Eighteen places read HOME or APPDATA with an empty default, so under systemd or a sandbox the server reads KiCad config and sym-lib-table from whatever directory it started in, with no warning.
From the Grok pain-radar digests, Oct 27-28 2026 (Oct 27 8:41 AM ET through Oct 28 7:41 AM ET digests plus the Haitch editions). Verified live 2026-10-28: issue/PR/thread read; title and state confirmed.