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# Conflicts: # packages/bash/bash-sandbox/README.md # packages/sandbox/sandbox-local/README.md
29 lines
2.5 KiB
Markdown
29 lines
2.5 KiB
Markdown
# @deepseek-ai/dsh-session-query
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Exact session-history retrieval 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`.
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## Reads
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- `listSessions()` reads current persistence metadata, merges live records with live precedence, and returns cloned records in deterministic newest-first order.
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- `listEvents(sessionId)` loads the live-preferred raw log and classifies each event as `current`, `shadowed`, or `log-only` with the shared `dsh-session` surface fold.
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- `readEvent(request)` returns a cloned header, the full target event, and a bounded raw-seq window. `before` and `after` default to zero and may not exceed `readWindowMax`.
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Persistence is optional and may mount or unmount dynamically. A cross-corpus list fails with `SESSION_QUERY_PERSISTENCE_FAILED` while mounted persistence is unreadable. A read targeting a known live session does not consult persistence, so durable backend health cannot make current in-memory history unreadable. Persisted exact reads list before loading, and reject a metadata mismatch rather than combining inconsistent observations.
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`SessionQueryError.code` is a closed union: `SESSION_QUERY_EVENT_NOT_FOUND`, `SESSION_QUERY_INVALID_CONFIG`, `SESSION_QUERY_INVALID_SURFACE`, `SESSION_QUERY_INVALID_WINDOW`, `SESSION_QUERY_PERSISTENCE_FAILED`, `SESSION_QUERY_SESSION_NOT_FOUND`, and `SESSION_QUERY_SOURCE_CONFLICT`.
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## Configuration
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| Key | Default | Contract |
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| `readWindowMax` | `50` | Maximum `before` or `after` raw-event count. |
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## Model Experience
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None, as this trusted query service returns cloned session records only to its callers and registers no model-facing prompt, schema, tool, or message.
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## Known Limitations and Deferred Work
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- **No caller authorization** — this is trusted context-wide infrastructure; a future model tool or UI must constrain which sessions its caller may inspect.
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- **Exact retrieval only** — filters, lineage/provenance traversal, extraction, search-provider protocol, index synchronization, and a model-facing tool are absent. Full-text search belongs beside its first implementation; the proposed SQLite package and its single transaction/reconciliation owner are described in the [phase-two RFC](../../../docs/rfc/proposed/feature/2026-07-10-sqlite-session-query-provider.md).
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