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- Fix `invalid message content type: <nil>` error from Ollama - Create TatlockOllamaProvider that sanitizes messages (null → "") - Update all agents to use sanitized provider - Fix repeating think messages by adding ReasoningSummaryDone signal 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>