# Conflicts: # .agents/notes/implemented/architecture/2026-06-18-shared-persistence-write-coordinator.md # docs/core-data-structures/persistence.md # packages/session-persistence/session-persistence/README.md
session-persistence/ — persistence capability family
The durable session-persistence seam and its storage backends. The interface package owns the abstract SessionPersistence service and the shared write coordinator; the backends are concrete implementations that register on ctx.sessionPersistence. All product packages.
| Package | Role | ctx key |
|---|---|---|
session-persistence/ |
Persistence seam + shared write coordinator | ctx.sessionPersistence |
session-checkpoint-policy/ |
Semantic durability barriers for agent requests and tool execution | (wraps ctx.llm / ctx.tools, listens on agent events) |
session-persistence-jsonl/ |
JSONL-sidecar persistence backend | (registers ctx.sessionPersistence) |
session-persistence-sqlite/ |
SQLite persistence backend | (registers ctx.sessionPersistence) |
The interface lives at session-persistence/session-persistence/; backends are flat siblings. A new storage backend joins here and registers on ctx.sessionPersistence. See session persistence.