diff --git a/package.json b/package.json
index 2601c4fc29..9a6767b735 100644
--- a/package.json
+++ b/package.json
@@ -28,9 +28,9 @@
 		"build": "pnpm build-pre && pnpm -r build && pnpm build-assets",
 		"build-storybook": "pnpm --filter frontend build-storybook",
 		"build-misskey-js-with-types": "pnpm build-pre && pnpm --filter backend... --filter=!misskey-js build && pnpm --filter backend generate-api-json --no-build && ncp packages/backend/built/api.json packages/misskey-js/generator/api.json && pnpm --filter misskey-js update-autogen-code && pnpm --filter misskey-js build && pnpm --filter misskey-js api",
-		"start": "cd packages/backend && pnpm compile-config && node ./built/boot/entry.js",
-		"start:inspect": "cd packages/backend && pnpm compile-config && node --inspect ./built/boot/entry.js",
-		"start:test": "ncp ./.github/misskey/test.yml ./.config/test.yml && cd packages/backend && cross-env NODE_ENV=test pnpm compile-config && cross-env NODE_ENV=test node ./built/boot/entry.js",
+		"start": "cd packages/backend && pnpm compile-config && node ./built/entry.js",
+		"start:inspect": "cd packages/backend && pnpm compile-config && node --inspect ./built/entry.js",
+		"start:test": "ncp ./.github/misskey/test.yml ./.config/test.yml && cd packages/backend && cross-env NODE_ENV=test pnpm compile-config && cross-env NODE_ENV=test node ./built/entry.js",
 		"cli": "cd packages/backend && pnpm cli",
 		"init": "pnpm migrate",
 		"migrate": "cd packages/backend && pnpm migrate",
diff --git a/packages/backend/ormconfig.js b/packages/backend/ormconfig.js
index 1a8c146451..dabc0893f4 100644
--- a/packages/backend/ormconfig.js
+++ b/packages/backend/ormconfig.js
@@ -1,6 +1,6 @@
 import { DataSource } from 'typeorm';
-import { loadConfig } from './src-js/config.js';
-import { entities } from './src-js/postgres.js';
+import { loadConfig } from './built/config.js';
+import { entities } from './built/postgres.js';
 
 const isConcurrentIndexMigrationEnabled = process.env.MISSKEY_MIGRATION_CREATE_INDEX_CONCURRENTLY === '1';
 
diff --git a/packages/backend/package.json b/packages/backend/package.json
index 8bda4bd909..85cd8a0b98 100644
--- a/packages/backend/package.json
+++ b/packages/backend/package.json
@@ -7,15 +7,15 @@
 		"node": "^22.15.0 || ^24.10.0"
 	},
 	"scripts": {
-		"start": "pnpm compile-config && node ./built/boot/entry.js",
-		"start:inspect": "pnpm compile-config && node --inspect ./built/boot/entry.js",
-		"start:test": "cross-env NODE_ENV=test pnpm compile-config && cross-env NODE_ENV=test node ./built/boot/entry.js",
+		"start": "pnpm compile-config && node ./built/entry.js",
+		"start:inspect": "pnpm compile-config && node --inspect ./built/entry.js",
+		"start:test": "cross-env NODE_ENV=test pnpm compile-config && cross-env NODE_ENV=test node ./built/entry.js",
 		"migrate": "pnpm compile-config && pnpm typeorm migration:run -d ormconfig.js",
 		"revert": "pnpm compile-config && pnpm typeorm migration:revert -d ormconfig.js",
-		"cli": "pnpm compile-config && node ./src-js/boot/cli.js",
+		"cli": "pnpm compile-config && node ./built/cli.js",
 		"check:connect": "pnpm compile-config && node ./scripts/check_connect.js",
 		"compile-config": "node ./scripts/compile_config.js",
-		"build": "swc src -d src-js -D --strip-leading-paths && node ./build.js",
+		"build": "swc src -d src-js -D --strip-leading-paths && rolldown -c",
 		"build:test": "swc test-server -d built-test -D --config-file test-server/.swcrc --strip-leading-paths",
 		"watch:swc": "swc src -d built -D -w --strip-leading-paths",
 		"build:tsc": "tsgo -p tsconfig.json && tsc-alias -p tsconfig.json",
@@ -181,6 +181,7 @@
 		"@jest/globals": "29.7.0",
 		"@kitajs/ts-html-plugin": "4.1.3",
 		"@nestjs/platform-express": "11.1.10",
+		"@rollup/plugin-esm-shim": "0.1.8",
 		"@sentry/vue": "10.32.1",
 		"@simplewebauthn/types": "12.0.0",
 		"@swc/jest": "0.2.39",
@@ -219,7 +220,6 @@
 		"aws-sdk-client-mock": "4.1.0",
 		"cbor": "10.0.11",
 		"cross-env": "10.1.0",
-		"esbuild-plugin-swc": "1.0.1",
 		"eslint-plugin-import": "2.32.0",
 		"execa": "9.6.1",
 		"fkill": "10.0.1",
@@ -228,6 +228,7 @@
 		"js-yaml": "4.1.1",
 		"nodemon": "3.1.11",
 		"pid-port": "2.0.0",
+		"rolldown": "1.0.0-beta.58",
 		"simple-oauth2": "5.1.0",
 		"supertest": "7.1.4",
 		"vite": "7.3.0"
diff --git a/packages/backend/rolldown.config.ts b/packages/backend/rolldown.config.ts
new file mode 100644
index 0000000000..38523d5b77
--- /dev/null
+++ b/packages/backend/rolldown.config.ts
@@ -0,0 +1,44 @@
+import { defineConfig } from 'rolldown';
+import esmShim from '@rollup/plugin-esm-shim';
+
+export default defineConfig([{
+	input: [
+		'./src/boot/entry.ts',
+		'./src/boot/cli.ts',
+		'./src/config.ts',
+		'./src/postgres.ts',
+		'./src/server/api/openapi/gen-spec.ts',
+	],
+	platform: 'node',
+	tsconfig: true,
+	plugins: [
+		esmShim(),
+	],
+	output: {
+		keepNames: true,
+		minify: true,
+		sourcemap: true,
+		dir: './built',
+		cleanDir: true,
+		format: 'esm',
+	},
+	external: [
+		/^slacc-.*/,
+		'class-transformer',
+		'class-validator',
+		/^@sentry\/.*/,
+		/^@sentry-internal\/.*/,
+		'@nestjs/websockets/socket-module',
+		'@nestjs/microservices/microservices-module',
+		'@nestjs/microservices',
+		/^@napi-rs\/.*/,
+		'mock-aws-s3',
+		'aws-sdk',
+		'nock',
+		'sharp',
+		'jsdom',
+		're2',
+		'ipaddr.js',
+		'oauth2orize',
+	],
+}]);
diff --git a/packages/backend/scripts/check_connect.js b/packages/backend/scripts/check_connect.js
index d2f38aedb3..bf52536961 100644
--- a/packages/backend/scripts/check_connect.js
+++ b/packages/backend/scripts/check_connect.js
@@ -4,8 +4,8 @@
  */
 
