Coding standards, frameworks, refactoring, and code review (16.4K skills)
Parse Claude Code JSONL session logs from ~/.claude/projects/ for tool call inventory, token costs, error detection, subagent traces, and compaction detection
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Creates rule files for the Claude Code framework. Rules are markdown files in .claude/rules/ that are auto-loaded by Claude Code.
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Rust programming expert including ownership, borrowing, lifetimes, async Tokio patterns, error handling, trait system, performance optimization, testing, and production systems development
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Enhanced code search with custom ripgrep binary supporting ES module extensions and advanced patterns.
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Specifies standards for RestController classes, including API route mappings, HTTP method annotations, dependency injection, and error handling with ApiResponse and GlobalExceptionHandler.
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Python backend expert including Django, FastAPI, Flask, SQLAlchemy, and async patterns
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Process and act on code review feedback. Use when receiving review results.
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Dispatch code-reviewer agent for two-stage review. Use after completing implementation tasks.
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Prioritizes the use of new features available in Python 3.12 and later versions.
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React Native and Expo best practices for building performant mobile apps. Use when building React Native components, optimizing list performance, implementing animations, or working with native modules. Triggers on tasks involving React Native, Expo, mobile performance, or native platform APIs.
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React ecosystem expert including hooks, state management, component patterns, React 19 features, Shadcn UI, and Radix primitives
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React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance patterns. Triggers on tasks involving React components, Next.js pages, data fetching, bundle optimization, or performance improvements.
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Compiler-level code intelligence via native LSP — definitions, references, types, call hierarchies, and diagnostics.
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iOS development expert including SwiftUI, UIKit, and Apple frameworks
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Modern Python tooling best practices using uv, ruff, ty, and pytest. Mandates the Trail of Bits Python coding standards for project setup, dependency management, linting, type checking, and testing. Based on patterns from trailofbits/cookiecutter-python.
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Applies general coding standards and best practices for Kafka development with Scala.
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Use when the user wants to use Google Gemini for analysis, large files or codebases, sandbox execution, or brainstorming. Uses headless Gemini CLI scripts (no MCP). Triggers on "use Gemini", "analyze with Gemini", "large file", "sandbox", "brainstorm with Gemini".
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Shell out to Claude Code CLI to invoke a second Claude session headlessly. Useful for cross-validation, second opinions, and isolated analysis without sharing current agent context. Requires Anthropic account.
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Entity and relation tracking skill using MCP memory server patterns and local knowledge graph storage. Build persistent knowledge graphs of entities, relationships, and observations across agent sessions. Covers the MCP memory server (@modelcontextprotocol/server-memory), local JSON-based graphs, and entity-relation querying patterns for long-running agents.
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Next.js 16 caching model expertise covering the 'use cache' directive, cacheLife() API, cacheTag() for invalidation, cacheComponents configuration, and Partial Prerendering (PPR). Use when implementing caching strategies in Next.js 16+ applications, migrating from unstable_cache, or optimizing server component rendering.
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Shell out to Cursor Agent CLI for headless IDE-aware code tasks. Supports multi-model routing (auto mode routes to Claude, Gemini, GPT). Requires Cursor Pro/Business subscription.
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Shell out to OpenAI Codex CLI for headless code generation, analysis, and question-answering. Optimized for code tasks. Requires OPENAI_API_KEY env var.
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Node.js backend expert including Express, NestJS, and async patterns
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Next.js framework expert including App Router, Server Components, and API routes
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