Scope provenance dirtiness to build context

Author: max-parke-scale

src/agentex/lib/utils/build_provenance.py

@@ -171,8 +171,10 @@ def capture_build_provenance(
     except ValueError:
         subpath = None
 
-    # `git status --porcelain` is empty (→ _git returns None) for a clean tree.
-    dirty = _git(repo_root_path, "status", "--porcelain") is not None
+    status_args = ("status", "--porcelain")
+    if subpath is not None:
+        status_args += ("--", subpath)
+    dirty = _git(repo_root_path, *status_args) is not None
 
     return BuildProvenance(
         repo=remote,

tests/lib/test_build_provenance.py

@@ -243,3 +243,15 @@ def test_capture_monorepo_subpath(tmp_path: Path) -> None:
     prov = capture_build_provenance(repo, repo / "agents" / "foo")
 
     assert prov.subpath == "agents/foo"
+
+
+def test_capture_monorepo_ignores_changes_outside_context(tmp_path: Path) -> None:
+    repo = _init_repo(tmp_path / "repo")
+    _write(repo, "agents/foo/main.py", "print(1)")
+    _write(repo, "agents/bar/main.py", "print(2)")
+    _commit_all(repo)
+    _write(repo, "agents/bar/scratch.py", "debug = True")
+
+    prov = capture_build_provenance(repo, repo / "agents" / "foo")
+
+    assert prov.dirty is False