 import Redis from 'ioredis';
-import { loadConfig } from '../src-js/config.js';
-import { createPostgresDataSource } from '../src-js/postgres.js';
+import { loadConfig } from '../built/config.js';
+import { createPostgresDataSource } from '../built/postgres.js';
 
 const config = loadConfig();
 
diff --git a/packages/backend/scripts/dev.mjs b/packages/backend/scripts/dev.mjs
index db96eaf976..78ea9aa3db 100644
--- a/packages/backend/scripts/dev.mjs
+++ b/packages/backend/scripts/dev.mjs
@@ -19,7 +19,7 @@ async function execBuildAssets() {
 function execStart() {
 	// pnpm run start を呼び出したいが、windowsだとプロセスグループ単位でのkillが出来ずゾンビプロセス化するので
 	// 上記と同等の動きをするコマンドで子・孫プロセスを作らないようにしたい
-	backendProcess = execaNode('./built/boot/entry.js', [], {
+	backendProcess = execaNode('./built/entry.js', [], {
 		stdout: process.stdout,
 		stderr: process.stderr,
 		env: {
diff --git a/packages/backend/scripts/generate_api_json.js b/packages/backend/scripts/generate_api_json.js
index 237f63a4d3..8a7e0b062d 100644
--- a/packages/backend/scripts/generate_api_json.js
+++ b/packages/backend/scripts/generate_api_json.js
@@ -19,10 +19,10 @@ async function main() {
 	}
 
 	/** @type {import('../src/config.js')} */
-	const { loadConfig } = await import('../src-js/config.js');
+	const { loadConfig } = await import('../built/config.js');
 
 	/** @type {import('../src/server/api/openapi/gen-spec.js')} */
-	const { genOpenapiSpec } = await import('../src-js/server/api/openapi/gen-spec.js');
+	const { genOpenapiSpec } = await import('../built/gen-spec.js');
 
 	const config = loadConfig();
 	const spec = genOpenapiSpec(config, true);
diff --git a/packages/backend/scripts/measure-memory.mjs b/packages/backend/scripts/measure-memory.mjs
index 017252d7ec..0efc574786 100644
--- a/packages/backend/scripts/measure-memory.mjs
+++ b/packages/backend/scripts/measure-memory.mjs
@@ -25,7 +25,7 @@ async function measureMemory() {
 	const startTime = Date.now();
 
