MCP Server Builder
anthropics/skills
Guides the design and implementation of Model Context Protocol servers in TypeScript or Python, from tool naming and error messages to evaluation.
Performance analysis. An agent skill from foldkit/foldkit.
MITAuto-check passed
Install Performance Analysis
$ npx skills add foldkit/foldkit --skill performance-analysis -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install foldkit/foldkit performance-analysis --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/foldkit/foldkit.git skills-src && mkdir -p .claude/skills && cp -r skills-src/repos/effect/.agents/skills/performance-analysis .claude/skills/performance-analysis && 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 "performance-analysis" agent skill from https://github.com/foldkit/foldkit/tree/main/repos/effect/.agents/skills/performance-analysis into .claude/skills/performance-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "performance-analysis", 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/foldkit/foldkit/tree/main/repos/effect/.agents/skills/performance-analysisType 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 foldkit/foldkit --skill performance-analysis -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install foldkit/foldkit performance-analysis --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/foldkit/foldkit.git skills-src && mkdir -p .agents/skills && cp -r skills-src/repos/effect/.agents/skills/performance-analysis .agents/skills/performance-analysis && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "performance-analysis" agent skill from https://github.com/foldkit/foldkit/tree/main/repos/effect/.agents/skills/performance-analysis into .agents/skills/performance-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "performance-analysis", 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 foldkit/foldkit --skill performance-analysis -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install foldkit/foldkit performance-analysis --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/foldkit/foldkit.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/repos/effect/.agents/skills/performance-analysis .cursor/skills/performance-analysis && 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 "performance-analysis" agent skill from https://github.com/foldkit/foldkit/tree/main/repos/effect/.agents/skills/performance-analysis into .cursor/skills/performance-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "performance-analysis", 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/foldkit/foldkit.git --path repos/effect/.agents/skills/performance-analysis--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 foldkit/foldkit --skill performance-analysis -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install foldkit/foldkit performance-analysis --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/foldkit/foldkit.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/repos/effect/.agents/skills/performance-analysis .gemini/skills/performance-analysis && 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 "performance-analysis" agent skill from https://github.com/foldkit/foldkit/tree/main/repos/effect/.agents/skills/performance-analysis into .gemini/skills/performance-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "performance-analysis", 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 foldkit/foldkit performance-analysisInstalls 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 foldkit/foldkit --skill performance-analysis -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/foldkit/foldkit.git skills-src && mkdir -p .github/skills && cp -r skills-src/repos/effect/.agents/skills/performance-analysis .github/skills/performance-analysis && 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 "performance-analysis" agent skill from https://github.com/foldkit/foldkit/tree/main/repos/effect/.agents/skills/performance-analysis into .github/skills/performance-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "performance-analysis", 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 foldkit/foldkit --skill performance-analysis -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install foldkit/foldkit performance-analysis --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/foldkit/foldkit.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/repos/effect/.agents/skills/performance-analysis .opencode/skills/performance-analysis && 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 "performance-analysis" agent skill from https://github.com/foldkit/foldkit/tree/main/repos/effect/.agents/skills/performance-analysis into .opencode/skills/performance-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "performance-analysis", 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
performance-analysis- GitHub stars
- 912
- Token cost
- ~173 tokens
- SKILL.md length
- 62 words
- Files
- 3
- Skills in repo
- 17
- Repo updated
- First seen
- Licence
- MIT
At a glance
Performance analysis. An agent skill from foldkit/foldkit.
- Runtime throughput
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Latency benchmarks
- TypeScript compiler cost
What it does
Performance Analysis is an agent skill from foldkit/foldkit. Performance analysis. Use for runtime throughput or latency benchmarks, TypeScript compiler cost, performance regressions, comparison harnesses, or thresholds.
Its SKILL.md is about 170 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `runtime.md` and `types.md`).
It works with TypeScript. The licence is MIT.
When your agent uses it
- Runtime throughput
- Latency benchmarks
- TypeScript compiler cost
- Performance regressions
Example prompts
- “/performance-analysis”
What it can do on your machine
Read from SKILL.md and the folder at commit ffbbde1. 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
Performance Analysis loads about 173 tokens when it runs. Until then it costs about 45 tokens; SKILL.md has 62 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 foldkit/foldkit at commit ffbbde1, republished under its MIT licence (© foldkit). 62 words, ~173 tokens.
Download SKILL.mdSave it as
.claude/skills/performance-analysis/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.- name
- performance-analysis
- description
- Performance analysis. Use for runtime throughput or latency benchmarks, TypeScript compiler cost, performance regressions, comparison harnesses, or thresholds.
Validate correctness with focused tests before measuring. Compare the same focused operation and environment across revisions; a single unpaired run is not evidence of improvement.
Select every applicable branch:
- Runtime performance: Read runtime.md.
- Type performance: Read types.md.
The task is complete when every selected branch meets its measurement and reporting criteria and applicable root checks pass or are reported as not runnable.
