Feature Request: Auto-compact to prevent CAPIError 400 before the error not after. #2008
Description
Describe the feature or problem you'd like to solve
In long sessions (190+ messages), the conversation context exceeds API limits causing CAPIError: 400 Bad Request, which kills the current turn and loses work in progress.
Proposed solution
Feature Request: Auto-compact to prevent CAPIError 400
In long sessions (190+ messages), the conversation context exceeds API limits causing CAPIError: 400 Bad Request, which kills the current turn and loses work in progress. Please add an auto_compact config option (e.g., in ~/.copilot/config.json) that automatically triggers compaction when context usage exceeds a configurable threshold (e.g., 80%). This would prevent the error entirely without requiring manual /compact intervention. Long coding sessions with iterative development are a core use case and shouldn't require users to monitor context size manually.
Example prompts or workflows
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Additional context
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