diff --git a/packages/patchlogr-core/src/index.ts b/packages/patchlogr-core/src/index.ts
index e69de29..4cc1e96 100644
--- a/packages/patchlogr-core/src/index.ts
+++ b/packages/patchlogr-core/src/index.ts
@@ -0,0 +1 @@
+export * from "./partition";
diff --git a/packages/patchlogr-core/src/partition/__tests__/partitionByMethod.test.ts b/packages/patchlogr-core/src/partition/__tests__/partitionByMethod.test.ts
index 294ebba..44bbeab 100644
--- a/packages/patchlogr-core/src/partition/__tests__/partitionByMethod.test.ts
+++ b/packages/patchlogr-core/src/partition/__tests__/partitionByMethod.test.ts
@@ -1,6 +1,7 @@
 import type { CanonicalSpec } from "@patchlogr/types";
 import { describe, expect, test } from "vitest";
 import { partitionByMethod } from "../partitionByMethod";
+import type { HashInternalNode } from "../partition";
 
 describe("partitionByMethod", () => {
     test("should group by HTTPMethod", () => {
@@ -25,13 +26,22 @@ describe("partitionByMethod", () => {
             },
         };
 
-        const partitions = partitionByMethod(spec).partitions;
-        expect(partitions).toHaveLength(1);
-        expect(partitions.get("GET")).toHaveLength(2);
-        expect(partitions.get("GET")?.[0]?.operationKey).toBe("GET /user");
-        expect(partitions.get("GET")?.[1]?.operationKey).toBe(
-            "GET /user/{userId}",
-        );
+        const result = partitionByMethod(spec);
+        expect(result.root.type).toBe("node");
+        expect(result.root.key).toBe("root");
+
+        const root = result.root as HashInternalNode;
+        expect(root.children).toHaveLength(1);
+
+        const getMethodNode = root.children.find(
+            (child) => child.key === "GET",
+        ) as HashInternalNode;
+
+        expect(getMethodNode).toBeDefined();
+        expect(getMethodNode.type).toBe("node");
+        expect(getMethodNode.children).toHaveLength(2);
+        expect(getMethodNode.children[0]?.key).toBe("GET /user");
+        expect(getMethodNode.children[1]?.key).toBe("GET /user/{userId}");
     });
 
     test("should group by multiple HTTPMethods", () => {
@@ -56,14 +66,26 @@ describe("partitionByMethod", () => {
             },
         };
 
-        const partitions = partitionByMethod(spec).partitions;
+        const result = partitionByMethod(spec);
+        expect(result.root.type).toBe("node");
+
+        const root = result.root as HashInternalNode;
+        expect(root.children).toHaveLength(2);
+
+        const getMethodNode = root.children.find(
+            (child) => child.key === "GET",
+        ) as HashInternalNode;
+        const postMethodNode = root.children.find(
+            (child) => child.key === "POST",
+        ) as HashInternalNode;
+
+        expect(getMethodNode).toBeDefined();
+        expect(postMethodNode).toBeDefined();
+
+        expect(getMethodNode.children).toHaveLength(1);
+        expect(getMethodNode.children[0]?.key).toBe("GET /user");
 
-        expect(partitions).toHaveLength(2);
-        expect(partitions.get("GET")).toHaveLength(1);
-        expect(partitions.get("POST")).toHaveLength(1);
-        expect(partitions.get("GET")?.[0]?.operationKey).toBe("GET /user");
-        expect(partitions.get("POST")?.[0]?.operationKey).toBe(
-            "POST /auth/login",
-        );
+        expect(postMethodNode.children).toHaveLength(1);
+        expect(postMethodNode.children[0]?.key).toBe("POST /auth/login");
     });
 });
diff --git a/packages/patchlogr-core/src/partition/__tests__/partitionByTag.test.ts b/packages/patchlogr-core/src/partition/__tests__/partitionByTag.test.ts
index d546346..cb35c33 100644
--- a/packages/patchlogr-core/src/partition/__tests__/partitionByTag.test.ts
+++ b/packages/patchlogr-core/src/partition/__tests__/partitionByTag.test.ts
@@ -1,6 +1,7 @@
 import type { CanonicalSpec } from "@patchlogr/types";
 import { describe, expect, test } from "vitest";
 import { DEFAULT_TAG, partitionByTag } from "../partitionByTag";
+import type { HashInternalNode } from "../partition";
 
 describe("partitionByTag", () => {
     test("should group by first tag", () => {
@@ -25,13 +26,21 @@ describe("partitionByTag", () => {
             },
         };
 
