cg-scan

cg-scan is a skill for Claude Code from Freespirits/claudeguard-il. It costs 73 tokens per session (3,945 once invoked), scanned A, original, MIT.

A read-only static security scan for a code project. It examines the project’s structure and produces security findings without using the network or credentials.

In plain words
What is it for?
Use it with /cg-scan to scan a repository, optionally focus the reviewer checks on a domain, and receive findings with evidence and confidence levels.
Why use it?
It gives you a repeatable first check for security issues while avoiding changes to the codebase or access to live systems.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the claudeguard-il plugin — 7 skills, 6 agents shipped together

Good fit Use it with /cg-scan to scan a repository, optionally focus the reviewer checks on a domain, and receive findings with evidence and confidence levels.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add Freespirits/claudeguard-il
Claude Code
/plugin install claudeguard-il

Made for: Claude Code.

Or install claudeguard-il, the plugin that ships this one along with the rest of its 7 skills, 6 agents.

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 cg-scan

README.md
[![agentmods](https://agentmods.dev/badge/skills/freespirits/claudeguard-il/cg-scan/github.svg)](https://agentmods.dev/skills/freespirits/claudeguard-il/cg-scan)
Your own site
<a href="https://agentmods.dev/skills/freespirits/claudeguard-il/cg-scan"><img src="https://agentmods.dev/badge/skills/freespirits/claudeguard-il/cg-scan/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 cg-scan

Your own site · 80×15
<a href="https://agentmods.dev/skills/freespirits/claudeguard-il/cg-scan"><img src="https://agentmods.dev/badge/skills/freespirits/claudeguard-il/cg-scan.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 73 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,945 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 $0.00073 $0.03945
Opus 5 $0.00036 $0.01972
Sonnet 5 $0.00015 $0.00789
Haiku 4.5 $0.00007 $0.00394

Measured 8d ago against content hash 74850f804ed5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

cg-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 8d 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.

plugin/skills/cg-scan/SKILL.md · 237 lines

How it starts

The opening of the file, as written. The whole thing — 237 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/cg-scan — static security scan (Tier 0)

Run a safe, read-only static audit. No network, no credentials. This is the default entry point.

Arguments: $ARGUMENTS — optional path to scan (default: repo root) and an optional --domain filter. --domain narrows which auditors you dispatch and which catalogs you read; it does not narrow the grader, which always grades the whole model so coverage still adds up.

The pipeline

Engine → Facts → Grader → Findings → Auditors add reviewer findings → Report
Stage Who What it is allowed to do
Engine scripts/project_model.mjs Emits Facts: routes, tables, env vars, LLM sites, clients, the client/server boundary. Has no opinion about danger.
Grader scripts/grader.mjs The single authority on severity and confidence. Turns Facts into Findings and builds the coverage ledger.
Auditors web-auditor, ai-auditor, mobile-auditor, infra-auditor Add findings with provenance: 'reviewer' and evidence: 'judgement' — capped at confidence likely, never confirmed.
Verifier finding-verifier Refutes only — removes a finding by naming the fact that disproves it. It never edits a confidence, never lowers a severity, never adds findings.
Report you Render what the grader produced.

You do not grade. Not while reading a file, not while writing the report, not "just this once because it looks worse than P2". Severity being reproducible — the same repo grading the same way every time — is the entire public claim of this tool. The moment you re-derive it from a check document, two runs of /cg-scan on one repo disagree, and every conversation about a finding turns into a conversation about the model.

Concretely:

  • Severity and confidence come from grader.mjs and nowhere else. Confidence is a pure function of evidence strength (definitiveconfirmed, stronglikely, weakneeds-review, judgementlikely). Never hand-set it, never "upgrade" one.
  • Auditors add judgement findings, which is the work no rule can do — auth that is present and does not enforce, ownership filtered on the wrong column, a workflow step that can be skipped. They are capped at likely because no amount of reading is a proof.
  • You render. Titles, ordering, coverage, both languages.

Read the full file on GitHub · 237 lines

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. 8d ago First seen · 237 lines · 73 tokens per session scan A 74850f804ed5

Subscribe to this mod's changes

cg-scan is a skill published in the GitHub repository Freespirits/claudeguard-il (2 stars, last pushed 1mo ago), licensed MIT. It adds 73 tokens to every session and 3,945 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.

Related

Other skills, from other repositories

systematic-debugging

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.

obra/superpowers · 21 tokens

local-ai-agents

Build local-first AI agents that run entirely on a developer workstation with Microsoft Foundry Local and Qwen function-calling models. Covers Small Language Models (SLMs), the OpenAI-compatible local endpoint, sandboxed local tools, local RAG with Chroma, local MCP servers, hybrid cloud/local routing, and the…

microsoft/ai-agents-for-beginners · 200 tokens

next-cache-components-adoption

Turn on Cache Components in a Next.js app and resolve the blocking routes it surfaces. Use when the user wants to enable, adopt, or migrate to Cache Components, flip the cacheComponents flag, work through a flood of blocking-prerender / instant validation errors, run the cache-components-instant-false codemod, or…

vercel/next.js · 95 tokens

next-cache-components-optimizer

Drive a Next.js route to instant navigation by setting up an agentic loop, under Cache Components / PPR, on initial load (hard navigation) and client-side navigation (soft navigation). Encode the goal as a failing @next/playwright instant() e2e and work it to green, one verified route at a time; the shipped test then…

vercel/next.js · 170 tokens

next-partial-prefetching-adoption

Turn on Partial Prefetching in a Next.js app and work through the insights it surfaces. Use when the user wants to enable or adopt Partial Prefetching, flip the partialPrefetching flag, opt routes in with export const prefetch = 'partial', audit Link prefetch={true} behavior, preserve existing prefetched UI with…

vercel/next.js · 103 tokens

chronicle

Analyze Copilot session history for standup reports, usage tips, session search, and session reindexing. Use when the user asks for a standup, daily summary, usage tips, workflow recommendations, wants to search or find past sessions by keyword/file/PR, wants to reindex their session store, or asks about deleting…

microsoft/vscode · 72 tokens