fix: make session memory indexing async

src/config/schema.ts

@@ -220,6 +220,8 @@ const FIELD_LABELS: Record<string, string> = {
   "agents.defaults.memorySearch.sync.onSearch": "Index on Search (Lazy)",
   "agents.defaults.memorySearch.sync.watch": "Watch Memory Files",
   "agents.defaults.memorySearch.sync.watchDebounceMs": "Memory Watch Debounce (ms)",
+  "agents.defaults.memorySearch.sync.sessions.deltaBytes": "Session Delta Bytes",
+  "agents.defaults.memorySearch.sync.sessions.deltaMessages": "Session Delta Messages",
   "agents.defaults.memorySearch.query.maxResults": "Memory Search Max Results",
   "agents.defaults.memorySearch.query.minScore": "Memory Search Min Score",
   "agents.defaults.memorySearch.query.hybrid.enabled": "Memory Search Hybrid",
@@ -474,8 +476,12 @@ const FIELD_HELP: Record<string, string> = {
   "agents.defaults.memorySearch.cache.maxEntries":
     "Optional cap on cached embeddings (best-effort).",
   "agents.defaults.memorySearch.sync.onSearch":
-    "Lazy sync: reindex on first search after a change.",
+    "Lazy sync: schedule a reindex on search after changes.",
   "agents.defaults.memorySearch.sync.watch": "Watch memory files for changes (chokidar).",
+  "agents.defaults.memorySearch.sync.sessions.deltaBytes":
+    "Minimum appended bytes before session transcripts trigger reindex (default: 100000).",
+  "agents.defaults.memorySearch.sync.sessions.deltaMessages":
+    "Minimum appended JSONL lines before session transcripts trigger reindex (default: 50).",
   "plugins.enabled": "Enable plugin/extension loading (default: true).",
   "plugins.allow": "Optional allowlist of plugin ids; when set, only listed plugins load.",
   "plugins.deny": "Optional denylist of plugin ids; deny wins over allowlist.",

src/config/types.tools.ts

@@ -244,6 +244,12 @@ export type MemorySearchConfig = {
     watch?: boolean;
     watchDebounceMs?: number;
     intervalMinutes?: number;
+    sessions?: {
+      /** Minimum appended bytes before session transcripts are reindexed. */
+      deltaBytes?: number;
+      /** Minimum appended JSONL lines before session transcripts are reindexed. */
+      deltaMessages?: number;
+    };
   };
   /** Query behavior. */
   query?: {

src/config/zod-schema.agent-runtime.ts

@@ -305,6 +305,13 @@ export const MemorySearchSchema = z
         watch: z.boolean().optional(),
         watchDebounceMs: z.number().int().nonnegative().optional(),
         intervalMinutes: z.number().int().nonnegative().optional(),
+        sessions: z
+          .object({
+            deltaBytes: z.number().int().nonnegative().optional(),
+            deltaMessages: z.number().int().nonnegative().optional(),
+          })
+          .strict()
+          .optional(),
       })
       .strict()
       .optional(),