Xcode 26.3 RC - Claude Agent returns "Your request couldn't be completed"

Developer Tools & Services Xcode
JJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJ OP
Created 1w
Replies 2
Boosts 0
Views 131
Participants 3

Environment:

  • Xcode 26.3 RC
  • macOS 26.3 (25D125) (Apple Silicon / arm64)

Setup:

  • Xcode > Settings > Intelligence > Claude Agent: Signed In (account status shows "Signed In")
  • Model: Default

Steps to reproduce:

  1. Open a new chat in Xcode's Coding Assistant
  2. Select "Claude Agent" from the agent dropdown (instead of "Claude Sonnet 4.5")
  3. Send any message (e.g. "HI")

Expected result: Claude Agent responds normally.

Actual result: The message is sent but immediately returns the error: "Your request couldn't be completed."

🚩I have an active Claude Code subscription with remaining usage. Running claude in Terminal works perfectly, confirming the subscription and quota are valid.

Replies  2
Boosts  0
Views  131
Participants  3
Developer Tools Engineer OP
Apple
3d

I'm adding the "Coding intelligence" tag to make sure the Xcode team sees this. That tag is the best way to get more visibility on Xcode + agentic coding related issues!

1
Boomer OP
2h

Try 'logging' in with your API key. Xcode : Settings : Intelligence : Providers : Anthropic after downloading the Claude Agent. I wasn't able to use my free account by signing in but it works (for now) when I entered my API key

0
Xcode 26.3 RC - Claude Agent returns "Your request couldn't be completed"
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