 	// Start the Misskey backend server using fork to enable IPC
-	const serverProcess = fork(join(__dirname, '../built/boot/entry.js'), [], {
+	const serverProcess = fork(join(__dirname, '../built/entry.js'), [], {
 		cwd: join(__dirname, '..'),
 		env: {
 			...process.env,
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 3c866ec47a..f08f55c4d9 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -415,6 +415,9 @@ importers:
       '@nestjs/platform-express':
         specifier: 11.1.10
         version: 11.1.10(@nestjs/common@11.1.10(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/core@11.1.10)
+      '@rollup/plugin-esm-shim':
+        specifier: 0.1.8
+        version: 0.1.8(rollup@4.54.0)
       '@sentry/vue':
         specifier: 10.32.1
         version: 10.32.1(vue@3.5.26(typescript@5.9.3))
@@ -529,9 +532,6 @@ importers:
       cross-env:
         specifier: 10.1.0
         version: 10.1.0
-      esbuild-plugin-swc:
-        specifier: 1.0.1
-        version: 1.0.1
       eslint-plugin-import:
         specifier: 2.32.0
         version: 2.32.0(@typescript-eslint/parser@8.50.1(eslint@9.39.2)(typescript@5.9.3))(eslint@9.39.2)
@@ -556,6 +556,9 @@ importers:
       pid-port:
         specifier: 2.0.0
         version: 2.0.0
+      rolldown:
+        specifier: 1.0.0-beta.58
+        version: 1.0.0-beta.58
       simple-oauth2:
         specifier: 5.1.0
         version: 5.1.0
@@ -2077,9 +2080,15 @@ packages:
   '@discordapp/twemoji@16.0.1':
     resolution: {integrity: sha512-figLiBWzjS5cyrAjLaGjM8AAaowO3qvK8rg5bA2dElB4qsaPMvBVlFDMO2d3x+nC1igt7kgWH4dvNmvvUHUF8w==}
 
+  '@emnapi/core@1.7.1':
+    resolution: {integrity: sha512-o1uhUASyo921r2XtHYOHy7gdkGLge8ghBEQHMWmyJFoXlpU58kIrhhN3w26lpQb6dspetweapMn2CSNwQ8I4wg==}
+
   '@emnapi/runtime@1.7.1':
     resolution: {integrity: sha512-PVtJr5CmLwYAU9PZDMITZoR5iAOShYREoR45EyyLrbntV50mdePTgUn4AmOw90Ifcj+x2kRjdzr1HP3RrNiHGA==}
 
+  '@emnapi/wasi-threads@1.1.0':
+    resolution: {integrity: sha512-WI0DdZ8xFSbgMjR1sFsKABJ/C5OnRrjT06JXbZKexJGrDuPTzZdDYfFlsgcCXCyf+suG5QU2e/y1Wo2V/OapLQ==}
+
   '@epic-web/invariant@1.0.0':
     resolution: {integrity: sha512-lrTPqgvfFQtR/eY/qkIzp98OGdNJu0m5ji3q/nJI8v3SXkRKEnWiOxMmbvcSoAIzv/cGiuvRy57k4suKQSAdwA==}
 
@@ -2996,6 +3005,9 @@ packages:
     resolution: {integrity: sha512-xJIPs+bYuc9ASBl+cvGsKbGrJmS6fAKaSZCnT0lhahT5rhA2VVy9/EcIgd2JhtEuFOJNx7UHNn/qiTPTY4nrQw==}
     engines: {node: '>= 10'}
 
+  '@napi-rs/wasm-runtime@1.1.1':
+    resolution: {integrity: sha512-p64ah1M1ld8xjWv3qbvFwHiFVWrq1yFvV4f7w+mzaqiR4IlSgkqhcRdHwsGgomwzBH51sRY4NEowLxnaBjcW/A==}
+
   '@nestjs/common@11.1.10':
     resolution: {integrity: sha512-NoBzJFtq1bzHGia5Q5NO1pJNpx530nupbEu/auCWOFCGL5y8Zo8kiG28EXTCDfIhQgregEtn1Cs6H8WSLUC8kg==}
     peerDependencies:
@@ -3271,6 +3283,9 @@ packages:
     peerDependencies:
       '@opentelemetry/api': ^1.1.0
 
+  '@oxc-project/types@0.106.0':
+    resolution: {integrity: sha512-QdsH3rZq480VnOHSHgPYOhjL8O8LBdcnSjM408BpPCCUc0JYYZPG9Gafl9i3OcGk/7137o+gweb4cCv3WAUykg==}
+
   '@paralleldrive/cuid2@2.3.1':
     resolution: {integrity: sha512-XO7cAxhnTZl0Yggq6jOgjiOHhbgcO4NqFqwSmQpjK3b6TEE6Uj/jfSk6wzYyemh3+I0sHirKSetjQwn5cZktFw==}
 
@@ -3441,9 +3456,102 @@ packages:
     resolution: {integrity: sha512-0EbE8LRbkogtcCXU7liAyC00n9uNG9hJ+eMyHFdUsy9lB/WGqnEBgwjA9q2cyzAVcdTkQqTBBU1XePNnN3OijA==}
     engines: {node: '>=18.17.0', npm: '>=9.5.0'}
 
