A third target in the committed runner, `realtime`, over
`packages/cultmesh-ts/src/realtime-wire.ts`, killed by that package's own
suite. It gets the machinery the other two already have: a no-op control
through the same write path, the sidecar and its verified restore, and the
post-restore rebuild that proves `dist/` no longer carries a mutant, with
`0x31545343` as the sentinel its last mutation removes.
Thirty-seven mutations, one per rule the codec owns: each header field's
offset, width and endianness; the field order the reference fixed; the magic,
the stamped header size and wire version; the delivery ordinal; UTF-8
identities and byte-counting length prefixes; the identity and payload
ceilings; the ALPN, the two QUIC error codes and the two stream kinds; the
four encode refusals from the transport contract; each decode refusal and the
order they fire in; the byte-order mark; and the two aliasing rules, that
decode reads only the viewed bytes of an offset view and that the decoded
payload does not alias the frame. A mutation that changes the encoding
symmetrically still dies, because the vector bytes were written on the other
side.
All seventy-two mutations across the three targets are killed and all three
controls are green.
One mutant is not listed and says why in the table, as the P1363 length guard
already did: removing `payloadLength < 0` from the decoder's length refusal is
equivalent. The clause mirrors the reference but cannot fire alone, because
reaching it means the frame is already 37 bytes and a negative length can then
never make the sum match. It survived when tried.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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