diff --git a/src/ai/parse-ai-codegen-response.ts b/src/ai/parse-ai-codegen-response.ts
index 33b58cf..0d8ff52 100644
--- a/src/ai/parse-ai-codegen-response.ts
+++ b/src/ai/parse-ai-codegen-response.ts
@@ -55,7 +55,9 @@ export function parseAICodegenResponse(response: string): AIParsedResponse {
     }
 
     // Parse other fields
-    result.gitBranchName = parseField(response, 'git_branch_name');
+    result.gitBranchName =
+      parseField(response, 'git_branch_name') ||
+      `feature/ai-task-${Date.now()}`;
     result.gitCommitMessage = parseField(response, 'git_commit_message');
     result.summary = parseField(response, 'summary');
     result.potentialIssues = parseField(response, 'potential_issues');
diff --git a/src/ai/task-workflow.ts b/src/ai/task-workflow.ts
index 3e22518..dd32d39 100644
--- a/src/ai/task-workflow.ts
+++ b/src/ai/task-workflow.ts
@@ -9,7 +9,7 @@ import { applyChanges } from '../git/apply-changes';
 import { selectFilesPrompt } from '../interactive/select-files-prompt';
 import type { AiAssistedTaskOptions, MarkdownOptions } from '../types';
 import { DEFAULT_CACHE_PATH } from '../utils/cache-utils';
-import { ensureBranch } from '../utils/git-tools';
+import { ensureBranch, ensureValidBranchName } from '../utils/git-tools';
 import {
   collectVariables,
   extractTemplateVariables,
@@ -196,6 +196,10 @@ export async function runAIAssistedTask(options: AiAssistedTaskOptions) {
 
     const parsedResponse = parseAICodegenResponse(generatedCode);
 
+    parsedResponse.gitBranchName = ensureValidBranchName(
+      parsedResponse.gitBranchName,
+    );
+
     if (options.dryRun) {
       spinner.info(
         chalk.yellow(
diff --git a/src/utils/git-tools.ts b/src/utils/git-tools.ts
index 24dc066..5fc77fa 100644
--- a/src/utils/git-tools.ts
+++ b/src/utils/git-tools.ts
@@ -32,6 +32,21 @@ export async function prReview(prNumber: string): Promise<FileInfo[]> {
   return [];
 }
 
+export function ensureValidBranchName(branchName: string): string {
+  // Remove any characters that are not allowed in Git branch names
+  let sanitizedName = branchName.replace(/[^a-zA-Z0-9-_./]/g, '-');
+
+  // Ensure the branch name doesn't start or end with a slash
+  sanitizedName = sanitizedName.replace(/^\/+|\/+$/g, '');
+
+  // If the branch name is empty after sanitization, provide a default
+  if (!sanitizedName) {
+    sanitizedName = `feature/ai-task-${Date.now()}`;
+  }
+
+  return sanitizedName;
+}
+
 export async function ensureBranch(
   basePath: string,
   initialBranchName: string,