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Version 4.0.0-beta.12

Patch Changes

  • #1439 70a74e8 Thanks @gcanti! - Add Config.nested combinator to scope a config under a named prefix, closes #1437.

  • #1452 b5b6e10 Thanks @tim-smart! - make fiber keepAlive setInterval evaluation lazy

  • #1431 f5ce5a9 Thanks @tim-smart! - Add Random.nextBoolean for generating random boolean values.

  • #1450 a29eb70 Thanks @tim-smart! - use cause annotations for detecting client aborts

  • #1445 c7b36e5 Thanks @mattiamanzati! - Fix Graph.toMermaid to escape special characters using HTML entity codes per the Mermaid specification.

  • #1443 9381d6d Thanks @mikearnaldi! - Fix HttpClient.retryTransient autocomplete leaking Schedule internals by splitting the {...} | Schedule union into separate overloads.

  • #1444 88439f1 Thanks @gcanti! - Schema.encodeKeys: relax input constraint from Struct to schemas with fields so Schema.Class works, closes #1412.

  • #1438 e35307d Thanks @mikearnaldi! - Atom.searchParam: decode initial URL values correctly when a schema is provided

  • #1425 c7df4bc Thanks @candrewlee14! - Fix LanguageModel stripping of resolved approval artifacts across multi-round conversations.

    Previously, stripResolvedApprovals only ran when there were pending approvals in the current round. Stale artifacts from earlier rounds would leak to the provider, causing errors. The stripping now runs unconditionally.

    In streaming mode, pre-resolved tool results are also emitted as stream parts so Chat.streamText persists them to history, preventing re-resolution on subsequent rounds.

  • #1453 accaf3b Thanks @tim-smart! - allow mcp errors to be encoded correctly

  • #1440 3e1c270 Thanks @lloydrichards! - extend McpSchema to work with extensions

  • #1447 6cd81f7 Thanks @tim-smart! - remove all non-regional service usage

  • #1451 f222da3 Thanks @tim-smart! - Add Effect.annotateLogsScoped to apply log annotations for the current scope and automatically restore previous annotations when the scope closes.

  • #1434 61f901d Thanks @tim-smart! - Fix JSON-RPC serialization to return an object for non-batched requests while preserving array responses for true batch requests.