Durable Execution & Checkpointing(DE)

Persists workflow and agent state at every step so long-running runs can crash-resume from the last checkpoint, replay deterministically without repeating completed work, pause and resume for human input, and time-travel by forking from an earlier checkpoint. Checkpointer-backed graph engines such as LangGraph and Temporal-style durable engines provide the substrate for reliable, long-lived, human-in-the-loop agents.