© foldkit, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 2 other files in repos/effect/.agents/skills/performance-analysis of foldkit/foldkit.
- SKILL.md
- runtime.md
- types.md
Open the folder on GitHubat commit ffbbde1
Compare with similar skills
Performance Analysis 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 |
|---|---|---|---|---|---|---|
| Performance Analysis this skillfoldkit/foldkit | 912 | — | ~173 | Automated safety check: Pass | MIT | |
| MCP Server Builderanthropics/skills | 180k | 62 repos | ~2.3k | Automated safety check: Pass | Apache-2.0 | |
| Web Artifacts Builderanthropics/skills | 180k | 40 repos | ~769 | Automated safety check: Pass | Apache-2.0 | |
| Typescript Advanced Typesrolling-scopes/rsschool-app | 10k | 24 repos | ~4.2k | Automated safety check: Pass | MPL-2.0 | |
| Code Review ChecklistshareAI-lab/learn-claude-code | 78k | 5 repos | ~1.1k | Automated safety check: Pass | MIT | |
| MCP Server BuildershareAI-lab/learn-claude-code | 78k | 5 repos | ~1.2k | Automated safety check: Pass | MIT |
Similar skills
- Official
- Official
Web Artifacts Builder
anthropics/skills
Builds multi-component claude.ai HTML artifacts as a small React, TypeScript and Tailwind project, then bundles it into one shareable HTML file.
Typescript Advanced Types
rolling-scopes/rsschool-app
Master TypeScript's advanced type system including generics, conditional types, mapped types, template literals, and utility types for building type-safe applications.
Code Review Checklist
shareAI-lab/learn-claude-code
Reviews code against a five-part checklist covering security, correctness, performance, maintainability and testing, and reports findings in a fixed format.
MCP Server Builder
shareAI-lab/learn-claude-code
Walks through building MCP servers in Python or TypeScript that expose tools, resources and prompts to Claude, with templates, registration and testing.
Nx Import
nrwl/nx
Import, merge, or combine repositories into an Nx workspace using nx import.
More from foldkit/foldkit
All 17 skills in this repoCommit Changes
foldkit/foldkit
Create a git commit in the Foldkit monorepo with changeset enforcement and formatting.
Foldkit
foldkit/foldkit
A skill your agent uses whenever working with Foldkit. An agent skill from foldkit/foldkit.
Audit Program
foldkit/foldkit
Audit an existing Foldkit program against the architecture, conventions, and quality bar.
Generate Program
foldkit/foldkit
Generate a complete, idiomatic Foldkit program from a natural language description.
Changesets
foldkit/foldkit
Concise PR finalization changesets. An agent skill from foldkit/foldkit.
Dependency Maintenance
foldkit/foldkit
Dependency maintenance. An agent skill from foldkit/foldkit.
Related
Works with
Questions about Performance Analysis
What does Performance Analysis do?
Performance analysis. An agent skill from foldkit/foldkit. Performance Analysis is an agent skill from foldkit/foldkit. Performance analysis.
When should I use Performance Analysis?
Performance Analysis fits situations like: runtime throughput; latency benchmarks; typeScript compiler cost; performance regressions.
How do I install Performance Analysis in Claude Code?
Run `npx skills add foldkit/foldkit --skill performance-analysis -a claude-code`. Or copy the skill folder (repos/effect/.agents/skills/performance-analysis in foldkit/foldkit) into .claude/skills/performance-analysis in your project. Claude Code loads it when a task matches its description.
How do I install Performance Analysis in Codex?
Run `npx skills add foldkit/foldkit --skill performance-analysis -a codex`. Or copy the skill folder (repos/effect/.agents/skills/performance-analysis in foldkit/foldkit) into .agents/skills/performance-analysis in your project. Codex loads it when a task matches its description.
Can I use Performance Analysis 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 foldkit/foldkit --skill performance-analysis -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/performance-analysis, .gemini/skills/performance-analysis, .github/skills/performance-analysis and .opencode/skills/performance-analysis in your project.
What does Performance Analysis need to run?
SKILL.md names no scripts, command-line tools or credentials: Performance Analysis is instructions for the agent only.
Does Performance Analysis 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 Performance Analysis 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 Performance Analysis use?
Performance Analysis is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Performance Analysis use?
About 173 tokens (SKILL.md is roughly 692 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 Performance Analysis?
Skills that share tags, products or a category with Performance Analysis: MCP Server Builder (anthropics/skills, 180k stars), Web Artifacts Builder (anthropics/skills, 180k stars), Typescript Advanced Types (rolling-scopes/rsschool-app, 10k stars) and Code Review Checklist (shareAI-lab/learn-claude-code, 78k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Performance Analysis?
foldkit (a GitHub organization) maintains it in foldkit/foldkit, which has 912 GitHub stars. The repository holds 17 skills in this directory. The repository was last updated on October 7, 2026.
Source: foldkit/foldkit on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.