Source finding from PR #1049 documentation refresh: request_ext is guarded as a reserved field but imp_ext is not, despite prior documentation claiming protection for both.
Acceptance: decide whether imp_ext is reserved, align implementation and documentation, and add positive and negative tests that lock the chosen behavior.
Source finding from PR #1049 documentation refresh: request_ext is guarded as a reserved field but imp_ext is not, despite prior documentation claiming protection for both.
Acceptance: decide whether imp_ext is reserved, align implementation and documentation, and add positive and negative tests that lock the chosen behavior.