diff --git a/clients/tabby-agent/src/codeLens.ts b/clients/tabby-agent/src/codeLens.ts
index 848dadd5faf4..0008bf5ca2b8 100644
--- a/clients/tabby-agent/src/codeLens.ts
+++ b/clients/tabby-agent/src/codeLens.ts
@@ -7,10 +7,13 @@ import {
   WorkDoneProgressReporter,
   ResultProgressReporter,
   CodeLensParams,
+  Position,
 } from "vscode-languageserver";
 import { ClientCapabilities, ServerCapabilities, CodeLens, CodeLensType, ChangesPreviewLineType } from "./protocol";
 import { TextDocuments } from "./lsp/textDocuments";
 import { TextDocument } from "vscode-languageserver-textdocument";
+import { getLogger } from "./logger";
+import { diffChars } from "diff";
 
 const codeLensType: CodeLensType = "previewChanges";
 const changesPreviewLineType = {
@@ -25,6 +28,8 @@ const changesPreviewLineType = {
   deleted: "deleted" as ChangesPreviewLineType,
 };
 
+const logger = getLogger('CodeLensProvider');
+
 export class CodeLensProvider implements Feature {
   constructor(private readonly documents: TextDocuments<TextDocument>) {}
 
@@ -57,6 +62,9 @@ export class CodeLensProvider implements Feature {
     const codeLenses: CodeLens[] = [];
     let lineInPreviewBlock = -1;
     let previewBlockMarkers = "";
+    const originLines: string[] = [];
+    const editLines: string[] = [];
+    const editCodeLenses: CodeLens[] = []
     for (let line = textDocument.lineCount - 1; line >= 0; line = line - 1) {
       if (token.isCancellationRequested) {
         return null;
@@ -166,6 +174,9 @@ export class CodeLensProvider implements Feature {
                   line: changesPreviewLineType.waiting,
                 },
               };
+              originLines.unshift(text)
+              editLines.unshift(text)
+              editCodeLenses.unshift(codeLens)
               break;
             case "|":
               codeLens = {
@@ -175,6 +186,8 @@ export class CodeLensProvider implements Feature {
                   line: changesPreviewLineType.inProgress,
                 },
               };
+              editLines.unshift(text)
+              editCodeLenses.unshift(codeLens)
               break;
             case "=":
               codeLens = {
@@ -184,6 +197,9 @@ export class CodeLensProvider implements Feature {
                   line: changesPreviewLineType.unchanged,
                 },
               };
+              originLines.unshift(text)
+              editLines.unshift(text)
+              editCodeLenses.unshift(codeLens)
               break;
             case "+":
               codeLens = {
@@ -193,6 +209,8 @@ export class CodeLensProvider implements Feature {
                   line: changesPreviewLineType.inserted,
                 },
               };
+              editLines.unshift(text)
+              editCodeLenses.unshift(codeLens)
               break;
             case "-":
               codeLens = {
@@ -202,6 +220,7 @@ export class CodeLensProvider implements Feature {
                   line: changesPreviewLineType.deleted,
                 },
               };
+              originLines.unshift(text)
               break;
             default:
               break;
@@ -219,6 +238,10 @@ export class CodeLensProvider implements Feature {
         }
       }
     }
+    const charDecorationLenses = this.getCharDiffDecoration(originLines, editLines, editCodeLenses)
+    codeLenses.push(...charDecorationLenses)
+    logger.debug(`codeLenses: ${JSON.stringify(codeLenses)}`)
+
     workDoneProgress?.done();
     if (resultProgress) {
       return null;
@@ -226,4 +249,61 @@ export class CodeLensProvider implements Feature {
       return codeLenses;
     }
   }
+
+  getCharDiffDecoration(originLines: string[], editLines: string[], editCodeLenses: CodeLens[]) {
+    const editCharCodeLenses: CodeLens[] = []
+    const changes = diffChars(originLines.join(''), editLines.join(''))
+    let index = 0;
+    changes.forEach(item => {
+      if (item.added) {
+        const position = this.getPositionFromIndex(index, editCodeLenses)
+        const codeLensRange: Range = {
+          start: position,
+          end: { line: position.line, character: position.character + (item.count??0) },
+        };
+        const codeLens = {
+          range: codeLensRange,
+          data: {
+            type: codeLensType,
+            text: 'inserted' as const,
+          },
+        };
+        editCharCodeLenses.push(codeLens)
+      } else if(item.removed) {
+        // nothing
+      } else {
+        index += item.count ?? 0
+      }
+    })
+    return editCharCodeLenses
+  }
+
+  getPositionFromIndex(index: number, editCodeLenses: CodeLens[]): Position {
+    let line = 0;
+    let character = 0;
+    let length = 0;
+    for (let i = 0; i < editCodeLenses.length; i++) {
+      const item = editCodeLenses[i];
+      const range = item?.range;
+      if (!range) {
+        continue
+      }
+       const rangeLength = range.end.character - range.start.character + length
+       if (index >= length && index <= rangeLength) {
+        line = range.start.line
+        character = index - length
+        return {
+          line,
+          character
+        }
+       } else {
+        length = rangeLength
+       }
+    }
+
+    return {
+      line,
+      character
+    }
+  }
 }
diff --git a/clients/tabby-agent/src/protocol.ts b/clients/tabby-agent/src/protocol.ts
index 63006e711d5e..8f9477d7e2f9 100644
--- a/clients/tabby-agent/src/protocol.ts
+++ b/clients/tabby-agent/src/protocol.ts
@@ -275,6 +275,7 @@ export type CodeLens = LspCodeLens & {
   data?: {
     type: CodeLensType;
     line?: ChangesPreviewLineType;
+    text?: ChangesPreviewTextType;
   };
 };
 
