gbrain's release:restamp rewrites its plugin manifests and VERSION; its
base's .gstack/pregate.json declares no lane for them, and pregate reads
policy from the base, so every restamp PR failed lanes with
PREGATE_NO_LANE and could not fix itself (gbrain PRs 7625 and 7606).
lib/pregate/stamp-only.ts defines version-stamp-only per file kind: a JSON
document of the same shape whose every changed leaf is a bare version under
a key named for a version; plist <string> versions under a ...Version...
key; a VERSION file that is one bare version on both sides. lane-selection
applies it only after the import graph, the declarations, the regen
registry and both empty lanes found nothing; lanes prints the waived files
on their own line and --explain the per-file verdict. Anything else (a
changed description, a new key, a dependency pin, an added or deleted
manifest) keeps its PREGATE_NO_LANE.
Tests: pure rows for every rule, and bin fixtures for a stamp-only PR
(passes), a manifest with a changed description (refused), a mixed diff
(stamped files waived, the orphan source file still refused, a mapped file
still runs its test) and an added/deleted manifest.
Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>
