# Phase 1.0AX: host-only AV protocol and cleanup model

Status: `HOST_REFERENCE_MODEL_COMPLETE_TARGET_SOURCE_AND_ARTIFACT_BLOCKED`

Date: 2026-07-29

AX turns AW's source requirements into an exact bytes-only reference model.
Frames remain 64-byte, big-endian and CRC-bound over the first 60 bytes, but
use `CHD10AV1`. Historical wire values are preserved and D14 is appended at
stage value 30. D12 cannot carry the terminal flag; only a final D14 can.

D14 records the current initialized mask, cleaned mask, `rarch_main` result,
cleanup-order errors and the independent cleanup-failure count. It is generated
only when `rarch_main` returned, D04 was emitted, phase S15 was reached, no
subsystem remains initialized and both cleanup error counts are zero.

The trace layer requires exactly one D07, D04 and final D14 in that order,
strictly increasing sequence values, at most one D12 and no post-terminal data.
All 64 single-byte mutations fail CRC or canonical parsing. Correctly
rechecksummed but false cleanup claims also fail.

This is Python byte processing only. It creates no target profile, source,
artifact, socket, process, output file, address or authorization. Passing it
proves neither target equivalence nor firmware behavior.