3 files changed, 21 insertions, 0 deletions

diff --git a/subprojects/frontend/types/ImportMeta.d.ts b/subprojects/frontend/types/ImportMeta.d.ts
new file mode 100644
index 00000000..2008e268
--- /dev/null
+++ b/subprojects/frontend/types/ImportMeta.d.ts
@@ -0,0 +1,9 @@
+interface ImportMeta {
+  env: {
+    DEV: boolean;
+    MODE: string;
+    PROD: boolean;
+    VITE_PACKAGE_NAME: string;
+    VITE_PACKAGE_VERSION: string;
+  };
+}
diff --git a/subprojects/frontend/types/grammar.d.ts b/subprojects/frontend/types/grammar.d.ts
new file mode 100644
index 00000000..1480085b
--- /dev/null
+++ b/subprojects/frontend/types/grammar.d.ts
@@ -0,0 +1,5 @@
+declare module '*.grammar' {
+  import type { LRParser } from '@lezer/lr';
+
+  export const parser: LRParser;
+}
diff --git a/subprojects/frontend/types/node/@lezer-generator-rollup.d.ts b/subprojects/frontend/types/node/@lezer-generator-rollup.d.ts
new file mode 100644
index 00000000..dea39ec9
--- /dev/null
+++ b/subprojects/frontend/types/node/@lezer-generator-rollup.d.ts
@@ -0,0 +1,7 @@
+// We have to explicitly redeclare the type of the `./rollup` ESM export of `@lezer/generator`,
+// because TypeScript can't find it on its own even with `"moduleResolution": "Node16"`.
+declare module '@lezer/generator/rollup' {
+  import type { Plugin } from 'rollup';
+
+  export function lezer(): Plugin;
+}