Analyzing .NET Performance
dotnet/skills
Scans C# and .NET code for about 50 performance anti-patterns and reports prioritized findings with concrete fixes, at a scan depth you choose.
Repository-specific checks for Microsoft.Build.Locator code reviews.
Install Code Review
$ npx skills add microsoft/MSBuildLocator --skill code-review -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install microsoft/MSBuildLocator code-review --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/microsoft/MSBuildLocator.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.github/skills/code-review .claude/skills/code-review && rm -rf skills-srcUse ~/.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/
Install the "code-review" agent skill from https://github.com/microsoft/MSBuildLocator/tree/main/.github/skills/code-review into .claude/skills/code-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-review", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/microsoft/MSBuildLocator/tree/main/.github/skills/code-reviewType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add microsoft/MSBuildLocator --skill code-review -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install microsoft/MSBuildLocator code-review --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/microsoft/MSBuildLocator.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.github/skills/code-review .agents/skills/code-review && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "code-review" agent skill from https://github.com/microsoft/MSBuildLocator/tree/main/.github/skills/code-review into .agents/skills/code-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-review", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add microsoft/MSBuildLocator --skill code-review -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install microsoft/MSBuildLocator code-review --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/microsoft/MSBuildLocator.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.github/skills/code-review .cursor/skills/code-review && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "code-review" agent skill from https://github.com/microsoft/MSBuildLocator/tree/main/.github/skills/code-review into .cursor/skills/code-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-review", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/microsoft/MSBuildLocator.git --path .github/skills/code-review--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add microsoft/MSBuildLocator --skill code-review -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install microsoft/MSBuildLocator code-review --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/microsoft/MSBuildLocator.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.github/skills/code-review .gemini/skills/code-review && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "code-review" agent skill from https://github.com/microsoft/MSBuildLocator/tree/main/.github/skills/code-review into .gemini/skills/code-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-review", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install microsoft/MSBuildLocator code-reviewInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add microsoft/MSBuildLocator --skill code-review -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/microsoft/MSBuildLocator.git skills-src && mkdir -p .github/skills && cp -r skills-src/.github/skills/code-review .github/skills/code-review && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "code-review" agent skill from https://github.com/microsoft/MSBuildLocator/tree/main/.github/skills/code-review into .github/skills/code-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-review", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add microsoft/MSBuildLocator --skill code-review -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install microsoft/MSBuildLocator code-review --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/microsoft/MSBuildLocator.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.github/skills/code-review .opencode/skills/code-review && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "code-review" agent skill from https://github.com/microsoft/MSBuildLocator/tree/main/.github/skills/code-review into .opencode/skills/code-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-review", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
code-review- GitHub stars
- 263
- Token cost
- ~293 tokens
- SKILL.md length
- 120 words
- Files
- 1
- Skills in repo
- 3
- Repo updated
- First seen
- Licence
- MIT
At a glance
Repository-specific checks for Microsoft.Build.Locator code reviews.
- Package changes
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Tasks that involve Code review
What it does
Code Review is an agent skill from microsoft/MSBuildLocator, published by the product's own GitHub organization. Repository-specific checks for Microsoft.Build.Locator code reviews. Use for loader, discovery, public API, and package changes.
Its SKILL.md is about 290 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 Development, covering Code review. It works with .NET. The repository describes itself as: An API to locate MSBuild assemblies from an installed Visual Studio location. Use this to ensure that calling the MSBuild API will use the same toolset that a build from Visual… The licence is MIT.
When your agent uses it
- Package changes
- Tasks that involve Code review
Example prompts
- “/code-review”
What it can do on your machine
Read from SKILL.md and the folder at commit ff0b900. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
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
Code Review loads about 293 tokens when it runs. Until then it costs about 35 tokens; SKILL.md has 120 words of instructions outside code blocks.
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 passed
The automated check found no risky patterns in SKILL.md.
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
The full file from microsoft/MSBuildLocator at commit ff0b900, republished under its MIT licence (© microsoft). 120 words, ~293 tokens.
Download SKILL.mdSave it as
.claude/skills/code-review/SKILL.md (or your agent's skills folder).- name
- code-review
- description
- Repository-specific checks for Microsoft.Build.Locator code reviews. Use for loader, discovery, public API, and package changes.
- license
- MIT
Microsoft.Build.Locator code review
Read AGENTS.md. For loader, registration, or discovery changes, also read the
applicable msbuild-loader-netcore or msbuild-loader-netframework skill; read
both for common code. Verify that the skills accurately describe the code, and
require them to change when behavior changes.
