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Mutation Test Insights

running-mutation-tests

jeremylongshore/claude-code-plugins-plus-skills

Introduces deliberate code mutations, reruns the suite, and reports surviving mutants plus a mutation score whenever the user asks to assess or improve test effectiveness.

SEO Optimization Guide

tech-leads-club/agent-skills

Provides step-by-step guidance on technical SEO, on-page metadata, structured data, URLs, sitemaps, and security headers to improve visibility as per Lighthouse and Google SEO guidelines.

Vast.ai Performance Tuning

vastai-performance-tuning

jeremylongshore/claude-code-plugins-plus-skills

Guides Vast.ai users through caching, batching, Docker optimizations, rsync transfers, and lifecycle scripting to improve API responsiveness, data moves, and GPU training throughput for automated workloads.

VastAi SDK Patterns

vastai-sdk-patterns

jeremylongshore/claude-code-plugins-plus-skills

Production-ready guidance on adopting Http.ai SDK design patterns for TypeScript and Python, covering singleton clients, safe wrappers, retries, and validation to standardize Vast.ai integrations and improve API reliability.

Windsurf Performance Profiling

windsurf-performance-profiling

jeremylongshore/claude-code-plugins-plus-skills

AI-assisted performance profiling for Windsurf projects, guiding users through baseline capture, data collection, Cascade analysis, and optimization recommendations to eliminate bottlenecks and predict improvements.

Skill Improvement Loop

trailofbits/skills

Automates iterative use of the plugin-dev skill-reviewer agent to diagnose and fix Claude Code SKILL.md issues, driving repeated review/fix cycles until standards are met before emitting the completion marker.

Verification Before Completion

verification-before-completion

obra/superpowers

Framework ensuring no completion claims are made until fresh verification commands are run and their outputs read, so tests/builds/regressions are proven before anyone says the work is done.

User Story Splitting

user-story-splitting

deanpeters/Product-Manager-Skills

Break large user stories, epics, or features into smaller, independently deliverable stories using systematic splitting patterns so agile teams can reduce risk, improve estimation, and keep value flowing when backlog items grow too big.

Performance Optimization Guide

performance-optimizer

sickn33/antigravity-awesome-skills

Analyzes slow apps, APIs, databases, and frontend bundles by profiling bottlenecks, applying tactics like indexing, caching, parallel operations, memoization, and tuned payloads, and measuring before/after to prove performance gains.

Skill Improvement Cycle

sickn33/antigravity-awesome-skills

Defines an iterative process for improving Claude Code skills by running the plugin-dev skill-reviewer agent, classifying issues, fixing critical/major problems, and validating fixes until the quality bar is met.

Perl Testing Patterns

affaan-m/everything-claude-code

Provides a Perl testing strategy that combines Test::More, Test2::V0, prove, mocking helpers, and coverage tooling to follow RED-GREEN-REFACTOR TDD workflows for modules and applications.

Image SEO Optimization

AgriciDaniel/claude-seo

Performs a deep audit of site imagery for SEO and performance, checking alt text, responsive sources, file size thresholds, modern formats, lazy loading, and CLS safeguards to guide improvements for faster, accessible pages.

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