v4.0.0

Breaking Changes

• ESM-only — CJS require() is no longer supported. Consumers must use import.
• TypeScript 6.0 — Upgraded from TypeScript 5.x to 6.0.2.

Changed

• NodeNext module resolution — .js extensions on all relative imports, strict Node module semantics.
• Build with tsc instead of tsup — plain tsc compiles directly to a flat dist/ directory. Removes tsup + 78 transitive dependencies.
• undici is now a regular dependency — prevents ERR_MODULE_NOT_FOUND for Node consumers. Browser/Deno/Bun entry points never load it.
• Flat dist/ layout — output moved from dist/node/, dist/browser/, dist/fetch/ to a single dist/.
• Added workerd and edge-light export conditions — Cloudflare Workers and Vercel Edge Functions support.
• Removed legacy main, browser, and react-native top-level fields — exports map is the sole resolution mechanism.

Removed

• CJS output
• tsup dependency (78 transitive deps removed)
• Unused picomatch and brace-expansion devDependencies

Fixed

• Export AptosClientRequest, AptosClientResponse, and CookieJarLike types from all entry points.
• Export Cookie type from Node and fetch entry points.

See CHANGELOG.md for full details.