Agent skill

Dotnet Performance Review

by atherio-danp in atherio-danp/cde-dotnetcc

Scan .NET/C code for performance anti-patterns (async, memory/strings, collections/LINQ, regex, serialization, I/O) with tiered severity, reporting findings without editing.

No licenceAuto-check: notesBusiness, Finance & HR

Install Dotnet Performance Review

skills CLI
$ npx skills add atherio-danp/cde-dotnetcc --skill dotnet-performance-review -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install atherio-danp/cde-dotnetcc dotnet-performance-review --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/atherio-danp/cde-dotnetcc.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/dotnet-performance-review .claude/skills/dotnet-performance-review && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
dotnet-performance-review
GitHub stars
109
Token cost
~1k tokens
SKILL.md length
372 words
Files
1
Skills in repo
13
Repo updated
First seen
Licence
None found

At a glance

Scan .NET/C code for performance anti-patterns (async, memory/strings, collections/LINQ, regex, serialization, I/O) with tiered severity, reporting findings without editing.

  • Works in 4 steps: Signal detection → topics. Scan for… → Scan & confirm with grep (emit a… → Classify: 🔴 Critical… → …
  • Auditing hot paths
  • SKILL.md covers Workflow, Correctness rules (don't… and Our deviation from the…
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Dotnet Performance Review is an agent skill from atherio-danp/cde-dotnetcc. Scan .NET/C code for performance anti-patterns (async, memory/strings, collections/LINQ, regex, serialization, I/O) with tiered severity, reporting findings without editing. Use when auditing hot paths, reviewing allocation-heavy code, or analyzing the API for optimization opportunities.

Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Business, Finance & HR, covering Performance reviews. It works with .NET and C#. The repository describes itself as: Claude Code harness for .NET developers.

When your agent uses it

  • Auditing hot paths
  • Reviewing allocation-heavy code
  • Analyzing the API for optimization opportunities

Example prompts

  • “/dotnet-performance-review”

Requirements

  • Pre-approved tools (allowed-tools): Read, Glob, Grep, Bash, mcp__serena__initial_instructions, mcp__serena__get_symbols_overview, mcp__serena__find_symbol, mcp__serena__find_referencing_symbols, mcp__serena__find_declaration, mcp__serena__find_implementations, mcp__serena__search_for_pattern, mcp__serena__get_diagnostics_for_file, mcp__serena__list_dir, mcp__serena__find_file

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. Signal detection → topics. Scan for signals and select topics: async/await/Task/ValueTask →
  2. Scan & confirm with grep (emit a checklist with exact hit counts; 0 hits is a valid finding)
  3. Classify: 🔴 Critical (deadlock/crash/security/>10×), 🟡 Moderate (2–10× / hot-path best practice),
  4. Report compactly per finding: #### ID. Title (N instances) / Impact / Files as File.cs:L42 /

What it can do on your machine

Read from SKILL.md and the folder at commit c72a3f9. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Glob
    • Grep
    • Bash
    • mcp__serena__initial_instructions
    • mcp__serena__get_symbols_overview
    • mcp__serena__find_symbol
    • mcp__serena__find_referencing_symbols
    • mcp__serena__find_declaration
    • mcp__serena__find_implementations

    …and 4 more on the same allowed-tools line.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Dotnet Performance Review loads about 1k tokens when it runs. Until then it costs about 79 tokens; SKILL.md has 372 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~79
When it runs · the whole SKILL.md, loaded when a task matches
~1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
    allowed-tools: Read, Glob, Grep, Bash, mcp__serena__initial_instructions, mcp__serena__get_symbols_overview, mcp__s

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 372 words (~1,022 tokens).

“A static, read-only anti-pattern scanner for the {{ProductName}} .NET API — it reports, it does not edit. Pairs with the architect-backend review and microbenchmarking (to confirm a fix with evidence). Aligns with our coding-standards.md and async-discipline rules.”

