feat(logging): add usage logging hooks for AI stack monitoring

- Add usage-logging hook that sends events to log-ingest service
- Track session start/end, tool calls, and token usage
- Integrate with LOG_INGEST_URL environment variable
- Update hooks index to include usage-logging

src/index.ts

@@ -31,6 +31,7 @@ import {
   createStartWorkHook,
   createSisyphusOrchestratorHook,
   createPrometheusMdOnlyHook,
+  createUsageLoggingHook,
 } from "./hooks";
 import {
   contextCollector,
@@ -212,6 +213,13 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
     ? createPrometheusMdOnlyHook(ctx)
     : null;
 
+  const usageLogging = isHookEnabled("usage-logging")
+    ? createUsageLoggingHook({
+        stackName: process.env.STACK_NAME,
+        ingestUrl: process.env.LOG_INGEST_URL,
+      })
+    : null;
+
   const taskResumeInfo = createTaskResumeInfoHook();
 
   const backgroundManager = new BackgroundManager(ctx);
@@ -411,6 +419,7 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
       await interactiveBashSession?.event(input);
       await ralphLoop?.event(input);
       await sisyphusOrchestrator?.handler(input);
+      await usageLogging?.event(input);
 
       const { event } = input;
       const props = event.properties as Record<string, unknown> | undefined;