+  '@rolldown/binding-android-arm64@1.0.0-beta.58':
+    resolution: {integrity: sha512-mWj5eE4Qc8TbPdGGaaLvBb9XfDPvE1EmZkJQgiGKwchkWH4oAJcRAKMTw7ZHnb1L+t7Ah41sBkAecaIsuUgsug==}
+    engines: {node: ^20.19.0 || >=22.12.0}
+    cpu: [arm64]
+    os: [android]
+
+  '@rolldown/binding-darwin-arm64@1.0.0-beta.58':
+    resolution: {integrity: sha512-wFxUymI/5R8bH8qZFYDfAxAN9CyISEIYke+95oZPiv6EWo88aa5rskjVcCpKA532R+klFmdqjbbaD56GNmTF4Q==}
+    engines: {node: ^20.19.0 || >=22.12.0}
+    cpu: [arm64]
+    os: [darwin]
+
+  '@rolldown/binding-darwin-x64@1.0.0-beta.58':
+    resolution: {integrity: sha512-ybp3MkPj23VDV9PhtRwdU5qrGhlViWRV5BjKwO6epaSlUD5lW0WyY+roN3ZAzbma/9RrMTgZ/a/gtQq8YXOcqw==}
+    engines: {node: ^20.19.0 || >=22.12.0}
+    cpu: [x64]
+    os: [darwin]
+
+  '@rolldown/binding-freebsd-x64@1.0.0-beta.58':
+    resolution: {integrity: sha512-Evxj3yh7FWvyklUYZa0qTVT9N2zX9TPDqGF056hl8hlCZ9/ndQ2xMv6uw9PD1VlLpukbsqL+/C6M0qwipL0QMg==}
+    engines: {node: ^20.19.0 || >=22.12.0}
+    cpu: [x64]
+    os: [freebsd]
+
+  '@rolldown/binding-linux-arm-gnueabihf@1.0.0-beta.58':
+    resolution: {integrity: sha512-tYeXprDOrEgVHUbPXH6MPso4cM/c6RTkmJNICMQlYdki4hGMh92aj3yU6CKs+4X5gfG0yj5kVUw/L4M685SYag==}
+    engines: {node: ^20.19.0 || >=22.12.0}
+    cpu: [arm]
+    os: [linux]
+
+  '@rolldown/binding-linux-arm64-gnu@1.0.0-beta.58':
+    resolution: {integrity: sha512-N78vmZzP6zG967Ohr+MasCjmKtis0geZ1SOVmxrA0/bklTQSzH5kHEjW5Qn+i1taFno6GEre1E40v0wuWsNOQw==}
+    engines: {node: ^20.19.0 || >=22.12.0}
+    cpu: [arm64]
+    os: [linux]
+    libc: [glibc]
+
+  '@rolldown/binding-linux-arm64-musl@1.0.0-beta.58':
+    resolution: {integrity: sha512-l+p4QVtG72C7wI2SIkNQw/KQtSjuYwS3rV6AKcWrRBF62ClsFUcif5vLaZIEbPrCXu5OFRXigXFJnxYsVVZqdQ==}
+    engines: {node: ^20.19.0 || >=22.12.0}
+    cpu: [arm64]
+    os: [linux]
+    libc: [musl]
+
+  '@rolldown/binding-linux-x64-gnu@1.0.0-beta.58':
+    resolution: {integrity: sha512-urzJX0HrXxIh0FfxwWRjfPCMeInU9qsImLQxHBgLp5ivji1EEUnOfux8KxPPnRQthJyneBrN2LeqUix9DYrNaQ==}
+    engines: {node: ^20.19.0 || >=22.12.0}
+    cpu: [x64]
+    os: [linux]
+    libc: [glibc]
+
+  '@rolldown/binding-linux-x64-musl@1.0.0-beta.58':
+    resolution: {integrity: sha512-7ijfVK3GISnXIwq/1FZo+KyAUJjL3kWPJ7rViAL6MWeEBhEgRzJ0yEd9I8N9aut8Y8ab+EKFJyRNMWZuUBwQ0A==}
+    engines: {node: ^20.19.0 || >=22.12.0}
+    cpu: [x64]
+    os: [linux]
+    libc: [musl]
+
+  '@rolldown/binding-openharmony-arm64@1.0.0-beta.58':
+    resolution: {integrity: sha512-/m7sKZCS+cUULbzyJTIlv8JbjNohxbpAOA6cM+lgWgqVzPee3U6jpwydrib328JFN/gF9A99IZEnuGYqEDJdww==}
+    engines: {node: ^20.19.0 || >=22.12.0}
+    cpu: [arm64]
+    os: [openharmony]
+
+  '@rolldown/binding-wasm32-wasi@1.0.0-beta.58':
+    resolution: {integrity: sha512-6SZk7zMgv+y3wFFQ9qE5P9NnRHcRsptL1ypmudD26PDY+PvFCvfHRkJNfclWnvacVGxjowr7JOL3a9fd1wWhUw==}
+    engines: {node: '>=14.0.0'}
+    cpu: [wasm32]
+
+  '@rolldown/binding-win32-arm64-msvc@1.0.0-beta.58':
+    resolution: {integrity: sha512-sFqfYPnBZ6xBhMkadB7UD0yjEDRvs7ipR3nCggblN+N4ODCXY6qhg/bKL39+W+dgQybL7ErD4EGERVbW9DAWvg==}
+    engines: {node: ^20.19.0 || >=22.12.0}
+    cpu: [arm64]
+    os: [win32]
+
+  '@rolldown/binding-win32-x64-msvc@1.0.0-beta.58':
+    resolution: {integrity: sha512-AnFWJdAqB8+IDPcGrATYs67Kik/6tnndNJV2jGRmwlbeNiQQ8GhRJU8ETRlINfII0pqi9k4WWLnb00p1QCxw/Q==}
+    engines: {node: ^20.19.0 || >=22.12.0}
+    cpu: [x64]
+    os: [win32]
+
   '@rolldown/pluginutils@1.0.0-beta.53':
     resolution: {integrity: sha512-vENRlFU4YbrwVqNDZ7fLvy+JR1CRkyr01jhSiDpE1u6py3OMzQfztQU2jxykW3ALNxO4kSlqIDeYyD0Y9RcQeQ==}
 
