# Codec Crate Bootstrap Review

Date: 2026-06-10
Issue: #53
Branch: `feat/issue-53-codec-crate`

## Scope

Add the `0.3.0` codec crate boundary without implementing codec behavior:

- `crates/codec`
- root workspace registration
- root optional facade feature
- README and README.ko usage notes
- `Cargo.lock` workspace package entry

## 7-Tier Review

| Tier | Verdict | Evidence |
|---|---|---|
| 1. Public API / Contract | PASS | No encoder API is exposed yet. The only public change is the opt-in root facade feature `codec`; `default = ["core"]` remains unchanged. |
| 2. Architecture / Boundary | PASS | `crates/codec` is a focused crate boundary. Hex/Base64 work is documented as follow-up scope; compression and serde serialization are explicitly deferred to `0.4.0` and `0.5.0`. |
| 3. Rust API Shape | PASS | New crate uses Rust 2024 workspace metadata, no Kotlin/JVM or Go-shaped API, no broad utility module, no unsafe code, and no runtime/global state. |
| 4. Tests | PASS | `cargo test -p bluetape-rs-codec --all-features --locked` passes with the metadata smoke test. Full workspace tests pass. |
| 5. Static / Docs | PASS | `cargo fmt --all --check`, `git diff --check`, `cargo clippy --workspace --all-targets --all-features --locked -- -D warnings`, and rustdoc with `-D warnings` pass. |
| 6. Release / Cargo | PASS | `Cargo.toml` registers the new workspace member, workspace dependency, optional root dependency, and additive feature. `Cargo.lock` records `bluetape-rs-codec` `0.3.0`. |
| 7. Evidence Integrity | PASS | code-review-graph analyzed the staged diff against `origin/develop`: 8 files, risk score 0.00, changed functions 0, test gaps 0. |

## P0/P1 Gate

P0=0 P1=0

No P2/P3 follow-up is required for #53. Implementation work remains in the
already-created child issues #54 and #55.

## Validation

- `cargo fmt --all --check`: PASS
- `git diff --check`: PASS
- `cargo check --workspace --all-targets --all-features --locked`: PASS
- `cargo test -p bluetape-rs-codec --all-features --locked`: PASS
- `cargo test --workspace --all-features --locked`: PASS
- `cargo clippy --workspace --all-targets --all-features --locked -- -D warnings`: PASS
- `RUSTDOCFLAGS="-D warnings" cargo doc --workspace --no-deps --locked`: PASS
