chore: hide parallel tool calls experiment and disable feature

- Hide MULTIPLE_NATIVE_TOOL_CALLS from experimental settings UI
- Force parallelToolCallsEnabled to false in Task.ts
- Force isMultipleNativeToolCallsEnabled to false in presentAssistantMessage.ts
- Feature is on hold, existing users with setting enabled will have it ignored

Author: hannesrudolph

src/core/assistant-message/presentAssistantMessage.ts

@@ -478,13 +478,9 @@ export async function presentAssistantMessage(cline: Task) {
 			const toolCallId = (block as any).id
 			const toolProtocol = toolCallId ? TOOL_PROTOCOL.NATIVE : TOOL_PROTOCOL.XML
 
-			// Check experimental setting for multiple native tool calls
-			const provider = cline.providerRef.deref()
-			const state = await provider?.getState()
-			const isMultipleNativeToolCallsEnabled = experiments.isEnabled(
-				state?.experiments ?? {},
-				EXPERIMENT_IDS.MULTIPLE_NATIVE_TOOL_CALLS,
-			)
+			// Multiple native tool calls feature is on hold - always disabled
+			// Previously resolved from experiments.isEnabled(..., EXPERIMENT_IDS.MULTIPLE_NATIVE_TOOL_CALLS)
+			const isMultipleNativeToolCallsEnabled = false
 
 			const pushToolResult = (content: ToolResponse) => {
 				if (toolProtocol === TOOL_PROTOCOL.NATIVE) {

src/core/task/Task.ts

@@ -3610,11 +3610,9 @@ export class Task extends EventEmitter<TaskEvents> implements TaskLike {
 			})
 		}
 
-		// Resolve parallel tool calls setting from experiment (will move to per-API-profile setting later)
-		const parallelToolCallsEnabled = experiments.isEnabled(
-			state?.experiments ?? {},
-			EXPERIMENT_IDS.MULTIPLE_NATIVE_TOOL_CALLS,
-		)
+		// Parallel tool calls are disabled - feature is on hold
+		// Previously resolved from experiments.isEnabled(..., EXPERIMENT_IDS.MULTIPLE_NATIVE_TOOL_CALLS)
+		const parallelToolCallsEnabled = false
 
 		const metadata: ApiHandlerCreateMessageMetadata = {
 			mode: mode,

webview-ui/src/components/settings/ExperimentalSettings.tsx

@@ -55,6 +55,8 @@ export const ExperimentalSettings = ({
 			<Section>
 				{Object.entries(experimentConfigsMap)
 					.filter(([key]) => key in EXPERIMENT_IDS)
+					// Hide MULTIPLE_NATIVE_TOOL_CALLS - feature is on hold
+					.filter(([key]) => key !== "MULTIPLE_NATIVE_TOOL_CALLS")
 					.map((config) => {
 						if (config[0] === "MULTI_FILE_APPLY_DIFF") {
 							return (