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Claude Code Guidelines

About

A TypeScript library and CLI for generating, converting, and manipulating CSV and Excel spreadsheets. It provides a fluent API via createSpreadsheet() and spreadsheet() functions to generate content, store files to disk, or create download Response objects. The CLI supports creating spreadsheets from JSON input, converting between CSV and Excel formats, and validating input. The library is dependency-free, fully typed, and performant.

Linting

  • Use pickier for linting — never use eslint directly
  • Run bunx --bun pickier . to lint, bunx --bun pickier . --fix to auto-fix
  • When fixing unused variable warnings, prefer // eslint-disable-next-line comments over prefixing with _

Frontend

  • Use stx for templating — never write vanilla JS (var, document.*, window.*) in stx templates
  • Use crosswind as the default CSS framework which enables standard Tailwind-like utility classes
  • stx <script> tags should only contain stx-compatible code (signals, composables, directives)

Dependencies

  • buddy-bot handles dependency updates — not renovatebot
  • better-dx provides shared dev tooling as peer dependencies — do not install its peers (e.g., typescript, pickier, bun-plugin-dtsx) separately if better-dx is already in package.json
  • If better-dx is in package.json, ensure bunfig.toml includes linker = "hoisted"

Commits

  • Use conventional commit messages (e.g., fix:, feat:, chore:)