# Pagination Value Types Review

## Scope

- Issue: #33
- Milestone: 0.2.0
- Changed surface: `bluetape-rs-collections`
- Reference checked: `PaginatedList.kt` and `PaginatedListTest.kt` in
  `bluetape4k-projects/bluetape4k/core`

## 7-Tier Review

| Tier | Result | Evidence |
| --- | --- | --- |
| API contract | Pass | `Page<T>` is a value type with explicit page metadata; DB, SQL, and cursor pagination are out of scope. |
| Rust idioms | Pass | Uses `u64` for non-negative metadata, typed `PageError`, `Result` constructors, slices for borrowed access, and owned `Vec<T>` for materialized pages. |
| Error handling | Pass | `page_size == 0` returns `PageError::InvalidPageSize`; negative values are excluded by type. |
| Documentation | Pass | Public API has Rustdoc examples and README usage. |
| Tests | Pass | Unit tests cover defaults, total-page rounding, zero totals, invalid page size, and owned item extraction. |
| Compatibility | Pass | No new dependencies or feature flags. |
| Risk | Low | New module and exports only; existing helpers unchanged. |

## Findings

- P0: 0
- P1: 0
- P2: 0
- P3: 0

## Validation

- Pass: `cargo fmt --all --check`
- Pass: `cargo test -p bluetape-rs-collections`
- 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: `git diff --check`
