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fix review findings: skip collided SCHEMA_VERSION 3; reject marker-less surface events

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P1: both merge parents shipped SCHEMA_VERSION=3 for different layouts (surface
columns vs seed_length), so an on-disk 3 was ambiguous and wrongly accepted.
Bump to 4 (merged layout) so the version check rejects both sibling v3s.

P2: a surface-eligible event with no surfaceOp lands in the log but vanishes
from deriveMessages() (surface is the sole derivation path). The typed append
overload enforces the marker only when the type arg is a literal; it collapses
to optional when widened to the union (a caller iterating raw events). Guard at
runtime in both append() and the seed constructor — no backward-compat for
surface-less logs. Shared seed fixtures carry surfaceOp explicitly and the
appendLog helper forwards it verbatim (no synthesized default). Exports
isSurfaceEligibleType. Regression tests for all three, each verified to fail
on the unfixed code.

Gates: typecheck, test (1115), snapshot (14), doc-sync, lint, build, hygiene green.
This commit is contained in:
Hypatia May
2026-06-24 17:45:48 +08:00
parent 9cc8dc371e
commit 828c3f85c9
14 changed files with 166 additions and 36 deletions
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14
packages/session-persistence/session-persistence-sqlite/src/schema.ts
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@@ -15,7 +15,7 @@ import type { SessionEvent, SessionId, SessionHeader, SurfaceOp } from '@deepsee
* layout; orthogonal to a session's own `version` (which versions the EVENT
* vocabulary, stored per session in the `sessions` row).
*/
export const SCHEMA_VERSION = 3
export const SCHEMA_VERSION = 4
/**
* A row of the `sessions` table — the out-of-log metadata ({@link SessionHeader}).
@@ -56,9 +56,15 @@ export interface EventRow {
* current {@link SCHEMA_VERSION}; an existing database whose version is NOT the
* current one (written by a different, incompatible build — older or newer) is
* REJECTED rather than opened against a layout this build does not understand.
* There are no migrations: an earlier layout (v1's different `sessions` shape,
* v2 without the `seed_length`/`source_event_seqs`/`surface_op` columns) is not
* upgraded in place — it is rejected.
* There are no migrations: an earlier layout is not upgraded in place — it is
* rejected. v1 had a different `sessions` shape; v2 lacked all of
* `seed_length`/`source_event_seqs`/`surface_op`. v3 is SKIPPED: two unmerged
* branches each shipped a DISTINCT v3 (one adding only `seed_length`, the other
* adding only the surface columns), so an on-disk v3 is ambiguous — it could be
* either sibling layout, neither of which has all of this build's columns. v4
* is the merged layout carrying every column; bumping past the collided v3
* makes the version check reject both sibling v3 databases instead of opening
* one against columns it does not have.
*/
export function openDatabase(path: string): DatabaseSync {
const db = new DatabaseSync(path)