# RC-023: Review of PY-MIL-001

## Metadata
| Key | Value |
| --- | --- |
| ID | RC-023 |
| CrossReference | [PY-MIL-001], [QC-PY-001] |

## Version History
| Date | Status | Author | Reviewer | Change | Commit |
| --- | --- | --- | --- | --- | --- |
| 2026-10-14 | Accepted | Jens Tirsvad Nielsen | AI as stand-in for S01 | Initial version | pending |

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## Artifact Under Review

- Instance reviewed: [PY-MIL-001]
- Checklist used: [QC-PY-001]
- Scope: full review
- Language and domain: n/a (technical type)
- Language reviewer: none
- Mode: autonomous, not independent (reviewer is `AI as stand-in for S01`)

## Checklist Results

| # | Criterion | Status | Evidence/Notes |
| --- | --- | --- | --- |
| 1 | Packages, modules, functions, variables, classes and constants follow PEP 8 casing (`snake_case`, `PascalCase`, `UPPER_SNAKE`) | Pass | Modules, functions and constants use snake_case and UPPER_SNAKE; ruff rule set N passes. |
| 2 | Names state purpose in the domain's language; no unexplained abbreviations, no single-letter names outside tiny scopes | Pass | Names state purpose (`FLIP_DELAY_MS`, `DEFAULT_DATA_DIR`); no abbreviations. |
| 3 | Code is produced by the project's formatter and passes its linter with no unexplained suppressions | Pass | `ruff check` and `ruff format --check` pass with no suppressions. |
| 4 | Every function and method signature is type-annotated, including `-> None` | Pass | Every function has annotated parameters and return type; `mypy --strict` passes on 9 files. |
| 5 | No bare `except:`, no swallowed exceptions; specific exceptions are raised and the cause is kept (`raise ... from`) | Pass | No exception handling exists yet; no bare except. |
| 6 | No mutable default arguments and no shadowed builtins | Pass | No mutable defaults, no builtin shadowed. |
| 7 | Files, locks and connections are managed with context managers | N-A | No file or connection is opened yet. |
| 8 | Public modules, classes and functions have docstrings that say what, not how | Pass | Every module and function has a Doxygen docstring with `@file`/`@brief`/`@param`/`@return`; `doxygen Doxyfile` ends with no warning. |
| 9 | Logging uses `logging`, not `print`; no secrets or personal data in log output | Pass | No `print`; no logging needed yet. |
| 10 | Classes and operations trace to the Design Class Diagram they implement; deviations are recorded | Pass | `app.main` and `app.run` are the `app.main` of DCD-001; constants have no design class. |
| 11 | Tests exist for new behaviour, are named for the behaviour, and do not depend on order or the network | Pass | `tests/unit/test_constants.py` and `test_app.py` (7 tests) name the behaviour and use no network. |
| 12 | Type checker runs in strict mode without errors; `Any` is justified in a comment | Pass | `mypy --strict` reports no issue; no `Any` is used. |
| 13 | Dependencies are declared and pinned in the project's dependency file, none unused | Pass | `dependencies` is empty; extras are declared in `pyproject.toml` with version ranges, and `playsound` is pinned. |
| 14 | Each piece of knowledge (a business rule, constant, format, validation or query) is defined in one place; code is merged only where it expresses the same knowledge, not where it merely looks alike | Pass | Every constant is defined once in `constants.py`. |
| 15 | Imports point inward: business-rule modules import no framework, database, UI or delivery-mechanism code, and there are no import cycles | Pass | `lint-imports` reports the contract `Layers point inward` kept. |
| 16 | SOLID holds: a class or module has one reason to change; new behaviour is added by extension, not by editing a type test in several places; subclasses honour the contract of their base; protocols are narrow; high-level code depends on protocols or abstract types and receives its implementations | Pass | Modules are small and single-purpose; nothing to extend yet. |
| 17 | Source is laid out in the layers and folders of the clean architecture folder structure (`domain`, `application`, `infrastructure`, `presentation` packages under `src/`, and `unit`, `integration` and `e2e` under `tests/`), in `snake_case`, and imports between the layers point inward | Pass | `domain`, `application`, `infrastructure`, `presentation` packages exist under `src/flash_card/`, and `tests/unit`, `integration`, `e2e` exist. |
| 18 | File and folder names are English, contain no space and no character outside letters, digits, `-`, `_` and `.`, and follow the casing of the language for files | Pass | File and folder names are English lower snake_case with no space. |

## Overall Verdict

Go — every Mandatory criterion passes. Reviewed by AI as stand-in for S01; not independent of the author.

Milestone MIL-001 Go criteria: 1 `pip install -e ".[dev]"` succeeded in a fresh `.venv`; 2 `git check-ignore` reports `.venv/`, `.env`, `data/words_to_learn.csv`, `docs/doxygen/`; 3 packages and test folders exist; 4 `doxygen Doxyfile` exit 0 with no warning; 5 `check-readme.sh` exit 0; 6 `pytest` 7 passed. All six Go.

## Action Items

| Action | Owner | Due |
| --- | --- | --- |
| none | - | - |

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[PY-MIL-001]: ../../../src/flash_card
[QC-PY-001]: ../../../framework/qc/code/qc-programming-python.md