#21 (CRIT): ToolResultPacker.pack(_:) is now a pass-through decoder; redundant inner 8 KB cap removed. MCP dispatcher's SanitizeForModel.prepareForBoundary(_, capBytes: 8192) is the sole cap site. Doc-comment rewritten honestly: replay row reflects boundary-prepared bytes (8 KB), not original helper output. Replay fidelity beyond 8 KB lifted to v0.5/M-3 once SanitizeForModel can move to a shared module without dep cycle.
#20 (CRIT): ReplayingToolResultObserver.turnIDResolver lock-protected via OSAllocatedUnfairLock<ResolverBox> (same Swift-6-async-safe pattern as InProcessConfirmationCache). New attach(turnIDResolver:) method. AgentOrchestrator.currentTurnID() actor-isolated accessor. installAgent attaches the resolver immediately after orchestrator assignment, with defensive systemLogger.warning if observer type mismatches.
Tests: ToolResultPackerTests TP2/TP5 updated to assert no [TRUNCATED] marker; OrchestratorSubmitTests OS6 reframed + new OS6b reads SQLite events table directly to assert 8 KB exact; MCPRuntimeWiringTests adds attach pre/post-attach + replay-log dual-write correlation.
AgentCore 243 + Memory 98 + Replay 34 + MCP all green; all 18 boundary gates green.
james.maes
bc74494ada