Completed items in this epic. E05 closed 2026-05-25 (single-item scope: ship CHEATSHEET.md at repo root; 97 lines at close, recorded here as “~80” until corrected 2026-08-19). The cheatsheet was authored directly in v1.15.0 without a numbered BL-#### item, per the maintainer-authored single-deliverable shape noted in the charter. See ../../../CHEATSHEET.md for the shipped artifact.