Mu-L · pull · Dec 26, 2025 · Dec 26, 2025 · Dec 26, 2025 · Dec 26, 2025
diff --git a/development_docs/adding_backend_and_mcp_tools.md b/development_docs/adding_backend_and_mcp_tools.md
@@ -64,7 +64,7 @@ Implement your tool class in the same file:
 
 ---
 ```python
-# Copyright 2025 Marimo. All rights reserved.
+# Copyright 2026 Marimo. All rights reserved.
 from __future__ import annotations
 
 from dataclasses import dataclass, field

diff --git a/development_docs/adding_lint_rules.md b/development_docs/adding_lint_rules.md
@@ -49,7 +49,7 @@ Create your rule in the appropriate directory:
 **Template for a new rule**:
 
 ```python
-# Copyright 2025 Marimo. All rights reserved.
+# Copyright 2026 Marimo. All rights reserved.
 from __future__ import annotations
 
 from typing import TYPE_CHECKING

diff --git a/examples/ui/image_comparison_demo.py b/examples/ui/image_comparison_demo.py
@@ -5,7 +5,7 @@
 #     "marimo",
 # ]
 # ///
-# Copyright 2024 Marimo. All rights reserved.
+# Copyright 2026 Marimo. All rights reserved.
 
 import marimo
 

diff --git a/frontend/.eslintrc.cjs b/frontend/.eslintrc.cjs
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 /**
  * @type {import('eslint').Linter.Config}
  */
@@ -44,7 +44,7 @@ module.exports = {
     "header/header": [
       "error",
       "block",
-      " Copyright 2024 Marimo. All rights reserved. ",
+      " Copyright 2026 Marimo. All rights reserved. ",
     ],
 
     // Rules disabled because they have Biome equivalents

diff --git a/frontend/e2e-tests/badButton.spec.ts b/frontend/e2e-tests/badButton.spec.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 import { expect, test } from "@playwright/test";
 import { getAppUrl } from "../playwright.config";
 

diff --git a/frontend/e2e-tests/bugs.spec.ts b/frontend/e2e-tests/bugs.spec.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 import { expect, test } from "@playwright/test";
 import { getAppUrl } from "../playwright.config";
 import { createCellBelow, maybeRestartKernel, runCell } from "./helper";

diff --git a/frontend/e2e-tests/cells.spec.ts b/frontend/e2e-tests/cells.spec.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 import { expect, test } from "@playwright/test";
 import { getAppUrl, resetFile } from "../playwright.config";
 import {

diff --git a/frontend/e2e-tests/components.spec.ts b/frontend/e2e-tests/components.spec.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { fileURLToPath } from "node:url";
 import { expect, type Page, test } from "@playwright/test";

diff --git a/frontend/e2e-tests/disabled.spec.ts b/frontend/e2e-tests/disabled.spec.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { fileURLToPath } from "node:url";
 import { expect, test } from "@playwright/test";

diff --git a/frontend/e2e-tests/global-setup.ts b/frontend/e2e-tests/global-setup.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { chromium, type FullConfig } from "@playwright/test";
 import { type ApplicationNames, getAppUrl } from "../playwright.config";

diff --git a/frontend/e2e-tests/global-teardown.ts b/frontend/e2e-tests/global-teardown.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 /** biome-ignore-all lint/suspicious/noConsole: for debugging */
 
 import { exec } from "node:child_process";

diff --git a/frontend/e2e-tests/helper.ts b/frontend/e2e-tests/helper.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import path from "node:path";
 import { expect, type Locator, type Page } from "@playwright/test";

diff --git a/frontend/e2e-tests/kitchen-sink-wasm.spec.ts b/frontend/e2e-tests/kitchen-sink-wasm.spec.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { fileURLToPath } from "node:url";
 import { expect, test } from "@playwright/test";

diff --git a/frontend/e2e-tests/kitchen-sink.spec.ts b/frontend/e2e-tests/kitchen-sink.spec.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { fileURLToPath } from "node:url";
 import { test } from "@playwright/test";

diff --git a/frontend/e2e-tests/layout-grid-with-sidebar.spec.ts b/frontend/e2e-tests/layout-grid-with-sidebar.spec.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { fileURLToPath } from "node:url";
 import { expect, test } from "@playwright/test";

diff --git a/frontend/e2e-tests/layout-grid.spec.ts b/frontend/e2e-tests/layout-grid.spec.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { fileURLToPath } from "node:url";
 import { expect, type Page, test } from "@playwright/test";

diff --git a/frontend/e2e-tests/mode.spec.ts b/frontend/e2e-tests/mode.spec.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { fileURLToPath } from "node:url";
 import { type BrowserContext, expect, type Page, test } from "@playwright/test";

diff --git a/frontend/e2e-tests/output.spec.ts b/frontend/e2e-tests/output.spec.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { fileURLToPath } from "node:url";
 import { expect, test } from "@playwright/test";

