Add a pre-stop hook that captures agent state before container exit and
writes a scrubbed snapshot to /configs/.agent_snapshot.json. On restart,
the snapshot is loaded and the adapter's restore_state() is called before
the A2A server starts.
- New lib/pre_stop.py: build_snapshot / write_snapshot / read_snapshot /
delete_snapshot + _scrub_value deep-scrubber (uses lib.snapshot_scrub
to redact API keys, tokens, and sandbox output before persisting)
- BaseAdapter.pre_stop_state(): captures _executor._session_id and recent
transcript_lines; overridden by adapters with richer in-memory state
- BaseAdapter.restore_state(): stores snapshot fields as adapter attrs
for create_executor() to pick up
- main.py: calls pre_stop serialization in finally block (after server
serves) and restore_state() after adapter setup, before server starts
- Added 12 unit tests covering scrub, read/write, adapter integration
Co-authored-by: Molecule AI Infra-Runtime-BE <infra-runtime-be@agents.moleculesai.app>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
