session reliability: reconnect, knowledge loop, retire request_execution

Phase 1 — crash recovery: SSE auto-reconnect + backoff, polling gate
during disconnect, connection banner with retry button, empty-response
retry 3x, non-terminal resume on empty response, persistent error cards.

Phase 2/4 — visibility + continuation: custom ExecutionStatus renderer,
approvals extracted on every tool_result (not just done), activity bar
with status/goal, SessionDigest live polling, Continue button.

Phase 3 — cleanup: complete_task auto-cancels orphaned approvals,
deletes assent/destructive window keys, propose_plan marks pending
steps as replaced, plan step seq-order enforcement.

Phase 5 — knowledge loop: list_lxcs state filter (active/destroyed),
SOUL.md unmissable writeback section, propose_plan validation nudge,
complete_task writeback check, upsert_knowledge about array support,
plan generation grouping in frontend, session approval count badge.

Retire request_execution — all mutations now route through run.
Updated SOUL.md, AGENTS.md, CLIENTS.md, skills, and agent system notes.

Migration 020: plan step generation column, audit_log session_id index,
nomos_plan_executions pending-approval index.

cmd/nomos/tasks.go

@@ -202,7 +202,16 @@ func (a *agent) handleTaskTool(ctx context.Context, sessionID, name string, args
 		if err != nil {
 			return fmt.Sprintf("error proposing plan: %v", err), true
 		}
-		return fmt.Sprintf("Plan set: %d step(s). Execute them now, marking each with update_plan_step as you go.", len(persisted)), true
+		// Nudge: if the last step doesn't mention entity writeback tools,
+		// the graph will keep drifting — discovered facts won't be persisted.
+		lastStep := steps[len(steps)-1]
+		hasWriteback := strings.Contains(lastStep.Title+lastStep.Detail, "update_entity_attributes") ||
+			strings.Contains(lastStep.Title+lastStep.Detail, "create_relationship")
+		result := fmt.Sprintf("Plan set: %d step(s). Execute them now, marking each with update_plan_step as you go.", len(persisted))
+		if !hasWriteback {
+			result += "\n\n⚠️ The final step doesn't mention update_entity_attributes or create_relationship. Without those, any facts you discovered about entities (IPs, versions, hosts, states) will be LOST — the next session starts from scratch. Consider revising the last step to include entity writeback BEFORE completing the task."
+		}
+		return result, true
 
 	case "update_plan_step":
 		seq := toInt(args["seq"])
@@ -261,7 +270,11 @@ func (a *agent) handleTaskTool(ctx context.Context, sessionID, name string, args
 		if err := a.store.completeTask(ctx, sessionID, outcome, summary); err != nil {
 			return fmt.Sprintf("error completing task: %v", err), true
 		}
-		return fmt.Sprintf("Task marked %s: %s", outcome, summary), true
+		result := fmt.Sprintf("Task marked %s: %s", outcome, summary)
+		if !a.store.hadEntityWriteback(ctx, sessionID) {
+			result += "\n\n⚠️ No entity attributes or relationships were updated in this session. Call update_entity_attributes and create_relationship to persist what you learned about entities before the next session starts from scratch."
+		}
+		return result, true
 	default:
 		return nil, false
 	}