# 1.0.0-beta.12 Release Review

Status: ready for publication after controller release gate.

## Verdict

No blocking issues found in the current beta12 worktree. The slice is correctly
framed as concrete vector source-helper parity and can proceed to the final
publication gate.

## Scope Checked

- `lib/std/vec_i64.slo` exports and implements `count_of`, `starts_with`,
  `without_prefix`, `ends_with`, and `without_suffix` as ordinary source
  helpers over the existing `std.vec.i64` runtime wrappers and staged helper
  surface.
- `lib/std/vec_f64.slo` exports and implements `count_of` as an ordinary
  source helper; the existing f64 prefix/suffix helpers remain aligned.
- Local fixture copies, explicit `std.vec_i64` and `std.vec_f64` examples, and
  mirrored language-doc examples import and exercise the new helpers.
- Focused helper tests, source-search tests, and promotion-gate inventories now
  require the new exports and expected `20 test(s) passed` fixture output.
- README, roadmaps, release notes, SPEC-v1, regenerated `STDLIB_API.md`, the
  beta12 `.llm` scope note, and the compiler package version bump align on the
  `1.0.0-beta.12` concrete vector query and prefix parity scope.

## Findings

No blockers.

- Helper semantics match the existing concrete lanes: exact equality counts,
  empty prefix/suffix success, longer input rejection, mismatch rejection, exact
  removal to empty, and unmatched removal returning the original vector.
- Release-facing text keeps the scope narrow: no source-language, runtime,
  typed-core, compiler-known stdlib/runtime-name, generic dispatch, map/set,
  iterator, mutable-vector, slice/view, ABI/layout, performance, or stable
  stdlib/API-freeze claim.
- `STDLIB_API.md` is consistent with the current `lib/std` sources: 578
  exported helper signatures total, with 36 each for `std.vec_i64` and
  `std.vec_f64`.
- Publication hygiene review found no beta12 private local path leakage in the
  touched release-facing text.

## Verification

- `cargo test --manifest-path compiler/Cargo.toml --test standard_vec_i64_source_helpers_alpha --test standard_vec_f64_source_helpers_alpha --test standard_vec_i64_source_search_alpha --test standard_vec_f64_source_search_alpha`: passed.
- `cargo fmt --manifest-path compiler/Cargo.toml --check`: passed.
- `git diff --check`: passed.
- `STDLIB_API.md` was regenerated in an isolated copy and compared against the
  worktree copy: no diff.

- `./scripts/release-gate.sh`: passed after the beta12 release commit, including
  docs/API freshness, `cargo fmt --check`, full `cargo test`, ignored promotion
  gates, binary smoke, and LLVM smoke.