— opening of SKILL.md by atherio-danp
name
dotnet-performance-review
allowed-tools
Read, Glob, Grep, Bash, mcp__serena__initial_instructions, mcp__serena__get_symbols_overview, mcp__serena__find_symbol, mcp__serena__find_referencing_symbols, mcp__serena__find_declaration, mcp__serena__find_implementations, mcp__serena__search_for_pattern, mcp__serena__get_diagnostics_for_file, mcp__serena__list_dir, mcp__serena__find_file

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .claude/skills/dotnet-performance-review of atherio-danp/cde-dotnetcc.

Open the folder on GitHubat commit c72a3f9

Compare with similar skills

Dotnet Performance Review next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

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Dotnet Performance Review this skillatherio-danp/cde-dotnetcc109—~1kAutomated safety check: NotesNone
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Stock Indicators Dotnetfacioquo/stock-indicators-dotnet1.2k—~811Automated safety check: PassApache-2.0
Built In StandardsNethereum/Nethereum2.3k—~2.3kAutomated safety check: PassMIT
KeystoreNethereum/Nethereum2.3k—~561Automated safety check: PassMIT
Smart Sessions And PoliciesNethereum/Nethereum2.3k—~3.9kAutomated safety check: PassMIT

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Works with

Questions about Dotnet Performance Review

What does Dotnet Performance Review do?

Scan .NET/C code for performance anti-patterns (async, memory/strings, collections/LINQ, regex, serialization, I/O) with tiered severity, reporting findings without editing. Dotnet Performance Review is an agent skill from atherio-danp/cde-dotnetcc.NET/C code for performance anti-patterns (async, memory/strings, collections/LINQ, regex, serialization, I/O) with tiered severity, reporting findings without editing.

When should I use Dotnet Performance Review?

Dotnet Performance Review fits situations like: auditing hot paths; reviewing allocation-heavy code; analyzing the API for optimization opportunities.

How do I install Dotnet Performance Review in Claude Code?

Run `npx skills add atherio-danp/cde-dotnetcc --skill dotnet-performance-review -a claude-code`. Or copy the skill folder (.claude/skills/dotnet-performance-review in atherio-danp/cde-dotnetcc) into .claude/skills/dotnet-performance-review in your project. Claude Code loads it when a task matches its description.

How do I install Dotnet Performance Review in Codex?

Run `npx skills add atherio-danp/cde-dotnetcc --skill dotnet-performance-review -a codex`. Or copy the skill folder (.claude/skills/dotnet-performance-review in atherio-danp/cde-dotnetcc) into .agents/skills/dotnet-performance-review in your project. Codex loads it when a task matches its description.

Can I use Dotnet Performance Review in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add atherio-danp/cde-dotnetcc --skill dotnet-performance-review -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/dotnet-performance-review, .gemini/skills/dotnet-performance-review, .github/skills/dotnet-performance-review and .opencode/skills/dotnet-performance-review in your project.

What does Dotnet Performance Review need to run?

SKILL.md names no scripts, command-line tools or credentials: Dotnet Performance Review is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Glob, Grep, Bash, mcp__serena__initial_instructions, mcp__serena__get_symbols_overview, mcp__serena__find_symbol, mcp__serena__find_referencing_symbols, mcp__serena__find_declaration, mcp__serena__find_implementations, mcp__serena__search_for_pattern, mcp__serena__get_diagnostics_for_file, mcp__serena__list_dir, mcp__serena__find_file.

Does Dotnet Performance Review access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Dotnet Performance Review safe to install?

Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Dotnet Performance Review use?

No licence was found for Dotnet Performance Review or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Dotnet Performance Review use?

About 1k tokens (SKILL.md is roughly 4.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Dotnet Performance Review?

Skills that share tags, products or a category with Dotnet Performance Review: Tiger Brokers OpenAPI C# SDK (qusong0627/QuantMind, 1.7k stars), Stock Indicators Dotnet (facioquo/stock-indicators-dotnet, 1.2k stars), Built In Standards (Nethereum/Nethereum, 2.3k stars) and Keystore (Nethereum/Nethereum, 2.3k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Dotnet Performance Review?

atherio-danp (a GitHub user) maintains it in atherio-danp/cde-dotnetcc, which has 109 GitHub stars. The repository holds 13 skills in this directory. The repository was last updated on July 26, 2026.

Source: atherio-danp/cde-dotnetcc on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.