feat(workflows): step input params model + cascade step delete

server/internal/models/workflow.go

@@ -6,6 +6,12 @@ import (
 	"go.mongodb.org/mongo-driver/v2/bson"
 )
 
+type InputParam struct {
+	Name        string `bson:"name" json:"name"`
+	Default     string `bson:"default" json:"default"`
+	Description string `bson:"description" json:"description"`
+}
+
 type WorkflowStep struct {
 	ID              bson.ObjectID `bson:"_id,omitempty" json:"-"`
 	StepID          string        `bson:"step_id" json:"step_id"`
@@ -14,17 +20,19 @@ type WorkflowStep struct {
 	Interpreter     string        `bson:"interpreter" json:"interpreter"` // "bash" | "powershell"
 	Script          string        `bson:"script" json:"script"`
 	DeclaredOutputs []string      `bson:"declared_outputs" json:"declared_outputs"`
+	DeclaredInputs  []InputParam  `bson:"declared_inputs" json:"declared_inputs"`
 	SecretRefs      []string      `bson:"secret_refs" json:"secret_refs"`
 	CreatedAt       time.Time     `bson:"created_at" json:"created_at"`
 	UpdatedAt       time.Time     `bson:"updated_at" json:"updated_at"`
 }
 
 type WorkflowStepRef struct {
-	StepID     string        `bson:"step_id" json:"step_id"`
-	Order      int           `bson:"order" json:"order"`
-	OnFailure  string        `bson:"on_failure" json:"on_failure"` // "stop" | "continue" | "retry"
-	MaxRetries int           `bson:"max_retries" json:"max_retries"`
-	Overrides  *StepOverride `bson:"overrides,omitempty" json:"overrides,omitempty"`
+	StepID     string            `bson:"step_id" json:"step_id"`
+	Order      int               `bson:"order" json:"order"`
+	OnFailure  string            `bson:"on_failure" json:"on_failure"` // "stop" | "continue" | "retry"
+	MaxRetries int               `bson:"max_retries" json:"max_retries"`
+	Overrides  *StepOverride     `bson:"overrides,omitempty" json:"overrides,omitempty"`
+	Inputs     map[string]string `bson:"inputs,omitempty" json:"inputs,omitempty"`
 }
 
 type StepOverride struct {
@@ -48,9 +56,10 @@ type ResolvedStep struct {
 	Name        string   `bson:"name" json:"name"`
 	Interpreter string   `bson:"interpreter" json:"interpreter"`
 	Script      string   `bson:"script" json:"script"`
-	SecretRefs  []string `bson:"secret_refs" json:"secret_refs"`
-	OnFailure   string   `bson:"on_failure" json:"on_failure"`
-	MaxRetries  int      `bson:"max_retries" json:"max_retries"`
+	SecretRefs  []string          `bson:"secret_refs" json:"secret_refs"`
+	OnFailure   string            `bson:"on_failure" json:"on_failure"`
+	MaxRetries  int               `bson:"max_retries" json:"max_retries"`
+	Inputs      map[string]string `bson:"inputs" json:"inputs"`
 }
 
 type StepRun struct {

server/internal/services/workflows.go

@@ -66,6 +66,9 @@ func CreateStep(s models.WorkflowStep) (*models.WorkflowStep, error) {
 	if s.SecretRefs == nil {
 		s.SecretRefs = []string{}
 	}
+	if s.DeclaredInputs == nil {
+		s.DeclaredInputs = []models.InputParam{}
+	}
 	if _, err := db.Col("workflow_steps").InsertOne(ctx, s); err != nil {
 		return nil, err
 	}
@@ -81,6 +84,7 @@ func UpdateStep(stepID string, s models.WorkflowStep) error {
 		"interpreter":      s.Interpreter,
 		"script":           s.Script,
 		"declared_outputs": s.DeclaredOutputs,
+		"declared_inputs":  s.DeclaredInputs,
 		"secret_refs":      s.SecretRefs,
 		"updated_at":       time.Now(),
 	}})
@@ -90,8 +94,38 @@ func UpdateStep(stepID string, s models.WorkflowStep) error {
 func DeleteStep(stepID string) error {
 	ctx, cancel := wfCtx()
 	defer cancel()
-	_, err := db.Col("workflow_steps").DeleteOne(ctx, bson.M{"step_id": stepID})
-	return err
+	if _, err := db.Col("workflow_steps").DeleteOne(ctx, bson.M{"step_id": stepID}); err != nil {
+		return err
+	}
+	// Cascade: remove this step from every workflow that references it, re-sequencing orders.
+	cur, err := db.Col("workflows").Find(ctx, bson.M{"steps.step_id": stepID})
+	if err != nil {
+		return err
+	}
+	defer cur.Close(ctx)
+	var wfs []models.Workflow
+	if err := cur.All(ctx, &wfs); err != nil {
+		return err
+	}
+	for _, w := range wfs {
+		kept := make([]models.WorkflowStepRef, 0, len(w.Steps))
+		for _, ref := range w.Steps {
+			if ref.StepID == stepID {
+				continue
+			}
+			kept = append(kept, ref)
+		}
+		for i := range kept {
+			kept[i].Order = i
+		}
+		if _, err := db.Col("workflows").UpdateOne(ctx,
+			bson.M{"workflow_id": w.WorkflowID},
+			bson.M{"$set": bson.M{"steps": kept, "updated_at": time.Now()}},
+		); err != nil {
+			return err
+		}
+	}
+	return nil
 }
 
 func getStep(ctx context.Context, stepID string) (*models.WorkflowStep, error) {