Distillation

Date: Sep 15, 2026

• 🔴 (16:34) User stated the recovery design must never resume an older assistant projection; a newer turn supersedes stale incomplete rows.
• 🟡 (16:34) packages/core/src/session/projector.ts:144 documents the supersession invariant: A newer turn supersedes stale incomplete rows; never resume an older assistant projection.
• 🟡 (16:34) packages/core/src/session/projector.ts:412 defects when a recovery target is not an assistant message, using the exact error Recovery target is not an assistant: ${event.data.assistantMessageID}.