mantishack: Skill for Codex

.codex/skills/osv-dependency-scan/SKILL.md

osv-dependency-scan is a skill for Codex from deonmenezes/mantishack. It costs 31 tokens per session (259 once invoked), scanned A, original, Apache-2.0.

A dependency scanner that checks project manifests and lockfiles against the OSV database, a public database of known software vulnerabilities.

In plain words
What is it for?
It helps find vulnerable direct and transitive dependencies, record their advisory IDs, and check whether the affected code is actually called.
Why use it?
It identifies packages with published security advisories, while making clear that a vulnerable package may not be used by the application.

Skill for Codex

Written for Codex: installed under .codex/.

This is deonmenezes/mantishack's own configuration. It tells Codex how to work on mantishack itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mantishack configures →

Reuse

Borrowing it

Nothing to install: this file belongs to deonmenezes/mantishack. 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/deonmenezes/mantishack/main/.codex/skills/osv-dependency-scan/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/deonmenezes/mantishack

Made for: 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 osv-dependency-scan

README.md
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agentmods 80×15 button for osv-dependency-scan

Your own site · 80×15
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Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 259 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00031 $0.00259
Opus 5 $0.00015 $0.00130
Sonnet 5 $0.00006 $0.00052
Haiku 4.5 $0.00003 $0.00026

Measured 9d ago against content hash b3246f8c5c35, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

osv-dependency-scan 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 9d 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.

.codex/skills/osv-dependency-scan/SKILL.md · 12 lines

What it actually says

Use osv_scan({ path }) (mantis_osv_scanner MCP server) for the Detect stage's SCA coverage: known-vulnerable dependencies matched against the OSV database, recursively across manifests/lockfiles under path.

  • Each result is a candidate keyed by package + version + advisory id (CVE/GHSA). A vulnerable dependency being present does not mean the vulnerable code path is reachable or exercised by the application -- that's a separate reachability question.
  • Before validating, check whether the vulnerable function/API of the dependency is actually called anywhere in the target codebase (grep/ast-grep for the relevant import or call). If it's an unused transitive dependency, note that in the rejection reason rather than dropping the finding silently.
  • Prefer offline: true only when the environment has no network access to query the live OSV database; note in your report that offline results may be stale.
  • If osv-scanner reports available: false, say so explicitly -- don't claim SCA coverage you didn't actually get.
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. 9d ago First seen · 12 lines · 31 tokens per session scan A b3246f8c5c35

Subscribe to this mod's changes

osv-dependency-scan is a skill published in the GitHub repository deonmenezes/mantishack (495 stars, last pushed 28d ago), licensed Apache-2.0. It adds 31 tokens to every session and 259 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 2026-08-30.

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