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feat(runtime): expand concurrency strategies — debounce, burst, concurrent, lockScope, preemption (ADR 0012) #7
Description
Expand runtime concurrency handling beyond ConcurrencyDrop and ConcurrencyQueue to the remaining strategies specified in ADR 0012.
Motivation
Under deferred dispatch (DispatchDeferred, ADR 0002), long-running LLM/tool work needs richer concurrency control than drop/queue: debouncing rapid human message bursts, batching, lock-free concurrent reads, channel-scoped locking, and preemption of in-flight handlers.
Acceptance
ConcurrencyDebounce,ConcurrencyBurst,ConcurrencyConcurrentimplemented in the runtime per ADR 0012.- Configurable lock scope (
threaddefault,channelopt-in). - Handler preemption / steerability hook with force-release-lock coordination via
chat.State. - Conformance + hardening tests for every new strategy lifecycle, matching the existing test style (
queue_edge_test.go,dispatch_deferred_test.go).
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Activity
feat(runtime): expand concurrency strategies per ADR 0012
feat(runtime): expand concurrency strategies per ADR 0012
ThomasK33 commentedon Aug 27, 2026
Status update — partial delivery via a maintainer-directed split of #38:
Merging via #38 (reduced):
ConcurrencyDebounce,ConcurrencyConcurrent, configurableLockScope(thread default / channel opt-in), and universal lease-loss cancellation for deferred handlers (chat.ErrPreemptedcause,preemptedoutcome), with hardening test suites for each lifecycle, race-detector-clean across all workspace modules.Staged (not merging yet):
ConcurrencyBurstand theOnLockConflictforce/steerability hook (plus theLockForcerState capability). Nine codex review rounds converged everywhere except these two areas, whose remaining P1s (atomic remote-force validation, stallable burst refresh, mixed sync/deferred fencing) are structural consequences of key-only force-release and unbounded deferred admission. They live on draft PR #53 and re-enter after the design pass tracked in #44 (admission bound) and #50 (fenced coordination: cross-instance coalescing + token-bound force).This issue stays open until the staged surface lands.
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mux• Model:anthropic:claude-fable-5• Thinking:xhigh