diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index b6ebcf6ad..5a397168d 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -1 +1 @@
-FROM mcr.microsoft.com/devcontainers/javascript-node:0-18
+FROM mcr.microsoft.com/devcontainers/javascript-node:22
diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index c6a85f788..1efe69ae2 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -4,10 +4,10 @@
 	"service": "app",
 	"workspaceFolder": "/workspace",
 	"features": {
-		"ghcr.io/devcontainers/features/node:1": {
-			"version": "20"
+		"ghcr.io/devcontainers/features/node:latest": {
+			"version": "22"
 		},
-		"ghcr.io/devcontainers-contrib/features/corepack:1": {}
+		"ghcr.io/devcontainers-contrib/features/pnpm:latest": {}
 	},
 	"forwardPorts": [3000],
 	"postCreateCommand": "sudo chmod 755 .devcontainer/init.sh && .devcontainer/init.sh",
diff --git a/.devcontainer/init.sh b/.devcontainer/init.sh
index 729e1a9d2..bcad3e6d8 100755
--- a/.devcontainer/init.sh
+++ b/.devcontainer/init.sh
@@ -4,8 +4,6 @@ set -xe
 
 sudo chown -R node /workspace
 git submodule update --init
-corepack install
-corepack enable
 pnpm config set store-dir /home/node/.local/share/pnpm/store
 pnpm install --frozen-lockfile
 cp .devcontainer/devcontainer.yml .config/default.yml
diff --git a/.dockerignore b/.dockerignore
index 087e9861e..c628b85ec 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,3 +1,5 @@
+**/.git
+
 .autogen
 .github
 .travis
@@ -7,24 +9,15 @@ Dockerfile
 build/
 built/
 db/
+compose.yml
 docker-compose.yml
 node_modules/
 packages/*/node_modules
 redis/
 files/
-fluent-emojis/
-.pnp.*
-
-# .yarn関連
-.yarn/*
-!.yarn/patches
-!.yarn/plugins
-!.yarn/releases
-!.yarn/sdks
-!.yarn/versions
-
 .pnpm-store
 
 .idea/
 packages/*/.vscode/
+packages/backend/test/compose.yml
 packages/backend/test/docker-compose.yml
diff --git a/.github/workflows/api-misskey-js.yml b/.github/workflows/api-misskey-js.yml
index 377946d58..620f1415b 100644
--- a/.github/workflows/api-misskey-js.yml
+++ b/.github/workflows/api-misskey-js.yml
@@ -15,9 +15,15 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          submodules: true
 
-      - run: corepack enable
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          run_install: false
 
       - name: Setup Node.js
         uses: actions/setup-node@v4.1.0
diff --git a/.github/workflows/check-misskey-js-version.yml b/.github/workflows/check-misskey-js-version.yml
index 676585e97..6a70cc0fe 100644
--- a/.github/workflows/check-misskey-js-version.yml
+++ b/.github/workflows/check-misskey-js-version.yml
@@ -21,7 +21,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          submodules: true
       - name: Check version
         run: |
           if [ "$(jq -r '.version' package.json)" != "$(jq -r '.version' packages/misskey-js/package.json)" ]; then
diff --git a/.github/workflows/docker-beta.yml b/.github/workflows/docker-beta.yml
index c05a0f709..2198ea7d5 100644
--- a/.github/workflows/docker-beta.yml
+++ b/.github/workflows/docker-beta.yml
@@ -14,6 +14,9 @@ jobs:
     steps:
       - name: Check out the repo
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          submodules: true
       - name: Set up Docker Buildx
         id: buildx
         uses: docker/setup-buildx-action@v3
diff --git a/.github/workflows/docker-host.yml b/.github/workflows/docker-host.yml
index 9476b9223..80928ff02 100644
--- a/.github/workflows/docker-host.yml
+++ b/.github/workflows/docker-host.yml
@@ -16,6 +16,9 @@ jobs:
     steps:
       - name: Check out the repo
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          submodules: true
       - name: Set up Docker Buildx
         id: buildx
         uses: docker/setup-buildx-action@v3
diff --git a/.github/workflows/docker-io.yml b/.github/workflows/docker-io.yml
index bc0dacd76..578cb56d3 100644
--- a/.github/workflows/docker-io.yml
+++ b/.github/workflows/docker-io.yml
@@ -16,6 +16,9 @@ jobs:
     steps:
       - name: Check out the repo
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          submodules: true
       - name: Set up Docker Buildx
         id: buildx
         uses: docker/setup-buildx-action@v3
diff --git a/.github/workflows/dockle.yml b/.github/workflows/dockle.yml
index 1daca03e4..39f32557f 100644
--- a/.github/workflows/dockle.yml
+++ b/.github/workflows/dockle.yml
@@ -14,6 +14,9 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          submodules: true
       - name: Build an image from Dockerfile
         uses: docker/build-push-action@v6
         with:
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 428ac47b3..91e318480 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -24,7 +24,7 @@ jobs:
   pnpm_install:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4.1.1
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
         submodules: true
@@ -35,7 +35,6 @@ jobs:
       with:
         node-version-file: '.node-version'
         cache: 'pnpm'
-    - run: corepack enable
     - run: pnpm i --frozen-lockfile
 
