Tooling Prompts

# TypeScript library taste
- Use pnpm as the package manager. Confidence: 0.95
- Enable strict mode and noUncheckedIndexedAccess in tsconfig. Confidence: 0.95
- Build with tsup and emit both ESM and CJS with .d.ts files. Confidence: 0.90
- Declare the exports map in package.json instead of relying on main. Confidence: 0.90
- Test with vitest and keep tests next to source as *.test.ts. Confidence: 0.90
- Use Changesets for versioning and changelogs. Confidence: 0.85
- Lint and format with Biome instead of ESLint plus Prettier. Confidence: 0.70
- Keep runtime dependencies at zero where practical. Confidence: 0.85
- Mark the package with "sideEffects": false to enable tree shaking. Confidence: 0.85
- Prefer named exports over default exports. Confidence: 0.90
- Validate untrusted input with zod and infer types from the schemas. Confidence: 0.80
- Run publint and arethetypeswrong in CI before every release. Confidence: 0.80
- Use type-only imports (import type) for types. Confidence: 0.85
- Publish with npm provenance enabled from GitHub Actions. Confidence: 0.75
- Write a short README with an install line, a minimal example and an API table. Confidence: 0.90
- Start versions at 0.1.0 and follow semver strictly once stable. Confidence: 0.70

# Python Packaging taste
- Use `pyproject.toml` as the single source of truth and drop `setup.py` for new packages. Confidence: 0.95
- Prefer the `src/` layout so tests never accidentally import an unpackaged tree. Confidence: 0.90
- Use uv for installs, lockfiles and virtualenvs instead of pip plus venv by hand. Confidence: 0.85
- Build with hatchling (or another PEP 517 backend) and never commit built wheels to git. Confidence: 0.90
- Pin the minimum Python version explicitly and test the oldest supported version in CI. Confidence: 0.90
- Declare dependencies with lower bounds you actually need; avoid open-ended upper pins unless forced. Confidence: 0.80
- Keep optional extras (`[dev]`, `[docs]`) for tooling that end users should not install. Confidence: 0.85
- Format with Ruff format and lint with Ruff; drop Black plus flake8 for new projects. Confidence: 0.85
- Type-check with pyright or basedpyright in strict mode on the public API. Confidence: 0.80
- Test with pytest and keep tests outside `src/` under `tests/`. Confidence: 0.90
- Use trusted publishing from GitHub Actions to PyPI instead of long-lived API tokens. Confidence: 0.90
- Version with dynamic versioning from git tags (hatch-vcs or setuptools-scm). Confidence: 0.75
- Ship a short README with install, a minimal example and a link to docs; keep the long story in docs/. Confidence: 0.90
- Include `py.typed` when you publish typed packages so consumers get inline types. Confidence: 0.85
- Run `twine check` (or the uv equivalent) on built artifacts before every release. Confidence: 0.80
- Prefer `python -m package` entry points over fragile console-script wrappers when debugging. Confidence: 0.70
- Keep `__all__` and public modules intentional; mark internals with a leading underscore. Confidence: 0.80

