X_ERROR_FIX_PATH_MISSING
Means
an error's fix line cites a file this repository does not have
Typical cause
the errors step read a fix: naming a path or a glob and resolved it against the root the gate is running in. Only x <command> citations were checked until 2026-08, so a fix telling its reader to open a file that was moved, renamed or never written passed every gate — the live instance was X_UI_RUNTIME_MISSING, whose fix named a line no generator emitted. Narrow on purpose: a scoped specifier (@ultimat3/ui/global.scss), a dot-relative path (./global.scss) and any path whose parent directory this repo does not have (src/errors.ts, apps/web/server.ts — those name a directory the reader's app has) are not judged at all; since 19.1.1 neither is a path under a directory the root .gitignore never commits (.personal/fleet.yml) — private by design, present on a developer's disk and absent on CI
Fix
the fix names the offending <file>:<line> — correct the path to one this repo holds, or create the file it names