Module history 

Structs

ToolResultHistory

Output of tool_result_to_messages: messages that go in tool role, plus optional follow-up user messages (e.g. for an image attachment).

Functions

decode_string_output

Extract std_msgs/String.data from a tool’s JSON output. Accepts either raw text (returned verbatim) or {"data": "..."}.

sanitize_for_vlm

Filter history to a form OpenAI-compatible endpoints accept: every tool message must be preceded by an assistant whose tool_calls lists its tool_call_id. Orphans (e.g. left over from a trim that dropped the assistant) are quietly removed.

tool_result_to_messages

Build history messages from one executor tool result.

trim

Drop the oldest messages so history.len() <= max. No-op if already short.