Coverage for src / lexigram / contracts / workflow / types.py: 100%

1"""Value types for workflow orchestration contracts.""" 

2 

3from __future__ import annotations 

4 

5from dataclasses import dataclass 

6 

7__all__ = ["StateTransitionRecord"] 

8 

9 

10@dataclass(frozen=True) 

11class StateTransitionRecord: 

12 """Immutable record of a persisted state transition. 

13 

14 Attributes: 

15 machine_id: Stable identifier for the state machine instance. 

16 version: Monotonic transition version for optimistic locking. 

17 from_state: Source state name before the transition. 

18 event: Event name that triggered the transition. 

19 to_state: Destination state name after the transition. 

20 transitioned_at: UNIX timestamp (seconds) when transition was stored. 

21 """ 

22 

23 machine_id: str 

24 version: int 

25 from_state: str 

26 event: str 

27 to_state: str 

28 transitioned_at: float