: Claude Code, Codex.

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 omv-audit

README.md
[![agentmods](https://agentmods.dev/badge/skills/bx33661/oh-my-vul/omv-audit/github.svg)](https://agentmods.dev/skills/bx33661/oh-my-vul/omv-audit)
Your own site
<a href="https://agentmods.dev/skills/bx33661/oh-my-vul/omv-audit"><img src="https://agentmods.dev/badge/skills/bx33661/oh-my-vul/omv-audit/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 omv-audit

Your own site · 80×15
<a href="https://agentmods.dev/skills/bx33661/oh-my-vul/omv-audit"><img src="https://agentmods.dev/badge/skills/bx33661/oh-my-vul/omv-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 88 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,955 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 $0.00088 $0.02955
Opus 5 $0.00044 $0.01477
Sonnet 5 $0.00018 $0.00591
Haiku 4.5 $0.00009 $0.00296

Measured 11d ago against content hash 40dec3d234be, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

omv-audit 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 11d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/check_output.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/omv-audit/SKILL.md · 177 lines

How it starts

The opening of the file, as written. The whole thing — 177 lines — stays where its author put it; the contents beside it link to each section on GitHub.

omv-audit

深度审计一个 candidate 漏洞发现,填充 Evidence.v1 文件,为 /omv-report 做好准备。

Stay in passive research mode: read public source code only. Do not send requests to live services, do not auto-execute PoC code. Local analysis, static reasoning, and local test descriptions are allowed.

Invocation

/omv-audit <id> [--force]
  • <id> 对应 .omv/findings/<id>.yaml 文件
  • --force 允许重新审计已为 confirmed/blocked 的文件

Reference Loading

按需加载,不要一次性全读:

  • 审计方法论与置信度框架:references/audit-playbook.md
  • CVSS v3.1 度量决策表:references/shared/cvss-builder.md
  • 14 个生态的 PatternPack manifest 位于 references/pattern-packs/,对应 Markdown registry 位于 references/patterns/
  • Evidence.v1 字段定义与 evidence/submission 评分规则:contracts/evidence.v1.yaml
  • ThreatMap.v1 图证据字段:contracts/threat-map.v1.yaml
  • Verification.v1 对抗复核 sidecar:contracts/verification.v1.yaml

审计目标

读取 .omv/findings/<id>.yaml 后,你的目标是将以下字段填写为具体、可验证的值(非 unknown):

必填(confirmed 所需)

  • versions.tested — 实际测试的版本号
  • evidence.source — 攻击者可控的输入入口(含 file:line)
  • evidence.sink — 危险操作(含 file:line)
  • evidence.guard — 缺失或可绕过的防御(含 file:line 或"不存在"的说明)
  • evidence.reproducer — 本地复现步骤描述
  • evidence.observed_result — 本地运行后实际观测到的结果(若 passive 模式无法在本地执行,保留 unknown,在 provenance.unverified_fields 中列出,交由 /omv-repro 完成)
  • cvss.vector / cvss.score / cvss.severity
  • dedup.* — NVD/GHSA/生态系统数据库检索结果
  • verdict.* — 当前可利用性判断(proven|plausible|blocked|disproven)、置信度和原因

如何达到目标,由你自主决定。 根据 finding 的实际情况——漏洞类别、已有线索、代码结构——自主选择切入点、阅读哪些文件、花多少精力在每个环节。参考 references/audit-playbook.md 获取思维框架,但不要把它当作执行脚本。

如果 finding 属于任一受支持生态,先加载 references/pattern-packs/ 下对应 JSON,再按需加载 references/patterns/ 下对应 Markdown registry,用其中的 source pattern、sink signature、expected guard、evidence criteria、false-positive checks 和 CWE 映射辅助判断。Pattern registry 是方法论,不是真实漏洞案例库;不要加载无关生态 registry。

当证据链足够清楚时,生成可选 ThreatMap.v1 sidecar,记录 source → transform → sink 的 dataflow 路径:

omv threat-map init <id>

这会在 .omv/threatmaps/<id>.yaml 生成骨架(finding_idpackage 块已从 finding 填好,paths: [] 留待填写)。然后在每个已确认的 source → sink 路径下补一条 paths[] 条目:source(type/location/description)、transforms[](中间每一步:parse/decode/normalize/validate/authorize)、sinkguard(present/bypassable)、confidence。Schema 见 contracts/threat-map.v1.yaml。ThreatMap 是 Evidence.v1 的补充,不替代 evidence.source / evidence.sink / evidence.guard 摘要字段;sidecar 不修改父 Evidence.v1 文件。填写后运行 omv threat-map validate <id>

Read the full file on GitHub · 177 lines

Files

What ships with it

43 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 11d ago First seen · 177 lines · 88 tokens per session scan A 40dec3d234be

Subscribe to this mod's changes

omv-audit is a skill published in the GitHub repository bx33661/oh-my-vul (4 stars, last pushed 22d ago), licensed MIT. It adds 88 tokens to every session and 2,955 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.

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