diff --git a/.gitignore b/.gitignore
index f860c867..b7ecfe95 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,9 @@ docs/api/
 docs/.vitepress/cache/
 docs/.vitepress/dist/
 
+# Claude Code agent worktrees, each a full checkout of the repo
+.claude/worktrees/
+
 #### joe made this: http://goel.io/joe
 
 #####=== Archives ===#####
diff --git a/eslint.config.mjs b/eslint.config.mjs
index bc6c13a1..c8b6386a 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -11,7 +11,8 @@ export default tseslint.config(
       '**/node_modules/**',
       '**/coverage/**',
       'docs/api/**',
-      'docs/.vitepress/cache/**'
+      'docs/.vitepress/cache/**',
+      '.claude/worktrees/**'
     ]
   },
   eslint.configs.recommended,
diff --git a/jest.config.ts b/jest.config.ts
index 9a7de494..22144a42 100644
--- a/jest.config.ts
+++ b/jest.config.ts
@@ -17,7 +17,14 @@ const config: Config = {
   testEnvironment: 'node',
   // Generated files import with a .js extension, which resolves to the .ts source
   moduleNameMapper: { '^(\\.{1,2}/.*)\\.js$': '$1' },
-  testPathIgnorePatterns: ['node_modules/', 'dist/', '<rootDir>/docs/'],
+  // Agent worktrees in .claude/worktrees hold copies of every package
+  modulePathIgnorePatterns: ['<rootDir>/.claude/'],
+  testPathIgnorePatterns: [
+    'node_modules/',
+    'dist/',
+    '<rootDir>/docs/',
+    '<rootDir>/.claude/'
+  ],
   transform: {
     '^.+\\.tsx?$': [
       'ts-jest',