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roslynator

roslynator is a skill for Claude Code, Codex from managedcode/dotnet-skills. It costs 107 tokens per session (1,236 once invoked), scanned A, original, MIT.

A collection of Roslyn-based analyzers and an optional command-line tool for checking and cleaning up C# code. Roslyn is the .NET compiler platform used to inspect source code.

In plain words
What is it for?
Use it to add build-time C# analysis, run checks from the command line, apply supported fixes, find unused code, or format files.
Why use it?
It can enforce additional code-quality rules and identify cleanup or unused-code work beyond the basic checks supplied by the .NET SDK.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions AGENTS.md.

not rated 477repo 2d ago A scan SkillSpector: pass 107 tokens original MIT

Good fit Use it to add build-time C# analysis, run checks from the command line, apply supported fixes, find unused code, or format files.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/managedcode/dotnet-skills/roslynator
View source ↗ managedcode/dotnet-skills skills.managed-code.com
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 roslynator
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.

agentmods badge for roslynator

README.md
[![agentmods](https://agentmods.dev/badge/skills/managedcode/dotnet-skills/roslynator.svg)](https://agentmods.dev/skills/managedcode/dotnet-skills/roslynator)
Your own site
<a href="https://agentmods.dev/skills/managedcode/dotnet-skills/roslynator"><img src="https://agentmods.dev/badge/skills/managedcode/dotnet-skills/roslynator.svg" alt="Measured on agentmods" height="20"></a>
Per session 107 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,236 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00107 $0.01236
Opus 5 $0.00053 $0.00618
Sonnet 5 $0.00021 $0.00247
Haiku 4.5 $0.00011 $0.00124

Measured 3d ago against content hash 9efe3fcc0d0d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

roslynator 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 3d 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.

catalog/Tools/Roslynator/skills/roslynator/SKILL.md · 125 lines

How it starts

The opening of the file, as written. The whole thing — 125 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Roslynator

Trigger On

  • the repo uses or wants Roslynator.Analyzers
  • the team wants Roslynator CLI or extra Roslyn-based rules
  • the user asks about C# linting, static analysis, code cleanup, or unused code

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

  • repos that already have overlapping analyzer packs with no consolidation plan
  • formatting-only work when the repo already standardized on dotnet format or CSharpier

Inputs

  • the nearest AGENTS.md
  • current analyzer packages
  • .editorconfig

Quick Start

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

Workflow

  1. Prefer the NuGet analyzer packages for build-enforced checks.
  2. Use the CLI when the repo needs one of these flows explicitly:
    • analyze
    • fix
    • find-unused
    • format
  3. Build first when Roslynator needs compiled context.
  4. Configure rule severity and Roslynator behavior in .editorconfig.
  5. Avoid duplicating the same rules across multiple analyzer packs without a severity plan.
  6. Treat CLI auto-fix as a controlled change:
    • run it on a bounded target first
    • rebuild
    • rerun tests

Bootstrap When Missing

If Roslynator is not configured yet:

  1. Detect current state:
    • rg -n "Roslynator\\.Analyzers" -g '*.csproj' .
    • rg --files -g '.config/dotnet-tools.json'
    • dotnet tool list --local
    • dotnet tool list --global
    • command -v roslynator
  2. Choose the install path deliberately:
    • analyzer package: dotnet add PROJECT.csproj package Roslynator.Analyzers
    • optional CLI: dotnet new tool-manifest (if missing) and dotnet tool install roslynator.dotnet.cli
  3. Configure ownership in root .editorconfig so Roslynator does not fight SDK analyzers, StyleCop, or Meziantou.
  4. If the CLI is adopted, add exact commands in AGENTS.md and CI, such as:
    • dotnet tool run roslynator analyze SOLUTION_OR_PROJECT
    • dotnet tool run roslynator fix SOLUTION_OR_PROJECT
  5. Run dotnet build SOLUTION_OR_PROJECT and the selected Roslynator command, then return status: configured or status: improved.
  6. If the repo wants only the current analyzer baseline and no Roslynator-specific CLI workflow, return status: not_applicable.

Read the full file on GitHub · 125 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.

  1. 3d ago First seen · 125 lines · 107 tokens per session scan A 9efe3fcc0d0d

Subscribe to this mod's changes

roslynator is a skill published in the GitHub repository managedcode/dotnet-skills (477 stars, last pushed 2d ago), licensed MIT. It adds 107 tokens to every session and 1,236 once invoked, about $0.0005 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.

C# and .NETClaude CodeCode reviewLanguagescodexcopilotdotnetdotnet-skillsskills
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