feat(#830): revoke leases across compaction lifecycle

packages/mosaic/framework/tools/lease-broker/launch-runtime.py

@@ -12,6 +12,8 @@ from collections.abc import Callable, Mapping, Sequence
 from pathlib import Path
 from typing import Final
 
+from lease_generation import initialize_runtime_generation
+
 MAX_FRAME: Final = 64 * 1024
 BROKER_TIMEOUT_SECONDS: Final = 1.5
 CLAUDE_DANGEROUS_FLAG: Final = "--dangerously-skip-permissions"
@@ -44,6 +46,7 @@ def main(
     environ: Mapping[str, str] | None = None,
     request: Callable[[Path, dict[str, object]], dict[str, object]] = broker_request,
     execute: Callable[[str, list[str], dict[str, str]], object] = os.execvpe,
+    initialize_generation: Callable[[Path, int], None] = initialize_runtime_generation,
 ) -> int:
     parser = argparse.ArgumentParser()
     parser.add_argument("--runtime", required=True, choices=("claude", "pi"))
@@ -83,6 +86,8 @@ def main(
             or any(character not in "0123456789abcdef" for character in session_id)
         ):
             raise ValueError("registration refused")
+        generation_file = socket_path.parent / f"generation-{session_id}.state"
+        initialize_generation(generation_file, generation)
     except (KeyError, ValueError, OSError, json.JSONDecodeError):
         print("Mosaic lease broker registration failed; runtime launch denied.", file=sys.stderr)
         return 1
@@ -90,6 +95,7 @@ def main(
     environment = dict(source_environment)
     environment["MOSAIC_LEASE_SESSION_ID"] = session_id
     environment["MOSAIC_RUNTIME_GENERATION"] = str(generation)
+    environment["MOSAIC_LEASE_GENERATION_FILE"] = str(generation_file)
     environment["MOSAIC_LEASE_RUNTIME"] = arguments.runtime
     try:
         execute(command[0], command, environment)