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# Why Your Coding Agent Got Worse Halfway Through the Session
- URL: https://debugly.dev/why-coding-agent-gets-worse-long-session/
- Published: 2026-02-10T09:30:00.000Z
- Updated: 2026-10-23T09:13:05.000Z
- Description: It was sharp for an hour and now it is contradicting itself and reintroducing bugs you already fixed. That is context degradation, and it is manageable.
- Author: Rohit Bhadani
- Tags: AI, Debugging, Tooling, Code Review

| Symptom                              | Likely cause                                      |
| ------------------------------------ | ------------------------------------------------- |
| Reintroduces a bug you fixed         | Stale file content still in context               |
| Contradicts an earlier decision      | Compaction lost the reasoning                     |
| Uses an API signature that changed   | Stale read of the file                            |
| Ignores a constraint you stated once | Position, buried in the middle                    |
| Loops between two wrong approaches   | Both failures in context, neither marked terminal |
| Gets slower and more hedged          | Context near capacity                             |

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Related reading: [I Gave Five Models the Same Bug and Noted Each Mistake](https://debugly.dev/five-models-one-bug/) explores a connected angle.

Related reading: [Debugging an MCP Server When the Agent Just Goes Quiet](https://debugly.dev/debugging-mcp-server-tool-calls/) explores a connected angle.

Published on [debugly.dev](https://debugly.dev/) by [Rohit Bhadani](https://debugly.dev/about/) | Founder of [Krova Cloud](https://krova.cloud/?ref=debugly.dev)