[Init] Initial commit - NetMesh terminal manager

infrastructure/ai/harness/turnDrivers/externalSdkEventState.ts

@@ -0,0 +1,25 @@
+import type { AgentActivity, AgentUsage } from '../../types';
+
+export function upsertAgentActivity(
+  activities: AgentActivity[] | undefined,
+  nextActivity: AgentActivity,
+): AgentActivity[] {
+  const current = activities ?? [];
+  const existingIndex = current.findIndex((activity) => activity.id === nextActivity.id);
+  if (existingIndex < 0) return [...current, nextActivity];
+  return current.map((activity, index) => index === existingIndex ? nextActivity : activity);
+}
+
+export function resolveEstimatedUsageFallback(
+  prompt: string,
+  actualUsageReported: boolean,
+): AgentUsage | null {
+  if (actualUsageReported) return null;
+  const estimatedTokens = Math.ceil(prompt.length / 4);
+  return {
+    inputTokens: estimatedTokens,
+    outputTokens: 0,
+    totalTokens: estimatedTokens,
+    estimated: true,
+  };
+}