test: pin generated-directory exclusion in inventory discovery

tests/unit/test_inventory.py

@@ -1 +1,38 @@
-def test_dummy(): pass
+"""Inventory discovery must never traverse generated directories."""
+
+from pathlib import Path
+
+from skillfoundry.analysis.inventory import discover_files
+from skillfoundry.config.settings import AnalysisSettings
+
+
+def test_discovery_skips_generated_directories(tmp_path: Path):
+    settings = AnalysisSettings()
+    (tmp_path / "src").mkdir()
+    (tmp_path / "src" / "main.py").write_text("print('x')\n")
+    (tmp_path / "README.md").write_text("readme\n")
+
+    for generated in (".git", "node_modules", ".venv", "__pycache__", "dist", "build"):
+        d = tmp_path / generated
+        d.mkdir()
+        (d / "junk.js").write_text("generated\n")
+
+    found = discover_files(tmp_path, settings)
+    paths = [f.path for f in found]
+
+    assert (tmp_path / "src" / "main.py") in [tmp_path / p for p in paths]
+    assert (tmp_path / "README.md") in [tmp_path / p for p in paths]
+    assert all("node_modules" not in str(p) for p in paths)
+    assert all(".git" not in str(p) for p in paths)
+    assert all(".venv" not in str(p) for p in paths)
+    assert all("__pycache__" not in str(p) for p in paths)
+    assert all("dist" not in str(p) for p in paths)
+    assert all("build" not in str(p) for p in paths)
+
+
+def test_discovery_still_finds_normal_sources(tmp_path: Path):
+    settings = AnalysisSettings()
+    (tmp_path / "lib").mkdir()
+    (tmp_path / "lib" / "core.py").write_text("x = 1\n")
+    found = discover_files(tmp_path, settings)
+    assert any("lib/core.py" in str(f.path) for f in found)