@@ -290,6 +291,8 @@ export type ChangesPreviewLineType =
   | "inserted"
   | "deleted";
 
+export type  ChangesPreviewTextType = "inserted"| "deleted"
+
 /**
  * Extends LSP method Completion Request(↩️)
  *
diff --git a/clients/vscode/src/lsp/CodeLensMiddleware.ts b/clients/vscode/src/lsp/CodeLensMiddleware.ts
index 9a9cfd28ef84..520f4c42a366 100644
--- a/clients/vscode/src/lsp/CodeLensMiddleware.ts
+++ b/clients/vscode/src/lsp/CodeLensMiddleware.ts
@@ -39,13 +39,18 @@ const decorationTypePending = window.createTextEditorDecorationType({
   isWholeLine: true,
   rangeBehavior: DecorationRangeBehavior.ClosedClosed,
 });
-const decorationTypeInserted = window.createTextEditorDecorationType({
+const decorationTypeTextInserted = window.createTextEditorDecorationType({
   backgroundColor: new ThemeColor("diffEditor.insertedTextBackground"),
+  isWholeLine: false,
+  rangeBehavior: DecorationRangeBehavior.ClosedOpen,
+});
+const decorationTypeLineInserted = window.createTextEditorDecorationType({
+  backgroundColor: new ThemeColor("diffEditor.insertedLineBackground"),
   isWholeLine: true,
   rangeBehavior: DecorationRangeBehavior.ClosedClosed,
 });
 const decorationTypeDeleted = window.createTextEditorDecorationType({
-  backgroundColor: new ThemeColor("diffEditor.removedTextBackground"),
+  backgroundColor: new ThemeColor("diffEditor.removedLineBackground"),
   isWholeLine: true,
   rangeBehavior: DecorationRangeBehavior.ClosedClosed,
 });
@@ -55,12 +60,16 @@ const decorationTypes: Record<string, TextEditorDecorationType> = {
   commentsFirstLine: decorationTypeComments,
   comments: decorationTypeComments,
   waiting: decorationTypePending,
-  inProgress: decorationTypeInserted,
+  inProgress: decorationTypeLineInserted,
   unchanged: decorationTypeUnchanged,
-  inserted: decorationTypeInserted,
+  inserted: decorationTypeLineInserted,
   deleted: decorationTypeDeleted,
 };
 
+const textDecorationTypes: Record<string, TextEditorDecorationType> = {
+  inserted: decorationTypeTextInserted,
+}
+
 export class CodeLensMiddleware implements VscodeLspCodeLensMiddleware {
   private readonly decorationMap = new Map<TextEditor, Map<TextEditorDecorationType, Range[]>>();
 
@@ -100,6 +109,13 @@ export class CodeLensMiddleware implements VscodeLspCodeLensMiddleware {
         this.addDecorationRange(editor, decorationType, decorationRange);
       }
     }
+    const textType = codeLens.data.text
+    if (typeof textType === "string" && textType in textDecorationTypes) {
+      const decorationType = textDecorationTypes[textType];
+      if (decorationType) {
+        this.addDecorationRange(editor, decorationType, decorationRange);
+      }
+    }
     if (codeLens.data.line === "header") {
       return codeLens;
     }