Use python3 as the canonical command name course-wide (#104) (#105)

modules/26-orchestrating-multiple-agents/README.md

@@ -401,7 +401,7 @@ thing you're waiting on.
 
    ```bash
    cd ~/ai-workflow-course/tasks-app
-   python cli.py list && python cli.py count && python cli.py clear   # all three features live
+   python3 cli.py list && python3 cli.py count && python3 cli.py clear   # all three features live
    ```
 
    If any of those three commands fails, the resolution was wrong. That's why you verify the result

modules/26-orchestrating-multiple-agents/lab/agent-prompts/agent-42-count.md

@@ -15,7 +15,7 @@ You are working in this worktree only. Do not touch any other folder.
 
 **Acceptance criteria:**
 
-- `python cli.py count` prints the number of pending tasks and exits 0.
+- `python3 cli.py count` prints the number of pending tasks and exits 0.
 - No other files change. (`README.md`, `CHANGELOG.md`, and `tasks.py` are owned by other agents;
   stay out of them.)
 

modules/26-orchestrating-multiple-agents/lab/agent-prompts/agent-44-clear.md

@@ -17,8 +17,8 @@ You are working in this worktree only. Do not touch any other folder.
 
 **Acceptance criteria:**
 
-- `python cli.py clear` removes all tasks and prints `cleared`.
-- `python cli.py list` afterward shows `(no tasks yet)`.
+- `python3 cli.py clear` removes all tasks and prints `cleared`.
+- `python3 cli.py list` afterward shows `(no tasks yet)`.
 
 When done, commit your work on this branch with a message referencing #44, then push the branch. Stop
 there; the human opens and reviews the PR, and should expect a conflict against `feature/42-count` at

modules/26-orchestrating-multiple-agents/lab/start/README.md

@@ -15,11 +15,11 @@ This is the running example for **Module 1** (where you feel the copy-paste prob
 ## Run it
 
 ```bash
-python cli.py add "read module 1"
-python cli.py add "set up my editor"
-python cli.py list
-python cli.py done 0
-python cli.py list
+python3 cli.py add "read module 1"
+python3 cli.py add "set up my editor"
+python3 cli.py list
+python3 cli.py done 0
+python3 cli.py list
 ```
 
 Requires Python 3.10+ (it uses `list[Task]` style type hints). No third-party packages.

modules/26-orchestrating-multiple-agents/lab/start/cli.py

@@ -1,8 +1,8 @@
 """Tiny command-line front end for the demo task app.
 
 Run it:
-    python cli.py add "write the lesson"
-    python cli.py list
+    python3 cli.py add "write the lesson"
+    python3 cli.py list
 
 State is kept in tasks.json next to this file. It's intentionally minimal; the point of this app
 is to be a realistic-but-small thing you change with an AI, not a product.
@@ -31,7 +31,7 @@ def save(tlist: TaskList) -> None:
 def main(argv: list[str]) -> int:
     tlist = load()
     if not argv:
-        print("usage: python cli.py [add <title> | list | done <index> | count | delete <index>]")
+        print("usage: python3 cli.py [add <title> | list | done <index> | count | delete <index>]")
         return 1
 
     command = argv[0]