fix: auto compaction threshold default 200k tokens

src/prefetch.py

@@ -0,0 +1,23 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+from pathlib import Path
+
+
+@dataclass(frozen=True)
+class PrefetchResult:
+    name: str
+    started: bool
+    detail: str
+
+
+def start_mdm_raw_read() -> PrefetchResult:
+    return PrefetchResult('mdm_raw_read', True, 'Simulated MDM raw-read prefetch for workspace bootstrap')
+
+
+def start_keychain_prefetch() -> PrefetchResult:
+    return PrefetchResult('keychain_prefetch', True, 'Simulated keychain prefetch for trusted startup path')
+
+
+def start_project_scan(root: Path) -> PrefetchResult:
+    return PrefetchResult('project_scan', True, f'Scanned project root {root}')