Development skills

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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Guidelines for upgrading Expo SDK versions and fixing dependency issues

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Set up local iOS dev/build tooling for NowStack Mobile: Xcode, Simulator, CocoaPods, Watchman, mobile deps, and first `expo run:ios`. Use for `/ns ios local-setup`, legacy `/ns setup-ios`, simulator preview, or local TestFlight prerequisites. macOS only; signing is `/ns ios setup`.

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Read and write the user's SaveIt.now bookmarks from the terminal or from JS/TS code, via the official `saveitnow` npm package (CLI + SDK). Handles its own install and API-key setup on first use. Use whenever the user mentions SaveIt, saveit.now, "my bookmarks", "my saved links", "my reading list", asks to save/bookmark a URL, to search what they saved, or to pick something to read.

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Creates or adds Convex to an app. Use for new Convex projects, npm create convex@latest, frontend setup, env vars, or the first npx convex dev run.

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First-run setup wizard for a freshly cloned NowStack Mobile. Installs the machine's CLIs, connects every account, wires Convex, creates YOUR own clean Git repo, gathers the product brief, then rebrands the boilerplate into your app. Use for "set up my project", "initial setup", "onboard me", "ns onboard", "I just cloned this", or the very first run.

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Connect every external account NowStack Mobile needs (Convex, Expo/EAS, Apple Developer, Vercel, Stripe, Google Play) by acquiring PROGRAMMATIC API ACCESS for each, then doing everything automatically through that access. Use for "setup accounts", "connect my accounts", first-run onboarding, or when check-setup reports CLI/auth gaps. The skill obtains a token/key per service, stores it in the right place, and only asks the user for the irreducible manual steps (browser signup, 2FA, one-time key download). Every account is skippable.

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Build reusable Convex components with isolated tables and app-facing wrappers. Use for defineComponent, app.use, ComponentApi, or shared backend modules.

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Use when optimizing Convex database read bandwidth, documents-read cost, query indexes, full-table scans, function-level usage dashboard findings, or code that uses .filter(), unbounded .collect(), N+1 reads, or expensive reactive Convex queries.

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Build with DeepSeek Coder — open code models with strong reasoning and long-context code understanding.

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Build with DeepSeek's models — efficient open-weight reasoning models and low-cost API inference.

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Screening for drug-drug interactions — mechanistic prediction, database checks, and clinical risk assessment.

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Program language models instead of prompting them — DSPy signatures, modules, and optimizers that tune prompts automatically.

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Read, write, and debug cron expressions with field reference, scheduling logic, and common patterns.

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Systematic debugging: reproduce, isolate, hypothesize, verify — with tooling for hard bugs. Use when stuck on a bug, flaky failure, or production incident.

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Idiomatic Dart: null safety, async, Flutter-ready patterns, packages, and tooling. Use when writing, reviewing, or structuring Dart code (Flutter or server/CLI).

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Idiomatic modern C++: RAII, smart pointers, move semantics, value semantics, STL algorithms, and safe concurrency. Use when writing, reviewing, or structuring C++ code.

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Get productive with agentic coding assistants — task framing, iterative prompting, file-scoped workflows, review loops, and multi-file refactors. Use when pairing with an AI coding agent on real codebases.

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Professional code review craft: review strategy, feedback that lands, reviewer efficiency, and team review culture. Use when reviewing code or improving a team's review process.

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Build with Meta's Code Llama — open code models for generation, infilling, and long-context code tasks.

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Structured code review discipline: correctness, design, readability, and security checks with actionable feedback. Use when reviewing diffs, PRs, or code snippets before merge or after writing.

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Write readable, maintainable code: naming, small functions, clear control flow, and honest abstractions. Use when writing new code, refactoring, or reviewing for readability.

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Build with Mistral's Codestral code models — efficient open code generation with fill-in-the-middle.

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Ship iOS/Android apps with Capacitor: web codebase, native plugins, live updates, and store builds. Use when wrapping a web app as native mobile apps.

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