+  '@rolldown/pluginutils@1.0.0-beta.58':
+    resolution: {integrity: sha512-qWhDs6yFGR5xDfdrwiSa3CWGIHxD597uGE/A9xGqytBjANvh4rLCTTkq7szhMV4+Ygh+PMS90KVJ8xWG/TkX4w==}
+
+  '@rollup/plugin-esm-shim@0.1.8':
+    resolution: {integrity: sha512-xEU0b/BShgDDSPjidhJd4R74J9xZ9jLVtFWNGtsUXyEsdwwwB1a3XOAwwGaNIyUHD6EhxPO21JMfUmJWoMn7SA==}
+    engines: {node: '>=14.0.0'}
+    peerDependencies:
+      rollup: ^2.0.0||^3.0.0||^4.0.0
+    peerDependenciesMeta:
+      rollup:
+        optional: true
+
   '@rollup/plugin-json@6.1.0':
     resolution: {integrity: sha512-EGI2te5ENk1coGeADSIwZ7G2Q8CJS2sF120T7jLw4xFw9n7wIOXHo+kIYRAoVpJAN+kmqZSoO3Fp4JtoNF4ReA==}
     engines: {node: '>=14.0.0'}
@@ -4565,6 +4673,9 @@ packages:
   '@twemoji/parser@16.0.0':
     resolution: {integrity: sha512-jmuIjkp3OIaEemwMy3sArBwZSuZkRqmueGwRe2Zk4cFzbUJISFBJSZLDUUBNIgq3c+nY49ideYN2OiII6JUqwA==}
 
+  '@tybys/wasm-util@0.10.1':
+    resolution: {integrity: sha512-9tTaPJLSiejZKx+Bmog4uSubteqTvFrVrURwkmHixBo0G4seD0zUxp98E1DzUBJxLQ3NPwXrGKDiVjwx/DpPsg==}
+
   '@types/accepts@1.3.7':
     resolution: {integrity: sha512-Pay9fq2lM2wXPWbteBsRAGiWH2hig4ZE2asK+mm7kUzlxRTfL961rj89I6zV/E3PcIkDqyuBEcMxFT7rccugeQ==}
 
@@ -4933,10 +5044,6 @@ packages:
       eslint: ^8.57.0 || ^9.0.0
       typescript: '>=4.8.4 <6.0.0'
 
-  '@typescript-eslint/types@8.49.0':
-    resolution: {integrity: sha512-e9k/fneezorUo6WShlQpMxXh8/8wfyc+biu6tnAqA81oWrEic0k21RHzP9uqqpyBBeBKu4T+Bsjy9/b8u7obXQ==}
-    engines: {node: ^18.18.0 || ^20.9.0 || >=21.1.0}
-
   '@typescript-eslint/types@8.50.1':
     resolution: {integrity: sha512-v5lFIS2feTkNyMhd7AucE/9j/4V9v5iIbpVRncjk/K0sQ6Sb+Np9fgYS/63n6nwqahHQvbmujeBL7mp07Q9mlA==}
     engines: {node: ^18.18.0 || ^20.9.0 || >=21.1.0}
@@ -6048,6 +6155,9 @@ packages:
     resolution: {integrity: sha512-MWufYdFw53ccGjCA+Ol7XJYpAlW6/prSMzuPOTRnJGcGzuhLn4Scrz7qf6o8bROZ514ltazcIFJZevcfbo0x7A==}
     engines: {'0': node >= 6.0}
 
+  confbox@0.1.8:
+    resolution: {integrity: sha512-RMtmw0iFkeR4YV+fUOSucriAQNb9g8zFR52MWCtl+cCZOFRNL6zeB395vPzFhEjjn4fMxXudmELnl/KF/WrK6w==}
+
   config-chain@1.1.13:
     resolution: {integrity: sha512-qj+f8APARXHrM0hraqXYb2/bOVSV4PvJQlNZ/DVj0QrmNM2q2euizkeuVckQ57J+W0mRH6Hvi+k50M4Jul2VRQ==}
 
