Why: establish the authorized task workspace and its initial baseline.
Evidence: preserved precheck receipt in .task/feature-ext8-slice2-shared-retrieval.md; R0=749f327986f30a953fb6723b6970c42738a572af.
Impact: task metadata only; the feature workspace starts at 749f327986.
Refs: .task/feature-ext8-slice2-shared-retrieval.md