Managing context windows in production LLM applications is one of those problems that everyone underestimates until their app crashes or costs spiral out of control. Token limits are hard walls, not soft guidelines, and the strategies you choose upfront determine whether your system stays reliable at scale.
Why Context Windows Break Production Apps
Most developers hit context limits the same way: they chain a few prompts together, test with small inputs, ship, then watch the system fail when a user uploads a 50-page PDF. Context windows are finite buffers — once you exceed them, the API returns an error, not a graceful degradation.
The practical pain points:
Input truncation: silently cutting content means the model reasons on incomplete data
