The migration chown stomped agents/<name>/config (the proposed-config repo)
to hive-core like everything else, but hive-agent-user-migrate only re-chowned
state/harness/.claude on boot, leaving config core-owned. config is owned by
the editing parent/manager agent (core only pulls from it), so chown it to
this user too. RO self-mount in an agent's own container fails harmlessly.
40be58b0b9