[TomCC7]

Generated message types on the existing WebRTCTransport.spec(channel, Type) and CloudflareTransport APIs now use CDR inside the shared data-frame envelope. Type metadata demultiplexes a physical command channel; raw bytes and explicitly legacy types retain their separate codecs, without decoder fallback. No transport API or provider lifecycle change.

Parent: #4707. Part of Message encoding refactor.

The installed serializer accepts arbitrary encapsulation prefixes. Reviewed LCM/Zenoh, WebRTC, WebXR-frame, CdrCodec and explicit converter entrypoints now require plain XCDR1 (either endianness) before field decoding. This is a scoped boundary fix, not a claim that every registry caller has been audited.

Category	Files	Added	Removed
Transport and message boundary validation	4	92	22
Storage/conversion validation	2	4	2
Behavioral regression tests	5	190	3
Existing CI and hosted documentation	2	24	0

Validation at this commit: 247 source +247 installed-wheel tests, six production files strict mypy, applicable hooks, wheel build. Nix lint unavailable (nix absent). Installed store APIs also read all 4,451 stairs and 2,546 Go2-short previously converted real observations. Full current wheel SHA256: bfff105d72cd06652837498ad3c8fc2bb9d2aa899cb76d5c6ad192791d2dde7a.

Offline manual check from a configured checkout (no broker or robot):

DIMOS_TRANSPORT=lcm LCM_DEFAULT_URL=memq:// uv run pytest --noconftest --import-mode=importlib -o addopts= -q \
  dimos/protocol/pubsub/impl/webrtc/test_transport.py \
  dimos/core/test_cdr_transport.py dimos/memory/codecs/test_codecs.py

The WebRTC tests mock only the external provider; typed framing, registry codecs, multiplexing, malformed-frame recovery, wrong-class rejection, pickle/config sharing and sequence ownership run normally. Existing WebXR regressions run the shipped browser encoder offline with pinned Foxglove parsers. This is not live SFU/operator or hardware acceptance. No CI polling or benchmark result is claimed. Remaining hosted Go2/map/stats/recorder, simulation/robot graph closure and Gate B dependency retirement follow independently.