cde-dotnetcc: Skill for Claude Code

.claude/skills/dotnet-performance-review/SKILL.md

dotnet-performance-review is a skill for Claude Code from atherio-danp/cde-dotnetcc. It costs 64 tokens per session (1,101 once invoked), scanned A, original, no licence file.

A read-only review guide for finding common performance problems in .NET and C# code. It checks asynchronous code, memory and strings, collections and LINQ, regular expressions, serialization, and input/output.

In plain words
What is it for?
Use it to audit frequently run code, investigate allocation-heavy sections, or find optimization opportunities in the API.
Why use it?
It makes possible slowdowns and unnecessary memory use visible without changing the code being reviewed.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

This is atherio-danp/cde-dotnetcc's own configuration. It tells Claude Code how to work on cde-dotnetcc itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything cde-dotnetcc configures →

Reuse

Borrowing it

Nothing to install: this file belongs to atherio-danp/cde-dotnetcc. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/atherio-danp/cde-dotnetcc/main/.claude/skills/dotnet-performance-review/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/atherio-danp/cde-dotnetcc

Made for: Claude Code.

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 dotnet-performance-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/atherio-danp/cde-dotnetcc/dotnet-performance-review/github.svg)](https://agentmods.dev/skills/atherio-danp/cde-dotnetcc/dotnet-performance-review)
Your own site
<a href="https://agentmods.dev/skills/atherio-danp/cde-dotnetcc/dotnet-performance-review"><img src="https://agentmods.dev/badge/skills/atherio-danp/cde-dotnetcc/dotnet-performance-review/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 dotnet-performance-review

Your own site · 80×15
<a href="https://agentmods.dev/skills/atherio-danp/cde-dotnetcc/dotnet-performance-review"><img src="https://agentmods.dev/badge/skills/atherio-danp/cde-dotnetcc/dotnet-performance-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 64 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,101 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 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 5.1 $0.00064 $0.01101
Opus 5 $0.00032 $0.00550
Sonnet 5 $0.00013 $0.00220
Haiku 4.5 $0.00006 $0.00110

Measured 9d ago against content hash 1f3b95c7dd96, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

dotnet-performance-review 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 9d 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.

.claude/skills/dotnet-performance-review/SKILL.md · 48 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. 9d ago First seen · 48 lines · 64 tokens per session scan A 1f3b95c7dd96

Subscribe to this mod's changes

dotnet-performance-review is a skill published in the GitHub repository atherio-danp/cde-dotnetcc (109 stars, last pushed 1mo ago), with no licence file. It adds 64 tokens to every session and 1,101 once invoked, about $0.0003 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 2026-08-30.

Related

Other skills, from other repositories

analyzing-dotnet-performance

Scans .NET code for 50 performance anti-patterns across async, memory, strings, collections, LINQ, regex, serialization, and I/O with tiered severity classification. Use when analyzing .NET code for optimization opportunities, reviewing hot paths, or auditing allocation-heavy patterns.

dotnet/skills · 64 tokens

code-review-csharp

Perform structured code reviews of C# source code covering naming conventions, performance, security, readability, and .NET best practices. Trigger phrases include "review this C# code", "check my C# for best practices", "analyze this C# class", "find issues in my C# code".

pnp/copilot-prompts · 66 tokens

de-sloppify

Systematic code cleanup pipeline for .NET projects. Runs 7 ordered steps: formatting, unused usings, analyzer warnings, dead code removal, TODO resolution, sealed class audit, and CancellationToken propagation. Each step is verified independently with tests between phases. Load this skill when: "clean up"…

codewithmukesh/dotnet-claude-kit · 115 tokens

resharper-clt

Use the free official JetBrains ReSharper Command Line Tools for .NET repositories. USE FOR: jb inspectcode; jb cleanupcode; stronger C# inspections, cleanup profiles, and CI-friendly JetBrains analysis. DO NOT USE FOR: replacing tests with inspection output; ad-hoc formatting-only work when the repo intentionally…

managedcode/dotnet-skills · 107 tokens

roslynator

Use the open-source free Roslynator analyzer packages and optional CLI for .NET. USE FOR: Roslynator.Analyzers setup; Roslynator CLI checks or cleanup; C# linting, static analysis, and code-fix automation. DO NOT USE FOR: overlapping analyzer packs with no consolidation plan; formatting-only work owned by another…

managedcode/dotnet-skills · 107 tokens

stylecop-analyzers

Use the open-source free StyleCop.Analyzers package for naming, layout, documentation, and style rules in .NET projects. Use when a repo wants stricter style conventions than the SDK analyzers alone provide. USE FOR: the repo wants StyleCop.Analyzers; naming, layout, or documentation style needs stronger enforcement…

managedcode/dotnet-skills · 142 tokens