feat(session-query): checkpoint build round 1

packages/session-query/session-query/src/config.ts

@@ -0,0 +1,29 @@
+/**
+ * Public configuration, defaults, and typed failures for session-query.
+ *
+ * @module @deepseek-ai/dsh-session-query/config
+ */
+
+import { HarnessError } from '@deepseek-ai/dsh-llm'
+
+/** Default page size for provider-backed search. */
+export const SESSION_QUERY_DEFAULT_LIMIT = 20
+/** Maximum page size accepted by provider-backed search. */
+export const SESSION_QUERY_MAX_LIMIT = 100
+/** Default maximum `before`/`after` raw-event window. */
+export const SESSION_QUERY_READ_WINDOW_MAX = 50
+
+/** Configuration for the provider-neutral session-query service. */
+export interface Config {
+  /** Explicit provider id; omitted auto-selects exactly one usable provider. */
+  searchProvider?: string
+  /** Default search result page size. Defaults to 20. */
+  defaultLimit?: number
+  /** Maximum accepted search page size. Defaults to 100. */
+  maxLimit?: number
+  /** Maximum accepted raw read context on either side. Defaults to 50. */
+  readWindowMax?: number
+}
+
+/** Typed session-query failure with a stable machine-routable code. */
+export class SessionQueryError extends HarnessError {}