Check these repository-specific invariants:
- Common code must work on both
net46andnet8.0; runtime-specific behavior must stay behind the correct conditional. - Registration must happen before any core
Microsoft.Build*assembly loads. - .NET Framework discovers Visual Studio; .NET 8+ discovers the .NET SDK.
- .NET Framework changes must remain compatible across supported Visual Studio versions; do not assume only the latest MSBuild layout or behavior.
Microsoft.Build.Locator.dllmust retain minimal framework-only dependencies.- Intentional public API changes require compatibility suppressions and an appropriate version change.
© microsoft, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in .github/skills/code-review of microsoft/MSBuildLocator.
Open the folder on GitHubat commit ff0b900
Compare with similar skills
Code 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Code Review this skillmicrosoft/MSBuildLocator | 263 | — | ~293 | Automated safety check: Pass | MIT | |
| Analyzing .NET Performancedotnet/skills | 5.6k | 3 repos | ~3.1k | Automated safety check: Pass | MIT | |
| Code Reviewdotnet/macios | 2.9k | — | ~1.7k | Automated safety check: Pass | Custom licence | |
| MAUI PR Performance Analysisdotnet/maui | 23k | — | ~2.4k | Automated safety check: Pass | MIT | |
| Code Reviewjonathanpeppers/dotnes | 780 | — | ~2.1k | Automated safety check: Pass | MIT | |
| Find Reviewable MAUI PRsdotnet/maui | 23k | — | ~1.7k | Automated safety check: Pass | MIT |
Similar skills
- Official
- Official
Code Review
dotnet/macios
Review dotnet/macios PRs against established rules. An agent skill from dotnet/macios.
- Official
MAUI PR Performance Analysis
dotnet/maui
Interprets pinned managed benchmark evidence for a dotnet/maui pull request and writes a narrative for the performance review workflow, without running or publishing anything.
Code Review
jonathanpeppers/dotnes
Review dotnes pull requests against established repository rules.
- Official
Find Reviewable MAUI PRs
dotnet/maui
Lists open pull requests in dotnet/maui and dotnet/docs-maui that are worth reviewing next, ranked by priority labels, milestone and partner or community origin.
Code Review
sbroenne/mcp-windows
Review pull requests in mcp-windows for concrete bugs in MCP and CLI contracts, Windows UI automation, element identity, snapshots, bounded searches, and service lifetime.
More from microsoft/MSBuildLocator
- Official
MSBuildLocator .NET Core Loader
microsoft/MSBuildLocator
Reference for how MSBuildLocator loads MSBuild assemblies and finds the .NET SDK on .NET Core hosts, for anyone editing or debugging that loader code.
- Official
MSBuildLocator .NET Framework Loader
microsoft/MSBuildLocator
Explains how MSBuildLocator loads MSBuild assemblies and finds Visual Studio installs on the .NET Framework net46 target, for anyone editing or reviewing that code.
Related
Works with
Categories
Questions about Code Review
What does Code Review do?
Repository-specific checks for Microsoft.Build.Locator code reviews. Code Review is an agent skill from microsoft/MSBuildLocator, published by the product's own GitHub organization.Locator code reviews.
When should I use Code Review?
Code Review fits situations like: package changes; tasks that involve Code review.
How do I install Code Review in Claude Code?
Run `npx skills add microsoft/MSBuildLocator --skill code-review -a claude-code`. Or copy the skill folder (.github/skills/code-review in microsoft/MSBuildLocator) into .claude/skills/code-review in your project. Claude Code loads it when a task matches its description.
How do I install Code Review in Codex?
Run `npx skills add microsoft/MSBuildLocator --skill code-review -a codex`. Or copy the skill folder (.github/skills/code-review in microsoft/MSBuildLocator) into .agents/skills/code-review in your project. Codex loads it when a task matches its description.
Can I use Code 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 microsoft/MSBuildLocator --skill code-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/code-review, .gemini/skills/code-review, .github/skills/code-review and .opencode/skills/code-review in your project.
What does Code Review need to run?
SKILL.md names no scripts, command-line tools or credentials: Code Review is instructions for the agent only.
Does Code 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 Code Review safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Code Review use?
Code Review is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Code Review use?
About 293 tokens (SKILL.md is roughly 1.2k 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 Code Review?
Skills that share tags, products or a category with Code Review: Analyzing .NET Performance (dotnet/skills, 5.6k stars), Code Review (dotnet/macios, 2.9k stars), MAUI PR Performance Analysis (dotnet/maui, 23k stars) and Code Review (jonathanpeppers/dotnes, 780 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Code Review?
microsoft (a GitHub organization, an official publisher) maintains it in microsoft/MSBuildLocator, which has 263 GitHub stars. The repository holds 3 skills in this directory. The repository was last updated on October 6, 2026.
Source: microsoft/MSBuildLocator on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.