Test names encode intent — prose descriptions add zero information.
Per AX-2: if comment restates the signature, delete it.
Co-Authored-By: Charon <charon@lethean.io>
AX Principle 2 — comments must be usage examples, not prose descriptions.
The leading "verifies a well-formed signed frame" line restated the test
name without adding information; the usage example below it was sufficient.
Co-Authored-By: Charon <charon@lethean.io>
One test file per source file is mandatory per AX conventions. reader.go
had no corresponding test file — this adds the three required test cases
covering valid round-trip, tampered frame rejection, and wrong-secret rejection.
Co-Authored-By: Charon <charon@lethean.io>