Why:
An immutable npm lock caches tarballs but packed consumers also require resolver metadata before candidate execution.
Evidence:
SELF host replay passed 57 composition and CI credential cases; real npm 10 and 11 cold-cache consumers passed without lock changes.
Impact:
Acquire only installed exact-version npmjs metadata with clean config, preserve cache paths for offline execution, adopt the repaired Frontend source and record immutable CI fixtures.
Refs:
R6-R8, R14; dependency-workspace U4/U5; UI 63d289e and Frontend 5467517