diff --git a/editors/vscode/fixtures/nested_mixed_config/.oxlintrc.json b/editors/vscode/fixtures/nested_mixed_config/.oxlintrc.json
new file mode 100644
index 0000000000000..e363f06caf696
--- /dev/null
+++ b/editors/vscode/fixtures/nested_mixed_config/.oxlintrc.json
@@ -0,0 +1,8 @@
+{
+  "categories": {
+    "correctness": "off"
+  },
+  "rules": {
+    "no-debugger": "warn"
+  }
+}
diff --git a/editors/vscode/fixtures/nested_mixed_config/folder/index.ts b/editors/vscode/fixtures/nested_mixed_config/folder/index.ts
new file mode 100644
index 0000000000000..eab74692130a6
--- /dev/null
+++ b/editors/vscode/fixtures/nested_mixed_config/folder/index.ts
@@ -0,0 +1 @@
+debugger;
diff --git a/editors/vscode/fixtures/nested_mixed_config/folder/oxlint.config.ts b/editors/vscode/fixtures/nested_mixed_config/folder/oxlint.config.ts
new file mode 100644
index 0000000000000..9d2ed36fc0b84
--- /dev/null
+++ b/editors/vscode/fixtures/nested_mixed_config/folder/oxlint.config.ts
@@ -0,0 +1,8 @@
+export default {
+  categories: {
+    correctness: "off",
+  },
+  rules: {
+    "no-debugger": "error",
+  },
+};
diff --git a/editors/vscode/fixtures/nested_mixed_config/index.ts b/editors/vscode/fixtures/nested_mixed_config/index.ts
new file mode 100644
index 0000000000000..eab74692130a6
--- /dev/null
+++ b/editors/vscode/fixtures/nested_mixed_config/index.ts
@@ -0,0 +1 @@
+debugger;
diff --git a/editors/vscode/fixtures/nested_ts_config/folder/index.ts b/editors/vscode/fixtures/nested_ts_config/folder/index.ts
new file mode 100644
index 0000000000000..eab74692130a6
--- /dev/null
+++ b/editors/vscode/fixtures/nested_ts_config/folder/index.ts
@@ -0,0 +1 @@
+debugger;
diff --git a/editors/vscode/fixtures/nested_ts_config/folder/oxlint.config.ts b/editors/vscode/fixtures/nested_ts_config/folder/oxlint.config.ts
new file mode 100644
index 0000000000000..9d2ed36fc0b84
--- /dev/null
+++ b/editors/vscode/fixtures/nested_ts_config/folder/oxlint.config.ts
@@ -0,0 +1,8 @@
+export default {
+  categories: {
+    correctness: "off",
+  },
+  rules: {
+    "no-debugger": "error",
+  },
+};
diff --git a/editors/vscode/fixtures/nested_ts_config/index.ts b/editors/vscode/fixtures/nested_ts_config/index.ts
new file mode 100644
index 0000000000000..eab74692130a6
--- /dev/null
+++ b/editors/vscode/fixtures/nested_ts_config/index.ts
@@ -0,0 +1 @@
+debugger;
diff --git a/editors/vscode/fixtures/nested_ts_config/oxlint.config.ts b/editors/vscode/fixtures/nested_ts_config/oxlint.config.ts
new file mode 100644
index 0000000000000..1dd008e335baf
--- /dev/null
+++ b/editors/vscode/fixtures/nested_ts_config/oxlint.config.ts
@@ -0,0 +1,8 @@
+export default {
+  categories: {
+    correctness: "off",
+  },
+  rules: {
+    "no-debugger": "warn",
+  },
+};
diff --git a/editors/vscode/fixtures/ts_config/debugger.js b/editors/vscode/fixtures/ts_config/debugger.js
new file mode 100644
index 0000000000000..d360b2d7a29fa
--- /dev/null
+++ b/editors/vscode/fixtures/ts_config/debugger.js
@@ -0,0 +1 @@
+/* 😊 */debugger;
diff --git a/editors/vscode/fixtures/ts_config/oxlint.config.ts b/editors/vscode/fixtures/ts_config/oxlint.config.ts
new file mode 100644
index 0000000000000..9d2ed36fc0b84
--- /dev/null
+++ b/editors/vscode/fixtures/ts_config/oxlint.config.ts
@@ -0,0 +1,8 @@