-        const partitions = partitionByTag(spec).partitions;
-        expect(partitions).toHaveLength(1);
-        expect(partitions.get("user")).toHaveLength(2);
-        expect(partitions.get("user")?.[0]?.operationKey).toBe("GET /user");
-        expect(partitions.get("user")?.[1]?.operationKey).toBe(
-            "GET /user/{userId}",
-        );
+        const result = partitionByTag(spec);
+        expect(result.root.type).toBe("node");
+        expect(result.root.key).toBe("root");
+
+        const root = result.root as HashInternalNode;
+        expect(root.children).toHaveLength(1);
+
+        const userTagNode = root.children.find(
+            (child) => child.key === "user",
+        ) as HashInternalNode;
+
+        expect(userTagNode.type).toBe("node");
+        expect(userTagNode.children).toHaveLength(2);
+        expect(userTagNode.children[0]?.key).toBe("GET /user");
+        expect(userTagNode.children[1]?.key).toBe("GET /user/{userId}");
     });
 
     test("should group by multiple tags", () => {
@@ -56,15 +65,24 @@ describe("partitionByTag", () => {
             },
         };
 
-        const partitions = partitionByTag(spec).partitions;
+        const result = partitionByTag(spec);
+        expect(result.root.type).toBe("node");
+
+        const root = result.root as HashInternalNode;
+        expect(root.children).toHaveLength(2);
 
-        expect(partitions).toHaveLength(2);
-        expect(partitions.get("user")).toHaveLength(1);
-        expect(partitions.get("auth")).toHaveLength(1);
-        expect(partitions.get("user")?.[0]?.operationKey).toBe("GET /user");
-        expect(partitions.get("auth")?.[0]?.operationKey).toBe(
-            "POST /auth/login",
-        );
+        const userTagNode = root.children.find(
+            (child) => child.key === "user",
+        ) as HashInternalNode;
+        const authTagNode = root.children.find(
+            (child) => child.key === "auth",
+        ) as HashInternalNode;
+
+        expect(userTagNode.children).toHaveLength(1);
+        expect(userTagNode.children[0]?.key).toBe("GET /user");
+
+        expect(authTagNode.children).toHaveLength(1);
+        expect(authTagNode.children[0]?.key).toBe("POST /auth/login");
     });
 
     test("should group into default tag if tag not exists", () => {
@@ -81,12 +99,18 @@ describe("partitionByTag", () => {
             },
         };
 
-        const partitions = partitionByTag(spec).partitions;
+        const result = partitionByTag(spec);
+        expect(result.root.type).toBe("node");
+
+        const root = result.root as HashInternalNode;
+        expect(root.children).toHaveLength(1);
+
+        const defaultTagNode = root.children.find(
+            (child) => child.key === DEFAULT_TAG,
+        ) as HashInternalNode;
 
