@effect/platform-bun@4.0.5 @effect/platform-deno@4.0.5

medium risk

Effect-TS/effectOct 15, 2026 → Oct 15, 20260 days between releases

What's New

Bun release adds security redaction for AWS credentials, while Deno release adds Path.resolveWithin and fixes filesystem metadata handling

Breaking Changes

  • Moved AWS signature headers from Headers.CurrentRedactedNames to UrlParams.CurrentRedactedNames in Bun
  • Changed FileSystem.File.Info.dev type from number to bigint in Deno

New Features

  • Added Path.resolveWithin(root, input) utility in Deno
  • Added UrlParams.redact, UrlParams.redactUrl, and UrlParams.isRedactedName in Bun

Improvements

  • Improved security by redacting URL credentials and AWS signature headers in Bun
  • Improved filesystem metadata handling to prevent safe integer range errors in Deno

Bug Fixes

  • Fixed DenoSocket dying when a writer is released after connection closed in Deno
  • Fixed FileSystem.watch to prefer caller-provided backend in Deno

Upgrade Notes

If upgrading Bun, verify custom redaction lists are updated to use the new UrlParams location. If upgrading Deno, update type definitions for FileSystem.File.Info.dev to expect a bigint.

The Two Releases

@effect/platform-bun@4.0.5

@effect/platform-bun@4.0.5

Oct 15, 2026· 7 days ago

Security update to align with the core Effect 4.0.5 and platform-node-shared 4.0.5 versions.

Full release notes
@effect/platform-deno@4.0.5

@effect/platform-deno@4.0.5

Oct 15, 2026· 7 days ago

Multiple bug fixes and feature additions for the Deno platform layer, including improvements to file system metadata handling and path resolution.

Full release notes