Method executeUserPromptSubmitHooks

pkg/runtime/hooks.go:548–560

executeUserPromptSubmitHooks fires user_prompt_submit once per user message, after the prompt has been added to the session and before the first model call of the turn. A terminating verdict (decision="block" / continue=false / exit 2) stops the run loop; AdditionalContext is returned as a transient

(ctx context.Context, sess *session.Session, a *agent.Agent, prompt string, events EventSink)

// AdditionalContext is returned as a transient system message that
// callers splice into the conversation for that turn only.
func (r *LocalRuntime) executeUserPromptSubmitHooks(ctx context.Context, sess *session.Session, a *agent.Agent, prompt string, events EventSink) (stop bool, message string, contextMsgs []chat.Message) {
	result := r.dispatchHook(ctx, a, hooks.EventUserPromptSubmit, &hooks.Input{
		SessionID: sess.ID,
		Prompt:    prompt,
	}, events)
	if result == nil {
		return false, "", nil
	}
	if !result.Allowed {
		return true, result.Message, nil
	}
	return false, "", contextMessages(result)
}

// executeUserSteeringMessagesSubmitHooks fires
// user_steering_messages_submit each time the runtime drains the