feat: add token-aware context limiting for Addie#738
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Conversation
Prevents "prompt is too long" errors when conversation history exceeds Claude's 200K token limit. The system now: - Estimates token counts locally using character-based heuristic - Reserves ~50K tokens for system prompt, tools, and safety margin - Trims oldest messages when conversation exceeds ~150K tokens - Truncates single messages that exceed the limit - Logs when trimming occurs for debugging Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Summary
Test plan
🤖 Generated with Claude Code