Distillation

Date: Sep 14, 2026

• 🟡 (10:31) /home/byk/Code/opencode/specs/v2/schema-changelog.md lines 80-109 specify replay-and-tail aggregate cursors backed by durable Session-event sequences; synchronized payloads are encoded before JSON storage and decoded during replay; fragment streams do not advance durable cursors or inflate synchronized storage; durable replay cursors use per-aggregate event sequences and intentionally omit ephemeral deltas after reconnect.
• 🟡 (10:31) Durable step settlement is bound to an explicit assistant message ID because provider-local call identifiers can repeat across turns; the durable payload change requires synchronized event version 2 for session.next.step.ended and session.next.step.failed in /home/byk/Code/opencode/specs/v2/schema-changelog.md lines 93-109.