feat: add role-specific statistics to telemetry and UI (cont. #15234) (#18824)

Co-authored-by: Yuna Seol <yunaseol@google.com>

packages/core/src/services/chatCompressionService.ts

@@ -31,6 +31,7 @@ import {
   PREVIEW_GEMINI_FLASH_MODEL,
 } from '../config/models.js';
 import { PreCompressTrigger } from '../hooks/types.js';
+import { LlmRole } from '../telemetry/types.js';
 
 /**
  * Default threshold for compression token count as a fraction of the model's
@@ -339,6 +340,7 @@ export class ChatCompressionService {
       promptId,
       // TODO(joshualitt): wire up a sensible abort signal,
       abortSignal: abortSignal ?? new AbortController().signal,
+      role: LlmRole.UTILITY_COMPRESSOR,
     });
     const summary = getResponseText(summaryResponse) ?? '';
 
@@ -365,6 +367,7 @@ export class ChatCompressionService {
         ],
         systemInstruction: { text: getCompressionPrompt(config) },
         promptId: `${promptId}-verify`,
+        role: LlmRole.UTILITY_COMPRESSOR,
         abortSignal: abortSignal ?? new AbortController().signal,
       });
 

packages/core/src/services/loopDetectionService.ts

@@ -25,6 +25,7 @@ import {
   isFunctionResponse,
 } from '../utils/messageInspectors.js';
 import { debugLogger } from '../utils/debugLogger.js';
+import { LlmRole } from '../telemetry/types.js';
 
 const TOOL_CALL_LOOP_THRESHOLD = 5;
 const CONTENT_LOOP_THRESHOLD = 10;
@@ -554,6 +555,7 @@ export class LoopDetectionService {
         abortSignal: signal,
         promptId: this.promptId,
         maxAttempts: 2,
+        role: LlmRole.UTILITY_LOOP_DETECTOR,
       });
 
       if (

packages/core/src/services/sessionSummaryService.ts

@@ -10,6 +10,7 @@ import { partListUnionToString } from '../core/geminiRequest.js';
 import { debugLogger } from '../utils/debugLogger.js';
 import type { Content } from '@google/genai';
 import { getResponseText } from '../utils/partUtils.js';
+import { LlmRole } from '../telemetry/types.js';
 
 const DEFAULT_MAX_MESSAGES = 20;
 const DEFAULT_TIMEOUT_MS = 5000;
@@ -124,6 +125,7 @@ export class SessionSummaryService {
           contents,
           abortSignal: abortController.signal,
           promptId: 'session-summary-generation',
+          role: LlmRole.UTILITY_SUMMARIZER,
         });
 
         const summary = getResponseText(response);