Why: establish the authorized task workspace and its initial baseline.
Evidence: preserved precheck receipt in .task/feature-fast-slow-display-design.md; R0=4bf6e4a0cf8b509320d54de2a6a41c5abb2f5bba.
Impact: task metadata only; the feature workspace starts at 4bf6e4a0cf.
Refs: .task/feature-fast-slow-display-design.md