# 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