npm / @effect/platform-bun

@effect/platform-bun

What changed in @effect/platform-bun 0.91 to 4, from its official release notes, upgrade guides and advisories. Sources checked 2026-10-20.

3 breaking1 security8 new APIs and options1 behavior and defaults8 fixes and other

See which of these apply to your code, ranked, in your agent:

npx @unstale/cli init

@effect/platform-bun 417 changes

Default redacted names AWSAccessKeyId, Signature, sig, and X-Goog-Signature move from Headers.CurrentRedactedNames to UrlParams.CurrentRedactedNames; a custom list replaces these defaults.
4.0.5release notes
Esc now ends terminal key input by default and cancels CLI prompts with Terminal.QuitError; pass a shouldQuit predicate to make to keep Esc non-cancelling.
4.0.3release notes
Server WebSockets now close with code 1000 on success, 1001 on interruption, or 1011 on failure, while preserving explicit close codes.
4.0.0release notes

Sensitive query values and URL credentials are redacted in HTTP spans, request inspection, and error messages; URLs sent over the wire are unchanged.
4.0.5release notes

Adds an API for checking whether a URL parameter name is redacted.
4.0.5release notes
Adds an API for explicit redaction of URL parameter values.
4.0.5release notes
Adds an API for explicitly redacting URLs.
4.0.5release notes
Adds UDP socket support on Bun.
4.0.3release notes
Adds a helper for name server inputs in the platform Dns services.
4.0.3release notes
Node and Bun WebSocket clients can send handshake headers alongside subprotocols through socket constructors, channels, and layers.
4.0.3release notes

Every module and directly importable export now has an explicit stability tag; stable follows strict semver, while unstable may receive breaking changes in minor releases.
4.0.2release notes

When self.close is unavailable, Bun worker finalizers now complete before exit.
4.0.3release notes
Accepts address inputs.
4.0.3release notes
Server middleware such as HttpMiddleware.logger and HttpMiddleware.tracer now reports status 101 for a successful WebSocket upgrade instead of the handler's discarded response status.
4.0.2release notes
Readers no longer throw when a pull is interrupted or its scope closes during a read; consumed bytes are preserved in order across interruption and normal EOF, and discarded when the reader scope closes.
4.0.1release notes
The Bun package provides the platform Crypto service.
4.0.0release notes
HTTP request scopes retain the handler's failure exit through response handling and middleware.
4.0.0release notes

Cluster RPC serialization buffer limits can now be configured.
0.91.2release notes
Adds the extendEnv option for spawning commands with a clean environment.
0.91.1release notes

WebSocket compression now preserves options and compresses outgoing messages.
0.91.3release notes
Server WebSockets now close with code 1001 (Going Away) instead of 1011 when the handler fiber is only interrupted.
0.91.3release notes