Method executeBeforeLLMCallHooks

pkg/runtime/hooks.go:419–448

executeBeforeLLMCallHooks fires before_llm_call just before each model call. A terminating verdict (decision="block" / continue=false exit 2) stops the run loop — see [hooks.EventBeforeLLMCall] for the contract. Hooks that just want to contribute system messages should target turn_start instead. mo

(
	ctx context.Context,
	sess *session.Session,
	a *agent.Agent,
	modelID string,
	iteration int,
	messages []chat.Message,
)

// swap the rewrite in BEFORE the model call so the LLM never sees the
// original content.
func (r *LocalRuntime) executeBeforeLLMCallHooks(
	ctx context.Context,
	sess *session.Session,
	a *agent.Agent,
	modelID string,
	iteration int,
	messages []chat.Message,
) (stop bool, message string, rewritten []chat.Message) {
	exec := r.hooksExec(a)
	if exec == nil || !exec.Has(hooks.EventBeforeLLMCall) {
		return false, "", nil
	}
	// Only carry the conversation snapshot when at least one hook is
	// actually wired — dispatchHook short-circuits before then, but the
	// JSON-encoded copy of `messages` would still be paid here.
	result := r.dispatchHook(ctx, a, hooks.EventBeforeLLMCall, &hooks.Input{
		SessionID: sess.ID,
		AgentName: a.Name(),
		ModelID:   modelID,
		Iteration: iteration,
		Messages:  messages,
	}, nil)
	if result == nil {
		return false, "", nil
	}
	if !result.Allowed {
		return true, result.Message, nil
	}
	return false, "", result.UpdatedMessages
}

// executeAfterLLMCallHooks fires after_llm_call after a successful
// model call, before the response is recorded into the session and