@@ -6612,9 +6722,6 @@ packages:
   es6-promisify@5.0.0:
     resolution: {integrity: sha512-C+d6UdsYDk0lMebHNR4S2NybQMMngAOnOwYBQjTOiv0MkoJMP0Myw2mgpDLBcpfCmRLxyFqYhS/CfOENq4SJhQ==}
 
-  esbuild-plugin-swc@1.0.1:
-    resolution: {integrity: sha512-K/basZARuDSHH7Krr7FdzwZF4WRLTcZa4c0R2FPuXCyYdh2nZMDdi6SYuuDv0MzKQY+jm0Afl4gltLsBzPesiQ==}
-
   esbuild@0.27.2:
     resolution: {integrity: sha512-HyNQImnsOC7X9PMNaCIeAm4ISCQXs5a5YasTXVliKv4uuBo1dKrG0A+uQS8M5eXjVMnLg3WgXaKvprHlFJQffw==}
     engines: {node: '>=18'}
@@ -8567,6 +8674,9 @@ packages:
     engines: {node: '>=10'}
     hasBin: true
 
+  mlly@1.8.0:
+    resolution: {integrity: sha512-l8D9ODSRWLe2KHJSifWGwBqpTZXIXTeo8mlKjY+E2HAakaTeNpqAyBZ8GSqLzHgw4XmHmC8whvpjJNMbFZN7/g==}
+
   mock-socket@9.3.1:
     resolution: {integrity: sha512-qxBgB7Qa2sEQgHFjj0dSigq7fX4k6Saisd5Nelwp2q8mlbAFh5dHV9JTTlF8viYJLSSWgMCZFUom8PJcMNBoJw==}
     engines: {node: '>= 8'}
@@ -9125,6 +9235,9 @@ packages:
     resolution: {integrity: sha512-HRDzbaKjC+AOWVXxAU/x54COGeIv9eb+6CkDSQoNTt4XyWoIJvuPsXizxu/Fr23EiekbtZwmh1IcIG/l/a10GQ==}
     engines: {node: '>=8'}
 
+  pkg-types@1.3.1:
+    resolution: {integrity: sha512-/Jm5M4RvtBFVkKWRu2BLUTNP8/M2a+UwuAX+ae4770q1qVGtfjG+WTCupoZixokjmHiry8uI+dlY8KXYV5HVVQ==}
+
   plimit-lit@1.6.1:
     resolution: {integrity: sha512-B7+VDyb8Tl6oMJT9oSO2CW8XC/T4UcJGrwOVoNGwOQsQYhlpfajmrMj5xeejqaASq3V/EqThyOeATEOMuSEXiA==}
     engines: {node: '>=12'}
@@ -9775,6 +9888,11 @@ packages:
     deprecated: Rimraf versions prior to v4 are no longer supported
     hasBin: true
 
+  rolldown@1.0.0-beta.58:
+    resolution: {integrity: sha512-v1FCjMZCan7f+xGAHBi+mqiE4MlH7I+SXEHSQSJoMOGNNB2UYtvMiejsq9YuUOiZjNeUeV/a21nSFbrUR+4ZCQ==}
+    engines: {node: ^20.19.0 || >=22.12.0}
+    hasBin: true
+
   rollup@4.54.0:
     resolution: {integrity: sha512-3nk8Y3a9Ea8szgKhinMlGMhGMw89mqule3KWczxhIzqudyHdCIOHw8WJlj/r329fACjKLEh13ZSk7oE22kyeIw==}
     engines: {node: '>=18.0.0', npm: '>=8.0.0'}
@@ -10756,6 +10874,9 @@ packages:
     engines: {node: '>=14.17'}
     hasBin: true
 
+  ufo@1.6.1:
+    resolution: {integrity: sha512-9a4/uxlTWJ4+a5i0ooc1rU7C7YOw3wT+UGqdeNNHWnOF9qcMBgLRS+4IYUqbczewFx4mLEig6gawh7X6mFlEkA==}
+
   uid2@0.0.4:
     resolution: {integrity: sha512-IevTus0SbGwQzYh3+fRsAMTVVPOoIVufzacXcHPmdlle1jUpq7BRL+mw3dgeLanvGZdwwbWhRV6XrcFNdBmjWA==}
 
@@ -11173,10 +11294,12 @@ packages:
   whatwg-encoding@2.0.0:
     resolution: {integrity: sha512-p41ogyeMUrw3jWclHWTQg1k05DSVXPLcVxRTYsXUk+ZooOCZLcoYgPZ/HL/D/N+uQPOtcp1me1WhBEaX02mhWg==}
     engines: {node: '>=12'}
+    deprecated: Use @exodus/bytes instead for a more spec-conformant and faster implementation
 
   whatwg-encoding@3.1.1:
     resolution: {integrity: sha512-6qN4hJdMwfYBtE3YBTTHhoeuUrDBPZmbQaxWAqSALV/MeEnR5z1xd8UKud2RAkFoPkmB+hli1TZSnyi84xz1vQ==}
     engines: {node: '>=18'}
+    deprecated: Use @exodus/bytes instead for a more spec-conformant and faster implementation
 
   whatwg-mimetype@3.0.0:
     resolution: {integrity: sha512-nt+N2dzIutVRxARx1nghPKGv1xHikU7HKdfafKkLNLindmPU/ch3U31NOCGGA/dmPcmb1VlofO0vnKAcsm0o/Q==}
@@ -12667,11 +12790,22 @@ snapshots:
       jsonfile: 5.0.0
       universalify: 0.1.2
 
