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Claude Code Guidelines

About

A fast, dependency-free XML parser, builder, and validator for TypeScript and Bun. It uses character-by-character charCodeAt parsing for maximum performance (3-6x faster than fast-xml-parser in benchmarks). Key classes are XMLParser (XML to JS objects), XMLBuilder (JS objects to XML), and XMLValidator (structure validation with error reporting). It supports namespace handling, entity decoding, CDATA/comments, processing instructions, preserve-order mode, stop nodes, unpaired tags, and custom value/tag transformation callbacks.

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:)