feat(sessions): Add automatic session cleanup and retention policy (#7662)

packages/core/src/core/client.ts

@@ -207,6 +207,10 @@ export class GeminiClient {
     return this.loopDetector;
   }
 
+  getCurrentSequenceModel(): string | null {
+    return this.currentSequenceModel;
+  }
+
   async addDirectoryContext(): Promise<void> {
     if (!this.chat) {
       return;

packages/core/src/core/geminiChat.ts

@@ -26,6 +26,7 @@ import {
 } from '../config/models.js';
 import { hasCycleInSchema, MUTATOR_KINDS } from '../tools/tools.js';
 import type { StructuredError } from './turn.js';
+import type { CompletedToolCall } from './coreToolScheduler.js';
 import {
   logContentRetry,
   logContentRetryFailure,
@@ -584,6 +585,33 @@ export class GeminiChat {
     return this.chatRecordingService;
   }
 
+  /**
+   * Records completed tool calls with full metadata.
+   * This is called by external components when tool calls complete, before sending responses to Gemini.
+   */
+  recordCompletedToolCalls(
+    model: string,
+    toolCalls: CompletedToolCall[],
+  ): void {
+    const toolCallRecords = toolCalls.map((call) => {
+      const resultDisplayRaw = call.response?.resultDisplay;
+      const resultDisplay =
+        typeof resultDisplayRaw === 'string' ? resultDisplayRaw : undefined;
+
+      return {
+        id: call.request.callId,
+        name: call.request.name,
+        args: call.request.args,
+        result: call.response?.responseParts || null,
+        status: call.status as 'error' | 'success' | 'cancelled',
+        timestamp: new Date().toISOString(),
+        resultDisplay,
+      };
+    });
+
+    this.chatRecordingService.recordToolCalls(model, toolCallRecords);
+  }
+
   /**
    * Extracts and records thought from thought content.
    */

packages/core/src/services/chatRecordingService.ts

@@ -16,6 +16,8 @@ import type {
   GenerateContentResponseUsageMetadata,
 } from '@google/genai';
 
+export const SESSION_FILE_PREFIX = 'session-';
+
 /**
  * Token usage summary for a message or conversation.
  */
@@ -149,7 +151,7 @@ export class ChatRecordingService {
           .toISOString()
           .slice(0, 16)
           .replace(/:/g, '-');
-        const filename = `session-${timestamp}-${this.sessionId.slice(
+        const filename = `${SESSION_FILE_PREFIX}${timestamp}-${this.sessionId.slice(
           0,
           8,
         )}.json`;
@@ -195,7 +197,7 @@ export class ChatRecordingService {
    * Records a message in the conversation.
    */
   recordMessage(message: {
-    model: string;
+    model: string | undefined;
     type: ConversationRecordExtra['type'];
     content: PartListUnion;
   }): void {