Add weighted random workflow steps and a random choice agent tool

internal/store/workflow.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 
 	"g.fc.run/ai/byre/internal/api"
+	"g.fc.run/ai/byre/internal/workflow"
 )
 
 type FrozenWorkflow struct {
@@ -38,7 +39,7 @@ func (s *Store) ListWorkflows(ctx context.Context) ([]api.WorkflowSummary, error
 }
 
 func (s *Store) GetWorkflow(ctx context.Context, name string) (api.WorkflowDefinition, error) {
-	f, err := s.FreezeWorkflow(ctx, name)
+	f, err := s.savedWorkflow(ctx, name)
 	return f.Definition, err
 }
 
@@ -192,6 +193,20 @@ func (s *Store) DeleteWorkflow(ctx context.Context, name, actor string) error {
 }
 
 func (s *Store) FreezeWorkflow(ctx context.Context, name string) (FrozenWorkflow, error) {
+	f, err := s.savedWorkflow(ctx, name)
+	if err != nil || !workflow.HasRandom(f.Definition) {
+		return f, err
+	}
+	f.Definition = workflow.Resolve(f.Definition)
+	err = s.write(ctx, func(tx *sql.Tx, emit emitFunc) error {
+		id, err := insertDefinition(ctx, tx, f.Definition)
+		f.DefinitionID = id
+		return err
+	})
+	return f, err
+}
+
+func (s *Store) savedWorkflow(ctx context.Context, name string) (FrozenWorkflow, error) {
 	f := FrozenWorkflow{Name: name}
 	err := s.db.QueryRowContext(ctx, `SELECT definition_id FROM workflows WHERE name = ?`, name).Scan(&f.DefinitionID)
 	if errors.Is(err, sql.ErrNoRows) {