README.md

@@ -37,6 +37,14 @@ Each lecture has its own screenshot in `docs/images/` (made by `docs/images/capt
 
 ![Lecture 2: Hello, World! in the browser](docs/images/lecture-02.png)
 
+**Lecture 3: the command line.** `pwd`, `ls`, `cd`, `mkdir`, `touch` and `rm` (with `rm -rf` as the command to double-check). `flask_day_54.domain.cli_basics` lists them with their Windows equivalents: `python -m flask_day_54.domain.cli_basics`. The screenshot shows the real commands run in a temporary folder.
+
+![Lecture 3: the command line](docs/images/lecture-03.png)
+
+**Lecture 4: `__name__` and `__main__`.** A file run directly has `__name__ == "__main__"`; an imported file has its module name. `app.run()` sits under that check in `hello.py`, so there are two ways to start the server: `flask --app flask_day_54.presentation.hello run` or `python -m flask_day_54.presentation.hello`. Try `python -m flask_day_54.domain.name_demo`.
+
+![Lecture 4: __name__ and __main__](docs/images/lecture-04.png)
+
 ## 📋 Requirements
 
 - Python 3.13 or newer, because the project sets `requires-python = ">=3.13"` in `pyproject.toml`.

docs/artifact-registry.md

@@ -18,7 +18,7 @@ document of a type. `Primary File` may contain a glob (e.g.
 | ADR | Architecture Decision Record | docs/adr/adr-NNNN-*.md | 0002 |
 | DICT | Domain Dictionary | docs/dictionary.md | 002 |
 | TM | Traceability Matrix | docs/sqa/traceability-matrix.md | 002 |
-| RC | SQA Review Record | docs/sqa/reviews/rc-*.md | 017 |
+| RC | SQA Review Record | docs/sqa/reviews/rc-*.md | 018 |
 
 ## Languages
 

docs/images/capture.py

@@ -11,6 +11,7 @@ Usage (from the repository root, with the project's .venv active):
 
 import html
 import os
+import re
 import shutil
 import subprocess
 import sys
@@ -101,6 +102,15 @@ def terminal_page(title: str, entries: list[tuple[str, str]], png: Path, height:
     shot(src, png, 900, height)
 
 
+def stop(proc: subprocess.Popen) -> None:
+    """Stop a server and its reloader child."""
+    if os.name == "nt":
+        subprocess.run(["taskkill", "/F", "/T", "/PID", str(proc.pid)], capture_output=True)  # nosemgrep
+    else:
+        proc.kill()
+    proc.wait(timeout=10)
+
+
 def python() -> str:
     return sys.executable
 
@@ -141,7 +151,7 @@ def step2() -> None:
         src.write_text(page, encoding="utf-8")
         shot(src, OUT / "lecture-02.png", 700, 230)
     finally:
-        proc.kill()
+        stop(proc)
 
 
 def step3() -> None:
@@ -153,11 +163,11 @@ def step3() -> None:
         "ls",
         "mkdir my_project",
         "cd my_project && touch hello.py && ls",
-        "cd .. && rm -rf my_project && ls",
+        "rm -rf my_project && ls",
     ]
     for command in script:
         output = run([bash, "-c", command], work)
-        entries.append((command, output.replace(str(work).replace("\\", "/"), "~/demo")))
+        entries.append((command, re.sub(r"/tmp/cli-demo-\w+", "~/demo", output)))
     shutil.rmtree(work, ignore_errors=True)
     terminal_page("Terminal - lecture 3: the command line", entries, OUT / "lecture-03.png", 330)
 
@@ -188,8 +198,13 @@ def step4() -> None:
         text=True,
     )
     time.sleep(3)  # nosemgrep
-    server.kill()
+    stop(server)
-    out = (server.stdout.read() if server.stdout else "").strip()
+    raw = (server.stdout.read() if server.stdout else "").strip()
+    # Leave out the .env tip and the random debugger PIN; they say nothing about the lecture.
+    kept = [
+        line for line in raw.splitlines() if "Tip:" not in line and "Debugger PIN" not in line
+    ]
+    out = "\n".join(kept)
     entries.append(("python -m flask_day_54.presentation.hello", out + "\n^C"))
     terminal_page("Terminal - lecture 4: __name__ and __main__", entries, OUT / "lecture-04.png", 560)
 

docs/images/sources/lecture-03.html

@@ -0,0 +1,12 @@
+<!doctype html><meta charset='utf-8'><style>
+body{margin:0;background:#1e1e1e;font-family:Consolas,'DejaVu Sans Mono',monospace;color:#d4d4d4}
+.bar{background:#333;color:#ccc;padding:8px 14px;font-size:14px}
+pre{margin:0;padding:16px 18px;font-size:15px;line-height:1.45;white-space:pre-wrap}
+.p{color:#6a9955}.c{color:#9cdcfe}
+</style><div class='bar'>Terminal - lecture 3: the command line</div><pre><span class="p">$</span> <span class="c">pwd</span>
+~/demo
+<span class="p">$</span> <span class="c">ls</span>
+<span class="p">$</span> <span class="c">mkdir my_project</span>
+<span class="p">$</span> <span class="c">cd my_project &amp;&amp; touch hello.py &amp;&amp; ls</span>
+hello.py
+<span class="p">$</span> <span class="c">rm -rf my_project &amp;&amp; ls</span></pre>

