Why:
An attempted shared digest import introduced a workspace package requirement in standalone fixed-root product fixtures.
Evidence:
SELF task receipts record the actual ModuleNotFoundError followed by all 20 real Git/Go/npm composition cases passing after restoring the local helper.
Impact:
Preserve standalone operation and retain the behavior-preserving unused parameter/import cleanup.
Refs:
Agent-System-Dev dependency-workspace U5; SELF composition receipt 5b7c224d67ab248b685da436ebee56638c1945a1dca3666f40e763621c1b8003.