A push-triggered first deploy cannot set the first_deploy input, and the domain answers 403/1014 until the Pages project exists. 1014 means nothing exists to preserve, so handle it like a 404. Other 403s still abort. Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01JdMNbY5hLR7FjtfEE712xG