Adds centralized support to log slash commands + sub commands (#5128)

packages/core/src/telemetry/clearcut-logger/clearcut-logger.ts

@@ -19,6 +19,7 @@ import {
   FlashFallbackEvent,
   LoopDetectedEvent,
   FlashDecidedToContinueEvent,
+  SlashCommandEvent,
 } from '../types.js';
 import { EventMetadataKey } from './event-metadata-key.js';
 import { Config } from '../../config/config.js';
@@ -40,6 +41,7 @@ const end_session_event_name = 'end_session';
 const flash_fallback_event_name = 'flash_fallback';
 const loop_detected_event_name = 'loop_detected';
 const flash_decided_to_continue_event_name = 'flash_decided_to_continue';
+const slash_command_event_name = 'slash_command';
 
 export interface LogResponse {
   nextRequestWaitMs?: number;
@@ -528,6 +530,25 @@ export class ClearcutLogger {
     this.flushIfNeeded();
   }
 
+  logSlashCommandEvent(event: SlashCommandEvent): void {
+    const data = [
+      {
+        gemini_cli_key: EventMetadataKey.GEMINI_CLI_SLASH_COMMAND_NAME,
+        value: JSON.stringify(event.command),
+      },
+    ];
+
+    if (event.subcommand) {
+      data.push({
+        gemini_cli_key: EventMetadataKey.GEMINI_CLI_SLASH_COMMAND_SUBCOMMAND,
+        value: JSON.stringify(event.subcommand),
+      });
+    }
+
+    this.enqueueLogEvent(this.createLogEvent(slash_command_event_name, data));
+    this.flushIfNeeded();
+  }
+
   logEndSessionEvent(event: EndSessionEvent): void {
     const data = [
       {

packages/core/src/telemetry/clearcut-logger/event-metadata-key.ts

@@ -163,6 +163,16 @@ export enum EventMetadataKey {
 
   // Logs the type of loop detected.
   GEMINI_CLI_LOOP_DETECTED_TYPE = 38,
+
+  // ==========================================================================
+  // Slash Command Event Keys
+  // ===========================================================================
+
+  // Logs the name of the slash command.
+  GEMINI_CLI_SLASH_COMMAND_NAME = 41,
+
+  // Logs the subcommand of the slash command.
+  GEMINI_CLI_SLASH_COMMAND_SUBCOMMAND = 42,
 }
 
 export function getEventMetadataKey(