+  '@emnapi/core@1.7.1':
+    dependencies:
+      '@emnapi/wasi-threads': 1.1.0
+      tslib: 2.8.1
+    optional: true
+
   '@emnapi/runtime@1.7.1':
     dependencies:
       tslib: 2.8.1
     optional: true
 
+  '@emnapi/wasi-threads@1.1.0':
+    dependencies:
+      tslib: 2.8.1
+    optional: true
+
   '@epic-web/invariant@1.0.0': {}
 
   '@esbuild/aix-ppc64@0.27.2':
@@ -13573,6 +13707,13 @@ snapshots:
       '@napi-rs/nice-win32-x64-msvc': 1.1.1
     optional: true
 
+  '@napi-rs/wasm-runtime@1.1.1':
+    dependencies:
+      '@emnapi/core': 1.7.1
+      '@emnapi/runtime': 1.7.1
+      '@tybys/wasm-util': 0.10.1
+    optional: true
+
   '@nestjs/common@11.1.10(reflect-metadata@0.2.2)(rxjs@7.8.2)':
     dependencies:
       file-type: 21.1.1
@@ -13893,6 +14034,8 @@ snapshots:
       '@opentelemetry/api': 1.9.0
       '@opentelemetry/core': 2.2.0(@opentelemetry/api@1.9.0)
 
+  '@oxc-project/types@0.106.0': {}
+
   '@paralleldrive/cuid2@2.3.1':
     dependencies:
       '@noble/hashes': 1.8.0
@@ -14117,8 +14260,58 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
+  '@rolldown/binding-android-arm64@1.0.0-beta.58':
+    optional: true
+
+  '@rolldown/binding-darwin-arm64@1.0.0-beta.58':
+    optional: true
+
+  '@rolldown/binding-darwin-x64@1.0.0-beta.58':
+    optional: true
+
+  '@rolldown/binding-freebsd-x64@1.0.0-beta.58':
+    optional: true
+
+  '@rolldown/binding-linux-arm-gnueabihf@1.0.0-beta.58':
+    optional: true
+
+  '@rolldown/binding-linux-arm64-gnu@1.0.0-beta.58':
+    optional: true
+
+  '@rolldown/binding-linux-arm64-musl@1.0.0-beta.58':
+    optional: true
+
+  '@rolldown/binding-linux-x64-gnu@1.0.0-beta.58':
+    optional: true
+
+  '@rolldown/binding-linux-x64-musl@1.0.0-beta.58':
+    optional: true
+
+  '@rolldown/binding-openharmony-arm64@1.0.0-beta.58':
+    optional: true
+
+  '@rolldown/binding-wasm32-wasi@1.0.0-beta.58':
+    dependencies:
+      '@napi-rs/wasm-runtime': 1.1.1
+    optional: true
+
+  '@rolldown/binding-win32-arm64-msvc@1.0.0-beta.58':
+    optional: true
+
+  '@rolldown/binding-win32-x64-msvc@1.0.0-beta.58':
+    optional: true
+
   '@rolldown/pluginutils@1.0.0-beta.53': {}
 
+  '@rolldown/pluginutils@1.0.0-beta.58': {}
+
+  '@rollup/plugin-esm-shim@0.1.8(rollup@4.54.0)':
+    dependencies:
+      magic-string: 0.30.21
+      mlly: 1.8.0
+    optionalDependencies:
+      rollup: 4.54.0
+
   '@rollup/plugin-json@6.1.0(rollup@4.54.0)':
     dependencies:
       '@rollup/pluginutils': 5.3.0(rollup@4.54.0)
@@ -15278,7 +15471,7 @@ snapshots:
   '@stylistic/eslint-plugin@5.5.0(eslint@9.39.2)':
     dependencies:
       '@eslint-community/eslint-utils': 4.9.0(eslint@9.39.2)
-      '@typescript-eslint/types': 8.49.0
+      '@typescript-eslint/types': 8.50.1
       eslint: 9.39.2
       eslint-visitor-keys: 4.2.1
       espree: 10.4.0
@@ -15557,6 +15750,11 @@ snapshots:
 
   '@twemoji/parser@16.0.0': {}
 
+  '@tybys/wasm-util@0.10.1':
+    dependencies:
+      tslib: 2.8.1
+    optional: true
+
   '@types/accepts@1.3.7':
     dependencies:
       '@types/node': 24.10.4
@@ -15972,8 +16170,6 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
-  '@typescript-eslint/types@8.49.0': {}
-
   '@typescript-eslint/types@8.50.1': {}
 
   '@typescript-eslint/typescript-estree@8.50.1(typescript@5.9.3)':
@@ -17327,6 +17523,8 @@ snapshots:
       readable-stream: 3.6.2
       typedarray: 0.0.6
 
