Local run viewer: email reports, run history, and the platform suite (#813)

strix/core/paths.py

@@ -21,3 +21,20 @@ def runtime_state_dir(run_dir: Path) -> Path:
 
 def run_record_path(run_dir: Path) -> Path:
     return run_dir / RUN_RECORD_FILENAME
+
+
+def runs_base_dir(*, cwd: Path | None = None) -> Path:
+    base = cwd or Path.cwd()
+    return base / RUNS_DIR_NAME
+
+
+def latest_run_dir(*, cwd: Path | None = None) -> Path | None:
+    base = runs_base_dir(cwd=cwd)
+    if not base.is_dir():
+        return None
+    candidates = [child for child in base.iterdir() if run_record_path(child).is_file()]
+    if not candidates:
+        return None
+    # run.json is rewritten on status/end changes, so its mtime tracks activity
+    # more reliably than the directory mtime (a live run sorts to the top).
+    return max(candidates, key=lambda child: run_record_path(child).stat().st_mtime)