+export default {
+  categories: {
+    correctness: "off",
+  },
+  rules: {
+    "no-debugger": "error",
+  },
+};
diff --git a/editors/vscode/tests/integration/e2e_server_linter.spec.ts b/editors/vscode/tests/integration/e2e_server_linter.spec.ts
index 2abe22fc8c7e3..85cb1994ea059 100644
--- a/editors/vscode/tests/integration/e2e_server_linter.spec.ts
+++ b/editors/vscode/tests/integration/e2e_server_linter.spec.ts
@@ -236,6 +236,60 @@ suite("E2E Server Linter", () => {
     strictEqual(nestedDiagnostics[0].severity, DiagnosticSeverity.Error);
   });
 
+  test("oxlint.config.ts TypeScript configuration", async () => {
+    await loadFixture("ts_config");
+    await sleep(500);
+    const diagnostics = await getDiagnostics("debugger.js", undefined, 500);
+
+    strictEqual(diagnostics.length, 1);
+    assert(typeof diagnostics[0].code == "object");
+    strictEqual(diagnostics[0].code.target.authority, "oxc.rs");
+    strictEqual(
+      diagnostics[0].message,
+      "`debugger` statement is not allowed\nhelp: Remove the debugger statement",
+    );
+    strictEqual(diagnostics[0].severity, DiagnosticSeverity.Error);
+    strictEqual(diagnostics[0].range.start.line, 0);
+    strictEqual(diagnostics[0].range.start.character, 8);
+    strictEqual(diagnostics[0].range.end.line, 0);
+    strictEqual(diagnostics[0].range.end.character, 17);
+  });
+
+  test("nested oxlint.config.ts configs severity", async () => {
+    await loadFixture("nested_ts_config");
+    await sleep(500);
+    const rootDiagnostics = await getDiagnostics("index.ts", undefined, 500);
+    const nestedDiagnostics = await getDiagnostics("folder/index.ts", undefined, 500);
+
+    strictEqual(rootDiagnostics.length, 1);
+    assert(typeof rootDiagnostics[0].code == "object");
+    strictEqual(rootDiagnostics[0].code.target.authority, "oxc.rs");
+    strictEqual(rootDiagnostics[0].severity, DiagnosticSeverity.Warning);
+
+    strictEqual(nestedDiagnostics.length, 1);
+    assert(typeof nestedDiagnostics[0].code == "object");
+    strictEqual(nestedDiagnostics[0].code.target.authority, "oxc.rs");
+    strictEqual(nestedDiagnostics[0].severity, DiagnosticSeverity.Error);
+  });
+
+  test("nested mixed JSON and TypeScript configs severity", async () => {
+    await loadFixture("nested_mixed_config");
+    const rootDiagnostics = await getDiagnostics("index.ts", undefined, 500);
+    const nestedDiagnostics = await getDiagnostics("folder/index.ts", undefined, 500);
+
+    // Root uses .oxlintrc.json with warn
+    strictEqual(rootDiagnostics.length, 1);
+    assert(typeof rootDiagnostics[0].code == "object");
+    strictEqual(rootDiagnostics[0].code.target.authority, "oxc.rs");
+    strictEqual(rootDiagnostics[0].severity, DiagnosticSeverity.Warning);
+
+    // Nested folder uses oxlint.config.ts with error
+    strictEqual(nestedDiagnostics.length, 1);
+    assert(typeof nestedDiagnostics[0].code == "object");
+    strictEqual(nestedDiagnostics[0].code.target.authority, "oxc.rs");
+    strictEqual(nestedDiagnostics[0].severity, DiagnosticSeverity.Error);
+  });
+
   testMultiFolderMode("different diagnostic severity", async () => {
     await loadFixture("debugger", WORKSPACE_DIR);
     await loadFixture("debugger_error", WORKSPACE_SECOND_DIR);