Implement DMN mode support in crew creation and execution (#6194)

* Implement DMN mode support in crew creation and execution

- Added `is_dmn_mode_enabled` utility to check for enterprise non-interactive mode based on the `CREWAI_DMN` environment variable.
- Updated `create` function in `cli.py` to enforce required parameters when DMN mode is active, raising appropriate usage errors.
- Enhanced `create_crew` and `create_json_crew` functions to skip provider prompts and handle folder existence checks in DMN mode.
- Introduced non-interactive defaults for agent and task creation in DMN mode, ensuring seamless project setup without user input.
- Modified `run_crew` to bypass TUI and handle runtime inputs directly when in DMN mode, improving execution flow for JSON-defined crews.
- Added tests to validate DMN mode behavior, ensuring correct handling of required inputs and non-interactive defaults.

* Implement DMN mode support in crew creation and execution

- Introduced `is_dmn_mode_enabled()` utility to check for non-interactive mode based on the `CREWAI_DMN` environment variable.
- Updated `create` function to enforce required parameters when DMN mode is active, raising appropriate usage errors.
- Modified `create_crew` and `create_json_crew` functions to skip provider prompts and utilize non-interactive defaults in DMN mode.
- Enhanced `run_crew` to bypass TUI and handle runtime inputs directly in DMN mode, ensuring smooth execution without user interaction.
- Added tests to validate DMN mode behavior, including requirements for type and name, and ensuring proper handling of existing folders and missing inputs.

lib/cli/tests/test_create_crew.py

@@ -812,3 +812,34 @@ def test_json_wizard_task_reprompts_on_cancelled_agent_pick(monkeypatch):
 
     assert len(pick_calls) == 2
     assert task["agent"] == "second_agent"
+
+
+def test_json_create_dmn_mode_uses_non_interactive_defaults(tmp_path, monkeypatch):
+    monkeypatch.chdir(tmp_path)
+    monkeypatch.setenv("CREWAI_DMN", "True")
+    monkeypatch.setattr(
+        json_crew,
+        "_wizard_agents_and_tasks",
+        lambda **_: pytest.fail("DMN mode must not run the wizard"),
+    )
+    monkeypatch.setattr(
+        json_crew,
+        "_setup_env",
+        lambda *_args, **_kwargs: pytest.fail("DMN mode must not prompt for env vars"),
+    )
+
+    json_crew.create_json_crew("DMN Crew", provider="anthropic", skip_provider=False)
+
+    project_root = tmp_path / "dmn_crew"
+    assert (project_root / "crew.jsonc").exists()
+    assert (project_root / "agents" / "researcher.jsonc").exists()
+    assert not (project_root / ".env").exists()
+
+    crew_template = (project_root / "crew.jsonc").read_text()
+    agent_template = (project_root / "agents" / "researcher.jsonc").read_text()
+
+    assert '"memory": false' in crew_template
+    assert '"description": "Research current AI trends and write a concise summary."' in (
+        crew_template
+    )
+    assert '"llm": "anthropic/claude-opus-4-6"' in agent_template