   lint:
@@ -50,7 +49,7 @@ jobs:
         - sw
         - misskey-js
     steps:
-    - uses: actions/checkout@v4.1.1
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
         submodules: true
@@ -61,7 +60,6 @@ jobs:
       with:
         node-version-file: '.node-version'
         cache: 'pnpm'
-    - run: corepack enable
     - run: pnpm i --frozen-lockfile
     - run: pnpm --filter ${{ matrix.workspace }} run eslint
 
@@ -75,7 +73,7 @@ jobs:
         - backend
         - misskey-js
     steps:
-    - uses: actions/checkout@v4.1.1
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
         submodules: true
@@ -86,7 +84,6 @@ jobs:
       with:
         node-version-file: '.node-version'
         cache: 'pnpm'
-    - run: corepack enable
     - run: pnpm i --frozen-lockfile
     - run: pnpm -r run build:tsc
       if: ${{ matrix.workspace == 'backend' }}
diff --git a/.github/workflows/test-backend.yml b/.github/workflows/test-backend.yml
index 3a2744c85..26c352699 100644
--- a/.github/workflows/test-backend.yml
+++ b/.github/workflows/test-backend.yml
@@ -48,7 +48,7 @@ jobs:
           - 56312:6379
 
     steps:
-    - uses: actions/checkout@v4.1.1
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
         submodules: true
@@ -63,7 +63,6 @@ jobs:
       with:
         node-version: ${{ matrix.node-version }}
         cache: 'pnpm'
-    - run: corepack enable
     - run: pnpm i --frozen-lockfile
     - name: Check pnpm-lock.yaml
       run: git diff --exit-code pnpm-lock.yaml
@@ -110,7 +109,7 @@ jobs:
           - 56312:6379
 
     steps:
-      - uses: actions/checkout@v4.1.1
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
           submodules: true
@@ -123,7 +122,6 @@ jobs:
         with:
           node-version: ${{ matrix.node-version }}
           cache: 'pnpm'
-      - run: corepack enable
       - run: pnpm i --frozen-lockfile
       - name: Check pnpm-lock.yaml
         run: git diff --exit-code pnpm-lock.yaml
diff --git a/.github/workflows/test-frontend.yml b/.github/workflows/test-frontend.yml
index 9095f2de3..53b486e3a 100644
--- a/.github/workflows/test-frontend.yml
+++ b/.github/workflows/test-frontend.yml
@@ -30,7 +30,7 @@ jobs:
         node-version: [22.x]
 
     steps:
-    - uses: actions/checkout@v4.1.1
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
         submodules: true
@@ -43,7 +43,6 @@ jobs:
       with:
         node-version: ${{ matrix.node-version }}
         cache: 'pnpm'
-    - run: corepack enable
     - run: pnpm i --frozen-lockfile
     - name: Check pnpm-lock.yaml
       run: git diff --exit-code pnpm-lock.yaml
diff --git a/.github/workflows/test-misskey-js.yml b/.github/workflows/test-misskey-js.yml
index 8596efbc0..7acd72fa1 100644
--- a/.github/workflows/test-misskey-js.yml
+++ b/.github/workflows/test-misskey-js.yml
@@ -27,9 +27,15 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          submodules: true
 
-      - run: corepack enable
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          run_install: false
 
       - name: Setup Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v4.1.0
diff --git a/.github/workflows/test-production.yml b/.github/workflows/test-production.yml
index 3584b26c8..dd397b550 100644
--- a/.github/workflows/test-production.yml
+++ b/.github/workflows/test-production.yml
@@ -20,7 +20,7 @@ jobs:
         node-version: [22.x]
 
     steps:
-    - uses: actions/checkout@v4.1.1
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
         submodules: true
@@ -33,7 +33,6 @@ jobs:
       with:
         node-version: ${{ matrix.node-version }}
         cache: 'pnpm'
-    - run: corepack enable
     - run: pnpm i --frozen-lockfile
     - name: Check pnpm-lock.yaml
       run: git diff --exit-code pnpm-lock.yaml
diff --git a/.github/workflows/validate-api-json.yml b/.github/workflows/validate-api-json.yml
index b3d71f49d..af590fe67 100644
--- a/.github/workflows/validate-api-json.yml
+++ b/.github/workflows/validate-api-json.yml
@@ -21,7 +21,7 @@ jobs:
         node-version: [22.x]
 
     steps:
-    - uses: actions/checkout@v4.1.1
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
         submodules: true
@@ -36,7 +36,6 @@ jobs:
         cache: 'pnpm'
     - name: Install Redocly CLI
       run: npm i -g @redocly/cli
-    - run: corepack enable
     - run: pnpm i --frozen-lockfile
     - name: Check pnpm-lock.yaml
       run: git diff --exit-code pnpm-lock.yaml
diff --git a/.gitignore b/.gitignore
index c417e9865..d74a01cc2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,17 +9,6 @@
 node_modules
 report.*.json
 
