Disable debug log aggregation by default (#4401)

* feature flag

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* fix

---------

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: pwang347

package.json

@@ -3216,6 +3216,15 @@
 							"preview",
 							"onExp"
 						]
+					},
+					"github.copilot.agentDebugLog.enabled": {
+						"type": "boolean",
+						"default": false,
+						"markdownDescription": "%github.copilot.config.agentDebugLog.enabled%",
+						"tags": [
+							"preview",
+							"onExp"
+						]
 					}
 				}
 			},

package.nls.json

@@ -386,6 +386,7 @@
 	"github.copilot.config.instantApply.shortContextLimit": "Token limit for short context instant apply.",
 	"github.copilot.config.summarizeAgentConversationHistoryThreshold": "Threshold for compacting agent conversation history.",
 	"github.copilot.config.agentHistorySummarizationMode": "Mode for agent history summarization.",
+	"github.copilot.config.agentDebugLog.enabled": "When enabled, collect agent request information (tool calls, LLM requests, token usage, and errors) for viewing and troubleshooting in VS Code. Requires window reload to take effect.",
 	"github.copilot.config.backgroundCompaction": "Enable background compaction of conversation history.",
 	"github.copilot.config.agentHistorySummarizationWithPromptCache": "Use prompt caching for agent history summarization.",
 	"github.copilot.config.agentHistorySummarizationForceGpt41": "Force GPT-4.1 for agent history summarization.",

src/extension/trajectory/vscode-node/otelChatDebugLogProvider.ts

@@ -4,8 +4,10 @@
  *--------------------------------------------------------------------------------------------*/
 
 import * as vscode from 'vscode';
+import { ConfigKey, IConfigurationService } from '../../../platform/configuration/common/configurationService';
 import { ILogService } from '../../../platform/log/common/logService';
 import { IOTelService, type ICompletedSpanData, type ISpanEventData } from '../../../platform/otel/common/otelService';
+import { IExperimentationService } from '../../../platform/telemetry/common/nullExperimentationService';
 import { Disposable } from '../../../util/vs/base/common/lifecycle';
 import { IExtensionContribution } from '../../common/contributions';
 import {
@@ -130,9 +132,15 @@ export class OTelChatDebugLogProviderContribution extends Disposable implements
 	constructor(
 		@IOTelService private readonly _otelService: IOTelService,
 		@ILogService private readonly _logService: ILogService,
+		@IConfigurationService private readonly _configurationService: IConfigurationService,
+		@IExperimentationService private readonly _experimentationService: IExperimentationService,
 	) {
 		super();
 
+		if (!this._configurationService.getExperimentBasedConfig(ConfigKey.AgentDebugLogEnabled, this._experimentationService)) {
+			return;
+		}
+
 		// Listen for completed spans and bucket by session
 		this._register(this._otelService.onDidCompleteSpan(span => {
 			this._onSpanCompleted(span);

src/platform/configuration/common/configurationService.ts

@@ -919,6 +919,7 @@ export namespace ConfigKey {
 	export const AutomaticRenameSuggestions = defineSetting('renameSuggestions.triggerAutomatically', ConfigType.Simple, true);
 	export const TerminalToDebuggerEnabled = defineSetting('chat.copilotDebugCommand.enabled', ConfigType.Simple, true);
 	export const CodeSearchAgentEnabled = defineSetting<boolean>('chat.codesearch.enabled', ConfigType.Simple, false);
+	export const AgentDebugLogEnabled = defineSetting<boolean>('agentDebugLog.enabled', ConfigType.ExperimentBased, false);
 	export const ClaudeAgentEnabled = defineSetting<boolean>('chat.claudeAgent.enabled', ConfigType.Simple, true);
 	export const ClaudeAgentAllowDangerouslySkipPermissions = defineSetting<boolean>('chat.claudeAgent.allowDangerouslySkipPermissions', ConfigType.Simple, false);
 	export const InlineEditsEnabled = defineSetting<boolean>('nextEditSuggestions.enabled', ConfigType.ExperimentBased, true);