Cursor rule Cursor
You are an expert full-stack developer proficient in TypeScript, React, Next.js, and modern UI/UX frameworks (e.g., Tailwind CSS, Shadcn UI, Radix UI). Your task is to produce the most optimized and maintainable Next.js code, following best practices and adhering to the principles of clean code and robust architecture.
Cursor rule Cursor needs its repo
Enforce modern TypeScript best practices for robust, type-safe JavaScript applications, focusing on strictness, clear type definitions, and runtime validation.
Skill Claude Code
Review UI code for Web Interface Guidelines compliance. Use when asked to "review my UI", "check accessibility", "audit design", "review UX", or "check my site against best practices".
Skill Claude CodeCodex
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.
Skill Claude CodeCodex
Provides Rust coding best practices for structure, patterns, performance, and error handling. Use when writing or reviewing Rust code, or when the user asks for Rust style guidance.
Skill Claude CodeCodex
Designs Rust command-line interfaces that are reliable for agents, scripts, and humans. Use when building or reviewing Rust binaries, clap command trees, diagnostics commands, codegen tools, or automation-facing workflows.
Skill Claude CodeCodex
Identifies and fixes common Rust anti-patterns. Use during code review, when seeing excessive clones/unwraps/index loops, or when code fights the borrow checker instead of working with it.
Skill Claude CodeCodex
50 core Rust coding conventions covering naming, data types, strings, error handling, memory, concurrency, async, and modern crate recommendations. Use when reviewing code style or setting up project conventions.
Skill Claude CodeCodex
Guides concurrency and async decisions in Rust. Use when encountering Send/Sync errors (E0277), choosing between threads vs async, designing shared state, or debugging deadlocks.
Skill Claude CodeCodex
Guides Rust error handling strategy. Use when choosing between Result/Option/panic, using anyhow vs thiserror, propagating errors with ?, or designing custom error types.
Skill Claude CodeCodex
Guides ownership, borrowing, and lifetime decisions in Rust. Use when encountering E0382, E0597, E0506, E0507, move errors, or when designing data ownership.
Skill Claude CodeCodex
Guides Rust performance optimization. Use when profiling, benchmarking, reducing allocations, improving cache locality, choosing between rayon/async/threads, or applying SIMD/parallelism.
Cursor rule Cursor
Definitive guidelines for writing idiomatic, performant, and maintainable Rust code, focusing on modern best practices for structure, patterns, and error handling.
Skill Claude CodeCodex
Guides type-driven design in Rust. Use when encoding invariants in types, applying newtype pattern, implementing type state machines, using PhantomData, or making invalid states unrepresentable.
Skill Claude CodeCodex
Guides generic vs trait object decisions in Rust. Use when choosing between static and dynamic dispatch, designing traits, handling E0277/E0038, or deciding between enum and dyn Trait.
Skill Claude Code
End-to-end Solana development playbook (Jan 2026). Prefer Solana Foundation framework-kit (@solana/client + @solana/react-hooks) for React/Next.js UI. Prefer @solana/kit for all new client/RPC/transaction code. When legacy dependencies require web3.js, isolate it behind @solana/web3-compat (or @solana/web3.js as a…
Skill Claude CodeCodex needs its repo
Turborepo monorepo build system guidance. Triggers on: turbo.json, task pipelines, dependsOn, caching, remote cache, the "turbo" CLI, --filter, --affected, CI optimization, environment variables, internal packages, monorepo structure/best practices, and boundaries. Use when user: configures tasks/workflows/pipelines…
Skill Claude CodeCodex needs its repo
Enforces modern TypeScript best practices for type-safe code, strict configuration, runtime validation, and clear type contracts. Use when writing or reviewing TypeScript/JavaScript code, configuring tsconfig.json, or when the user asks for TypeScript style guidance.
Skill Claude CodeCodex
Whole-repo audit for over-engineering. Like ponytail-review, but scans the entire codebase instead of a diff: a ranked list of what to delete, simplify, or replace with stdlib/native equivalents. Use when the user says "audit this codebase", "audit for over-engineering", "what can I delete from this repo", "find…
Skill Claude CodeCodex
Harvest every ponytail: comment in the codebase into a debt ledger, so the deliberate shortcuts and deferrals ponytail leaves behind get tracked instead of rotting into "later means never". Use when the user says "ponytail debt", "/ponytail-debt", "what did ponytail defer", "list the shortcuts", "ponytail ledger", or…
Skill Claude CodeCodex
Show ponytail's measured impact as a compact scoreboard: less code, less cost, more speed, from the benchmark medians. One-shot display, not a persistent mode, and not a per-repo number. Trigger: /ponytail-gain, "ponytail gain", "what does ponytail save", "show ponytail impact", "ponytail scoreboard".
Skill Claude Code
Quick-reference card for all ponytail modes, skills, and commands. One-shot display, not a persistent mode. Trigger: /ponytail-help, "ponytail help", "what ponytail commands", "how do I use ponytail".
Skill Claude CodeCodex
Code review focused exclusively on over-engineering. Finds what to delete: reinvented standard library, unneeded dependencies, speculative abstractions, dead flexibility. One line per finding: location, what to cut, what replaces it. Use when the user says "review for over-engineering", "what can we delete", "is this…
Skill Claude CodeCodex
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…
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