diff --git a/packages/mermaid/src/diagrams/git/gitGraphAst.ts b/packages/mermaid/src/diagrams/git/gitGraphAst.ts
index 0b09a6687..174283670 100644
--- a/packages/mermaid/src/diagrams/git/gitGraphAst.ts
+++ b/packages/mermaid/src/diagrams/git/gitGraphAst.ts
@@ -15,6 +15,7 @@ import { commitType } from './gitGraphTypes.js';
 import { ImperativeState } from '../../utils/imperativeState.js';
 
 import DEFAULT_CONFIG from '../../defaultConfig.js';
+
 import type { GitGraphDiagramConfig } from '../../config.type.js';
 interface GitGraphState {
   commits: Map<string, Commit>;
diff --git a/packages/mermaid/src/diagrams/git/gitGraphTypes.ts b/packages/mermaid/src/diagrams/git/gitGraphTypes.ts
index 0b1b4f714..90156cc58 100644
--- a/packages/mermaid/src/diagrams/git/gitGraphTypes.ts
+++ b/packages/mermaid/src/diagrams/git/gitGraphTypes.ts
@@ -9,13 +9,31 @@ export const commitType = {
   CHERRY_PICK: 4,
 } as const;
 
-export const gitcommitType = {
-  NORMAL: 0,
-  REVERSE: 1,
-  HIGHLIGHT: 2,
-  MERGE: 3,
-  CHERRY_PICK: 4,
-} as const;
+export interface CommitDB {
+  message: string;
+  id: string;
+  type: typeof commitType;
+  tags?: string[];
+}
+
+export interface BranchDB {
+  name: string;
+  order: number;
+}
+
+export interface MergeDB {
+  branch: string;
+  id: string;
+  type?: typeof commitType;
+  tags?: string[];
+}
+
+export interface CherryPickDB {
+  id: string;
+  targetId: string;
+  parent: string;
+  tags?: string[];
+}
 
 export interface Commit {
   id: string;