Agent skill

Semgrep Triage

by deonmenezes in deonmenezes/mantishack

Run semgrep via the mantissemgrep MCP server and triage results into the candidate/confirmed/rejected lifecycle

Apache-2.0Auto-check passedSecurity

Install Semgrep Triage

skills CLI
$ npx skills add deonmenezes/mantishack --skill semgrep-triage -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install deonmenezes/mantishack semgrep-triage --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/deonmenezes/mantishack.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.codex/skills/semgrep-triage .claude/skills/semgrep-triage && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
semgrep-triage
GitHub stars
504
Token cost
~312 tokens
SKILL.md length
144 words
Files
1
Skills in repo
11
Repo updated
First seen
Licence
Apache-2.0

At a glance

Run semgrep via the mantissemgrep MCP server and triage results into the candidate/confirmed/rejected lifecycle

  • Tasks that involve Static analysis and SAST
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Semgrep Triage is an agent skill from deonmenezes/mantishack. Run semgrep via the mantissemgrep MCP server and triage results into the candidate/confirmed/rejected lifecycle

Its SKILL.md is about 310 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Security, covering Static analysis and SAST. It works with Semgrep and Model Context Protocol. The licence is Apache-2.0.

When your agent uses it

  • Tasks that involve Static analysis and SAST

Example prompts

  • “/semgrep-triage”

What it can do on your machine

Read from SKILL.md and the folder at commit c3a2e68. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Semgrep Triage loads about 312 tokens when it runs. Until then it costs about 32 tokens; SKILL.md has 144 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~32
When it runs · the whole SKILL.md, loaded when a task matches
~312

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from deonmenezes/mantishack at commit c3a2e68, republished under its Apache-2.0 licence (© deonmenezes). 144 words, ~312 tokens.

Download SKILL.mdSave it as .claude/skills/semgrep-triage/SKILL.md (or your agent's skills folder).
name
semgrep-triage
description
Run semgrep via the mantis_semgrep MCP server and triage results into the candidate/confirmed/rejected lifecycle

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 config to "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 own ERROR/WARNING/INFO labels 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-analysis skill for the reachability tools) before you claim a confirmed finding.
  • If semgrep reports available: false, tell the user it isn't installed rather than silently skipping SAST coverage.

© deonmenezes, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .codex/skills/semgrep-triage of deonmenezes/mantishack.

Open the folder on GitHubat commit c3a2e68

Compare with similar skills

Semgrep Triage next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Semgrep Triage compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Semgrep Triage this skilldeonmenezes/mantishack504—~312Automated safety check: PassApache-2.0
Evm Audit Flowmtarcure/claude-vibe-squad164—~1.5kAutomated safety check: PassMIT
Kedro Security Reviewkedro-org/kedro11k—~3.3kAutomated safety check: PassCustom licence
Secknowledge SkillPa55w0rd/secknowledge-skill424—~2.7kAutomated safety check: PassNone
Semgrep Security Scantrailofbits/skills7.4k—~3.7kAutomated safety check: NotesCC-BY-SA-4.0
Kedro Plugins Security Reviewkedro-org/kedro-plugins119—~3.1kAutomated safety check: PassApache-2.0

Similar skills

  • Evm Audit Flow

    mtarcure/claude-vibe-squad

    A skill your agent uses when you have a Foundry or Hardhat repository of Solidity or Vyper contracts and want the end-to-end EVM review workflow on native CLIs — a slither static pass, semgrep taint…

    164 GitHub stars~1.5k tokensUpdated 19 days ago
    SecurityAuto-check passed
  • Kedro Security Review

    kedro-org/kedro

    Run a Kedro security scan on the full codebase or just a pull request.

    11k GitHub stars~3.3k tokensUpdated yesterday
    SecurityAuto-check passed
  • Secknowledge Skill

    Pa55w0rd/secknowledge-skill

    Web+AI 安全测试知识库。融合 WooYun 88,636 案例 + 先知 L1-L4 方法论 + GAARM 173 风险 + OWASP Top 10 (LLM/ASI/WSTG)。

    424 GitHub stars~2.7k tokensUpdated 3 mo ago
    SecurityAuto-check passed
  • Semgrep Security Scan

    trailofbits/skills

    Official

    Detects languages, proposes rulesets for approval, then runs the approved Semgrep scan across a codebase and merges the output into one SARIF file.

    7.4k GitHub stars~3.7k tokensUpdated 2 days ago
    SecurityAuto-check: notes
  • Kedro Plugins Security Review

    kedro-org/kedro-plugins

    Run a security scan on the kedro-plugins codebase or a pull request.

