# Comprehensive Repository Review (2026-02-26)

## Scope

This review covers architecture, correctness, developer experience, testing, and release readiness for the current `nuv` repository state.

## Executive summary

`nuv` is a small, focused scaffolding CLI with a clean codebase and strong baseline quality gates (pytest + 100% coverage, ruff, ty). The implementation is easy to follow, templates are intentionally minimal, and behavior is well-tested.

Key strengths:

- Concise CLI and command boundary.
- Strong test discipline and full branch coverage.
- Useful install-mode flexibility (`editable` / `none` / `command-only`).
- Clear, user-facing README with practical examples.

Primary recommendations:

1. Add rollback behavior (or explicit guidance) when `uv sync`/`uv tool install` fails after files are generated.
2. Add structured exception logging for unexpected failures at the top-level CLI boundary.
3. Consider broadening compatibility beyond Python 3.14 unless this is a strict product constraint.

## Architecture and code organization

The repository uses a straightforward layout:

- CLI argument handling in `src/nuv/cli.py`.
- Core scaffolding behavior in `src/nuv/commands/new.py`.
- File templates in `src/nuv/templates/script/*.tpl`.
- End-to-end behavior tests centralized in `tests/test_new.py`.

This separation is appropriate for the current scope and keeps implementation complexity low.

## Correctness review

### What is solid

- Input validation for name, install mode, and python version is explicit and tested.
- Template rendering verifies existence before reading.
- `uv` presence is checked before invoking `uv sync` and editable tool install.
- Non-zero subprocess exits are converted into controlled `RuntimeError`s.

### Risks / gaps

1. **No rollback on partial failure**
   - Current flow creates the target directory and writes files before running `uv sync` and installation. If one of those later steps fails, users are left with a partially-created project directory.
   - This is not incorrect, but can feel broken in CI/bootstrap scenarios.

2. **Unhandled unexpected exceptions at CLI boundary**
   - `run_new` catches `ValueError`, `RuntimeError`, and `FileNotFoundError`. Any other exception type will escape and produce a stack trace.
   - For a scaffolding CLI, catching broad exceptions in the top-level dispatch path and emitting a concise error can improve UX.

3. **Very narrow runtime requirement**
   - Project metadata requires Python `>=3.14`.
   - If intentional, this is fine; if not, it may unnecessarily limit adoption because many users still run 3.11–3.13.

## Testing and quality gates

Current quality posture is strong:

- 48 tests passing.
- 100% coverage with branch coverage enabled.
- Ruff lint clean.
- Ty type checks clean.

This is excellent for a scaffold generator of this size.

## Template quality review

The generated template includes:

- argparse main entry point.
- logging configuration module.
- pyproject configured with pytest/ruff/ty.
- passing starter test.

Overall template quality is good and intentionally minimal. The generated README and commands are coherent.

## Documentation review

README provides:

- install/run paths (`uv tool install` and `uvx --from`).
- command usage variants.
- expected generated project shape.
- quality-tool expectations.

This is enough for early users and contributors.

## Priority action plan

### P1 (high impact)

- Add optional cleanup behavior for failed post-scaffold steps (e.g., remove target dir on failure unless `--keep-on-failure` is passed).

### P2 (medium impact)

- Add top-level `except Exception` at CLI boundary with readable error output and optional debug mode for traceback.

### P3 (context dependent)

- Revisit `requires-python` floor if market reach matters more than latest-language-only constraints.

## Final assessment

The repository is in strong shape for an early-stage CLI utility. No critical correctness or security defects were found in the current scope. Most improvements are around resilience and user experience under failure conditions.
