fix: prevent context condensing on settings save when provider/model unchanged (#9108)

Co-authored-by: Matt Rubens <mrubens@users.noreply.github.com>

Author: daniel-lxs

src/core/webview/ClineProvider.ts

@@ -42,6 +42,7 @@ import {
 	ORGANIZATION_ALLOW_ALL,
 	DEFAULT_MODES,
 	DEFAULT_CHECKPOINT_TIMEOUT_SECONDS,
+	getModelId,
 } from "@roo-code/types"
 import { TelemetryService } from "@roo-code/telemetry"
 import { CloudService, BridgeOrchestrator, getRooCodeApiUrl } from "@roo-code/cloud"
@@ -1295,6 +1296,31 @@ export class ClineProvider
 
 	// Provider Profile Management
 
+	/**
+	 * Updates the current task's API handler if the provider or model has changed.
+	 * This prevents unnecessary context condensing when only non-model settings change.
+	 * @param providerSettings The new provider settings to apply
+	 */
+	private updateTaskApiHandlerIfNeeded(providerSettings: ProviderSettings): void {
+		const task = this.getCurrentTask()
+
+		if (task && task.apiConfiguration) {
+			// Only rebuild API handler if provider or model actually changed
+			// to avoid triggering unnecessary context condensing
+			const currentProvider = task.apiConfiguration.apiProvider
+			const newProvider = providerSettings.apiProvider
+			const currentModelId = getModelId(task.apiConfiguration)
+			const newModelId = getModelId(providerSettings)
+
+			if (currentProvider !== newProvider || currentModelId !== newModelId) {
+				task.api = buildApiHandler(providerSettings)
+			}
+		} else if (task) {
+			// Fallback: rebuild if apiConfiguration is not available
+			task.api = buildApiHandler(providerSettings)
+		}
+	}
+
 	getProviderProfileEntries(): ProviderSettingsEntry[] {
 		return this.contextProxy.getValues().listApiConfigMeta || []
 	}
@@ -1342,11 +1368,7 @@ export class ClineProvider
 
 				// Change the provider for the current task.
 				// TODO: We should rename `buildApiHandler` for clarity (e.g. `getProviderClient`).
-				const task = this.getCurrentTask()
-
-				if (task) {
-					task.api = buildApiHandler(providerSettings)
-				}
+				this.updateTaskApiHandlerIfNeeded(providerSettings)
 			} else {
 				await this.updateGlobalState("listApiConfigMeta", await this.providerSettingsManager.listConfig())
 			}
@@ -1403,11 +1425,7 @@ export class ClineProvider
 		}
 
 		// Change the provider for the current task.
-		const task = this.getCurrentTask()
-
-		if (task) {
-			task.api = buildApiHandler(providerSettings)
-		}
+		this.updateTaskApiHandlerIfNeeded(providerSettings)
 
 		await this.postStateToWebview()