T0.0 — Example report (delete me)

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Status: Pending Review Agent: claude-haiku-4-5 Started: 2026-05-11T14:22:00Z Completed: 2026-05-11T15:08:00Z Commit: 0000000000000000000000000000000000000000 PRD: ../PRD-wire-format-v2.md

What I changed

crates/wzp-proto/src/packet.rs:20-47 — Renamed existing MediaHeader to MediaHeaderV1.
crates/wzp-proto/src/packet.rs:50-110 — Added v2 MediaHeader (16 B, byte-aligned) with write_to / read_from.
crates/wzp-proto/src/packet.rs:1450-1480 — Added media_header_v2_roundtrip test.

Why these choices

Followed steps T0.0.1 through T0.0.5 without deviation. MediaType::from_wire returning Option (not Result) matches the existing pattern in CodecId::from_wire; chose consistency over typed errors here.

Deviations from the task spec

None.

Verification output

$ cargo test -p wzp-proto media_header_v2_roundtrip
   Compiling wzp-proto v0.1.0
    Finished `test` profile [unoptimized + debuginfo] target(s) in 4.2s
     Running unittests src/lib.rs

running 1 test
test packet::tests::media_header_v2_roundtrip ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 318 filtered out

$ cargo build --workspace
   Compiling wzp-proto v0.1.0
   ...
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.8s

Test summary

Tests added: 1 (media_header_v2_roundtrip)
Tests modified: 0
Workspace test count before: 272 / after: 273
cargo clippy --workspace --all-targets -- -D warnings: pass
cargo fmt --all -- --check: pass

Risks / follow-ups

MediaType is referenced from the new MediaHeader::read_from but is implemented separately in T1.2. T1.2 must land before any other crate can import the v2 type. Status board reflects this — T1.2 should be picked up next.

Reviewer checklist (filled in by reviewer)

Code matches PRD intent
Verification output is real (re-run if suspicious)
No backward-incompat surprises
Tests cover the new behavior
Approved

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