diff --git a/qt/aqt/data/web/js/toolbar.ts b/qt/aqt/data/web/js/toolbar.ts
index d7c2aa6c0..abc4e1e1c 100644
--- a/qt/aqt/data/web/js/toolbar.ts
+++ b/qt/aqt/data/web/js/toolbar.ts
@@ -1,3 +1,6 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
 enum SyncState {
     NoChanges = 0,
     Normal,
diff --git a/scripts/copyright_headers.py b/scripts/copyright_headers.py
index 570775362..344d9d19c 100644
--- a/scripts/copyright_headers.py
+++ b/scripts/copyright_headers.py
@@ -14,6 +14,12 @@ nonstandard_header = {
     "qt/aqt/winpaths.py",
 }
 
+ignored_folders = [
+    "bazel-",
+    "qt/forms",
+    "ts/node_modules",
+]
+
 if not os.path.exists("WORKSPACE"):
     print("run from workspace root")
     sys.exit(1)
@@ -21,22 +27,30 @@ if not os.path.exists("WORKSPACE"):
 found = False
 for dirpath, dirnames, fnames in os.walk("."):
     dir = Path(dirpath)
-    if "bazel-" in dirpath:
-        continue
-    if "qt/forms" in dirpath:
+
+    ignore = False
+    for folder in ignored_folders:
+        if folder in dirpath:
+            ignore = True
+            break
+    if ignore:
         continue
+
     for fname in fnames:
-        if fname.endswith(".py"):
-            path = dir / fname
-            with open(path) as f:
-                top = f.read(256)
-                if not top.strip():
-                    continue
-                if str(path) in nonstandard_header:
-                    continue
-                if "Ankitects Pty Ltd and contributors" not in top:
-                    print("missing standard copyright header:", path)
-                    found = True
+        for ext in ".py", ".ts":
+            if fname.endswith(ext):
+                path = dir / fname
+                with open(path) as f:
+                    top = f.read(256)
+                    if not top.strip():
+                        continue
+                    if str(path) in nonstandard_header:
+                        continue
+                    if fname.endswith(".d.ts"):
+                        continue
+                    if "Ankitects Pty Ltd and contributors" not in top:
+                        print("missing standard copyright header:", path)
+                        found = True
 
 if found:
     sys.exit(1)
\ No newline at end of file
diff --git a/ts/editor/changeTimer.ts b/ts/editor/changeTimer.ts
index fc7c22bbe..30e442e5d 100644
--- a/ts/editor/changeTimer.ts
+++ b/ts/editor/changeTimer.ts
@@ -1,5 +1,5 @@
-/* Copyright: Ankitects Pty Ltd and contributors
- * License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
 import type { EditingArea } from "./editingArea";
 
diff --git a/ts/editor/editable.ts b/ts/editor/editable.ts
index 69eec5624..b67a21b49 100644
--- a/ts/editor/editable.ts
+++ b/ts/editor/editable.ts
@@ -1,3 +1,6 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
 import { nodeIsInline } from "./helpers";
 
 function containsInlineContent(field: Element): boolean {
diff --git a/ts/editor/editingArea.ts b/ts/editor/editingArea.ts
index 6b7d7c4af..737493f6b 100644
--- a/ts/editor/editingArea.ts
+++ b/ts/editor/editingArea.ts
@@ -1,3 +1,6 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
 import type { Editable } from "./editable";
 
 import { bridgeCommand } from "./lib";
diff --git a/ts/editor/editorField.ts b/ts/editor/editorField.ts
index eb0b3005e..789af8d3d 100644
--- a/ts/editor/editorField.ts
+++ b/ts/editor/editorField.ts
@@ -1,3 +1,6 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
 import type { EditingArea } from "./editingArea";
 import type { LabelContainer } from "./labelContainer";
 
diff --git a/ts/editor/focusHandlers.ts b/ts/editor/focusHandlers.ts
index ec676f6db..6ca0528dd 100644
--- a/ts/editor/focusHandlers.ts
+++ b/ts/editor/focusHandlers.ts
@@ -1,5 +1,5 @@
-/* Copyright: Ankitects Pty Ltd and contributors
- * License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
 import type { EditingArea } from "./editingArea";
 
