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Start a new Muse turn when an admitted steer is dropped - #1549
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Muse acks a steer into a turn that is winding down and then rejects it in its own log (turn_submit.rejected, already_terminal) without telling the client, so the ack cannot stand for delivery. Only the user-message item carrying the steer's command id does; a turn that ends first dropped the input. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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Check name Status Explanation Description Check Check skipped - CodeRabbit’s high-level summary is enabled. Title check The title clearly and concisely describes the main change: starting a new Muse turn when an admitted steer is dropped. Linked Issues check Check skipped because no linked issues were found for this pull request. Out of Scope Changes check Check skipped because no linked issues were found for this pull request.
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PR Summary by QodoStart a new Muse turn when an admitted steer is dropped
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Review comments at
@src/Capacitor.Cli.Daemon/Harness/Muse/MuseMspHostedAgentRuntime.cs:
- Around line 708-723: Update the steer fallback in MuseMspHostedAgentRuntime so
it retries via a new turn only when the host capability or version guarantees
that a matching item notification arrives before turn completion. For hosts
without that guarantee, treat steer acknowledgment as delivered and do not
return false to DeliverAsync, avoiding duplicate delivery or a failed turn/start
after terminal cleanup.
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📒 Files selected for processing: 2
src/Capacitor.Cli.Daemon/Harness/Muse/MuseMspHostedAgentRuntime.cstest/Capacitor.Cli.Daemon.Tests.Unit/Harness/Muse/MuseMspHostedAgentRuntimeTests.cs
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The wait tracks the steered turn rather than session idleness, so a next turn already running cannot hold the input; the idle waiter is cancelled when the wait ends; and the fallback to a new turn needs a host that has echoed a user-message item before, since a host that never shows one leaves the ack as the only evidence and a second turn could run the input twice. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
A next turn announced before the steered turn's completion would otherwise leave the wait on the old turn unreleased, since completion only clears the turn that is still current. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
This was referenced Oct 19, 2026
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AI-3891 (no GitHub issue)
What & why
A hosted Muse participant never ran a second flow round: the daemon steered the input into a turn that was still winding down, Muse acked the steer and then rejected the submission in its own log (
turn_submit.rejected,already_terminal) without telling the client, so the runtime took the ack for delivery and never fell back toturn/start. The steer now counts as delivered only once a user-message item carrying its command id appears; if the turn ends first, the same text starts a new turn.Where to look
MuseMspHostedAgentRuntime.SteerAsync: an admitted steer that is neither taken nor outlived withinSteerFallbackCapis reported delivered, as an unanswered request already was, so a host that never emits user-message items cannot run an input twice.Verification
dotnet run --project test/Capacitor.Cli.Daemon.Tests.Unit -- --treenode-filter "/*/*/MuseMspHostedAgentRuntimeTests/*": 67 passed. The two new dropped-steer tests fail against the previous runtime atAssert.That(second.IsCompleted).IsFalse()(the input completed on the ack). Reproduced live on kcap 1.3.0-beta.9 / Muse 1.4.10: flow139175dfe27f402abe09afffa298ac34round 2 timed out with no second prompt in the participant's session.🤖 Generated with Claude Code
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