[Fix] Subtasks fail to return when users work across windows - #1471

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fix/cross-window-subtask-completion-38vl1fvfffmq9

Commits on Sep 12, 2026

fix: prevent stale cross-window subtask completion
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3b07f56
test(task): cover cross-window handoff failures
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4962d45
test(task): cover remaining handoff guards
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refactor(task): keep mutation scope focused
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refactor(task): fit changed-code mutation cap
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test(task): align real lock concurrency coverage
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refactor(task): compose locked delegation transition
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test(task): expose delegation suites to mutation gate
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fix(task): compensate failed delegated handoffs
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refactor(task): keep compensation mutation-focused
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refactor(task): fit compensated mutation scope
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test(task): close changed-code mutation gaps
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refactor(task): make disk guards mutation-visible
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test(task): verify cross-host handoff protocol
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fix(task): address latest concurrency review
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refactor(task): keep reviewed mutation scope bounded
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test(task): cover caller-held lock rollback
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fix(task): integrate latest lifecycle persistence
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refactor(task): compose latest locked handoff
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test(task): cover latest locked handoff branches
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test(task): cover lock failure without recovery hook
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fix(task): retain backup after lock compromise
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refactor(task): keep compromised backup guard narrow
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refactor(task): minimize retained backup path
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refactor(task): log retained backup compactly
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fix(task): retain backup after rollback failure
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test(task): verify delegated child startup
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fix(task): preserve compromised lock recovery
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refactor(task): narrow recovery cleanup flow
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test(task): cover recovery retention boundaries
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test(task): close recovery mutation gaps
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test(task): cover lock outcome arbitration
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refactor(task): consolidate handoff recovery
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refactor(task): keep handoff diff localized
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refactor(task): reuse guarded preimage restore
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refactor(task): collapse duplicate transition branches
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refactor(task): preserve narrow mutation ranges
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refactor(task): flatten persistence branches
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refactor(task): remove incidental merge mode
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refactor(task): specialize locked handoff runner
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refactor(task): inline atomic pair temporaries
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refactor(task): use atomic delegation lock directly
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test(task): cover completed cancellation cleanup
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refactor(task): finalize atomic rollback contract
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test(task): model callback failure prefixes
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fix(task): close pre-merge recovery gaps
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test(task): close review concurrency gaps
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refactor(task): compact ambiguous compensation guards
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refactor(task): restore compact compensation selection
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refactor(task): keep mutation scope bounded
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refactor(task): reuse direct lifecycle paths
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fix(task): preserve explicit removal and compromise diagnostics
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refactor(task): simplify guarded failure handling
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refactor(task): share delegation guards
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refactor(task): preserve compensation arrays
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refactor(task): compact compensation tuples
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test(task): kill compensation and handoff mutants
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fix(task): restore absent pair preimages safely
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refactor(task): compact preimage states
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refactor(task): consolidate locked persistence paths
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refactor(task): keep persistence mutation scope bounded
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refactor(task): compact pair invariant errors
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refactor(task): compact compensation reporting
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refactor(core): centralize task preimage validation
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test(task): cover preimage restoration branches
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test(task): harden compensation mutation coverage
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test(task): cover final compensation mutants
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refactor(core): build expected preimage states
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fix(task): drain delegation transitions on dispose
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refactor(task): compact delegation tracker
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refactor(task): preserve delegation lock naming
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fix(task): track direct delegation entrypoints
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refactor(task): support plain delegation stubs
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refactor(task): reuse history update posting
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refactor(core): centralize active task callbacks
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