core.filemode=false in this worktree meant the initial commit recorded
git-credential-mosaic, test-git-credential-mosaic.sh, and
test-gitea-token-identity.sh as 100644. git invokes a path-configured
credential.helper directly (exec, not `sh <path>`), so git-credential-mosaic
must carry the executable bit; the two test scripts match the 100755
convention already used by the other test-*.sh harnesses in this directory.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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