Why: establish the authorized task workspace and its initial baseline.
Evidence: preserved precheck receipt in .task/feature-fast-slow-o2-a01-p5-record.md; R0=0289bbeabbaedcab8afcd25422be002843df9971.
Impact: task metadata only; the feature workspace starts at 0289bbeabb.
Refs: .task/feature-fast-slow-o2-a01-p5-record.md