fix(run-housekeeping): gate auto knowledge_base writes on task type or department

src/main/run-housekeeping.ts

@@ -7,6 +7,53 @@ interface RunHousekeepingDeps {
   threadIntegration: ThreadIntegrationService;
 }
 
+/**
+ * Task types whose successful runs produce durable lessons worth capturing
+ * into the knowledge base. Ad-hoc code tasks, chores, and one-off ops
+ * produce runtime noise that pollutes the knowledge table if auto-saved.
+ */
+const KNOWLEDGE_PRODUCING_TASK_TYPES: ReadonlySet<string> = new Set([
+  "research",
+  "analysis",
+  "planning",
+  "strategy",
+  "review",
+]);
+
+/**
+ * Agent departments whose output is routinely curated as corporate
+ * knowledge regardless of task type.
+ */
+const KNOWLEDGE_PRODUCING_DEPARTMENTS: ReadonlySet<string> = new Set([
+  "research",
+  "strategy",
+  "management",
+]);
+
+function shouldProduceKnowledge(
+  db: AppDatabase,
+  taskId: string,
+  agentId: string,
+): boolean {
+  try {
+    const taskTypeRow = db.queryAll<{ taskType: string | null }>(
+      "SELECT task_type as taskType FROM tasks WHERE id = ? LIMIT 1",
+      taskId,
+    )[0];
+    if (taskTypeRow?.taskType && KNOWLEDGE_PRODUCING_TASK_TYPES.has(taskTypeRow.taskType)) {
+      return true;
+    }
+  } catch {
+    // Task deleted; fall through to agent check
+  }
+  try {
+    const agent = db.getAgent(agentId);
+    return Boolean(agent.department && KNOWLEDGE_PRODUCING_DEPARTMENTS.has(agent.department));
+  } catch {
+    return false;
+  }
+}
+
 export function createRunHousekeeping({ db, logger, threadIntegration }: RunHousekeepingDeps) {
   return {
     onRunCompleted(
@@ -25,8 +72,15 @@ export function createRunHousekeeping({ db, logger, threadIntegration }: RunHous
         logger.error(`[run-housekeeping] threadIntegration.onRunFinished failed: ${err instanceof Error ? err.message : String(err)}`);
       }
 
-      // 2. On success with a meaningful summary, create a knowledge candidate
-      if (status === "succeeded" && summary && summary.length > 50) {
+      // 2. On success with a meaningful summary, create a knowledge candidate —
+      //    gated on the task type or the producing agent's department so
+      //    ad-hoc runs do not flood the knowledge table with summaries.
+      if (
+        status === "succeeded" &&
+        summary &&
+        summary.length > 50 &&
+        shouldProduceKnowledge(db, taskId, agentId)
+      ) {
         try {
           let topic = `Run ${runId.slice(0, 8)}`;
           try {