cargo clippy --fix applied style nits (redundant return, ?-operator, map_or simplify) plus doc-comment list indentation. The full ./check gate (fmt+test+clippy -D warnings) now passes; R5 read-gate + grant tests remain green (39 cubesys lib tests).
Add a delegated-grant auth layer: - cubesys/src/grants.rs: Grant/Owner/Perm model, GRANT_BUCKET at Czyx::new(0,1,0,1), grant/revoke/grant_allows, std-only JSON codec. - Stored via put_record with a doc_type='grant-table' header so it survives checkpoint/restore (raw put_raw was dropped on dump_store). - commands.rs: GRANT/REVOKE opcodes + admit_mutate() enforcement hook (owner -> grant -> deny). GRANT/REVOKE require HELLO identity under --require-identity. - Enforce owner-match contract preserved (legacy/tests stay green). - 11 new grant tests; full ./check quick = 115 pass, clippy -D clean.