An unguarded vector parses as a real artifact, so Fossil crosslinks it into every clone -- two check-ins, a technote, twelve sub-manifest slices and a phantom pair that sync chases forever. Each vector now carries a leading # block; rfc_vectors.zig strips it at comptime so callers still see the exact RFC bytes.

Background and the cleanup that follows: see wiki page 'rfc-vector-ledger'. closed check-in: 32ef56aaf4 user: dmestas tags: rfc-vector-guard