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* docs: Time travel and breakpoints * fix links * fix * edits * Fix link * Remove circular redirects * revert llms.txt --------- Co-authored-by: Eugene Yurtsev <eyurtsev@gmail.com>
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Time Travel ⏱️
When working with non-deterministic systems that make model-based decisions (e.g., agents powered by LLMs), it can be useful to examine their decision-making process in detail:
- 🤔 Understand reasoning: Analyze the steps that led to a successful result.
- 🐞 Debug mistakes: Identify where and why errors occurred.
- 🔍 Explore alternatives: Test different paths to uncover better solutions.
LangGraph provides time travel functionality to support these use cases. Specifically, you can resume execution from a prior checkpoint — either replaying the same state or modifying it to explore alternatives. In all cases, resuming past execution produces a new fork in the history.
!!! tip
For information on how to use time travel, see [Use time travel](../how-tos/human_in_the_loop/time-travel.md) and [Time travel using Server API](../cloud/how-tos/human_in_the_loop_time_travel.md).