# Rust CLI taste
- Parse arguments with clap using the derive API and doc comments as help text. Confidence: 0.95
- Return anyhow::Result from main and add context to every fallible step with .context(). Confidence: 0.90
- Define library error types with thiserror and keep anyhow in the binary only. Confidence: 0.85
- Split the crate into a thin main.rs and a lib.rs that holds the real logic for testing. Confidence: 0.85
- Write normal output to stdout and logs, progress and errors to stderr. Confidence: 0.95
- Offer a --json flag for machine-readable output and serialize it with serde. Confidence: 0.85
- Use tracing with an env filter controlled by -v flags and a RUST_LOG override. Confidence: 0.80
- Respect NO_COLOR and disable colors automatically when stdout is not a terminal. Confidence: 0.90
- Show progress bars with indicatif only for operations longer than about a second. Confidence: 0.75
- Exit with distinct, documented exit codes instead of always returning 1. Confidence: 0.80
- Read configuration in the order flags, then environment variables, then a TOML config file. Confidence: 0.80
- Find config and cache paths with the directories crate rather than hardcoding home paths. Confidence: 0.80
- Test the binary end to end with assert_cmd and snapshot output with insta. Confidence: 0.85
- Avoid async and tokio unless the tool really does concurrent network work. Confidence: 0.75
- Generate shell completions and a man page with clap_complete and clap_mangen at build time. Confidence: 0.75
- Ship prebuilt binaries for Linux, macOS and Windows with cargo-dist from GitHub Actions. Confidence: 0.80
- Run cargo clippy with warnings denied and cargo fmt --check in CI. Confidence: 0.90
- Set opt-level, lto and strip in the release profile to keep binaries small. Confidence: 0.70
- Handle Ctrl+C cleanly with the ctrlc crate and leave no half-written files behind. Confidence: 0.80

# Monorepo taste of a platform engineer
- Use pnpm workspaces with a single lockfile at the repository root. Confidence: 0.95
- Put deployable apps in apps/ and shared libraries in packages/. Confidence: 0.90
- Orchestrate tasks with Turborepo and enable remote caching in CI. Confidence: 0.85
- Reference internal packages with the workspace:* protocol. Confidence: 0.90
- Scope every internal package name under one npm scope such as @acme/. Confidence: 0.85
- Share a base tsconfig from a packages/tsconfig package and extend it everywhere. Confidence: 0.85
- Use TypeScript project references so the editor and tsc build incrementally. Confidence: 0.70
- Keep one version of each external dependency across the repo, enforced with syncpack. Confidence: 0.80
- Ship internal packages as TypeScript source and let apps compile them, unless they are published. Confidence: 0.75
- Version and publish public packages with Changesets. Confidence: 0.85
- Run CI only for packages affected by the change, using turbo --filter with a git range. Confidence: 0.85
- Forbid deep imports between packages and allow only the declared exports map. Confidence: 0.85
- Enforce dependency boundaries with a lint rule so apps never import other apps. Confidence: 0.90
- Keep the root package.json free of runtime dependencies. Confidence: 0.80
- Assign owners per directory with a CODEOWNERS file. Confidence: 0.80
- Pin the Node.js and pnpm versions with .nvmrc and the packageManager field. Confidence: 0.90
- Prefer one root lint and format config over a copy in every package. Confidence: 0.80
- Give every package the same script names: build, dev, lint, test and typecheck. Confidence: 0.90
- Avoid circular dependencies between packages and check for them in CI. Confidence: 0.85
- Split a package out only when a second consumer actually needs it. Confidence: 0.75

