70 lines
2.1 KiB
Markdown
70 lines
2.1 KiB
Markdown
# Session Query
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Exact reads over the live-preferred logical session corpus. The [package contract](../../packages/session-query/session-query) owns source precedence, dynamic optional persistence, cloning, surface classification, bounded windows, and typed failures. Full-text search is a separate proposed SQLite phase.
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Source: [`packages/session-query/session-query/src/types.ts`](../../packages/session-query/session-query/src/types.ts)
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## Logical records
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`SessionRecord` is returned by the cross-corpus list. It exposes source availability independently from the cloned live-preferred header. `SessionEventRecord` is a lightweight raw-log projection; classification uses the same `foldSurface()` transitions as model-history derivation.
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```ts type-equiv
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export type SessionEventSurface = 'current' | 'shadowed' | 'log-only'
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```
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```ts type-equiv
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export interface SessionRecord {
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header: SessionHeader
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live: boolean
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persisted: boolean
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}
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```
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```ts type-equiv
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export interface SessionEventRecord {
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sessionId: SessionId
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seq: number
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type: SessionEventType
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time: number
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surface: SessionEventSurface
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}
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```
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## Bounded event reads
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The request addresses one raw seq and optional neighboring counts. The result carries a `SessionHeader` rather than availability flags so a known live target can remain independent of persistence health.
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```ts type-equiv
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export interface SessionEventReadRequest {
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sessionId: SessionId
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seq: number
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before?: number
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after?: number
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}
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```
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```ts type-equiv
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export interface SessionEventWindow {
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session: SessionHeader
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target: SessionEvent
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events: SessionEvent[]
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startSeq: number
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endSeq: number
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}
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```
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## Errors
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The closed code union distinguishes request validation, missing targets, malformed surface logs, optional-backend failure, and contradictory source metadata.
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```ts type-equiv
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export type SessionQueryErrorCode =
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| 'SESSION_QUERY_EVENT_NOT_FOUND'
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| 'SESSION_QUERY_INVALID_CONFIG'
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| 'SESSION_QUERY_INVALID_SURFACE'
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| 'SESSION_QUERY_INVALID_WINDOW'
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| 'SESSION_QUERY_PERSISTENCE_FAILED'
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| 'SESSION_QUERY_SESSION_NOT_FOUND'
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| 'SESSION_QUERY_SOURCE_CONFLICT'
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```
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