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It set `git config --local credential.helper "store --file=$HOME/..."`, which PERSISTS in the repository. The repo is a bind mount the host also uses, so the host's git inherited `store --file=/sylph-home/port/.git-credentials` -- a path that exists only inside the container -- and every host push then failed with `unable to get credential storage lock: No such file or directory`. Same root as the EBUSY credential error, from the other side: a tool that configures a shared repository to suit itself breaks every other user of that repository. Now applied with `-c` to the single push invocation. Cleared the leaked setting from both checkouts by hand. Syplheed-Reborn had it too, from the RE container's copy of this script. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>