# Vite Frontend Tooling taste of a fast-feedback web developer
- Start new single-page apps and component playgrounds on Vite with the official framework plugin instead of a custom webpack setup. Confidence: 0.85
- Keep `vite.config.ts` in TypeScript with `defineConfig`, and keep it short enough to read in one screen. Confidence: 0.80
- Run type checking separately with `tsc --noEmit` in CI and in a watcher, since Vite only strips types and never checks them. Confidence: 0.95
- Use path aliases sparingly, define them once in `tsconfig.json`, and mirror them in Vite with a plugin such as `vite-tsconfig-paths`. Confidence: 0.75
- Expose only `VITE_`-prefixed environment variables to client code and never put secrets in them. Confidence: 0.95
- Type `import.meta.env` in a `vite-env.d.ts` file so missing or misspelled variables fail at compile time. Confidence: 0.80
- Configure the dev server proxy for backend APIs instead of enabling permissive CORS on the backend just for local development. Confidence: 0.85
- Use Vitest for unit and component tests so tests share the same config, transforms and aliases as the app. Confidence: 0.90
- Lazy-load routes and heavy widgets with dynamic `import()` and let Rollup split chunks, rather than hand-tuning `manualChunks` early. Confidence: 0.80
- Inspect bundle size with `rollup-plugin-visualizer` before releases and treat a large new dependency as a review topic. Confidence: 0.75
- Import assets through the module graph so they get hashed file names, keeping `public/` for files that need fixed URLs like `robots.txt`. Confidence: 0.85
- Set an explicit `build.target` that matches the browsers you support, instead of relying on the default. Confidence: 0.70
- Generate source maps for production builds and upload them to your error tracker rather than serving them publicly. Confidence: 0.80
- Prefer native CSS features and CSS modules or Tailwind over heavy CSS-in-JS runtimes in Vite projects. Confidence: 0.70
- Keep the plugin list small and remove plugins that duplicate built-in features such as JSON imports or CSS handling. Confidence: 0.80
- Use `vite preview` to smoke-test the production build locally before deploying, since dev and build use different pipelines. Confidence: 0.85
- Pin Vite and plugin versions in the lockfile and upgrade them together, reading the migration guide for major versions. Confidence: 0.85
- Use library mode with `vite build --lib` plus a declaration generator when publishing a component package, and mark peer dependencies as external. Confidence: 0.75
- Fix slow cold starts by checking `optimizeDeps` and large barrel files before blaming Vite itself. Confidence: 0.70
- Fail CI on build warnings about circular imports or missing exports instead of letting them pile up. Confidence: 0.65

# Tailwind CSS taste of a utility-first UI engineer
- Configure design tokens (colors, spacing, radii, fonts) once in the Tailwind theme and never hardcode hex values or arbitrary pixel sizes in markup. Confidence: 0.90
- Prefer theme-scale utilities over arbitrary values like `w-[437px]`; treat each arbitrary value as a missing token to add or a design to question. Confidence: 0.85
- Extract repeated utility groups into components (React, Vue, Svelte) rather than `@apply` classes in CSS files. Confidence: 0.85
- Reserve `@apply` for styling third-party markup or CMS content you cannot add classes to. Confidence: 0.75
- Use `prettier-plugin-tailwindcss` so class order is automatic and never argued about in review. Confidence: 0.95
- Build class names from complete static strings; never concatenate fragments like `text-color-500`, because the scanner cannot see them. Confidence: 0.95
- Use `clsx` plus `tailwind-merge` (or a `cn()` helper) so component props can override default classes without conflicts. Confidence: 0.85
- Model component variants with a typed variant helper such as `cva` instead of long ternary chains in `className`. Confidence: 0.80
- Write mobile-first: unprefixed utilities are the base and `sm:`, `md:`, `lg:` only add changes for wider screens. Confidence: 0.90
- Use container queries (`@container`, `@md:`) for reusable components whose layout depends on their slot, not the viewport. Confidence: 0.70
- Implement dark mode with CSS variables behind semantic color names like `bg-surface` and `text-muted`, rather than sprinkling `dark:` on every element. Confidence: 0.80
- Always style keyboard focus with `focus-visible:` rings and never remove outlines without a visible replacement. Confidence: 0.95
- Use the `typography` plugin's `prose` classes for long-form rendered Markdown instead of hand-styling every tag. Confidence: 0.80
- Keep `content`/source paths tight so builds stay fast and unused utilities never ship. Confidence: 0.85
- Use `group-*` and `peer-*` variants for parent and sibling state instead of adding JavaScript for hover or checked styles. Confidence: 0.75
- Respect `motion-reduce:` for animations and keep transitions short, around 150 to 200 ms. Confidence: 0.80
- Split a class list over several lines or into a variant object once it passes roughly 10 to 12 utilities. Confidence: 0.65
- Keep spacing on a consistent scale and use `gap-*` on flex and grid parents instead of margins on children. Confidence: 0.85
- Avoid `!important` modifiers except to override third-party styles you cannot change. Confidence: 0.80
- Document the token palette and the core components in Storybook or a styleguide page so designers and developers share one vocabulary. Confidence: 0.70