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.
curl -O https://raw.githubusercontent.com/deonmenezes/mantishack/main/.codex/skills/semgrep-triage/SKILL.mdgit clone --depth 1 https://github.com/deonmenezes/mantishackWrote 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.
[](https://agentmods.dev/skills/deonmenezes/mantishack/semgrep-triage)<a href="https://agentmods.dev/skills/deonmenezes/mantishack/semgrep-triage"><img src="https://agentmods.dev/badge/skills/deonmenezes/mantishack/semgrep-triage/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.
<a href="https://agentmods.dev/skills/deonmenezes/mantishack/semgrep-triage"><img src="https://agentmods.dev/badge/skills/deonmenezes/mantishack/semgrep-triage.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00029 | $0.00282 |
| Opus 5 | $0.00015 | $0.00141 |
| Sonnet 5 | $0.00006 | $0.00056 |
| Haiku 4.5 | $0.00003 | $0.00028 |
Grade A, and why
semgrep-triage 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.
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.
What it actually says
Use the semgrep_scan tool (mantis_semgrep MCP server) for the Detect stage of the Mantis pipeline: high-recall SAST over a file or directory.
- Default
configto"auto". Prefer a narrower ruleset (e.g."p/owasp-top-ten","p/secrets") when you already know the vulnerability class you're hunting. - Every result is a
candidate, not a finding. Do not report severity from semgrep's ownERROR/WARNING/INFOlabels as final severity -- those describe rule confidence, not demonstrated impact. - For each candidate: trace the exact source-to-sink path in the surrounding code before deciding it's worth validating further. If the sink is unreachable from attacker-controlled input (auth-gated, admin-only, framework-sanitized), reject it and cite the specific roadblock -- never "seems safe."
- Reachable candidates move to attacker-simulation validation (see
program-analysisskill for the reachability tools) before you claim a confirmed finding. - If
semgrepreportsavailable: false, tell the user it isn't installed rather than silently skipping SAST coverage.
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.
- 11d ago First seen · 13 lines · 29 tokens per session scan A 4e32309b4d77
semgrep-triage is a skill published in the GitHub repository deonmenezes/mantishack (495 stars, last pushed 29d ago), licensed Apache-2.0. It adds 29 tokens to every session and 282 once invoked, about $0.0001 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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