added mcp_renderer

tests/renderers/mcp/test_mcp_idempotency.py

@@ -0,0 +1,20 @@
+from pathlib import Path
+
+from docforge import MCPRenderer
+from docforge.models import Project, Module
+
+
+def test_mcp_idempotent(tmp_path: Path):
+    project = Project("testpkg")
+    project.add_module(Module("testpkg.mod"))
+
+    out_dir = tmp_path / "mcp"
+    renderer = MCPRenderer()
+
+    renderer.generate_sources(project, out_dir)
+    first = (out_dir / "testpkg" / "mod.md").read_text()
+
+    renderer.generate_sources(project, out_dir)
+    second = (out_dir / "testpkg" / "mod.md").read_text()
+
+    assert first == second