feat(bruno-requests): log when reusing cached agent

- HTTPS agents: "Reusing cached agent (SSL session reuse enabled)"
- HTTP agents: "Reusing cached agent (connection reuse enabled)"

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/bruno-requests/src/utils/agent-cache.spec.ts

@@ -1,7 +1,7 @@
 import https from 'node:https';
 import http from 'node:http';
 import { EventEmitter } from 'node:events';
-import { getOrCreateAgent, clearAgentCache, getAgentCacheSize } from './agent-cache';
+import { getOrCreateAgent, getOrCreateHttpAgent, clearAgentCache, getAgentCacheSize } from './agent-cache';
 
 describe('Agent Cache', () => {
   beforeEach(() => {
@@ -89,6 +89,34 @@ describe('Agent Cache', () => {
       expect(agent2.timeline).toBe(timeline2);
     });
 
+    it('logs when reusing a cached HTTPS agent', () => {
+      const timeline1: any[] = [];
+      const timeline2: any[] = [];
+
+      // First call creates new agent - no reuse message
+      getOrCreateAgent(https.Agent, {}, null, timeline1);
+      expect(timeline1.some((e) => e.message.includes('Reusing cached agent'))).toBe(false);
+
+      // Second call reuses cached agent - should log reuse message with SSL session reuse
+      getOrCreateAgent(https.Agent, {}, null, timeline2);
+      expect(timeline2.some((e) => e.message.includes('Reusing cached agent'))).toBe(true);
+      expect(timeline2.some((e) => e.message.includes('SSL session reuse'))).toBe(true);
+    });
+
+    it('logs when reusing a cached HTTP agent', () => {
+      const timeline1: any[] = [];
+      const timeline2: any[] = [];
+
+      // First call creates new agent - no reuse message
+      getOrCreateHttpAgent(http.Agent, { keepAlive: true }, null, timeline1);
+      expect(timeline1.some((e) => e.message.includes('Reusing cached agent'))).toBe(false);
+
+      // Second call reuses cached agent - should log reuse message with connection reuse
+      getOrCreateHttpAgent(http.Agent, { keepAlive: true }, null, timeline2);
+      expect(timeline2.some((e) => e.message.includes('Reusing cached agent'))).toBe(true);
+      expect(timeline2.some((e) => e.message.includes('connection reuse'))).toBe(true);
+    });
+
     it('logs SSL validation status on agent creation', () => {
       const timeline: any[] = [];
       getOrCreateAgent(https.Agent, { rejectUnauthorized: true }, null, timeline);

packages/bruno-requests/src/utils/agent-cache.ts

@@ -154,7 +154,8 @@ function getOrCreateAgentInternal<TOptions extends HttpAgentOptions>(
   proxyUri: string | null,
   timeline: TimelineEntry[] | null,
   getCacheKey: CacheKeyFn<TOptions>,
-  getTimelineClass: TimelineClassFn
+  getTimelineClass: TimelineClassFn,
+  cacheHitMessage: string
 ): HttpAgent | HttpsAgent {
   const agentClassId = getAgentClassId(BaseAgentClass);
   const cacheKey = getCacheKey(agentClassId, options, proxyUri);
@@ -172,6 +173,15 @@ function getOrCreateAgentInternal<TOptions extends HttpAgentOptions>(
       (agent as any).timeline = timeline;
     }
 
+    // Log that we're reusing a cached agent
+    if (timeline) {
+      timeline.push({
+        timestamp: new Date(),
+        type: 'info',
+        message: cacheHitMessage
+      });
+    }
+
     return agent;
   }
 
@@ -222,7 +232,8 @@ function getOrCreateAgent(
     proxyUri,
     timeline,
     getAgentCacheKey,
-    getTimelineAgentClass
+    getTimelineAgentClass,
+    'Reusing cached agent (SSL session reuse enabled)'
   );
 }
 
@@ -249,7 +260,8 @@ function getOrCreateHttpAgent(
     proxyUri,
     timeline,
     getHttpAgentCacheKey,
-    getTimelineHttpAgentClass
+    getTimelineHttpAgentClass,
+    'Reusing cached agent (connection reuse enabled)'
   ) as HttpAgent;
 }