-# Yarn
-.yarn/*
-!.yarn/patches
-!.yarn/plugins
-!.yarn/releases
-!.yarn/sdks
-!.yarn/versions
-packages/frontend/.yarn/cache
-packages/backend/.yarn/cache
-packages/sw/.yarn/cache
-
 # pnpm
 .pnpm-store
 
@@ -35,8 +24,11 @@ coverage
 !/.config/example.yml
 !/.config/docker_example.yml
 !/.config/docker_example.env
+compose.yml
 docker-compose.yml
+!/.devcontainer/compose.yml
 !/.devcontainer/docker-compose.yml
+!/packages/backend/test/compose.yml
 !/packages/backend/test/docker-compose.yml
 
 # misskey
diff --git a/Dockerfile b/Dockerfile
index 6da1d1823..935d04685 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,11 +14,10 @@ RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
 	&& apt-get install -yqq --no-install-recommends \
 	build-essential
 
-RUN corepack enable
-
 WORKDIR /misskey
 
 COPY --link pnpm-lock.yaml ./
+RUN npm install -g pnpm
 RUN --mount=type=cache,target=/root/.local/share/pnpm/store,sharing=locked \
 	pnpm fetch --ignore-scripts
 
@@ -36,11 +35,7 @@ RUN pnpm i --frozen-lockfile --aggregate-output --offline \
 
 COPY --link . ./
 
-ARG NODE_ENV=production
-
-RUN git submodule update --init
-RUN pnpm build
-RUN rm -rf .git/
+RUN NODE_ENV=production pnpm build
 
 # build native dependencies for target platform
 
@@ -50,11 +45,10 @@ RUN apt-get update \
 	&& apt-get install -yqq --no-install-recommends \
 	build-essential
 
-RUN corepack enable
-
 WORKDIR /misskey
 
 COPY --link pnpm-lock.yaml ./
+RUN npm install -g pnpm
 RUN --mount=type=cache,target=/root/.local/share/pnpm/store,sharing=locked \
 	pnpm fetch --ignore-scripts
 
@@ -75,9 +69,8 @@ ARG GID="991"
 
 RUN apt-get update \
 	&& apt-get install -y --no-install-recommends \
-	  curl ffmpeg libjemalloc-dev libjemalloc2 tini \
+	curl ffmpeg libjemalloc-dev libjemalloc2 tini \
 	&& ln -s /usr/lib/$(uname -m)-linux-gnu/libjemalloc.so.2 /usr/local/lib/libjemalloc.so \
-	&& corepack enable \
 	&& groupadd -g "${GID}" misskey \
 	&& useradd -l -u "${UID}" -g "${GID}" -m -d /misskey misskey \
 	&& find / -type d -path /sys -prune -o -type d -path /proc -prune -o -type f -perm /u+s -ignore_readdir_race -exec chmod u-s {} \; \
@@ -85,9 +78,11 @@ RUN apt-get update \
 	&& apt-get clean \
 	&& rm -rf /var/lib/apt/lists
 
-USER misskey
 WORKDIR /misskey
 
+COPY --chown=misskey:misskey pnpm-lock.yaml ./
+RUN npm install -g pnpm
+
 COPY --chown=misskey:misskey --from=target-builder /misskey/node_modules ./node_modules
 COPY --chown=misskey:misskey --from=target-builder /misskey/packages/backend/node_modules ./packages/backend/node_modules
 COPY --chown=misskey:misskey --from=target-builder /misskey/packages/misskey-js/node_modules ./packages/misskey-js/node_modules
@@ -101,13 +96,10 @@ COPY --chown=misskey:misskey --from=native-builder /misskey/packages/backend/bui
 COPY --chown=misskey:misskey --from=native-builder /misskey/fluent-emojis /misskey/fluent-emojis
 COPY --chown=misskey:misskey . ./
 
-RUN corepack install \
-	&& corepack pack
-
+USER misskey
 ENV LD_PRELOAD=/usr/local/lib/libjemalloc.so
 ENV MALLOC_CONF=background_thread:true,metadata_thp:auto,dirty_decay_ms:30000,muzzy_decay_ms:30000
 ENV NODE_ENV=production
-ENV COREPACK_ENABLE_NETWORK=0
 HEALTHCHECK --interval=5s --retries=20 CMD ["/bin/bash", "/misskey/healthcheck.sh"]
 ENTRYPOINT ["/usr/bin/tini", "--"]
 CMD ["pnpm", "run", "migrateandstart:docker"]