semgrep-scanner

semgrep-scanner is an agent for Claude Code from FlorianBruniaux/starmapper. It costs 40 tokens per session (709 once invoked), scanned C, original, no licence file.

A scanning worker that runs Semgrep, a tool that checks source code against security rules, for one detected programming-language category. It produces SARIF scan results.

In plain words
What is it for?
Running Semgrep command-line scans for a selected language and generating SARIF results.
Why use it?
Large scans can be split by language so they can run as parallel workers. This provides separate scanner output for the wider Semgrep process.

Agent for Claude Code

Part of the static-analysis plugin — 3 skills, 1 agent shipped together

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.

agentmods
npx agentmods add agents/florianbruniaux/starmapper/semgrep-scanner
Clone the repo
git clone --depth 1 https://github.com/FlorianBruniaux/starmapper

Made for: Claude Code.

Or install static-analysis, the plugin that ships this one along with the rest of its 3 skills, 1 agent.

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 semgrep-scanner

README.md
[![agentmods](https://agentmods.dev/badge/agents/florianbruniaux/starmapper/semgrep-scanner.svg)](https://agentmods.dev/agents/florianbruniaux/starmapper/semgrep-scanner)
Your own site
<a href="https://agentmods.dev/agents/florianbruniaux/starmapper/semgrep-scanner"><img src="https://agentmods.dev/badge/agents/florianbruniaux/starmapper/semgrep-scanner.svg" alt="Measured on agentmods" height="20"></a>
Per session 40 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 709 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 1 finding. Scan, not verified.
Origin unknown 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 $0.00040 $0.00709
Opus 5 $0.00020 $0.00354
Sonnet 5 $0.00008 $0.00142
Haiku 4.5 $0.00004 $0.00071

Measured 4d ago against content hash 26d412799ad8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade C, and why

semgrep-scanner scanned grade C with 1 finding 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 4d 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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

`[ -n "[OUTPUT_DIR]" ] && rm -rf [OUTPUT_DIR]/repos`
.claude/plugins/static-analysis/agents/semgrep-scanner.md · 91 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 4d ago First seen · 91 lines · 40 tokens per session scan C 26d412799ad8

Subscribe to this mod's changes

semgrep-scanner is an agent published in the GitHub repository FlorianBruniaux/starmapper (83 stars, last pushed 2d ago), with no licence file. It adds 40 tokens to every session and 709 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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