diff --git a/.github/workflows/check-misskey-js-version.yml b/.github/workflows/check-misskey-js-version.yml
index 6a70cc0fe..26c4b654b 100644
--- a/.github/workflows/check-misskey-js-version.yml
+++ b/.github/workflows/check-misskey-js-version.yml
@@ -3,9 +3,7 @@ name: Check Misskey JS version
 on:
   push:
     branches:
-      - beta
-      - io
-      - host
+      - main
     paths:
       - packages/misskey-js/package.json
       - package.json
diff --git a/.github/workflows/docker-beta.yml b/.github/workflows/docker-beta.yml
deleted file mode 100644
index 2198ea7d5..000000000
--- a/.github/workflows/docker-beta.yml
+++ /dev/null
@@ -1,52 +0,0 @@
-name: Publish Docker image (beta)
-
-on:
-  push:
-    branches:
-      - beta
-  workflow_dispatch:
-
-jobs:
-  push_to_registry:
-    name: Push Docker image to GitHub Container Registry
-    runs-on: ubuntu-22.04
-    if: github.repository == 'MisskeyIO/misskey'
-    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
-        with:
-          platforms: linux/amd64
-      - name: Docker meta
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: ghcr.io/misskeyio/misskey
-      - name: Log in to GitHub Container Registry
-        uses: docker/login-action@v3
-        with:
-          registry: ghcr.io
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-      - name: Prepare image tags
-        run: |
-          echo "FORMATTED_BRANCH_NAME=$(echo ${{ github.ref_name }} | sed -e 's/\//-/g' )" >> $GITHUB_ENV
-      - name: Build and Push to GitHub Container Registry
-        uses: docker/build-push-action@v6
-        with:
-          builder: ${{ steps.buildx.outputs.name }}
-          context: .
-          push: true
-          platforms: ${{ steps.buildx.outputs.platforms }}
-          provenance: false
-          labels: ${{ env.FORMATTED_BRANCH_NAME }}
-          cache-from: type=registry,ref=ghcr.io/misskeyio/misskey:io-buildcache
-          cache-to: type=registry,ref=ghcr.io/misskeyio/misskey:io-buildcache,mode=max
-          tags: |
-            ghcr.io/misskeyio/misskey:beta
-            ghcr.io/misskeyio/misskey:${{ env.FORMATTED_BRANCH_NAME }}
diff --git a/.github/workflows/docker-host.yml b/.github/workflows/docker-host.yml
deleted file mode 100644
index 80928ff02..000000000
--- a/.github/workflows/docker-host.yml
+++ /dev/null
@@ -1,54 +0,0 @@
-name: Publish Docker image (host)
-
-on:
-  push:
-    branches:
-      - host
-    tags:
-      - '**-host.*'
-  workflow_dispatch:
-
-jobs:
-  push_to_registry:
-    name: Push Docker image to GitHub Container Registry
-    runs-on: ubuntu-22.04
-    if: github.repository == 'MisskeyIO/misskey'
-    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
-        with:
-          platforms: linux/amd64
-      - name: Docker meta
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: ghcr.io/misskeyio/misskey
-      - name: Log in to GitHub Container Registry
-        uses: docker/login-action@v3
-        with:
-          registry: ghcr.io
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-      - name: Prepare image tags
-        run: |
-          echo "FORMATTED_BRANCH_NAME=$(echo ${{ github.ref_name }} | sed -e 's/\//-/g' )" >> $GITHUB_ENV
-      - name: Build and Push to GitHub Container Registry
-        uses: docker/build-push-action@v6
-        with:
-          builder: ${{ steps.buildx.outputs.name }}
-          context: .
