Iter 21 — ultra-opt for protocol correctness across the two production
decoders. Pin the same 32-byte canonical hex in both Python and Rust
tests; if either decoder drifts from the wire, ONE of the tests starts
failing — and it's clear which side moved.
Canonical packet: COM9 sync-pkt #1 from §A0.12 live capture, expressed
as exact little-endian bytes:
10a111c5 09 01 06 00 magic + node + ver + flags + rsvd
f26db70100000000 local_us = 28_798_450
c5aca50100000000 epoch_us = 27_634_885
1400000000000000 sequence = 20 + reserved
Python test:
archive/v1/tests/unit/test_esp32_binary_parser.py::TestSyncPacketParser
::test_canonical_wire_bytes_match_rust_decoder
— decodes the pinned hex, asserts every field including the §A0.10
1,163,565 µs offset.
Rust test:
v2/crates/wifi-densepose-hardware/src/sync_packet.rs::tests
::canonical_wire_bytes_match_python_decoder
— decodes the same bytes, asserts the same fields, then re-encodes
via to_bytes() and asserts the round-trip produces the EXACT same
32 bytes. So this also catches drift in the Rust encoder.
Test counts after this iter:
Rust sync_packet: 15/15 green (was 14)
Python SyncPacketParser: 7/7 green (was 6)
Branch contract: if a future PR changes the firmware wire format, BOTH
tests must be updated atomically with the new canonical hex. CI will
gate this naturally.
Co-Authored-By: claude-flow <ruv@ruv.net>
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