diff --git a/understand-anything-plugin/packages/core/src/__tests__/domain-normalize.test.ts b/understand-anything-plugin/packages/core/src/__tests__/domain-normalize.test.ts
new file mode 100644
index 0000000..77bd37f
--- /dev/null
+++ b/understand-anything-plugin/packages/core/src/__tests__/domain-normalize.test.ts
@@ -0,0 +1,37 @@
+import { describe, it, expect } from "vitest";
+import { normalizeNodeId } from "../analyzer/normalize-graph.js";
+
+describe("domain node ID normalization", () => {
+  it("normalizes domain node IDs", () => {
+    const result = normalizeNodeId("domain:order-management", {
+      type: "domain",
+      name: "Order Management",
+    });
+    expect(result).toBe("domain:order-management");
+  });
+
+  it("normalizes flow node IDs", () => {
+    const result = normalizeNodeId("flow:create-order", {
+      type: "flow",
+      name: "Create Order",
+    });
+    expect(result).toBe("flow:create-order");
+  });
+
+  it("normalizes step node IDs with filePath", () => {
+    const result = normalizeNodeId("step:create-order:validate", {
+      type: "step",
+      name: "Validate",
+      filePath: "src/validators/order.ts",
+    });
+    expect(result).toBe("step:src/validators/order.ts:validate");
+  });
+
+  it("normalizes step node IDs without filePath", () => {
+    const result = normalizeNodeId("step:validate", {
+      type: "step",
+      name: "Validate",
+    });
+    expect(result).toBe("step:validate");
+  });
+});
diff --git a/understand-anything-plugin/packages/core/src/analyzer/normalize-graph.ts b/understand-anything-plugin/packages/core/src/analyzer/normalize-graph.ts
index 9409693..f8c7698 100644
--- a/understand-anything-plugin/packages/core/src/analyzer/normalize-graph.ts
+++ b/understand-anything-plugin/packages/core/src/analyzer/normalize-graph.ts
@@ -2,6 +2,7 @@ const VALID_PREFIXES = new Set([
   "file", "func", "class", "module", "concept",
   "config", "document", "service", "table", "endpoint",
   "pipeline", "schema", "resource",
+  "domain", "flow", "step",
 ]);
 
 const TYPE_TO_PREFIX: Record<string, string> = {
@@ -18,6 +19,9 @@ const TYPE_TO_PREFIX: Record<string, string> = {
   pipeline: "pipeline",
   schema: "schema",
   resource: "resource",
+  domain: "domain",
+  flow: "flow",
+  step: "step",
 };
 
 /**
@@ -68,6 +72,13 @@ export function normalizeNodeId(
   const { prefix, path } = stripToValidPrefix(trimmed);
 
   if (prefix) {
+    // For step nodes with filePath, reconstruct as step:filePath:stepSlug
+    if (node.type === "step" && node.filePath) {
+      // Use the last colon-separated segment of the path as the step slug
+      const lastColon = path.lastIndexOf(":");
+      const stepSlug = lastColon >= 0 ? path.slice(lastColon + 1) : path;
+      return `${prefix}:${node.filePath}:${stepSlug}`;
+    }
     return `${prefix}:${path}`;
   }