+  confbox@0.1.8: {}
+
   config-chain@1.1.13:
     dependencies:
       ini: 1.3.8
@@ -18008,13 +18206,6 @@ snapshots:
       es6-promise: 4.2.8
     optional: true
 
-  esbuild-plugin-swc@1.0.1:
-    dependencies:
-      '@swc/core': 1.15.7
-      deepmerge: 4.3.1
-    transitivePeerDependencies:
-      - '@swc/helpers'
-
   esbuild@0.27.2:
     optionalDependencies:
       '@esbuild/aix-ppc64': 0.27.2
@@ -20601,6 +20792,13 @@ snapshots:
   mkdirp@1.0.4:
     optional: true
 
+  mlly@1.8.0:
+    dependencies:
+      acorn: 8.15.0
+      pathe: 2.0.3
+      pkg-types: 1.3.1
+      ufo: 1.6.1
+
   mock-socket@9.3.1: {}
 
   module-details-from-path@1.0.4: {}
@@ -21178,6 +21376,12 @@ snapshots:
     dependencies:
       find-up: 4.1.0
 
+  pkg-types@1.3.1:
+    dependencies:
+      confbox: 0.1.8
+      mlly: 1.8.0
+      pathe: 2.0.3
+
   plimit-lit@1.6.1:
     dependencies:
       queue-lit: 1.5.2
@@ -21859,6 +22063,25 @@ snapshots:
       glob: 7.2.3
     optional: true
 
+  rolldown@1.0.0-beta.58:
+    dependencies:
+      '@oxc-project/types': 0.106.0
+      '@rolldown/pluginutils': 1.0.0-beta.58
+    optionalDependencies:
+      '@rolldown/binding-android-arm64': 1.0.0-beta.58
+      '@rolldown/binding-darwin-arm64': 1.0.0-beta.58
+      '@rolldown/binding-darwin-x64': 1.0.0-beta.58
+      '@rolldown/binding-freebsd-x64': 1.0.0-beta.58
+      '@rolldown/binding-linux-arm-gnueabihf': 1.0.0-beta.58
+      '@rolldown/binding-linux-arm64-gnu': 1.0.0-beta.58
+      '@rolldown/binding-linux-arm64-musl': 1.0.0-beta.58
+      '@rolldown/binding-linux-x64-gnu': 1.0.0-beta.58
+      '@rolldown/binding-linux-x64-musl': 1.0.0-beta.58
+      '@rolldown/binding-openharmony-arm64': 1.0.0-beta.58
+      '@rolldown/binding-wasm32-wasi': 1.0.0-beta.58
+      '@rolldown/binding-win32-arm64-msvc': 1.0.0-beta.58
+      '@rolldown/binding-win32-x64-msvc': 1.0.0-beta.58
+
   rollup@4.54.0:
     dependencies:
       '@types/estree': 1.0.8
@@ -22936,6 +23159,8 @@ snapshots:
 
   typescript@5.9.3: {}
 
+  ufo@1.6.1: {}
+
   uid2@0.0.4: {}
 
   uid@2.0.2:
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
index a9443da0b3..572dc64470 100644
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -36,3 +36,6 @@ minimumReleaseAge: 10080 # delay 7days to mitigate supply-chain attack
 minimumReleaseAgeExclude:
   - '@syuilo/aiscript'
   - systeminformation # 脆弱性対応。そのうち消すこと
+  - rolldown
+  - '@rolldown/*'
+  - '@napi-rs/wasm-runtime'
diff --git a/scripts/clean-all.js b/scripts/clean-all.js
index e669eb2885..839ea3ba1c 100644
--- a/scripts/clean-all.js
+++ b/scripts/clean-all.js
@@ -8,7 +8,6 @@ const fs = require('fs');
 
 (async () => {
 	fs.rmSync(__dirname + '/../packages/backend/built', { recursive: true, force: true });
-	fs.rmSync(__dirname + '/../packages/backend/src-js', { recursive: true, force: true });
 	fs.rmSync(__dirname + '/../packages/backend/node_modules', { recursive: true, force: true });
 
 	fs.rmSync(__dirname + '/../packages/frontend-shared/built', { recursive: true, force: true });
diff --git a/scripts/clean.js b/scripts/clean.js
index c1dd5b99f5..5cce8bacab 100644
--- a/scripts/clean.js
+++ b/scripts/clean.js
@@ -7,7 +7,6 @@ const fs = require('fs');
 
 (async () => {
 	fs.rmSync(__dirname + '/../packages/backend/built', { recursive: true, force: true });
-	fs.rmSync(__dirname + '/../packages/backend/src-js', { recursive: true, force: true });
 	fs.rmSync(__dirname + '/../packages/frontend-shared/built', { recursive: true, force: true });
 	fs.rmSync(__dirname + '/../packages/frontend/built', { recursive: true, force: true });
 	fs.rmSync(__dirname + '/../packages/frontend-embed/built', { recursive: true, force: true });