-        expect(partitions).toHaveLength(1);
-        expect(partitions.get(DEFAULT_TAG)).toHaveLength(1);
-        expect(partitions.get(DEFAULT_TAG)?.[0]?.operationKey).toBe(
-            "GET /user",
-        );
+        expect(defaultTagNode.type).toBe("node");
+        expect(defaultTagNode.children).toHaveLength(1);
+        expect(defaultTagNode.children[0]?.key).toBe("GET /user");
     });
 });
diff --git a/packages/patchlogr-core/src/partition/index.ts b/packages/patchlogr-core/src/partition/index.ts
new file mode 100644
index 0000000..f70810c
--- /dev/null
+++ b/packages/patchlogr-core/src/partition/index.ts
@@ -0,0 +1,4 @@
+export type { Hash, HashNode, PartitionedSpec } from "./partition";
+
+export { partitionByMethod } from "./partitionByMethod";
+export { partitionByTag } from "./partitionByTag";
diff --git a/packages/patchlogr-core/src/partition/partition.ts b/packages/patchlogr-core/src/partition/partition.ts
index 2fd755b..59bb6c1 100644
--- a/packages/patchlogr-core/src/partition/partition.ts
+++ b/packages/patchlogr-core/src/partition/partition.ts
@@ -1,10 +1,24 @@
-export type Partition = {
-    hash: string;
-    operationKey: string;
+export type Hash = string;
+
+export type HashInternalNode<K = string, V = unknown> = {
+    type: "node";
+    key: K;
+    hash: Hash;
+    children: HashNode<K, V>[];
+};
+
+export type HashLeafNode<K = string, V = unknown> = {
+    type: "leaf";
+    key: K;
+    hash: Hash;
+    value: V;
 };
 
-export type PartitionedSpec = {
-    hash: string;
+export type HashNode<K = string, V = unknown> =
+    | HashInternalNode<K, V>
+    | HashLeafNode<K, V>;
+
+export type PartitionedSpec<K, V = unknown> = {
+    root: HashNode<K, V>;
     metadata: Record<string, unknown>;
-    partitions: Map<string, Partition[]>;
 };
diff --git a/packages/patchlogr-core/src/partition/partitionByMethod.ts b/packages/patchlogr-core/src/partition/partitionByMethod.ts
index 8804bb0..a6f954b 100644
--- a/packages/patchlogr-core/src/partition/partitionByMethod.ts
+++ b/packages/patchlogr-core/src/partition/partitionByMethod.ts
@@ -1,27 +1,70 @@
-import type { CanonicalSpec, HTTPMethod } from "@patchlogr/types";
-import type { Partition, PartitionedSpec } from "./partition";
+import type {
+    CanonicalSpec,
+    HTTPMethod,
+    CanonicalOperation,
+} from "@patchlogr/types";
+import type { PartitionedSpec, HashNode } from "./partition";
 
 import { createSHA256Hash } from "../utils/createHash";
 import { stableStringify } from "../utils/stableStringify";
 
-export function partitionByMethod(spec: CanonicalSpec): PartitionedSpec {
-    const partitions = new Map<HTTPMethod, Partition[]>();
+export function partitionByMethod(
+    spec: CanonicalSpec,
+): PartitionedSpec<string, CanonicalOperation> {
+    const methodGroups = new Map<
+        HTTPMethod,
+        Array<{ key: string; operation: CanonicalOperation }>
+    >();
 
     Object.entries(spec.operations).forEach(([key, operation]) => {
-        const hash = createSHA256Hash(stableStringify(operation));
+        if (!methodGroups.has(operation.method)) {
+            methodGroups.set(operation.method, []);
+        }
+        methodGroups.get(operation.method)?.push({
+            key: key,
+            operation,
+        });
+    });
+
+    const methodNodes: HashNode<string, CanonicalOperation>[] = [];
+
+    methodGroups.forEach((operations, method) => {
+        const operationLeaves: HashNode<string, CanonicalOperation>[] =
+            operations.map(({ key, operation }) => ({
+                type: "leaf",
+                key,
+                hash: createSHA256Hash(stableStringify(operation)),
+                value: operation,
+            }));
+
+        const methodHash = createSHA256Hash(
+            stableStringify(operationLeaves.map((leaf) => leaf.hash)),
+        );
 
-        if (!partitions.has(operation.method))
-            partitions.set(operation.method, [{ hash, operationKey: key }]);
-        else
-            partitions.get(operation.method)?.push({ hash, operationKey: key });
+        methodNodes.push({
+            type: "node",
+            key: method,
+            hash: methodHash,
+            children: operationLeaves,
+        });
     });
 
