Module budgets 

Teardown budgets shared by every session host (values copied from agent-tui/src/tui/signals.rs; signals.rs re-exports these on day 2).

• SAVE_TIMEOUT_SECS — session save + index end record (data safety first)
• HOOKS_TIMEOUT_SECS — on_session_end hook emit (concurrent, fail-open)
• TEARDOWN_TIMEOUT_SECS = their sum.

Constants

EXTENSIONS_READY_TIMEOUT

EXTENSIONS_READY_TIMEOUT_SECS

SessionActor::create bound on EngineHost::extensions_ready(): the loader guard should make this unreachable; it exists so a session can never hang on a loader that never reports (warns, then proceeds).

HOOKS_TIMEOUT

HOOKS_TIMEOUT_SECS

SAVE_TIMEOUT

SAVE_TIMEOUT_SECS

TEARDOWN_TIMEOUT_SECS

UNPARK_TIMEOUT

UNPARK_TIMEOUT_SECS

SessionActor::unpark bound (B3): journal load + runtime rebuild. Transports wait ATTACH_TIMEOUT_PARKED (25 s) for a parked attach.