🤖 bug: a resume refused by the mutation gate can still accept a pending compaction replacement (#5400 follow-up)

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#5,434 2 comentarios 0 reacciones 0 asignados Ver en GitHub

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Evaluación

Dificultad
4/5
Tiempo estimado
3-5 días
Aptitud para principiantes
48/100
Tipo de issue
Error
Claridad
Bastante claro
Estado de actividad
Activo
Stack tecnológico
typescript

Línea de trabajo

Start at AgentSession.streamWithHistory and trace acceptCompactionReplacement, the turn use lease confirmation, and the current refusal point. Check the formal/compaction model plus the retirement and witness handling that follows acceptance; done means a refused lease causes no replacement acceptance while preserving retry correlation and valid history.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

backlog

Problem

Follow-up from #5400 / #5419. In AgentSession.streamWithHistory, a resume that carries a pending compaction replacement (preparation.resumeReplacement) accepts that replacement (acceptCompactionReplacement, a history rewrite) before the turn use lease is confirmed. If another backend's structural mutation gate refuses the lease, the resume fails afterwards, but the compaction replacement has already been committed to history.

The impact is history-only: no checkout work runs and no turn starts. The accepted replacement is the compaction protocol's own outcome, so the history stays valid. It is still a history write made by a resume that was then refused, which is the class #5400 closed for the [CONTINUE] sentinel.

Possible fix

Confirm the turn lease before the replacement acceptance, and keep the refusal at its current failure point so retry correlation does not change. Check this against the compaction model (formal/compaction) and the retirement/witness handling that follows acceptance.

Refs #5400, #5381


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