feat(tui): add safe session resume flow

2026-07-24 12:31:26 +08:00
parent 65d29da8a1
commit 2ae9f4fdf3
57 changed files with 2312 additions and 192 deletions
@@ -8,7 +8,7 @@ A SQLite durable session-persistence backend — a second `SessionPersistence` i

 ## Storage model

-Each `SessionEvent` maps 1:1 onto a row in an `events` table `(session_id, seq, type, time, data, source_event_seqs, surface_op)` — `data` is the event payload as JSON text, so the row shape is the event verbatim (including `assistant/chunk`, keeping `seq` contiguous). The two `TEXT` columns `source_event_seqs` and `surface_op` are nullable; they store the event's optional surface-metadata fields (see [session surface](../../../.agents/notes/implemented/architecture/2026-06-18-session-surface.md)). Out-of-log metadata (`SessionHeader`), a per-materialization incarnation id, and a monotonic per-log revision live in a `sessions` row; a singleton state row carries the immutable store id. A `sessions` row is written only by the first `append` — its existence is the lazy-materialization signal (`list` reports exactly the sessions that have a row).
+Each `SessionEvent` maps 1:1 onto a row in an `events` table `(session_id, seq, type, time, data, source_event_seqs, surface_op)` — `data` is the event payload as JSON text, so the row shape is the event verbatim (including `assistant/chunk`, keeping `seq` contiguous). The two `TEXT` columns `source_event_seqs` and `surface_op` are nullable; they store the event's optional surface-metadata fields (see [session surface](../../../.agents/notes/implemented/architecture/2026-06-18-session-surface.md)). Out-of-log metadata (`SessionHeader`), a per-materialization incarnation id, and a monotonic per-log revision live in a `sessions` row; a singleton state row carries the immutable store id, and `live_session_leases` stores one PID and exec-stable nonce per live session. A `sessions` row is written only by the first `append` — its existence is the lazy-materialization signal (`list` reports exactly the sessions that have a row).

 The repository's Node range supports unflagged `node:sqlite`. The database enables foreign keys and uses the configured journal mode (`wal` by default; use a rollback mode where WAL shared-memory files are unsuitable). `PRAGMA user_version` stores the table-layout version; databases with any other version are rejected because this unreleased format has no migrations.

@@ -33,7 +33,7 @@ interface Config {

 ## Write path

-Like the JSONL backend, the plugin copies each frozen `session/event` into one controller per live session and starts an eager drain. Concurrent events share the current transaction; events admitted during it form a follow-up batch, while `session/flush` waits until both current and pending batches are durable. The controller persists a fork's seed once, keeps a write cursor so resume never re-appends stored events, and seeds live sessions on apply because HMR does not replay `session/created`. Dispose drains every retained controller before closing the database.
+Like the JSONL backend, the plugin copies each frozen `session/event` into one controller per live session and starts an eager drain. A live lease is acquired in a `BEGIN IMMEDIATE` transaction before flush or resume and released after the exact lifecycle retires. Concurrent events share the current transaction; events admitted during it form a follow-up batch, while `session/flush` waits until both current and pending batches are durable. The controller persists a fork's seed once, keeps a write cursor so resume never re-appends stored events, and seeds live sessions on apply because HMR does not replay `session/created`. Dispose drains every retained controller before closing the database.

 ## Model Experience