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Claude Code v2.1.268 ·

Interrupted turns now report a resume_reason across streaming, SDK results, and resumed prompts

Claude Code now explains why an interrupted turn is being automatically resumed, and links it to the original turn

Group of 3 Use it now Notable New Features
JSON All of v2.1.268
Use it nowTier: how much it should matter to you
4Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
StreamingArea: what it touches
New FeaturesKind: in v2.1.268,
What probably matters to youSection of the release

What

  • Streaming partial-message frames can now carry a resume_reason field explaining why the current turn is an automatic re-run of one interrupted by a worker restart: host_draining, checkpoint_restore, container_recreated, or a fallback interrupted_turn. This ties to the CLAUDE_CODE_RESUME_INTERRUPTED_TURN / CLAUDE_CODE_RESUME_REASON mechanism.
  • The SDK/headless turn-result schema gains the same optional resume_reason string, plus an optional result_index integer, in both the streamed and final result message shapes.
  • When Claude Code auto-resumes an interrupted turn at session restart, the reconstructed prompt now includes a resumeReason and, when available, a resumedTurnUserMessageUuid pointing back to the original interrupted turn's user message.

Why This makes it clear, both in the UI/streaming output and in SDK results, why a turn was automatically re-run after an interruption (such as the worker host draining or a container being recreated), and links the resumed turn back to the original one it replaced.

Read from
Names in the bundleresume_reasonCLAUDE_CODE_RESUME_INTERRUPTED_TURNCLAUDE_CODE_RESUME_REASON
What the documentation says
Documented inclaude-code/agent-sdk/typescript
Since it was published

The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.

Added since A small documentation edit on Agent SDK reference - TypeScript touched a line naming resume_reason after this was published. * `resume_reason`: why Claude Code re-ran this turn after a restart interrupted it. Present on both arms. See [`resume_reason`](#resume_reason). agent-sdk/typescript see the edit
Confirmed since Anthropic's documentation has since written up resume_reason, on Agent SDK reference - TypeScript. resume_reason?: string; agent-sdk/typescript see the edit
Added since A small documentation edit on Manage sessions touched a line naming CLAUDE_CODE_RESUME_INTERRUPTED_TURN after this was published. * Conversation history: the full history, including tool calls and results. A tool that was still running when the previous process ended, for example in a crash, doesn't finish or run again when you resume. Claude sees the call marked as … sessions see the edit
Confirmed since Anthropic's documentation has since written up CLAUDE_CODE_RESUME_INTERRUPTED_TURN, on Claude Code changelog. * Fixed `CLAUDE_CODE_RESUME_INTERRUPTED_TURN` re-running a turn that had failed with an API error over 6 hours earlier, or longer ago than `CLAUDE_CODE_RESUME_INTERRUPTED_TURN_MAX_AGE_MS` when set changelog see the edit
How sure we are
Two sources agreeTwo things we can check say the same as this entry.
Anthropic's documentation agreesAnthropic's documentation has since written up CLAUDE_CODE_RESUME_INTERRUPTED_TURN, on Claude Code changelog.
The name it cites is new in this buildNew in this build: CLAUDE_CODE_RESUME_REASON

See this entry in the whole of v2.1.268 →

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