+    const rootHash = createSHA256Hash(
+        stableStringify(methodNodes.map((node) => node.hash)),
+    );
+
+    const root: HashNode<string, CanonicalOperation> = {
+        type: "node",
+        key: "root",
+        hash: rootHash,
+        children: methodNodes,
+    };
+
     return {
-        hash: createSHA256Hash(stableStringify(spec)),
+        root,
         metadata: {
             ...spec.info,
             ...spec.security,
         },
-        partitions,
     };
 }
diff --git a/packages/patchlogr-core/src/partition/partitionByTag.ts b/packages/patchlogr-core/src/partition/partitionByTag.ts
index f8a9699..9989f37 100644
--- a/packages/patchlogr-core/src/partition/partitionByTag.ts
+++ b/packages/patchlogr-core/src/partition/partitionByTag.ts
@@ -1,29 +1,74 @@
-import type { CanonicalSpec } from "@patchlogr/types";
-import type { Partition, PartitionedSpec } from "./partition";
+import type {
+    CanonicalSpec,
+    CanonicalOperation,
+    OperationKey,
+} from "@patchlogr/types";
+import type { PartitionedSpec, HashNode } from "./partition";
 
 import { createSHA256Hash } from "../utils/createHash";
 import { stableStringify } from "../utils/stableStringify";
 
 export const DEFAULT_TAG = "__DEFAULT__";
 
-export function partitionByTag(spec: CanonicalSpec): PartitionedSpec {
-    const partitions = new Map<string, Partition[]>();
+export function partitionByTag(
+    spec: CanonicalSpec,
+): PartitionedSpec<string, CanonicalOperation> {
+    const tagGroups = new Map<
+        string,
+        Array<{ key: string; operation: CanonicalOperation }>
+    >();
 
     Object.entries(spec.operations).forEach(([key, operation]) => {
         const tag = operation.doc?.tags?.[0] || DEFAULT_TAG;
-        const hash = createSHA256Hash(stableStringify(operation));
 
-        if (!partitions.has(tag))
-            partitions.set(tag, [{ hash, operationKey: key }]);
-        else partitions.get(tag)?.push({ hash, operationKey: key });
+        if (!tagGroups.has(tag)) {
+            tagGroups.set(tag, []);
+        }
+        tagGroups.get(tag)?.push({
+            key: key as OperationKey,
+            operation,
+        });
     });
 
+    const tagNodes: HashNode<string, CanonicalOperation>[] = [];
+
+    tagGroups.forEach((operations, tag) => {
+        const operationLeaves: HashNode<string, CanonicalOperation>[] =
+            operations.map(({ key, operation }) => ({
+                type: "leaf",
+                key,
+                hash: createSHA256Hash(stableStringify(operation)),
+                value: operation,
+            }));
+
+        const tagHash = createSHA256Hash(
+            stableStringify(operationLeaves.map((leaf) => leaf.hash)),
+        );
+
+        tagNodes.push({
+            type: "node",
+            key: tag,
+            hash: tagHash,
+            children: operationLeaves,
+        });
+    });
+
+    const rootHash = createSHA256Hash(
+        stableStringify(tagNodes.map((node) => node.hash)),
+    );
+
+    const root: HashNode<string, CanonicalOperation> = {
+        type: "node",
+        key: "root",
+        hash: rootHash,
+        children: tagNodes,
+    };
+
     return {
-        hash: createSHA256Hash(stableStringify(spec)),
+        root,
         metadata: {
             ...spec.info,
             ...spec.security,
         },
-        partitions,
     };
 }
diff --git a/packages/patchlogr-core/src/utils/stableStringify.ts b/packages/patchlogr-core/src/utils/stableStringify.ts
index f9143b3..bd3a068 100644
--- a/packages/patchlogr-core/src/utils/stableStringify.ts
+++ b/packages/patchlogr-core/src/utils/stableStringify.ts
@@ -1,4 +1,4 @@
-export function stableStringify(obj: Record<string, unknown>): string {
+export function stableStringify(obj: any): string {
     return JSON.stringify(sortObjectKeys(obj));
 }