diff --git a/ts/editor/helpers.ts b/ts/editor/helpers.ts
index 9281af818..bfed2ed7a 100644
--- a/ts/editor/helpers.ts
+++ b/ts/editor/helpers.ts
@@ -1,5 +1,5 @@
-/* Copyright: Ankitects Pty Ltd and contributors
- * License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
 import type { EditingArea } from "./editingArea";
 
diff --git a/ts/editor/index.ts b/ts/editor/index.ts
index acb18994f..44101244d 100644
--- a/ts/editor/index.ts
+++ b/ts/editor/index.ts
@@ -1,5 +1,5 @@
-/* Copyright: Ankitects Pty Ltd and contributors
- * License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
 import { filterHTML } from "html-filter";
 
diff --git a/ts/editor/index_wrapper.ts b/ts/editor/index_wrapper.ts
index a2b98fa16..13b2ec606 100644
--- a/ts/editor/index_wrapper.ts
+++ b/ts/editor/index_wrapper.ts
@@ -1,3 +1,6 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
 // extend the global namespace with our exports - not sure if there's a better way with esbuild
 import * as globals from "./index";
 for (const key in globals) {
diff --git a/ts/editor/inputHandlers.ts b/ts/editor/inputHandlers.ts
index 8a4d5b28b..afb38bf0f 100644
--- a/ts/editor/inputHandlers.ts
+++ b/ts/editor/inputHandlers.ts
@@ -1,5 +1,5 @@
-/* Copyright: Ankitects Pty Ltd and contributors
- * License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
 import { EditingArea } from "./editingArea";
 import { caretToEnd, nodeIsElement } from "./helpers";
diff --git a/ts/editor/labelContainer.ts b/ts/editor/labelContainer.ts
index 41b205048..7f9b2a02e 100644
--- a/ts/editor/labelContainer.ts
+++ b/ts/editor/labelContainer.ts
@@ -1,3 +1,6 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
 import { bridgeCommand } from "./lib";
 import pinIcon from "./pin-angle.svg";
 
diff --git a/ts/editor/lib.ts b/ts/editor/lib.ts
index 63a9b0324..49c2e0961 100644
--- a/ts/editor/lib.ts
+++ b/ts/editor/lib.ts
@@ -1,5 +1,5 @@
-/* Copyright: Ankitects Pty Ltd and contributors
- * License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
 declare global {
     interface Window {
diff --git a/ts/editor/noteId.ts b/ts/editor/noteId.ts
index 649db8d5e..fc10d7a99 100644
--- a/ts/editor/noteId.ts
+++ b/ts/editor/noteId.ts
@@ -1,5 +1,5 @@
-/* Copyright: Ankitects Pty Ltd and contributors
- * License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
 let currentNoteId: number | null = null;
 
diff --git a/ts/editor/toolbar.ts b/ts/editor/toolbar.ts
index a4d87819b..1e6cdb274 100644
--- a/ts/editor/toolbar.ts
+++ b/ts/editor/toolbar.ts
@@ -1,5 +1,5 @@
-/* Copyright: Ankitects Pty Ltd and contributors
- * License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
 const highlightButtons = ["bold", "italic", "underline", "superscript", "subscript"];
 
diff --git a/ts/editor/wrap.ts b/ts/editor/wrap.ts
index 3c45b731c..c96fc7f8d 100644
--- a/ts/editor/wrap.ts
+++ b/ts/editor/wrap.ts
@@ -1,5 +1,5 @@
-/* Copyright: Ankitects Pty Ltd and contributors
- * License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
 import { getCurrentField, setFormat } from ".";
 
