Module middleware 

ChatMiddleware extension point and its decision enums (HookAction, ToolDecision).

Enums

HookAction

Decision returned from ChatMiddleware::on_run_started to optionally short-circuit a run before any provider call.

ToolDecision

Decision returned from ChatMiddleware::on_before_tool_call to optionally bypass or abort a tool invocation.

Traits

ChatMiddleware

Extension point invoked by the engine at every lifecycle event of a run.