AWS S3 object storage for bucket management, object operations, and access control. Use when creating buckets, uploading files, configuring lifecycle policies, setting up static websites, managing permissions, or implementing cross-region replication.

Remove AI-generated code slop from the current branch. Use after writing code to clean up unnecessary comments, defensive checks, and inconsistent style.

Use when writing prose humans will read—documentation, commit messages, error messages, explanations, reports, or UI text. Applies Strunk's timeless rules for clearer, stronger, more professional writing.

Forces the laziest solution that actually works, simplest, shortest, most minimal. Channels a senior dev who has seen everything: question whether the task needs to exist at all (YAGNI), reach for the standard library before custom code, native platform features before dependencies, one line before fifty. Supports intensity levels: lite, full (default), ultra. Use on ANY coding task: writing, adding, refactoring, fixing, reviewing, or designing code, and choosing libraries or dependencies. Also use whenever the user says "ponytail", "be lazy", "lazy mode", "simplest solution", "minimal solution", "yagni", "do less", or "shortest path", or complains about over-engineering, bloat, boilerplate, or unnecessary dependencies. Do NOT use for non-coding requests (general knowledge, prose, translation, summaries, recipes).

Convert existing Artillery YAML scripts to TypeScript or ESM JavaScript, auto-detecting the best output format, resolving YAML anchors by inlining, type-annotating exports, and verifying the output via tsc or node --check. Use when the user wants to migrate, rewrite, or translate Artillery load-test scripts from YAML to TS/JS for better IDE support, type checking, and composability.

Project scaffolding templates for new applications. Use when creating new projects from scratch. Contains 12 templates for various tech stacks.

Implement comprehensive observability for service meshes including distributed tracing, metrics, and visualization. Use when setting up mesh monitoring, debugging latency issues, or implementing SLOs for service communication.

Implement DeFi protocols with production-ready templates for staking, AMMs, governance, and flash loans. Use when building decentralized finance applications or smart contract protocols.

Design microservices architectures with service boundaries, event-driven communication, and resilience patterns. Use when building distributed systems, decomposing monoliths, or implementing microservices.

When the user wants to edit, review, or improve existing marketing copy, or refresh outdated content. Also use when the user mentions 'edit this copy,' 'review my copy,' 'copy feedback,' 'proofread,' 'polish this,' 'make this better,' 'copy sweep,' 'tighten this up,' 'this reads awkwardly,' 'clean up this text,' 'too wordy,' 'sharpen the messaging,' 'refresh this content,' 'update this page,' 'this content is outdated,' or 'content audit.' Use this when the user already has copy and wants it improved or refreshed rather than rewritten from scratch. For writing new copy, see copywriting.

Transforms vague or ill-defined questions into clear, structured, and actionable "good problems" by extracting the core objective, identifying comparison dimensions, and applying structured reasoning. Use when a user wants to compare multiple options, evaluate trade-offs, make a decision between alternatives, or asks questions like "which is better", "pros and cons", "help me decide", "how should I choose", or "what are the trade-offs". Produces a rewritten problem statement with explicit comparison dimensions, a structured evaluation framework, and a decision-ready output format.

Send emails, buy forwarding inboxes, manage custom subdomains, and read messages programmatically via x402. USE FOR: - Sending emails (one-off or from custom addresses) - Buying a forwarding inbox (username@x402email.com) - Purchasing custom email subdomains (you@yourname.x402email.com) - Reading and managing inbox messages programmatically - Setting up catch-all forwarding for subdomains - Managing authorized signers for shared subdomains TRIGGERS: - "send email", "email this to", "notify by email" - "buy inbox", "forwarding address", "email inbox" - "custom domain", "subdomain", "email subdomain" - "read emails", "check inbox", "list messages" - "email address", "disposable email", "temporary email" ALWAYS use `npx agentcash fetch` for stableemail.dev endpoints. IMPORTANT: Use exact endpoint paths from the Quick Reference table below.

Make AI phone calls, buy phone numbers, and get call transcripts via x402. USE FOR: - Making AI-powered outbound phone calls - Scheduling calls and getting transcripts - Buying and managing phone numbers - Leaving voicemails - Transferring calls to humans TRIGGERS: - "call", "phone call", "make a call", "dial" - "buy number", "phone number", "get a number" - "voicemail", "leave a message" - "transcript", "call recording", "call summary" - "AI call", "automated call", "bland" ALWAYS use `npx agentcash fetch` for stablephone.dev endpoints. IMPORTANT: Use exact endpoint paths from the Quick Reference table below.

Manage your agentcash wallet and call any x402-protected API with automatic payment. No API keys, no subscriptions — just a funded wallet (USDC on Base). USE FOR: - Checking wallet balance before API calls - Redeeming invite codes for free credits - Getting deposit address for USDC - Discovering endpoints and pricing on any x402-protected origin - Making paid API requests via the agentcash CLI - Troubleshooting payment failures TRIGGERS: - "balance", "wallet", "funds", "credits", "x402" - "redeem", "invite code", "promo code" - "deposit", "add funds", "top up" - "discover", "endpoints", "what APIs", "pricing" - "insufficient balance", "payment failed"

Enforces the Airbnb iOS Swift Style Guide on Swift code. Use this skill any time the user wants to: review Swift code for style compliance, lint or audit an iOS codebase, apply Airbnb Swift conventions to new or existing code, understand why code violates Airbnb style rules, or get corrected rewrites of Swift snippets. Triggers on any request mentioning Swift code quality, iOS code review, Airbnb style, linting Swift files, or when the user pastes Swift code and asks for feedback, fixes, or a review. Also use when the user asks to "clean up" or "format" Swift code, or asks "is this good Swift?" — even if they don't mention Airbnb by name.

Handle errors as values instead of throwing exceptions. Result/Either pattern, railway-oriented programming, and validation with error accumulation. Activate when: writing error handling, try/catch blocks, validation logic, operations that can fail, chaining fallible operations, form validation, API input validation, or when the user mentions Result, Either, error handling, or validation patterns. Works in any language (TypeScript, Python, Go, Rust, Java).

Build complex behavior by composing small, reusable functions. Covers currying, partial application, pipe/flow, data-last design, and building utility libraries from tiny pieces. Activate when: creating utility functions, building data processing pipelines, chaining transformations, refactoring large functions into smaller ones, or when the user mentions pipe, compose, curry, partial application, point-free, data-last, or function composition. Works in any language (TypeScript, Python, Go, Rust, Java).

Never mutate data — create new values instead. Covers immutable update patterns (spread, copy, freeze), nested updates without mutation, readonly enforcement, and performance trade-offs. Activate when: updating objects or arrays, working with state management (React, Redux), fixing bugs caused by unintended mutation, deeply nested data updates, or when the user mentions immutability, spread, readonly, frozen, copy-on-write, or structural sharing. Works in any language (TypeScript, Python, Go, Rust, Java).

Build, audit, and improve Claude Code skills through guided interview and generation. Use when user says "create a skill", "build a skill", "make a new skill", "write a skill", "improve this skill", "audit this skill", "review my skill", "skill from scratch", "turn this into a skill", or /skill-builder. Produces guide-compliant skill directories with SKILL.md, references, and scripts.

libutil - General utilities. countTokens and estimateTokens for GPT-style token counting. generateHash creates SHA256 hashes. generateUuid creates unique IDs findProjectRoot locates repository root. updateEnvFile modifies environment files. exec runs child processes. createBundler downloads code bundles. Use for token counting, hashing, and project utilities.