diff --git a/ts/graphs/preferences.ts b/ts/graphs/preferences.ts
index 5dad878a2..5ac11a394 100644
--- a/ts/graphs/preferences.ts
+++ b/ts/graphs/preferences.ts
@@ -1,3 +1,7 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+// languageServerHost taken from MIT sources - see below.
+
 import pb from "anki/backend_proto";
 import { getGraphPreferences, setGraphPreferences } from "./graph-helpers";
 import { Writable, writable, get } from "svelte/store";
diff --git a/ts/html-filter/element.ts b/ts/html-filter/element.ts
index 4ef495f2f..0e68bf5a2 100644
--- a/ts/html-filter/element.ts
+++ b/ts/html-filter/element.ts
@@ -1,3 +1,6 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
 import { isHTMLElement, isNightMode } from "./helpers";
 import { removeNode as removeElement } from "./node";
 import {
diff --git a/ts/html-filter/helpers.ts b/ts/html-filter/helpers.ts
index 7945d8942..eed5a492a 100644
--- a/ts/html-filter/helpers.ts
+++ b/ts/html-filter/helpers.ts
@@ -1,3 +1,6 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
 export function isHTMLElement(elem: Element): elem is HTMLElement {
     return elem instanceof HTMLElement;
 }
diff --git a/ts/html-filter/index.test.ts b/ts/html-filter/index.test.ts
index 3e881845d..35d33bb3b 100644
--- a/ts/html-filter/index.test.ts
+++ b/ts/html-filter/index.test.ts
@@ -1,3 +1,6 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
 test("it should work", () => {
     expect("test").toBe("test");
 });
diff --git a/ts/html-filter/index.ts b/ts/html-filter/index.ts
index cec3835e2..f3ef0df31 100644
--- a/ts/html-filter/index.ts
+++ b/ts/html-filter/index.ts
@@ -1,5 +1,5 @@
-/* Copyright: Ankitects Pty Ltd and contributors
- * License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html */
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
 import {
     filterElementBasic,
diff --git a/ts/html-filter/node.ts b/ts/html-filter/node.ts
index 735e52fff..dccbe896c 100644
--- a/ts/html-filter/node.ts
+++ b/ts/html-filter/node.ts
@@ -1,3 +1,6 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
 export function removeNode(element: Node): void {
     element.parentNode?.removeChild(element);
 }
diff --git a/ts/html-filter/styling.ts b/ts/html-filter/styling.ts
index 4295f5015..6896268a5 100644
--- a/ts/html-filter/styling.ts
+++ b/ts/html-filter/styling.ts
@@ -1,3 +1,6 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
 interface AllowPropertiesBlockValues {
     [property: string]: string[];
 }
diff --git a/ts/lib/time.test.ts b/ts/lib/time.test.ts
index 64a86b9de..a17d8266c 100644
--- a/ts/lib/time.test.ts
+++ b/ts/lib/time.test.ts
@@ -1,3 +1,6 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
 import { naturalUnit, naturalWholeUnit, TimespanUnit } from "./time";
 
 test("natural unit", () => {
diff --git a/ts/lib/typing.ts b/ts/lib/typing.ts
index e9cd02a0b..205930ff3 100644
--- a/ts/lib/typing.ts
+++ b/ts/lib/typing.ts
@@ -1,3 +1,6 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
 export function assertUnreachable(x: never): never {
     throw new Error(`unreachable: ${x}`);
 }
diff --git a/ts/sql_format.ts b/ts/sql_format.ts
index 56722eeda..fc5beedfa 100644
--- a/ts/sql_format.ts
+++ b/ts/sql_format.ts
@@ -1,3 +1,6 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
 import sqlFormatter from "@sqltools/formatter";
 import * as Diff from "diff";
 import process from "process";
diff --git a/ts/svelte/svelte.ts b/ts/svelte/svelte.ts
index a50023ffb..d1fdf3bde 100644
--- a/ts/svelte/svelte.ts
+++ b/ts/svelte/svelte.ts
@@ -1,3 +1,7 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+// languageServerHost taken from MIT sources - see below.
+
 const fs = require("fs");
 const worker = require("@bazel/worker");
 const svelte2tsx = require("svelte2tsx");
diff --git a/ts/sveltelib/async.ts b/ts/sveltelib/async.ts
index c6af59cc8..bed798520 100644
--- a/ts/sveltelib/async.ts
+++ b/ts/sveltelib/async.ts
@@ -1,3 +1,6 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
 import { Readable, readable } from "svelte/store";
 
 interface AsyncData<T, E> {
diff --git a/ts/sveltelib/asyncReactive.ts b/ts/sveltelib/asyncReactive.ts
index 0b0aced12..80d75ee40 100644
--- a/ts/sveltelib/asyncReactive.ts
+++ b/ts/sveltelib/asyncReactive.ts
@@ -1,3 +1,6 @@
+// Copyright: Ankitects Pty Ltd and contributors
+// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
 import { Readable, derived } from "svelte/store";
 
 interface AsyncReativeData<T, E> {