Scripting

This skill should be used when the user wants to "create a skill", "add a skill to plugin", "write a new skill", "improve skill description", "organize skill content", or needs guidance on skill structure, progressive disclosure, or skill development best practices for Claude Code plugins.

Bootstrap new projects with strong typing, linting, formatting, and testing. Supports Python, TypeScript, and other languages with research fallback.

Best practices for writing shell scripts. Use when writing bash, sh, zsh, or other shell code for automation, scripting, or command-line tasks.

This skill should be used when the user asks about "bun:ffi", "foreign function interface", "calling C from Bun", "native libraries", "dlopen", "shared libraries", "calling native code", or integrating C/C++ libraries with Bun.

Cloudflare Sandboxes SDK for secure code execution in Linux containers at edge. Use for untrusted code, Python/Node.js scripts, AI code interpreters, git operations.

Ultracite Rust-based linting/formatting (Biome). Use for project setup, Git hooks, migrations from ESLint/Prettier, or encountering configuration, monorepo, framework integration errors.

Claude Code Bash tool patterns with hooks, automation, git workflows. Use for PreToolUse hooks, command chaining, CLI orchestration, custom commands, or encountering bash permissions, command failures, security guards, hook configurations.

Evaluate JavaScript at bundle time and inline results. Use when optimizing compile-time code generation, embedding files, inlining environment variables, or executing code during the bundling process.

Validate test effectiveness with mutation testing using Stryker (TypeScript/JavaScript) and mutmut (Python). Find weak tests that pass despite code mutations. Use to improve test quality.

Clean codebase by eliminating waste through deletion and simplification. Use when asked to remove dead code, clean up unused imports, delete debug statements, or simplify over-engineered code. Triggers on: "use janitor mode", "clean up", "remove dead code", "delete unused", "simplify", "janitor", "eliminate waste", "reduce complexity", "remove debug code". Full access mode - modifies files and runs tests.

Locate source code repositories for Python packages by analyzing PyPI metadata, project URLs, and code hosting platforms like GitHub, GitLab, and Bitbucket. Provides deterministic results with confidence levels.

Write lua scripts and modules following repository conventions. Use for lua code, subprocess spawning, config files, or shell script replacements. Includes patterns for file I/O, command execution, bidirectional pipes, error handling, and module structure.

This skill should be used when the user needs to search for information, find files, look up content online, or retrieve data without providing input files. Trigger phrases include: - "search for", "find", "look up", "research" - "search the web", "search online", "fetch from URL" - "search files", "scan codebase", "find in project", "grep for" - "get news from", "read hacker news", "check what's trending" Supports multiple search modes: - local: Search local filesystem using Glob, Grep, Read, Bash - web: Search web content using WebSearch, WebFetch - future: Pluggable providers (jina.ai, firecrawl, exa.ai) This is an input-less skill - it executes search missions autonomously.

Integrates payment processing with Stripe, PayPal, or Square including subscriptions, webhooks, and PCI compliance. Use when implementing checkout flows, recurring billing, or handling refunds and disputes.

GitHub repository automation (CI/CD, issue templates, Dependabot, CodeQL). Use for project setup, Actions workflows, security scanning, or encountering YAML syntax, workflow configuration, template structure errors.

Repo Updater - A Bash CLI for synchronizing dozens or hundreds of GitHub repositories with a single command. Features parallel sync, conflict resolution, JSON output, and resume capability.

Comprehensive guide for Google Apps Script development covering all built-in services (SpreadsheetApp, DocumentApp, GmailApp, DriveApp, CalendarApp, FormApp, SlidesApp), triggers, authorization, error handling, and performance optimization. Use when automating Google Sheets operations, creating Google Docs, managing Gmail/email, working with Google Drive files, automating Calendar events, implementing triggers (time-based, event-based), building custom functions, creating add-ons, handling OAuth scopes, optimizing Apps Script performance, working with UrlFetchApp for API calls, using PropertiesService for persistent storage, or implementing CacheService for temporary data. Covers batch operations, error recovery, and JavaScript ES6+ runtime.

This skill should be used when the user asks about "bun build", "Bun.build", "bundling with Bun", "code splitting", "tree shaking", "minification", "sourcemaps", "bundle optimization", "esbuild alternative", "building for production", "bundling TypeScript", "bundling for browser", "bundling for Node", or JavaScript/TypeScript bundling with Bun.

Browser automation with Puppeteer CLI scripts. Use for screenshots, performance analysis, network monitoring, web scraping, form automation, or encountering JavaScript debugging, browser automation errors.

Multi-language Workers development with Rust, Python, and WebAssembly. Use when building Workers in languages other than JavaScript/TypeScript, or when integrating WASM modules for performance-critical code.