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refactor(session-query): unify query service

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Hypatia May
2026-07-23 20:16:14 +08:00
parent a2a89bf300
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packages/session-query/session-query/README.md
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# @deepseek-ai/dsh-session-query
Exact session-history retrieval, relationship tracing, and provider-independent filtering through `ctx.sessionQuery`. The service presents live `ctx.sessions` and an optional, dynamically mounted `ctx.sessionPersistence` as one logical corpus. Matching ids produce one record: live events win, while `live` and `persisted` report both source availabilities. Conflicting immutable headers fail with `SESSION_QUERY_SOURCE_CONFLICT`. The abstract `ctx.sessionSearch` service defines full-text search without introducing a provider registry.
`SessionQueryService` is the combined abstract `ctx.sessionQuery` contract. It implements exact session-history retrieval, relationship tracing, and provider-independent filtering over live `ctx.sessions` plus optional dynamically mounted `ctx.sessionPersistence`; concrete backends implement its two full-text methods. Matching ids produce one record: live events win, while `live` and `persisted` report both source availabilities. Conflicting immutable headers fail with `SESSION_QUERY_SOURCE_CONFLICT`.
## Reads
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The text clause is deliberately independent of FTS providers: caller text is escaped into a Unicode, case-insensitive regular expression, and each whitespace run matches one or more whitespace characters. It is a literal semantic-text scan, not a full-text query. `extractSessionEventText()` and `buildSessionEventSearchDocuments()` define the shared first-party document projection; structural boundaries, stream chunks, request headers, and unknown declaration-merged variants produce no document.
## Full-text seam
## Full-text methods
`SessionSearchService` owns the independent `ctx.sessionSearch` key. `searchSessions(request, exec?)` groups the logical corpus by strongest matching event; `searchEvents(request, exec?)` searches one logical session. Both return pages whose continuation is an owned branded `SessionSearchCursor`, accept optional cancellation, and expose snippets without provider-specific numeric scores. Search requests accept only metadata event filters, because literal-text filtering is the scan path described above.
`SessionQueryService.searchSessions(request, exec?)` groups the logical corpus by strongest matching event; `searchEvents(request, exec?)` searches one logical session. These are the service's only abstract methods. Both return pages whose continuation is an owned branded `SessionSearchCursor`, accept optional cancellation, and expose snippets without provider-specific numeric scores. Search requests accept only metadata event filters, because literal-text filtering is the scan path described above.
The package has no provider coordinator or registration protocol. A concrete backend owns observation, reconciliation, ranking, cursor generations, and query execution as one lifecycle; the first implementation is [`@deepseek-ai/dsh-session-query-sqlite`](../session-query-sqlite/README.md).
The package has no provider coordinator, fallback implementation, or standalone concrete plugin. A concrete service backend inherits the implemented reads, filters, and traces while owning full-text observation, reconciliation, ranking, cursor generations, and query execution; the first implementation is [`@deepseek-ai/dsh-session-query-sqlite`](../session-query-sqlite/README.md).
`SessionQueryError.code` is a closed union covering request validation, missing targets, malformed surfaces, source conflicts, persistence/index failures, cancellation, and invalid or stale cursors; the exact literals are defined in [`src/config.ts`](src/config.ts).