-          push: true
-          platforms: ${{ steps.buildx.outputs.platforms }}
-          provenance: false
-          labels: ${{ env.FORMATTED_BRANCH_NAME }}
-          cache-from: type=registry,ref=ghcr.io/misskeyio/misskey:host-buildcache
-          cache-to: type=registry,ref=ghcr.io/misskeyio/misskey:host-buildcache,mode=max
-          tags: |
-            ghcr.io/misskeyio/misskey:host
-            ghcr.io/misskeyio/misskey:${{ env.FORMATTED_BRANCH_NAME }}
diff --git a/.github/workflows/docker-io.yml b/.github/workflows/docker-io.yml
deleted file mode 100644
index 578cb56d3..000000000
--- a/.github/workflows/docker-io.yml
+++ /dev/null
@@ -1,54 +0,0 @@
-name: Publish Docker image (io)
-
-on:
-  push:
-    branches:
-      - io
-    tags:
-      - '**-io.*'
-  workflow_dispatch:
-
-jobs:
-  push_to_registry:
-    name: Push Docker image to GitHub Container Registry
-    runs-on: ubuntu-22.04
-    if: github.repository == 'MisskeyIO/misskey'
-    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
-        with:
-          platforms: linux/amd64
-      - name: Docker meta
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: ghcr.io/misskeyio/misskey
-      - name: Log in to GitHub Container Registry
-        uses: docker/login-action@v3
-        with:
-          registry: ghcr.io
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-      - name: Prepare image tags
-        run: |
-          echo "FORMATTED_BRANCH_NAME=$(echo ${{ github.ref_name }} | sed -e 's/\//-/g' )" >> $GITHUB_ENV
-      - name: Build and Push to GitHub Container Registry
-        uses: docker/build-push-action@v6
-        with:
-          builder: ${{ steps.buildx.outputs.name }}
-          context: .
-          push: true
-          platforms: ${{ steps.buildx.outputs.platforms }}
-          provenance: false
-          labels: ${{ env.FORMATTED_BRANCH_NAME }}
-          cache-from: type=registry,ref=ghcr.io/misskeyio/misskey:io-buildcache
-          cache-to: type=registry,ref=ghcr.io/misskeyio/misskey:io-buildcache,mode=max
-          tags: |
-            ghcr.io/misskeyio/misskey:latest
-            ghcr.io/misskeyio/misskey:${{ env.FORMATTED_BRANCH_NAME }}
diff --git a/.github/workflows/dockle.yml b/.github/workflows/dockle.yml
deleted file mode 100644
index 39f32557f..000000000
--- a/.github/workflows/dockle.yml
+++ /dev/null
@@ -1,38 +0,0 @@
-name: Dockle
-
-on:
-  push:
-    branches:
-      - beta
-      - io
-      - host
-  pull_request:
-
-jobs:
-  dockle:
-    runs-on: ubuntu-latest
-    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:
-          context: .
-          push: false
-          provenance: false
-          cache-from: type=registry,ref=ghcr.io/misskeyio/misskey:io-buildcache
-          tags: |
-            misskey:scan
-      - name: Run dockle
-        uses: docker://goodwithtech/dockle:v0.4.14
-        env:
-          DOCKLE_OUTPUT_FORMAT: list
-          DOCKLE_EXIT_CODE: 1
-          DOCKLE_EXIT_LEVEL: WARN
-          DOCKLE_IGNORES: CIS-DI-0005,CIS-DI-0010
-          DOCKLE_DEBUG: true
-        with:
-          args: 'misskey:scan'
diff --git a/.github/workflows/labeler.yml b/.github/workflows/labeler.yml
deleted file mode 100644
index 88e2aceae..000000000
--- a/.github/workflows/labeler.yml
+++ /dev/null
@@ -1,16 +0,0 @@
-name: "Pull Request Labeler"
-on:
-  pull_request_target:
-    branches-ignore:
-      - 'l10n_develop'
-
-jobs:
-  triage:
-    permissions:
-      contents: read
-      pull-requests: write
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/labeler@v5
-      with:
