A security analysis system for finding potentially unsafe code patterns in .NET projects. CodeQL uses queries to examine source code and can be connected to GitHub code scanning or run from the command line.

Use it to configure CodeQL queries, command-line analysis, or GitHub Actions security checks for .NET code.

It helps identify security problems during development instead of relying only on manual review. Its setup depends on whether the repository is open source or private.

codeql — Skill for Claude Code and Codex by managedcode

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.

Any agent

npx skills add managedcode/dotnet-skills --skill codeql

Clone the repo

git clone --depth 1 https://github.com/managedcode/dotnet-skills

Made for: Claude Code, 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/managedcode/dotnet-skills/codeql/github.svg)](https://agentmods.dev/skills/managedcode/dotnet-skills/codeql)

Your own site

<a href="https://agentmods.dev/skills/managedcode/dotnet-skills/codeql"><img src="https://agentmods.dev/badge/skills/managedcode/dotnet-skills/codeql/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/managedcode/dotnet-skills/codeql"><img src="https://agentmods.dev/badge/skills/managedcode/dotnet-skills/codeql.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 122 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 969 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.

Model	Per session	Once invoked
Fable 5.1	$0.00122	$0.00969
Opus 5	$0.00061	$0.00485
Sonnet 5	$0.00024	$0.00194
Haiku 4.5	$0.00012	$0.00097

Measured 6d ago against content hash 0a6315d684d8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

codeql 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 6d 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.

Origin

Copies of this mod

3 near-identical copies found in the catalogue:

dotnet-codeql — 95% identical, 12 lines differ
mcaf-dotnet-codeql — 89% identical, 10 lines differ
mcaf-dotnet-codeql — 89% identical, 10 lines differ

catalog/Tools/CodeQL/skills/codeql/SKILL.md · 103 lines

How it starts

The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CodeQL for .NET

Trigger On

the repo uses or wants CodeQL for .NET security analysis
GitHub code scanning is part of the CI plan

Value

produce a concrete project delta: code, docs, config, tests, CI, or review artifact
reduce ambiguity through explicit planning, verification, and final validation skills
leave reusable project context so future tasks are faster and safer

Do Not Use For

teams that need a tool with no private-repo licensing caveat

Inputs

the nearest AGENTS.md
hosting model: open-source repo, private repo, or manual CLI workflow
current GitHub Actions workflow

Quick Start

Read the nearest AGENTS.md and confirm scope and constraints.
Run this skill's Workflow through the Ralph Loop until outcomes are acceptable.
Return the Required Result Format with concrete artifacts and verification evidence.

Workflow

Treat CodeQL as a security-analysis tool, not as a style checker.
Make the licensing and hosting model explicit before proposing it as the default gate.
Prefer manual build mode for compiled .NET projects when precision matters.

Bootstrap When Missing

If CodeQL is not configured yet:

Detect current state:
- rg -n "codeql-action|security-events|CodeQL" .github/workflows
- command -v codeql
Prefer CI-first setup for repository scanning using github/codeql-action/init and github/codeql-action/analyze.
Configure explicit .NET build mode in workflow (manual when precision matters).
Add local CLI usage only when the task requires local query work.
Run the workflow or local analyze path and return status: configured or status: improved.
If licensing or hosting constraints reject CodeQL for this repo, return status: not_applicable with caveat documented.

Deliver

explicit CodeQL setup or an explicit rejection with caveat documented
reproducible CI or local commands for running CodeQL in this repo

Validate

the chosen CodeQL path is allowed for the repo type
build mode is documented and reproducible

Read the full file on GitHub · 103 lines

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

6d ago First seen · 103 lines · 122 tokens per session scan A 0a6315d684d8

Subscribe to this mod's changes

codeql is a skill published in the GitHub repository managedcode/dotnet-skills (477 stars, last pushed 4d ago), licensed MIT. It adds 122 tokens to every session and 969 once invoked, about $0.0006 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 2026-09-03.

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