Performance

Performance is a Quality skill for Claude Code, published by rtk-ai in rtk.

75.9K stars4.8K forkson rtk-ai/rtkAdded 2026/08/13Repository updated 2026/08/13

agentic-codingai-codinganthropicclaude-codeclicommand-line-toolcost-reductiondeveloper-toolsllmopen-sourceproductivityrusttoken-optimization

Install in seconds

Install Performance

Copy Performance into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/rtk-ai/rtk/tree/develop/.claude/skills/performance ~/.claude/skills/performance

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/rtk-ai/rtk.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: .claude/skills/performance/SKILL.md in rtk-ai/rtk
Installs to: ~/.claude/skills/performance
Collection: One of 12 skills cataloged from this repository
Category: Quality — 1354 skills

What Performance does

Performance analyzes RTK CLI startup time, memory usage, and token savings to detect and fix performance regressions. Use it after filter changes, dependency additions, or before release to verify the CLI meets <10ms startup, <5MB memory, and 60-90% token savings targets.

Performance is cataloged under Quality on DirSkills. Performance comes from a repository tagged agentic-coding, ai-coding, anthropic, claude-code and cli.

Documentation

README

Excerpt

Performance Optimization Skill

Systematic performance analysis and optimization for RTK CLI tool, focusing on startup time (<10ms), memory usage (<5MB), and token savings (60-90%).

When to Use

Automatically triggered: After filter changes, regex modifications, or dependency additions
Manual invocation: When performance degradation suspected or before release
Proactive: After any code change that could impact startup time or memory

RTK Performance Targets

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Performance

What else does rtk-ai publish alongside Performance?
Performance is one of 12 skills that DirSkills catalogs from rtk-ai/rtk, the repository it ships in. Its siblings there include Code Simplifier, Issue Triage and PR Review. Each one is a separate skill with its own page in this directory, installs the same way Performance does, and is maintained by rtk-ai in that same repository. The rest of the collection is listed on the rtk-ai/rtk page.
How does Performance compare to other Quality skills?
Performance ranks #34 by stars among the 1354 Quality skills in this catalog. The most-starred ones next to it are Benchmark, Benchmark Optimization Loop and API Design Patterns. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Performance against them. Open each page to compare what they document and how they install.