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refactor: prune dead session surfaces

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Tianyi Cui
2026-07-13 23:25:20 +08:00
parent 62eba83f4f
commit d060c0dd4f
13 changed files with 43 additions and 175 deletions
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2
docs/cordis-catalog/services.md
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@@ -199,7 +199,7 @@ abstract list(): Promise<SessionHeader[]>
Types: [SessionEvent](../core-data-structures/core.md)
Source: [`packages/session-persistence/session-persistence/src/index.ts:102`](../../packages/session-persistence/session-persistence/src/index.ts)
Source: [`packages/session-persistence/session-persistence/src/index.ts:68`](../../packages/session-persistence/session-persistence/src/index.ts)
## `ctx.sessions` — `SessionStore`

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docs/rfc/implemented/architecture/2026-06-18-session-surface.md
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@@ -31,7 +31,7 @@ export type SurfaceOp =
### SurfaceManager: delta-based, not full rebuild
A `SurfaceManager` class (private to `Session`) maintains the cached linked list. It tracks `_lastProcessedSeq` and processes only the **delta** (new events since the last access) rather than rescanning the entire log. Because the log is append-only, prior events never change — full rebuild is only needed after a wholesale log replacement (e.g., seeding).
A `SurfaceManager` class (private to `Session`) maintains the cached linked list. It tracks `_lastProcessedSeq` and processes only the **delta** (new events since the last access) rather than rescanning the entire log. Because the log is append-only, prior events never change; a seeded log is simply the initial delta folded on first access.
Delta processing is O(1) when no new events and O(new events) when new events arrive.