diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
deleted file mode 100644
index 3f0e8d8..0000000
--- a/.github/workflows/main.yml
+++ /dev/null
@@ -1,81 +0,0 @@
-name: CI
-
-on: [push, pull_request]
-
-permissions:
-  contents: read
-
-jobs:
-  test:
-    env:
-      MIX_ENV: test
-    runs-on: ubuntu-24.04
-    steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
-        with:
-          persist-credentials: false
-
-      - uses: erlef/setup-beam@54075bcc5e249e4758d363f27d099f55d843f124 # v1.24.1
-        with:
-          otp-version: 27.3.4.12
-          elixir-version: 1.18.1
-
-      - run: mix deps.get
-      - run: mix format --check-formatted
-      - run: mix deps.unlock --check-unused
-      - run: MIX_ENV=test mix compile --warnings-as-errors
-      - run: mix test
-
-  docker:
-    name: Docker
-    runs-on: ubuntu-24.04-arm
-
-    permissions:
-      contents: 'read'
-      id-token: 'write'
-
-    env:
-      IMAGE_NAME: 'diff'
-      PROJECT_ID: 'hexpm-prod'
-      SERVICE_ACCOUNT: ${{ secrets.GCLOUD_SERVICE_ACCOUNT }}
-      WORKLOAD_IDENTITY_PROVIDER: ${{ secrets.GCLOUD_WORKFLOW_IDENTITY_POOL_PROVIDER }}
-
-    steps:
-      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
-        with:
-          persist-credentials: false
-
-      - name: Set short git commit SHA
-        run: echo "COMMIT_SHORT_SHA=${GITHUB_SHA::7}" >> $GITHUB_ENV
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@bb05f3f5519dd87d3ba754cc423b652a5edd6d2c # v4.2.0
-
-      - name: Google auth
-        id: auth
-        uses: 'google-github-actions/auth@7c6bc770dae815cd3e89ee6cdf493a5fab2cc093' # v3.0.0
-        if: ${{ github.event_name != 'pull_request' && env.SERVICE_ACCOUNT != '' }}
-        with:
-          token_format: 'access_token'
-          project_id: ${{ env.PROJECT_ID }}
-          service_account: ${{ env.SERVICE_ACCOUNT }}
-          workload_identity_provider: ${{ env.WORKLOAD_IDENTITY_PROVIDER }}
-
-      - name: Docker Auth
-        id: docker-auth
-        uses: 'docker/login-action@af1e73f918a031802d376d3c8bbc3fe56130a9b0' # v4.4.0
-        if: ${{ github.event_name != 'pull_request' && env.SERVICE_ACCOUNT != '' }}
-        with:
-          registry: gcr.io
-          username: 'oauth2accesstoken'
-          password: '${{ steps.auth.outputs.access_token }}'
-
-      - name: Build and push
-        id: build
-        uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a # v7.3.0
-        with:
-          platforms: linux/arm64
-          tags: gcr.io/${{ env.PROJECT_ID }}/${{ env.IMAGE_NAME }}:${{ env.COMMIT_SHORT_SHA }}
-          push: ${{ github.event_name != 'pull_request' && env.SERVICE_ACCOUNT != '' }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
diff --git a/README.md b/README.md
index 360c278..bf3c7ee 100644
--- a/README.md
+++ b/README.md
@@ -1,18 +1,8 @@
 # Diff
 
-Website to display diffs between Hex package versions.
-
-## Contributing
-
-### Setup
-
-1. Run `mix setup` to install Hex and NPM dependencies
-2. Run `mix test`
-3. Run `mix phx.server` and visit [http://localhost:4004/](http://localhost:4004/)
-
-### Updating dependencies
-
-If Hex or NPM dependencies are outdated run `mix setup` again.
+This repository is archived. Hex package diffs are maintained as part of
+[hexpm/hexpm](https://github.com/hexpm/hexpm): its web interface and background
+processing both run in the Hexpm application.
 
 ## License