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

is_image_output

Return true only for payloads that tool_result_to_messages will map to an actual image follow-up. Callers use this to avoid retaining malformed image-shaped JSON without normal result-size bounds.

is_image_value 🔒

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.