f20fdc73d1
* fix(core): preserve Gemini thought_signature on function calls in non-streaming path The Google Gemini API requires thought_signature to be echoed back on function call parts in multi-turn conversations. In the non-streaming request path, the signature was only captured for subsequent function calls (else branch) but dropped for the first/only function call (if branch) in convert_response_to_chat_completion. This caused 400 INVALID_ARGUMENT errors on the next turn. Additionally, when no ReasoningContent existed to carry the signature (e.g. Gemini 2.5 Flash with include_thoughts=False), the signature was lost in the adapter layer. Now it falls through to TextContent. Datadog: https://us5.datadoghq.com/error-tracking/issue/17c4b114-d596-11f0-bcd6-da7ad0900000 🤖 Generated with [Letta Code](https://letta.com) Co-Authored-By: Letta <noreply@letta.com> * fix(core): preserve Gemini thought_signature in non-temporal agent path Carry reasoning_content_signature on TextContent in letta_agent.py at both locations where content falls through from reasoning (same fix already applied to the adapter and temporal activity paths). Co-authored-by: Kian Jones <kianjones9@users.noreply.github.com> 🤖 Generated with [Letta Code](https://letta.com) Co-Authored-By: Letta <noreply@letta.com> --------- Co-authored-by: Letta <noreply@letta.com> Co-authored-by: letta-code <248085862+letta-code@users.noreply.github.com>