Coding standards, frameworks, refactoring, and code review (18.1K skills)
Use established Go patterns when writing, reviewing, or refactoring applications. The guidance covers clear code, useful zero values, error handling, concurrency, interface and package design, memory use, and common Go tooling to help keep code predictable and maintainable.
Use this skill to design or review REST APIs, including resource URLs, HTTP methods and status codes, pagination, filtering, errors, versioning, and rate limits. It helps make endpoint behavior and response formats consistent for clients and developers.
Use this skill to make practical PostgreSQL choices for queries, schema design, indexes, row-level security, and connection settings. It provides quick reference patterns and SQL checks for slow queries, missing foreign-key indexes, and table bloat.
Choose which Everything Claude Code skills and rules to install for a user or project. The guide copies the selected files, checks paths and cross references, reports problems, and can tailor installed content to the project.
Learn patterns for adding Apple’s FoundationModels to iOS 26+ apps. Generate text, return typed data with `@Generable`, let the model call custom tools, and stream partial results to the UI, while checking model availability and respecting the stated context limit.
Plan safer database schema and data changes for PostgreSQL, MySQL, and common migration tools. The skill covers reversible migrations, large-table backfills, rollback planning, and staged deployment patterns that help avoid downtime in production systems.
Apply JPA and Hibernate patterns in Spring Boot for entity mapping, relationships, repositories, transactions, auditing, pagination, indexing, and connection pools. The guidance also covers query tuning, including ways to prevent N+1 queries, and database migration practices.
Search and retrieve Stripe documentation and API references from the terminal. Use it to check how a product or endpoint works, find guidance by keyword, and access gated documentation after signing in with the Stripe CLI.
Build, modify, or review Stripe Apps and extensions for Dashboard interfaces, scripts, workflow actions, authentication, and event handling. The skill checks documented product capabilities and limitations, selects relevant implementation guidance, and helps determine whether an extension fits a billing or workflow need.
Guides teams planning, building, testing, or reviewing Stripe integrations. It helps select suitable APIs and test environments for payments, subscriptions, marketplaces, and tax, while covering secure key handling, webhooks, and migration from deprecated patterns.
Plan a Stripe version upgrade across API pins, webhook destinations, server SDKs, Stripe.js, and mobile SDKs. The skill checks the target version, highlights relevant migration steps, and helps stage and test changes while distinguishing versioned snapshot events from unversioned thin events.
Build and review React or Next.js interfaces with TypeScript and Tailwind CSS. Get help creating components, checking accessibility, examining bundle size, and applying performance patterns such as choosing server or client components appropriately.
Run performance benchmarks one at a time with a warmup, minimum measurement durations, and reruns for anomalies. Use the resulting metrics to establish a baseline or check for regressions, with results emitted in a marked JSON block.
Map the code paths related to a performance scenario before profiling. The skill identifies entry points, handlers, and likely hot files, then lists relevant files and symbols with brief evidence and call-chain context where useful.
Review skill-bus session telemetry at work transitions to see which skills were intercepted, which subscriptions may be missing, and which conditions caused skips. Receive a brief interpretation and possible subscription improvements based on the available data.
Profile CPU or memory intensive paths to locate hotspots, meaning code that consumes significant resources. The skill records file and line evidence and provides a flame graph or equivalent profile output when possible.
Plan, implement, review, and evaluate MCP servers that let AI agents work with external APIs and services. The guide covers Python with FastMCP and Node or TypeScript with the MCP SDK, including tool schemas, errors, and realistic evaluations.
Store performance metrics and environment details in one JSON baseline per version, then use those baselines to organize results and compare versions. The skill specifies where each file belongs and how same-version updates are handled.
Resume skill-bus subscription processing by re-enabling the paused global or project setting. The skill checks both configuration levels, resumes a single paused level automatically, and asks which scope to restore when both are paused.
Reviews recent Claude Code chats to summarize work patterns, highlight recurring challenges and strengths, and suggest areas to study. It gathers relevant articles and discussions from HackerNews and sends a personalized development report to Slack DMs.
Turn performance investigation data, experiment results, profiling evidence, and tested hypotheses into concise recommendations and next steps. The skill cites only evidence found in logs or code, and flags insufficient data when another run is needed.
Investigate a specific performance scenario by checking relevant Git history and code paths, then produce up to five evidence-backed hypotheses with confidence levels. It helps focus investigation without proposing optimizations or fixes.
Review active skill-bus subscriptions from global and project configuration together. See merge status, conditions set at both insertion and subscription levels, how those conditions combine, and optionally simulate which subscriptions would match a scenario.
Appends structured notes for each performance investigation phase, preserving exact user quotes alongside summaries, decisions, and evidence pointers such as files, metrics, and commands. It stores notes under the configured state directory for later reference.