diff --git a/frontend/e2e-tests/shutdown.spec.ts b/frontend/e2e-tests/shutdown.spec.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { fileURLToPath } from "node:url";
 import { expect, test } from "@playwright/test";

diff --git a/frontend/e2e-tests/stdin.spec.ts b/frontend/e2e-tests/stdin.spec.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 import { expect, test } from "@playwright/test";
 import { getAppUrl } from "../playwright.config";
 

diff --git a/frontend/e2e-tests/streams.spec.ts b/frontend/e2e-tests/streams.spec.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 import { expect, test } from "@playwright/test";
 import { getAppUrl } from "../playwright.config";
 

diff --git a/frontend/e2e-tests/test-utils.ts b/frontend/e2e-tests/test-utils.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import type { Locator, Page } from "@playwright/test";
 

diff --git a/frontend/e2e-tests/toggle-cell-language.spec.ts b/frontend/e2e-tests/toggle-cell-language.spec.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 import { expect, test } from "@playwright/test";
 import { getAppUrl, resetFile } from "../playwright.config";
 import { openCellActions } from "./helper";

diff --git a/frontend/islands/vite.config.mts b/frontend/islands/vite.config.mts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import fs from "node:fs";
 import path from "node:path";

diff --git a/frontend/playwright.config.ts b/frontend/playwright.config.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { exec } from "node:child_process";
 import path from "node:path";

diff --git a/frontend/postcss.config.cjs b/frontend/postcss.config.cjs
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 const config = {
   plugins: [
     require("@tailwindcss/postcss"),

diff --git a/frontend/public/files/wasm-intro.py b/frontend/public/files/wasm-intro.py
@@ -1,4 +1,4 @@
-# Copyright 2024 Marimo. All rights reserved.
+# Copyright 2026 Marimo. All rights reserved.
 
 import marimo
 

diff --git a/frontend/src/__mocks__/common.ts b/frontend/src/__mocks__/common.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 /** biome-ignore-all lint/suspicious/noConsole: for debugging */
 import { type Mock, vi } from "vitest";
 import { invariant } from "@/utils/invariant";

diff --git a/frontend/src/__mocks__/notebook.ts b/frontend/src/__mocks__/notebook.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { createRef } from "react";
 import { vi } from "vitest";

diff --git a/frontend/src/__mocks__/requests.ts b/frontend/src/__mocks__/requests.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { type Mock, vi } from "vitest";
 import type { EditRequests, RunRequests } from "@/core/network/types";

diff --git a/frontend/src/__mocks__/tracebacks.ts b/frontend/src/__mocks__/tracebacks.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 // from:
 // def foo():

diff --git a/frontend/src/__tests__/CellStatus.test.tsx b/frontend/src/__tests__/CellStatus.test.tsx
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { render } from "@testing-library/react";
 import { afterEach, beforeEach, describe, expect, test, vi } from "vitest";

diff --git a/frontend/src/__tests__/chat-history.test.ts b/frontend/src/__tests__/chat-history.test.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { afterAll, beforeAll, describe, expect, it } from "vitest";
 import { groupChatsByDate } from "../components/chat/chat-history-utils";

diff --git a/frontend/src/__tests__/chat-utils.test.ts b/frontend/src/__tests__/chat-utils.test.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import type { UIMessage } from "ai";
 import { describe, expect, it } from "vitest";

diff --git a/frontend/src/__tests__/main.test.tsx b/frontend/src/__tests__/main.test.tsx
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 // @vitest-environment jsdom
 
 import { beforeEach, describe, expect, it, vi } from "vitest";

diff --git a/frontend/src/__tests__/mocks.ts b/frontend/src/__tests__/mocks.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 // Edge case filenames for testing unicode, spaces, and special characters
 export const EDGE_CASE_FILENAMES = [

diff --git a/frontend/src/__tests__/setup.ts b/frontend/src/__tests__/setup.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { cleanup } from "@testing-library/react";
 import { afterEach, beforeEach, vi } from "vitest";

diff --git a/frontend/src/__tests__/test-helpers.ts b/frontend/src/__tests__/test-helpers.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 /**
  * Common test patterns

diff --git a/frontend/src/components/ai/ai-model-dropdown.tsx b/frontend/src/components/ai/ai-model-dropdown.tsx
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import type { Role } from "@marimo-team/llm-info";
 import { useAtomValue } from "jotai";

diff --git a/frontend/src/components/ai/ai-provider-icon.tsx b/frontend/src/components/ai/ai-provider-icon.tsx
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import AnthropicIcon from "@marimo-team/llm-info/icons/anthropic.svg?inline";
 import BedrockIcon from "@marimo-team/llm-info/icons/aws.svg?inline";

diff --git a/frontend/src/components/ai/display-helpers.tsx b/frontend/src/components/ai/display-helpers.tsx
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import type { Role } from "@marimo-team/llm-info";
 

diff --git a/frontend/src/components/app-config/ai-config.tsx b/frontend/src/components/app-config/ai-config.tsx
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import {
   BotIcon,

