docs: clean up stale create_session usage instructions in comments and markdown examples

.agents/skills/multi-agent-mux-create/SKILL.md

@@ -74,12 +74,12 @@ To prevent this, you can run this skill inside an **isolated tmux server** using
    ```
 2. **Via Option Flag**:
    ```bash
-   bash scripts/create_session.sh --workspace /path/to/project --agent claude --tmux-server multi-agent-canary
+   bash scripts/create_session.sh --workspace /path/to/project --agent claude --role developer --tmux-server multi-agent-canary
    ```
 3. **Submit Job Integration**:
    You can automatically register a delegated job with a prompt when creating a session:
    ```bash
-   bash scripts/create_session.sh --workspace /path/to/project --agent claude --submit-job "Task prompt here"
+   bash scripts/create_session.sh --workspace /path/to/project --agent claude --role developer --submit-job "Task prompt here"
    ```
 
 ### Recommended Alias