init: add source code from src.zip

src/services/api/emptyUsage.ts

@@ -0,0 +1,22 @@
+import type { NonNullableUsage } from '../../entrypoints/sdk/sdkUtilityTypes.js'
+
+/**
+ * Zero-initialized usage object. Extracted from logging.ts so that
+ * bridge/replBridge.ts can import it without transitively pulling in
+ * api/errors.ts → utils/messages.ts → BashTool.tsx → the world.
+ */
+export const EMPTY_USAGE: Readonly<NonNullableUsage> = {
+  input_tokens: 0,
+  cache_creation_input_tokens: 0,
+  cache_read_input_tokens: 0,
+  output_tokens: 0,
+  server_tool_use: { web_search_requests: 0, web_fetch_requests: 0 },
+  service_tier: 'standard',
+  cache_creation: {
+    ephemeral_1h_input_tokens: 0,
+    ephemeral_5m_input_tokens: 0,
+  },
+  inference_geo: '',
+  iterations: [],
+  speed: 'standard',
+}