perf(protocol): bound stale thread replay - #89
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What Changed
threadDeltaSubscriptioncapability.orchestration.subscribeThread.withDelta, which replays gaps up to 1,000 orchestration events and sends a fresh snapshot for larger or invalid gaps.not-foundstream item so clients clear stale cached threads when snapshot fallback finds no active thread.orchestration.subscribeThreadcontract and behavior unchanged.FORK.md.Why
Reopening a stale large thread can trigger an unbounded event replay. The capability-gated extension bounds that work while upstream clients and backends continue using the unchanged upstream RPC.
Checklist
Model: GPT-5
Harness: T3 Code