TypeScript Library taste

# 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