snapshot of https://github.com/ory/keto.git (master, 2026-09-16; blobs > 131072B omitted)

internal/check/step.go

@@ -0,0 +1,32 @@
+// Copyright © 2026 Ory Corp
+// SPDX-License-Identifier: Apache-2.0
+
+package check
+
+import (
+	"context"
+)
+
+// StepKind identifies the execution model type of a Step.
+type StepKind string
+
+const (
+	StepIsAllowed   StepKind = "is_allowed"
+	StepDirect      StepKind = "direct"
+	StepDirectMulti StepKind = "direct_multi"
+	StepExpand      StepKind = "expand_subject"
+	StepComputed    StepKind = "computed"
+	StepTraverse    StepKind = "traverse"
+	StepRewrite     StepKind = "rewrite"
+	StepInvert      StepKind = "invert"
+)
+
+// Step is a single unit of execution within the permission check engine.
+type Step interface {
+	// Kind returns the execution-model kind of this step.
+	Kind() StepKind
+
+	// Execute performs the step's work and returns the membership result.
+	// Child steps must be dispatched through ex, not called directly.
+	Execute(ctx context.Context, req CheckRequest, ex Executor) Result
+}