You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Cloud SessionsArea: what it touches
ImprovementsKind: in v2.1.247,
ImprovementsSection of the release
What
A new refusal reason covers checkouts that are linked working trees or keep their git directory elsewhere. Those sessions are deferred instead of probed, get their own preface saying nothing syncs back and the session cannot push to GitHub, and the remedy suggests starting from the repository's main checkout or an ordinary clone.
Details
The reason is recorded as layout_unserved.
Evidence
start from the repository's main checkout
Strings lifted out of the shipped bundle, so the claim above can be checked against them.