Stop logging ACP non-JSON stdout previews

packages/server/src/server/agent/provider-launch-config.ts

@@ -148,9 +148,6 @@ export function migrateProviderSettings(
     const nextEntry: ProviderOverride = {};
     const command = parsedOld.data.command;
     if (command?.mode === "append") {
-      console.warn(
-        `[Config] Skipping legacy agents.providers.${providerId}.command append mode during provider override migration because it cannot be auto-migrated.`,
-      );
       continue;
     }
     if (command?.mode === "replace") {

packages/server/src/server/agent/providers/acp-agent.test.ts

@@ -72,10 +72,10 @@ describe("createLoggedNdJsonStream", () => {
     expect(logger.warn).toHaveBeenCalledWith(
       expect.objectContaining({
         provider: "gemini",
-        linePreview: "Please visit the following URL to authorize the application:",
       }),
       "ACP agent emitted non-JSON stdout; ignoring line",
     );
+    expect(logger.warn.mock.calls[0]?.[0]).not.toHaveProperty("linePreview");
     expect(consoleError).not.toHaveBeenCalled();
 
     await writer.close();

packages/server/src/server/agent/providers/acp-agent.ts

@@ -153,8 +153,6 @@ export function createLoggedNdJsonStream(
                 {
                   err: error,
                   provider: options.provider,
-                  linePreview:
-                    trimmedLine.length > 500 ? `${trimmedLine.slice(0, 500)}...` : trimmedLine,
                 },
                 "ACP agent emitted non-JSON stdout; ignoring line",
               );