Add quack easter egg and development docs

Add a hidden 'quack' command that displays DuckTales ASCII art of
Launchpad McQuack. Also document the development workflow in README,
including how to run tests with uv and the optional venv setup.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -79,6 +79,38 @@ The generated plist configures the script to:
 - Keep alive (restart if it exits)
 - Log stdout/stderr to `~/Library/Logs/mcquack.<scriptname>.{out,err}.log`
 
+## Development
+
+mcquack uses [uv](https://github.com/astral-sh/uv) for dependency management. Thanks to the
+uv shebang at the top of `mcquack.py`, you can always run the script directly without any
+setup:
+
+```bash
+./mcquack.py list
+```
+
+This works for users and developers alike—no virtual environment activation or `python`
+command needed. uv handles everything automatically.
+
+### Running Tests
+
+```bash
+uv run pytest
+```
+
+### Virtual Environment (Optional)
+
+If you prefer working in a virtual environment (e.g., for IDE support or running
+`python mcquack.py` directly), you can create and activate one:
+
+```bash
+uv venv
+source .venv/bin/activate
+```
+
+After activation, `python mcquack.py` will work as expected. But again, `./mcquack.py`
+always works without this step.
+
 ## License
 
 MIT

mcquack.py

@@ -272,5 +272,48 @@ def delete(
     typer.echo(f"Deleted: {plist_path}")
 
 
+@app.command(hidden=True)
+def quack() -> None:
+    """Quack!"""
+    art = r"""
+ ___          _   _____     _
+|   \ _  _ __| |_|_   _|_ _| |___ ___
+| |) | || / _| / / | |/ _` | / -_|_-<
+|___/ \_,_\__|_\_\ |_|\__,_|_\___/__/
+
+               '' .``,l"
+              "[}ll1)f/1I
+             !__YpQm+:]",
+      ~>. ,i,i<nxnav(,:"          .
+   ;/Zj,  ::'::[trcx(i<-"    `i``umv~'
+  [do|      .":]z]<<[;       :fzLwddmw_
+  cWr         xxdvzr\fr\_:-~'  "QOL0b\;
+  X*>    `!>~1cXUXvcLbccL_{1! .  +YM)
+  :U1.   <fUmpZUxXmphkqwv-]?+  .i~-}>.
+    ";|XmkodUf{?_?{xCCZw\[{[~>">{}{]{i
+      `>]11[][[)UmYrz+fx1}{{}<_]{{{{{?.
+      "I<___]+^Qo**h)}}]}{{}1+}1{}{{{<
+    `+}{{{{}]<|8Mkou?{{{{{}1?,~][[[?l
+    ;{{}}}[[]?v0r?|{{{{{{{1?`   `^`
+     ![}{{}[]i    .?{{[]}}~'
+      .,;;,`       i]_fC|>
+                 "{vxfXQcv{,
+              .>/zJJJCUXXXJz]
+            '?vYCCUXcvvvcXJJU>
+            !XJJYv\?>l::,I[Yu'
+             )C/l.         <n,.
+            `/\.           ;{+
+            <{~           ![}[i:"^`^`
+        '"I+}}[I         .-{}}}}[[[}-`
+    ;--][[}{}}}l          'i][}}}[]]+^
+    ;[[[}}}}[_,             .";II" .
+    .```:!!;^
+
+    "If we're not back by dawn... call the press!"
+                            - Launchpad McQuack
+"""
+    typer.echo(art)
+
+
 if __name__ == "__main__":
     app()