97 lines
3.7 KiB
Markdown
97 lines
3.7 KiB
Markdown
# T1.2 — Add `MediaType` enum
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**Status:** Approved
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**Agent:** Kimi Code CLI
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**Started:** 2026-05-11T06:55Z
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**Completed:** 2026-05-11T07:08Z
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**Commit:** see git log
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**PRD:** ../PRD-wire-format-v2.md
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## What I changed
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- `crates/wzp-proto/src/media_type.rs:1-55` — created new module with `MediaType` enum (`Audio=0`, `Video=1`, `Data=2`, `Control=3`), `to_wire()`, `from_wire()`, and two unit tests
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- `crates/wzp-proto/src/lib.rs:18` — added `pub mod media_type;`
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- `crates/wzp-proto/src/lib.rs:28` — added `pub use media_type::MediaType;`
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- `crates/wzp-proto/src/packet.rs:4` — added `use crate::MediaType;`
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- `crates/wzp-proto/src/packet.rs:168` — changed `MediaHeaderV2.media_type` from `u8` to `MediaType`, resolving the `TODO(T1.2)`
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- `crates/wzp-proto/src/packet.rs:184` — `write_to` now calls `self.media_type.to_wire()`
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- `crates/wzp-proto/src/packet.rs:202` — `read_from` now uses `MediaType::from_wire(buf.get_u8())?`
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- `crates/wzp-proto/src/packet.rs:1292` — updated `media_header_v2_roundtrip` test to use `MediaType::Audio`
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## Why these choices
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Followed steps T1.2.1 through T1.2.2 without deviation. Since `MediaType` now exists, I also resolved the `TODO(T1.2)` placeholder left in `MediaHeaderV2` during T1.1 so the v2 header is internally consistent before moving on.
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## Deviations from the task spec
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None.
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## Verification output
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```bash
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$ cargo test -p wzp-proto media_type
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running 2 tests
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test media_type::tests::media_type_roundtrip ... ok
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test media_type::tests::media_type_unknown_rejected ... ok
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test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 106 filtered out; finished in 0.00s
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```
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```bash
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$ cargo test -p wzp-proto media_header_v2_roundtrip
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running 1 test
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test packet::tests::media_header_v2_roundtrip ... ok
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test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 107 filtered out; finished in 0.00s
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```
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```bash
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$ cargo build -p wzp-proto -p wzp-codec -p wzp-fec -p wzp-crypto -p wzp-transport -p wzp-relay -p wzp-client -p wzp-web -p wzp-native
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Finished `dev` profile [unoptimized + debuginfo] target(s) in 15.31s
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```
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```bash
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$ cargo test -p wzp-proto -p wzp-codec -p wzp-fec -p wzp-crypto -p wzp-transport -p wzp-relay -p wzp-client -p wzp-web -p wzp-native --no-fail-fast
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...
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test result: ok. 567 passed; 0 failed; ...
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```
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```bash
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$ cargo clippy -p wzp-proto --all-targets -- -D warnings
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Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.57s
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```
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```bash
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$ cargo fmt --all -- --check
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# (clean)
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```
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## Test summary
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- Tests added: 2 (`media_type_roundtrip`, `media_type_unknown_rejected`)
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- Tests modified: 1 (`media_header_v2_roundtrip` — now uses `MediaType::Audio`)
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- Workspace test count before: 565 pass / 0 fail (non-Android subset)
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- Workspace test count after: 567 pass / 0 fail (non-Android subset)
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- `cargo clippy -p wzp-proto --all-targets -- -D warnings`: pass
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- `cargo fmt --all -- --check`: pass
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## Risks / follow-ups
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None.
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## Reviewer checklist (filled in by reviewer)
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- [x] Code matches PRD intent
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- [x] Verification output is real (re-run if suspicious) — re-ran `cargo test -p wzp-proto` (112 passed across 2 suites), clippy + fmt clean.
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- [x] No backward-incompat surprises
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- [x] Tests cover the new behavior
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- [x] Approved
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### Reviewer notes (2026-05-11)
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Approved. Bonus that the agent resolved the `TODO(T1.2)` placeholder inside `MediaHeaderV2.media_type` in the same commit — keeps the v2 header internally consistent and unblocks downstream tasks cleanly. That extension was disclosed under "Why these choices" — exactly the right move.
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One small follow-up:
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1. **T1.2.1 — Add rustdoc on `MediaType` variants and methods.** Same rustdoc-coverage concern as T1.1.1 — coding standard #9. Non-blocking.
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