    119 GitHub stars~3.1k tokensUpdated yesterday
    SecurityAuto-check passed
  • Sarif Parsing

    trailofbits/skills

    Official

    Parses and processes SARIF files from static analysis tools like CodeQL, Semgrep, or other scanners.

    7.4k GitHub starsUsed in 3 repos~4.4k tokens
    SecurityAuto-check: notes

More from deonmenezes/mantishack

All 11 skills in this repo
  • Codex Issue Digest

    deonmenezes/mantishack

    Run a GitHub issue digest for openai/codex by feature-area labels, all areas, and configurable time windows.

    504 GitHub stars~2.3k tokensUpdated 6 days ago
    Auto-check passed
  • Codex Bug

    deonmenezes/mantishack

    Diagnose GitHub bug reports in openai/codex. An agent skill from deonmenezes/mantishack.

    504 GitHub stars~643 tokensUpdated 6 days ago
    Auto-check passed
  • Detection Breadth

    deonmenezes/mantishack

    When and how to reach for the companion detectors -- bandit (Python SAST) and trivy (deps + secrets + IaC misconfig) -- alongside the core semgrep/CodeQL/osv/trufflehog toolchain

    504 GitHub stars~510 tokensUpdated 6 days ago
    Auto-check passed
  • HTTP Evidence

    deonmenezes/mantishack

    Turn a captured HTTP request/response into a bounded, redacted evidence pack with a stable request-ref using the mantishttpaudit MCP server, instead of pasting raw traffic into a finding

    504 GitHub stars~455 tokensUpdated 6 days ago
    Auto-check passed
  • Program Analysis

    deonmenezes/mantishack

    Use astgrepscan, sourcesinkscan, and smtcheckreachability (mantisprogramanalysis MCP server) to move a candidate toward a proven-reachable finding

    504 GitHub stars~551 tokensUpdated 6 days ago
    Auto-check passed
  • Canary Tripwire Response

    deonmenezes/mantishack

    What to do if a mantiscanary decoy tool ever shows up as tempting or gets called -- treat it as a security incident, not a normal tool result

    504 GitHub stars~376 tokensUpdated 6 days ago
    Auto-check passed

Categories

Questions about Semgrep Triage

What does Semgrep Triage do?

Run semgrep via the mantissemgrep MCP server and triage results into the candidate/confirmed/rejected lifecycle. Semgrep Triage is an agent skill from deonmenezes/mantishack.

When should I use Semgrep Triage?

Semgrep Triage fits situations like: tasks that involve Static analysis and SAST.

How do I install Semgrep Triage in Claude Code?

Run `npx skills add deonmenezes/mantishack --skill semgrep-triage -a claude-code`. Or copy the skill folder (.codex/skills/semgrep-triage in deonmenezes/mantishack) into .claude/skills/semgrep-triage in your project. Claude Code loads it when a task matches its description.

How do I install Semgrep Triage in Codex?

Run `npx skills add deonmenezes/mantishack --skill semgrep-triage -a codex`. Or copy the skill folder (.codex/skills/semgrep-triage in deonmenezes/mantishack) into .agents/skills/semgrep-triage in your project. Codex loads it when a task matches its description.

Can I use Semgrep Triage in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add deonmenezes/mantishack --skill semgrep-triage -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/semgrep-triage, .gemini/skills/semgrep-triage, .github/skills/semgrep-triage and .opencode/skills/semgrep-triage in your project.

What does Semgrep Triage need to run?

SKILL.md names no scripts, command-line tools or credentials: Semgrep Triage is instructions for the agent only.

Does Semgrep Triage access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Semgrep Triage safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Semgrep Triage use?

Semgrep Triage is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Semgrep Triage use?

About 312 tokens (SKILL.md is roughly 1.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Semgrep Triage?

Skills that share tags, products or a category with Semgrep Triage: Evm Audit Flow (mtarcure/claude-vibe-squad, 164 stars), Kedro Security Review (kedro-org/kedro, 11k stars), Secknowledge Skill (Pa55w0rd/secknowledge-skill, 424 stars) and Semgrep Security Scan (trailofbits/skills, 7.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Semgrep Triage?

deonmenezes (a GitHub user) maintains it in deonmenezes/mantishack, which has 504 GitHub stars. The repository holds 11 skills in this directory. The repository was last updated on October 3, 2026.

Source: deonmenezes/mantishack on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.