Lands M2 wave 2 — two pure-Rust body-codec modules under
crates/mxaccess-rpc, plus a small inline ORPC framing port and a
crate-level type consolidation. Resolves F7+F8 from wave 1.
New modules
- guid.rs (4 tests) — hoisted from objref::Guid; shared by all of
mxaccess-rpc. Resolves F7.
- error.rs — hoisted RpcError union (ShortRead, UnexpectedPacketType,
UnknownPacketType, InvalidFragmentLength, TruncatedBindBody,
InvalidAuthTrailer, MissingAuthValue, Decode). Resolves F8.
- orpc.rs (8 tests) — port of OrpcStructures.cs:1-141. ComVersion,
OrpcThis (32-byte header), OrpcThat (8-byte header),
MInterfacePointer (length-prefixed OBJREF), StdObjRef (40 bytes).
- object_exporter.rs (~530 LoC, 20 tests) — port of
ObjectExporterMessages.cs:1-141. IObjectExporter IID, opnums,
ResolveOxid request encoder + ResolveOxidResult/Failure parsers.
Owned-string protocol labels cleaned up via Cow upgrade rather than
Box::leak (ComDualStringEntry::protocol is now Cow<'static, str>).
- rem_unknown.rs (~340 LoC, 11 tests) — port of RemUnknownMessages.cs.
IRemUnknown IID, RemQueryInterface request/response, RemQiResult.
4-byte NDR pad in REMQIRESULT preserved as pad_after_hresult per
CLAUDE.md unknown-bytes rule.
Test count delta: 277 -> 319 (+42; codec 215 unchanged, mxaccess-rpc
60 -> 102, codec parity 2 unchanged).
Open followups touched: F7 + F8 resolved; F9, F10, F11 added.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Joseph Doherty
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