Method applyBeforeLLMCallTransforms

pkg/runtime/transforms.go:74–101

applyBeforeLLMCallTransforms runs every registered [MessageTransform] in chain order, just before the model call and AFTER [LocalRuntime.executeBeforeLLMCallHooks] has approved it. Errors from individual transforms are logged at warn level and the chain continues with the previous slice — a transfor

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

// agent.Model() from a transform would re-randomize the alloy pick
// and miss the per-tool override.
func (r *LocalRuntime) applyBeforeLLMCallTransforms(
	ctx context.Context,
	sess *session.Session,
	a *agent.Agent,
	modelID string,
	msgs []chat.Message,
) []chat.Message {
	if len(r.transforms) == 0 {
		return msgs
	}
	in := &hooks.Input{
		SessionID:     sess.ID,
		AgentName:     a.Name(),
		ModelID:       modelID,
		HookEventName: hooks.EventBeforeLLMCall,
		Cwd:           r.workingDir,
	}
	for _, t := range r.transforms {
		out, err := t.fn(ctx, in, msgs)
		if err != nil {
			slog.WarnContext(ctx, "Message transform failed; continuing with previous messages",
				"transform", t.name, "agent", a.Name(), "error", err)
			continue
		}
		msgs = out
	}
	return msgs
}