Two more real gaps from the post-rebase review round: a detached
checkout reads its branch as the literal HEAD, so the integration guard
never fired and candidate selection could diff a detached tip on main
against develop; and the remote-default check only consulted origin, so
a fork-parent layout whose only remote is upstream lost the guard on
its default branch entirely.
The guard now treats a detached HEAD as no-diff-base, and default-branch
symrefs are collected from every remote (origin first), feeding both the
guard and the candidate list. Two failing-first tests cover a detached
tip beside a diverged develop and an upstream-only trunk default.
Prepared with AI assistance (Claude Code), directed by @pbakaus.
Co-Authored-By: Claude Code <noreply@anthropic.com>
Paul BakausandClaude Code
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