Mastra•5mo ago•

6 replies

Memory and thinking messages

I have this error after a tool call with claude-sonnet-4 : data: {"type":"error","errorText":"messages.3.content.0.type: Expected

thinking

thinking

redacted_thinking

redacted_thinking

, but found

tool_use

tool_use

. When

thinking

thinking

is enabled, a final

assistant

assistant

message must start with a thinking block (preceeding the lastmost set of

tool_use

tool_use

and

tool_result

tool_result

blocks). We recommend you include thinking blocks from previous turns. To avoid this requirement, disable

thinking

thinking

. Please consult our documentation at https://docs.claude.com/en/docs/build-with-claude/extended-thinking"}

Mastra memory provide the thinking part to Agent / Anthropic API ?