docs/images/sources/lecture-04.html

@@ -0,0 +1,18 @@
+<!doctype html><meta charset='utf-8'><style>
+body{margin:0;background:#1e1e1e;font-family:Consolas,'DejaVu Sans Mono',monospace;color:#d4d4d4}
+.bar{background:#333;color:#ccc;padding:8px 14px;font-size:14px}
+pre{margin:0;padding:16px 18px;font-size:15px;line-height:1.45;white-space:pre-wrap}
+.p{color:#6a9955}.c{color:#9cdcfe}
+</style><div class='bar'>Terminal - lecture 4: __name__ and __main__</div><pre><span class="p">$</span> <span class="c">python -m flask_day_54.domain.name_demo</span>
+Running as the main program: the file was executed directly
+<span class="p">$</span> <span class="c">python -c &quot;import flask_day_54.domain.name_demo as m; print(m.describe_name(m.__name__))&quot;</span>
+Running as an imported module named flask_day_54.domain.name_demo
+<span class="p">$</span> <span class="c">python -m flask_day_54.presentation.hello</span>
+ * Serving Flask app &#x27;hello&#x27;
+ * Debug mode: on
+WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
+ * Running on http://127.0.0.1:5000
+Press CTRL+C to quit
+ * Restarting with stat
+ * Debugger is active!
+^C</pre>

docs/sqa/reviews/rc-017-code-mil-003-cli-and-main.md

@@ -0,0 +1,61 @@
+# Review of MIL-003
+
+## Metadata
+| Key | Value |
+| --- | --- |
+| ID | RC-017 |
+| CrossReference | [MIL-003], [QC-PY-001] |
+
+## Version History
+| Date | Status | Author | Reviewer | Change | Commit |
+| --- | --- | --- | --- | --- | --- |
+| 2026-11-06 | Proposed | Jens Tirsvad Nielsen | AI as stand-in for S01 | Initial version | pending |
+
+---
+
+## Artifact Under Review
+
+- Instance reviewed: [MIL-003]
+- Checklist used: [QC-PY-001]
+- Scope: full review of the source and tests delivered by MIL-003 (src/, tests/)
+- Language and domain: n/a
+- Language reviewer: none (the reviewer reads English and knows the IT domain)
+- Mode: autonomous, not independent (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 / UPPER_SNAKE; classes none or PascalCase. |
+| 2 | Names state purpose in the domain's language; no unexplained abbreviations, no single-letter names outside tiny scopes | Pass | Names follow the lecture and the domain dictionary. |
+| 3 | Code is produced by the project's formatter and passes its linter with no unexplained suppressions | Pass | `ruff format` leaves files unchanged and `ruff check` (E, F, I, B, UP) passes; configured in pyproject.toml. |
+| 4 | Every function and method signature is type-annotated, including `-> None` | Pass | Every function signature is annotated, including `-> None`. |
+| 5 | No bare `except:`, no swallowed exceptions; specific exceptions are raised and the cause is kept (`raise ... from`) | Pass | No bare except and no swallowed exception. |
+| 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, lock or connection is opened. |
+| 8 | Public modules, classes and functions have docstrings that say what, not how | Pass | Module and public names carry docstrings plus Doxygen comments. |
+| 9 | Logging uses `logging`, not `print`; no secrets or personal data in log output | N-A | Console output of the demo entry points (print under the __main__ guard) is the program's result, not diagnostic logging; no secrets handled. |
+| 10 | Classes and operations trace to the Design Class Diagram they implement; deviations are recorded | N-A | No DCD exists in this project; the layered layout is recorded in ADR-0001. |
+| 11 | Tests exist for new behaviour, are named for the behaviour, and do not depend on order or the network | Pass | pytest tests named for behaviour; no order or network dependence. |
+| 12 | Type checker runs in strict mode without errors; `Any` is justified in a comment | N-A | No type checker is configured (optional criterion). |
+| 13 | Dependencies are declared and pinned in the project's dependency file, none unused | Pass | Dependencies are declared in pyproject.toml; none unused (Flask is the optional `web` extra). |
+| 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 | Each constant is defined once in the constants.py of its layer. |
+| 15 | Imports point inward: business-rule modules import no framework, database, UI or delivery-mechanism code, and there are no import cycles | Pass | `domain` imports no framework or outer layer; imports point inward; no cycles. |
+| 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 | Small modules with one reason to change; no type tests or subclass hierarchies. |
+| 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 | Layers domain, application, infrastructure, presentation under src/flask_day_54; tests in unit and e2e (ADR-0001); no layer merged. |
+| 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 | English snake_case file names without spaces. |
+
+## Overall Verdict
+
+Go — All applicable mandatory criteria pass.
+
+## Action Items
+
+| Action | Owner | Due |
+| --- | --- | --- |
+| None | S01 | - |
+
+---
+
+[MIL-003]: ../../milestones/mil-003-cli-and-main.md
+[QC-PY-001]: ../../../framework/qc/code/qc-programming-python.md