Still not working for me. Still the same error. I only had the --acp argument before. I have the latest version of copilot and Xcode 26.6 RC $ copilot --version GitHub Copilot CLI 1.0.61. Xcode Agent Config: Name: Github Copilot Executable: ...path to $(which copilot) Interpreter: Arguments: --acp Environment Variables: I am able to start a normal copilot session in Terminal in the same working folder and it is authenticated and works as expected.

Also get the same thing on Xcode 26.6 RC and Xcode 27 trying to use GitHub Copilot CLI. JSON-RPC request with ID JSONRPCID(rawValue: "8848B1CB-E942-47A8-B53E-36E5E40735CB", intValue: nil) failed to produce a response.

Seeing the same thing. Started for me around October 14th.

The format suggested by Nobitahuang seems true. From the documentation example, it only seems needed on "some" ids. Specifically, for ids of type inAppPurchasePrices https://developer.apple.com/documentation/appstoreconnectapi/managing-in-app-purchases#Update-in-app-purchase-prices ... "manualPrices": { "data": [ { "type": "inAppPurchasePrices", "id": "${prices-id}" }, .... "included": [ { "type": "inAppPurchasePrices", "id": "${prices-id}", Adding the id inside the ${} literal works in Swift string interpolation "${\(inAppPurchasePricesId)}"

Also started seeing this around 2025-09-05. Using the manualPrice id returned from a previous relationships/manualPrices result. Error: Request https://api.appstoreconnect.apple.com/v1/inAppPurchasePriceSchedules failed with status code 409. Related response error(s): The request failed with response code 409 ENTITY_ERROR.INCLUDED.INVALID_ID The provided entity id is invalid. The provided included entity id 'eyJzIjoiNjQ1MTIxNzg3OSIsInQiOiJVU0EiLCJwIjoiMTAwOTQiLCJzZCI6MC4wLCJlZCI6MC4wfQ' has invalid format).