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## Summary - Adds `AbortSignal` support to `BetaToolRunner` for cancelling API calls and tool execution - Introduces `BetaToolRunContext` type passed to `tool.run()` with `signal` and `toolUseBlock` - Adds `setRequestOptions()` method for updating signal/headers after runner creation ## Context Picks up the design from #877 (which was approved but stalled), adapted to the current codebase. Multiple users have requested the ability to cancel tool runner operations. The signal flows through: 1. Constructor options or `setRequestOptions()` → stored in `#options` 2. `#options` passed to API calls (`messages.create`/`messages.stream`) 3. `generateToolResponse(signal?)` → `tool.run(input, { toolUseBlock, signal })` Tools can check `context?.signal?.aborted` or pass the signal to downstream operations like `fetch()`. ## Test plan - [x] `./scripts/build` passes - [x] `./scripts/test -- tests/lib/tools/ToolRunner.test.ts` — 5 new tests - [x] Signal + toolUseBlock passed to tool.run via constructor options - [x] Undefined signal when none provided - [x] `setRequestOptions()` with direct object - [x] `setRequestOptions()` with mutator function - [x] Documentation updated in helpers.md --------- Co-authored-by: Felix Becker <felix@anthropic.com> Co-authored-by: stainless-app[bot] <142633134+stainless-app[bot]@users.noreply.github.com> Co-authored-by: Mike Cluck <mcluck90@gmail.com>
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packyg
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✨ Stainless prepared a new release
sdk: 0.84.0
0.84.0 (2026-04-07)
Full Changelog: sdk-v0.83.0...sdk-v0.84.0
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