diff --git a/frontend/src/components/app-config/app-config-button.tsx b/frontend/src/components/app-config/app-config-button.tsx
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { useAtom } from "jotai";
 import { SettingsIcon } from "lucide-react";

diff --git a/frontend/src/components/app-config/app-config-form.tsx b/frontend/src/components/app-config/app-config-form.tsx
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 import { zodResolver } from "@hookform/resolvers/zod";
 import { useEffect, useId } from "react";
 import { useForm } from "react-hook-form";

diff --git a/frontend/src/components/app-config/common.tsx b/frontend/src/components/app-config/common.tsx
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import type { HTMLProps, PropsWithChildren } from "react";
 import type { SqlOutputType } from "@/core/config/config-schema";

diff --git a/frontend/src/components/app-config/constants.ts b/frontend/src/components/app-config/constants.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 /**
  * AWS regions where the Bedrock service is available

diff --git a/frontend/src/components/app-config/data-form.tsx b/frontend/src/components/app-config/data-form.tsx
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import type { ChangeEvent } from "react";
 import type { FieldPath, UseFormReturn } from "react-hook-form";

diff --git a/frontend/src/components/app-config/incorrect-model-id.tsx b/frontend/src/components/app-config/incorrect-model-id.tsx
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 import React from "react";
 import { AiModelId, type QualifiedModelId } from "@/core/ai/ids/ids";
 import { Banner } from "@/plugins/impl/common/error-banner";

diff --git a/frontend/src/components/app-config/is-overridden.tsx b/frontend/src/components/app-config/is-overridden.tsx
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { useAtomValue } from "jotai";
 import { get } from "lodash-es";

diff --git a/frontend/src/components/app-config/mcp-config.tsx b/frontend/src/components/app-config/mcp-config.tsx
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { CheckSquareIcon, Loader2, RefreshCwIcon } from "lucide-react";
 import React from "react";

diff --git a/frontend/src/components/app-config/optional-features.tsx b/frontend/src/components/app-config/optional-features.tsx
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { BoxIcon, CheckCircleIcon, XCircleIcon } from "lucide-react";
 import React from "react";

diff --git a/frontend/src/components/app-config/state.ts b/frontend/src/components/app-config/state.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 import { atom, useSetAtom } from "jotai";
 import {
   activeUserConfigCategoryAtom,

diff --git a/frontend/src/components/app-config/user-config-form.tsx b/frontend/src/components/app-config/user-config-form.tsx
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { zodResolver } from "@hookform/resolvers/zod";
 import { atom, useAtom, useAtomValue, useSetAtom } from "jotai";

diff --git a/frontend/src/components/audio/audio-recorder.tsx b/frontend/src/components/audio/audio-recorder.tsx
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { CircleIcon, SquareIcon } from "lucide-react";
 import React from "react";

diff --git a/frontend/src/components/buttons/clear-button.tsx b/frontend/src/components/buttons/clear-button.tsx
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { cn } from "@/utils/cn";
 

diff --git a/frontend/src/components/buttons/undo-button.tsx b/frontend/src/components/buttons/undo-button.tsx
@@ -1,9 +1,9 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 import { useEventListener } from "@/hooks/useEventListener";
 import { MinimalHotkeys } from "../shortcuts/renderShortcut";
 import { Button, type ButtonProps } from "../ui/button";
 
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 interface UndoButtonProps extends Omit<ButtonProps, "onClick"> {
   onClick?: (event: Pick<Event, "preventDefault" | "stopPropagation">) => void;
 }

diff --git a/frontend/src/components/charts/lazy.tsx b/frontend/src/components/charts/lazy.tsx
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import React from "react";
 

diff --git a/frontend/src/components/charts/tooltip.ts b/frontend/src/components/charts/tooltip.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 import { Handler } from "vega-tooltip";
 
 // Create a tooltip handler that supports HTML content (including images)

diff --git a/frontend/src/components/charts/types.ts b/frontend/src/components/charts/types.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import type { SignalListenerHandler } from "vega-typings";
 

diff --git a/frontend/src/components/chat/acp/__tests__/atoms.test.ts b/frontend/src/components/chat/acp/__tests__/atoms.test.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { createStore } from "jotai";
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";

diff --git a/frontend/src/components/chat/acp/__tests__/context-utils.test.ts b/frontend/src/components/chat/acp/__tests__/context-utils.test.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { beforeEach, describe, expect, it, type Mocked, vi } from "vitest";
 import {

diff --git a/frontend/src/components/chat/acp/__tests__/prompt.test.ts b/frontend/src/components/chat/acp/__tests__/prompt.test.ts
@@ -1,4 +1,4 @@
-/* Copyright 2024 Marimo. All rights reserved. */
+/* Copyright 2026 Marimo. All rights reserved. */
 
 import { describe, expect, it } from "vitest";
 import { getAgentPrompt } from "../prompt";