feat(Chat): interrupt agent execution#39
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remarkablemark merged 7 commits intomasterfrom May 9, 2026
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Pressing Esc or Ctrl+C while the agent is streaming or executing a tool
cancels the in-flight operation, commits any partial assistant content
already accumulated, shows a UI-only interrupt notice, injects a
user-role `turn_aborted` message into history, and returns to the idle
input state.
Two things happen on interrupt:
1. **UI notice** (display-only, not in history):
> `❗ Execution interrupted.`
> Rendered via a transient `wasInterrupted` boolean state; disappears on next submit.
2. **History injection** (model sees it, as a `user` role message):
```
<turn_aborted>
The user interrupted the previous turn on purpose. Any running commands may still be running in the background. If any tools were aborted, they may have partially executed.
</turn_aborted>
```
Appended to `messages` state so the model knows not to assume success.
In `handleToolApproval` `DECISION.REJECT` case: replace the current
`system`-role `"User declined to execute tool {name}"` message with a
`user`-role `<turn_aborted>` message (same text as the interrupt).
Rejecting a tool call now displays a rejection message and returns directly to idle — no re-stream, no repeated approval prompt.
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What is the motivation for this pull request?
Implement interrupt functionality during agent/tool execution, similar to other TUIs.
What is the current behavior?
There is no way to cancel a running stream or reject a tool call and return to idle.
What is the new behavior?
AbortSignaland shows❗ Execution interrupted.❗ Tool call rejected.instead of re-streaming<turn_aborted>user-role message is injected into history on both interrupt and rejection so the model has context, but it is filtered from the UIMessagesmoved to its ownsrc/components/Messages/directory with aconstants.tsforTURN_ABORTED_MESSAGEexternallist removed — Vite SSR mode auto-externalises all dependenciesChecklist: