From ac4707a731c2254a76754b371f185be6c481a7f9 Mon Sep 17 00:00:00 2001
From: Hidetake Iwata <int128@gmail.com>
Date: Sat, 13 Dec 2025 11:20:05 +0900
Subject: [PATCH] Enable strict type checking

---
 .github/workflows/ts.yaml |  1 +
 biome.json                |  2 +-
 package.json              |  2 ++
 pnpm-lock.yaml            | 10 ++++++++++
 tsconfig.json             |  2 +-
 5 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/ts.yaml b/.github/workflows/ts.yaml
index 278e5f34..d2fc22a5 100644
--- a/.github/workflows/ts.yaml
+++ b/.github/workflows/ts.yaml
@@ -33,6 +33,7 @@ jobs:
       - run: npm install -g pnpm@latest-10
       - run: pnpm i
       - run: pnpm run test
+      - run: pnpm run typecheck
 
   generate:
     runs-on: ubuntu-latest
diff --git a/biome.json b/biome.json
index 7044f762..bf8ecb8a 100644
--- a/biome.json
+++ b/biome.json
@@ -1,5 +1,5 @@
 {
-  "$schema": "https://biomejs.dev/schemas/2.2.6/schema.json",
+  "$schema": "https://biomejs.dev/schemas/2.3.8/schema.json",
   "vcs": {
     "enabled": true,
     "clientKind": "git",
diff --git a/package.json b/package.json
index f36878b0..aaa66d24 100644
--- a/package.json
+++ b/package.json
@@ -2,6 +2,7 @@
   "private": true,
   "scripts": {
     "build": "ncc build --source-map --license licenses.txt src/index.ts",
+    "typecheck": "tsc --noEmit",
     "test": "vitest"
   },
   "type": "module",
@@ -17,6 +18,7 @@
   "devDependencies": {
     "@biomejs/biome": "2.3.8",
     "@tsconfig/node20": "20.1.8",
+    "@tsconfig/strictest": "2.0.8",
     "@types/node": "20.19.25",
     "@vercel/ncc": "0.38.4",
     "pnpm": "10.24.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 8aa1cb53..e3d225d1 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -36,6 +36,9 @@ importers:
       '@tsconfig/node20':
         specifier: 20.1.8
         version: 20.1.8
+      '@tsconfig/strictest':
+        specifier: 2.0.8
+        version: 2.0.8
       '@types/node':
         specifier: 20.19.25
         version: 20.19.25
@@ -547,11 +550,13 @@ packages:
     resolution: {integrity: sha512-wG9e2XtIhd++QugU5MD9i7OnpaVb08ji3P1y/hNbxrQ3sYEelKJOq1UJ5dXczeo6Hj2rfDEL5GdtkMSVLa/AOg==}
     cpu: [loong64]
     os: [linux]
+    libc: [glibc]
 
   '@rollup/rollup-linux-powerpc64le-gnu@4.40.0':
     resolution: {integrity: sha512-vgXfWmj0f3jAUvC7TZSU/m/cOE558ILWDzS7jBhiCAFpY2WEBn5jqgbqvmzlMjtp8KlLcBlXVD2mkTSEQE6Ixw==}
     cpu: [ppc64]
     os: [linux]
+    libc: [glibc]
 
   '@rollup/rollup-linux-riscv64-gnu@4.40.0':
     resolution: {integrity: sha512-uJkYTugqtPZBS3Z136arevt/FsKTF/J9dEMTX/cwR7lsAW4bShzI2R0pJVw+hcBTWF4dxVckYh72Hk3/hWNKvA==}
@@ -599,6 +604,9 @@ packages:
   '@tsconfig/node20@20.1.8':
     resolution: {integrity: sha512-Em+IdPfByIzWRRpqWL4Z7ArLHZGxmc36BxE3jCz9nBFSm+5aLaPMZyjwu4yetvyKXeogWcxik4L1jB5JTWfw7A==}
 
+  '@tsconfig/strictest@2.0.8':
+    resolution: {integrity: sha512-XnQ7vNz5HRN0r88GYf1J9JJjqtZPiHt2woGJOo2dYqyHGGcd6OLGqSlBB6p1j9mpzja6Oe5BoPqWmeDx6X9rLw==}
+
   '@types/chai@5.2.2':
     resolution: {integrity: sha512-8kB30R7Hwqf40JPiKhVzodJs2Qc1ZJ5zuT3uzw5Hq/dhNCl3G3l83jfpdI1e20BP348+fV7VIL/+FxaXkqBmWg==}
 
@@ -1859,6 +1867,8 @@ snapshots:
 
   '@tsconfig/node20@20.1.8': {}
 
+  '@tsconfig/strictest@2.0.8': {}
+
   '@types/chai@5.2.2':
     dependencies:
       '@types/deep-eql': 4.0.2
diff --git a/tsconfig.json b/tsconfig.json
index 92ebc1fd..4022b050 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,4 +1,4 @@
 {
   "$schema": "https://json.schemastore.org/tsconfig",
-  "extends": "@tsconfig/node20/tsconfig.json"
+  "extends": ["@tsconfig/node20/tsconfig.json", "@tsconfig/strictest/tsconfig.json"]
 }