fix(patch): cherry-pick 0135b03 to release/v0.33.0-preview.2-pr-21171 [CONFLICTS] (#21336)

Co-authored-by: Shreya Keshive <shreyakeshive@google.com>

packages/cli/src/config/config.ts

@@ -81,7 +81,8 @@ export interface CliArgs {
   policy: string[] | undefined;
   allowedMcpServerNames: string[] | undefined;
   allowedTools: string[] | undefined;
-  experimentalAcp: boolean | undefined;
+  acp?: boolean;
+  experimentalAcp?: boolean;
   extensions: string[] | undefined;
   listExtensions: boolean | undefined;
   resume: string | typeof RESUME_LATEST | undefined;
@@ -177,10 +178,15 @@ export async function parseArguments(
                 .filter(Boolean),
             ),
         })
-        .option('experimental-acp', {
+        .option('acp', {
           type: 'boolean',
           description: 'Starts the agent in ACP mode',
         })
+        .option('experimental-acp', {
+          type: 'boolean',
+          description:
+            'Starts the agent in ACP mode (deprecated, use --acp instead)',
+        })
         .option('allowed-mcp-server-names', {
           type: 'array',
           string: true,
@@ -632,6 +638,7 @@ export async function loadCliConfig(
   // -i/--prompt-interactive forces interactive mode with an initial prompt
   const interactive =
     !!argv.promptInteractive ||
+    !!argv.acp ||
     !!argv.experimentalAcp ||
     (!isHeadlessMode({ prompt: argv.prompt, query: argv.query }) &&
       !argv.isCommand);
@@ -758,6 +765,7 @@ export async function loadCliConfig(
   }
 
   return new Config({
+    acpMode: !!argv.acp || !!argv.experimentalAcp,
     sessionId,
     clientVersion: await getVersion(),
     embeddingModel: DEFAULT_GEMINI_EMBEDDING_MODEL,
@@ -821,7 +829,7 @@ export async function loadCliConfig(
     bugCommand: settings.advanced?.bugCommand,
     model: resolvedModel,
     maxSessionTurns: settings.model?.maxSessionTurns,
-    experimentalZedIntegration: argv.experimentalAcp || false,
+
     listExtensions: argv.listExtensions || false,
     listSessions: argv.listSessions || false,
     deleteSession: argv.deleteSession,