-        repo-token: "${{ secrets.GITHUB_TOKEN }}"
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 91e318480..b77761e16 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -3,9 +3,7 @@ name: Lint
 on:
   push:
     branches:
-      - beta
-      - io
-      - host
+      - main
     paths:
       - packages/backend/**
       - packages/frontend/**
diff --git a/.github/workflows/test-backend.yml b/.github/workflows/test-backend.yml
index 26c352699..842d5d289 100644
--- a/.github/workflows/test-backend.yml
+++ b/.github/workflows/test-backend.yml
@@ -3,9 +3,7 @@ name: Test (backend)
 on:
   push:
     branches:
-      - beta
-      - io
-      - host
+      - main
     paths:
       - packages/backend/**
       # for permissions
@@ -71,12 +69,7 @@ jobs:
     - name: Build
       run: pnpm build
     - name: Test
-      run: pnpm --filter backend test-and-coverage
-    - name: Upload to Codecov
-      uses: codecov/codecov-action@v5
-      with:
-        token: ${{ secrets.CODECOV_TOKEN }}
-        files: ./packages/backend/coverage/coverage-final.json
+      run: pnpm --filter backend test
 
   e2e:
     runs-on: ubuntu-latest
@@ -130,9 +123,4 @@ jobs:
       - name: Build
         run: pnpm build
       - name: Test
-        run: pnpm --filter backend test-and-coverage:e2e
-      - name: Upload to Codecov
-        uses: codecov/codecov-action@v5
-        with:
-          token: ${{ secrets.CODECOV_TOKEN }}
-          files: ./packages/backend/coverage/coverage-final.json
+        run: pnpm --filter backend test:e2e
diff --git a/.github/workflows/test-frontend.yml b/.github/workflows/test-frontend.yml
index 53b486e3a..5e8dad486 100644
--- a/.github/workflows/test-frontend.yml
+++ b/.github/workflows/test-frontend.yml
@@ -51,9 +51,4 @@ jobs:
     - name: Build
       run: pnpm build
     - name: Test
-      run: pnpm --filter frontend test-and-coverage
-    - name: Upload Coverage
-      uses: codecov/codecov-action@v5
-      with:
-        token: ${{ secrets.CODECOV_TOKEN }}
-        files: ./packages/frontend/coverage/coverage-final.json
+      run: pnpm --filter frontend test
diff --git a/.github/workflows/test-misskey-js.yml b/.github/workflows/test-misskey-js.yml
index 7acd72fa1..eb3db8af4 100644
--- a/.github/workflows/test-misskey-js.yml
+++ b/.github/workflows/test-misskey-js.yml
@@ -6,9 +6,7 @@ name: Test (misskey.js)
 on:
   push:
     branches:
-      - beta
-      - io
-      - host
+      - main
     paths:
       - packages/misskey-js/**
   pull_request:
@@ -56,9 +54,3 @@ jobs:
         run: pnpm --filter misskey-js test
         env:
           CI: true
-
-      - name: Upload Coverage
-        uses: codecov/codecov-action@v5
-        with:
-          token: ${{ secrets.CODECOV_TOKEN }}
-          files: ./packages/misskey-js/coverage/coverage-final.json
diff --git a/.github/workflows/test-production.yml b/.github/workflows/test-production.yml
index dd397b550..0debef5f6 100644
--- a/.github/workflows/test-production.yml
+++ b/.github/workflows/test-production.yml
@@ -3,9 +3,7 @@ name: Test (production install and build)
 on:
   push:
     branches:
-      - beta
-      - io
-      - host
+      - main
   pull_request:
 
 env:
diff --git a/.github/workflows/validate-api-json.yml b/.github/workflows/validate-api-json.yml
index af590fe67..5017a7d42 100644
--- a/.github/workflows/validate-api-json.yml
+++ b/.github/workflows/validate-api-json.yml
@@ -3,9 +3,7 @@ name: Test (backend)
 on:
   push:
     branches:
-      - beta
-      - io
-      - host
+      - main
     paths:
       - packages/backend/**
   pull_request: