diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
deleted file mode 100644
index da88764351b..00000000000
--- a/.github/workflows/build.yaml
+++ /dev/null
@@ -1,52 +0,0 @@
-name: Build and verify
-on:
-  pull_request:
-  push:
-    branches: [ master ]
-permissions:
-  contents: read
-jobs:
-  build:
-    strategy:
-      matrix:
-        os: [ ubuntu-22.04 ]
-        jdk: [ 11.0.20, 17.0.8, 21.0.0 ]
-        distribution: [ temurin ]
-        experimental: [ false ]
-        include:
-          - os: macos-12
-            jdk: 17.0.8
-            distribution: temurin
-            experimental: false
-          - os: windows-2022
-            jdk: 17.0.8
-            distribution: temurin
-            experimental: false
-    runs-on: ${{ matrix.os }}
-    continue-on-error: ${{ matrix.experimental }}
-    steps:
-      # We run the build twice for each supported JDK: once against the
-      # original Error Prone release, using only Error Prone checks available
-      # on Maven Central, and once against the Picnic Error Prone fork,
-      # additionally enabling all checks defined in this project and any Error
-      # Prone checks available only from other artifact repositories.
-      - name: Check out code
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
-        with:
-          persist-credentials: false
-      - name: Set up JDK
-        uses: actions/setup-java@0ab4596768b603586c0de567f2430c30f5b0d2b0 # v3.13.0
-        with:
-          java-version: ${{ matrix.jdk }}
-          distribution: ${{ matrix.distribution }}
-          cache: maven
-      - name: Display build environment details
-        run: mvn --version
-      - name: Build project against vanilla Error Prone, compile Javadoc
-        run: mvn -T1C install javadoc:jar
-      - name: Build project with self-check against Error Prone fork
-        run: mvn -T1C clean verify -Perror-prone-fork -Pnon-maven-central -Pself-check -s settings.xml
-      - name: Remove installed project artifacts
-        run: mvn build-helper:remove-project-artifact
-
-# XXX: Enable Codecov once we "go public".
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
deleted file mode 100644
index 03ef52a5ad1..00000000000
--- a/.github/workflows/codeql.yml
+++ /dev/null
@@ -1,44 +0,0 @@
-# Analyzes the code using GitHub's default CodeQL query database.
-# Identified issues are registered with GitHub's code scanning dashboard. When
-# a pull request is analyzed, any offending lines are annotated. See
-# https://codeql.github.com for details.
-name: CodeQL analysis
-on:
-  pull_request:
-  push:
-    branches: [ master ]
-  schedule:
-    - cron: '0 4 * * 1'
-permissions:
-  contents: read
-jobs:
-  analyze:
-    strategy:
-      matrix:
-        language: [ java, ruby ]
-    permissions:
-      contents: read
-      security-events: write
-    runs-on: ubuntu-22.04
-    steps:
-      - name: Check out code
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
-        with:
-          persist-credentials: false
-      - name: Set up JDK
-        uses: actions/setup-java@0ab4596768b603586c0de567f2430c30f5b0d2b0 # v3.13.0
-        with:
-          java-version: 17.0.8
-          distribution: temurin
-          cache: maven
-      - name: Initialize CodeQL
-        uses: github/codeql-action/init@2cb752a87e96af96708ab57187ab6372ee1973ab # v2.22.0
-        with:
-          languages: ${{ matrix.language }}
-      - name: Perform minimal build
-        if: matrix.language == 'java'
-        run: mvn -T1C clean install -DskipTests -Dverification.skip
-      - name: Perform CodeQL analysis
-        uses: github/codeql-action/analyze@2cb752a87e96af96708ab57187ab6372ee1973ab # v2.22.0
-        with:
-          category: /language:${{ matrix.language }}
diff --git a/.github/workflows/deploy-website.yaml b/.github/workflows/deploy-website.yaml
deleted file mode 100644
index ce5be120b70..00000000000
--- a/.github/workflows/deploy-website.yaml
+++ /dev/null
@@ -1,51 +0,0 @@
-name: Update `error-prone.picnic.tech` website content
-on:
-  pull_request:
-  push:
-    branches: [ master, website ]
-permissions:
-  contents: read
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-jobs:
-  build:
-    runs-on: ubuntu-22.04
-    steps:
-      - name: Check out code
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
-        with:
-          persist-credentials: false
-      - uses: ruby/setup-ruby@d37167af451eb51448db3354e1057b75c4b268f7 # v1.155.0
-        with:
-          working-directory: ./website
-          bundler-cache: true
-      - name: Configure Github Pages
-        uses: actions/configure-pages@f156874f8191504dae5b037505266ed5dda6c382 # v3.0.6
-      - name: Generate documentation
-        run: ./generate-docs.sh
-      - name: Build website with Jekyll
-        working-directory: ./website
-        run: bundle exec jekyll build
-      - name: Validate HTML output
-        working-directory: ./website
-        # XXX: Drop `--disable_external true` once we fully adopted the
-        # "Refaster rules" terminology on our website and in the code.
-        run: bundle exec htmlproofer --disable_external true --check-external-hash false ./_site
-      - name: Upload website as artifact
-        uses: actions/upload-pages-artifact@a753861a5debcf57bf8b404356158c8e1e33150c # v2.0.0
-        with:
-          path: ./website/_site
-  deploy:
-    if: github.ref == 'refs/heads/website'
-    needs: build
-    permissions:
-      id-token: write
-      pages: write
-    runs-on: ubuntu-22.04
-    environment:
-      name: github-pages
-      url: ${{ steps.deployment.outputs.page_url }}
-    steps:
-      - name: Deploy to GitHub Pages
-        id: deployment
-        uses: actions/deploy-pages@9dbe3824824f8a1377b8e298bafde1a50ede43e5 # v2.0.4
diff --git a/.github/workflows/openssf-scorecard.yml b/.github/workflows/openssf-scorecard.yml
deleted file mode 100644
index 65a96d597b9..00000000000
--- a/.github/workflows/openssf-scorecard.yml
+++ /dev/null
@@ -1,36 +0,0 @@
-# Analyzes the code base and GitHub project configuration for adherence to
-# security best practices for open source software. Identified issues are
-# registered with GitHub's code scanning dashboard. When a pull request is
-# analyzed, any offending lines are annotated. See
-# https://securityscorecards.dev for details.
-name: OpenSSF Scorecard update
-on:
-  pull_request:
-  push:
-    branches: [ master ]
-  schedule:
-    - cron: '0 4 * * 1'
-permissions:
-  contents: read
-jobs:
-  analyze:
-    permissions:
-      contents: read
-      security-events: write
-      id-token: write
-    runs-on: ubuntu-22.04
-    steps:
-      - name: Check out code
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
-        with:
-          persist-credentials: false
-      - name: Run OpenSSF Scorecard analysis
-        uses: ossf/scorecard-action@0864cf19026789058feabb7e87baa5f140aac736 # v2.3.1
-        with:
-          results_file: results.sarif
-          results_format: sarif
-          publish_results: ${{ github.ref == 'refs/heads/master' }}
-      - name: Update GitHub's code scanning dashboard
-        uses: github/codeql-action/upload-sarif@2cb752a87e96af96708ab57187ab6372ee1973ab # v2.22.0
-        with:
-          sarif_file: results.sarif
diff --git a/.github/workflows/pitest-analyze-pr.yml b/.github/workflows/pitest-analyze-pr.yml
deleted file mode 100644
index 4ded8ed9548..00000000000
--- a/.github/workflows/pitest-analyze-pr.yml
+++ /dev/null
@@ -1,38 +0,0 @@
-# Performs mutation testing analysis on the files changed by a pull request and
-# uploads the results. The associated PR is subsequently updated by the
-# `pitest-update-pr.yml` workflow. See https://blog.pitest.org/oss-pitest-pr/
-# for details.
-name: "Mutation testing"
-on:
-  pull_request:
-permissions:
-  contents: read
-jobs:
-  analyze-pr:
-    runs-on: ubuntu-22.04
-    steps:
-      - name: Check out code
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
-        with:
-          fetch-depth: 2
-          persist-credentials: false
-      - name: Set up JDK
-        uses: actions/setup-java@0ab4596768b603586c0de567f2430c30f5b0d2b0 # v3.13.0
-        with:
-          java-version: 17.0.8
-          distribution: temurin
-          cache: maven
-      - name: Run Pitest
-        # By running with features `+GIT(from[HEAD~1]), +gitci`, Pitest only
-        # analyzes lines changed in the associated pull request, as GitHub
-        # exposes the changes unique to the PR as a single commit on top of the
-        # target branch. See https://blog.pitest.org/pitest-pr-setup for
-        # details.
-        run: mvn test pitest:mutationCoverage -DargLine.xmx=2048m -Dverification.skip -Dfeatures="+GIT(from[HEAD~1]), +gitci"
-      - name: Aggregate Pitest reports
-        run: mvn pitest-git:aggregate -DkilledEmoji=":tada:" -DmutantEmoji=":zombie:" -DtrailingText="Mutation testing report by [Pitest](https://pitest.org/). Review any surviving mutants by inspecting the line comments under [_Files changed_](${{ github.event.number }}/files)."
-      - name: Upload Pitest reports as artifact
-        uses: actions/upload-artifact@a8a3f3ad30e3422c9c7b888a15615d19a852ae32 # v3.1.3
-        with:
-          name: pitest-reports
-          path: ./target/pit-reports-ci
diff --git a/.github/workflows/pitest-update-pr.yml b/.github/workflows/pitest-update-pr.yml
deleted file mode 100644
index bc7b1ef6324..00000000000
--- a/.github/workflows/pitest-update-pr.yml
+++ /dev/null
@@ -1,39 +0,0 @@
-# Updates a pull request based on the corresponding mutation testing analysis
-# performed by the `pitest-analyze-pr.yml` workflow. See
-# https://blog.pitest.org/oss-pitest-pr/ for details.
-name: "Mutation testing: post results"
-on:
-  workflow_run:
-    workflows: ["Mutation testing"]
-    types:
-      - completed
-permissions:
-  actions: read
-jobs:
-  update-pr:
-    if: ${{ github.event.workflow_run.conclusion == 'success' }}
-    permissions:
-      actions: read
-      checks: write
-      contents: read
-      pull-requests: write
-    runs-on: ubuntu-22.04
-    steps:
-      - name: Check out code
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
-        with:
-          persist-credentials: false
-      - name: Set up JDK
-        uses: actions/setup-java@0ab4596768b603586c0de567f2430c30f5b0d2b0 # v3.13.0
-        with:
-          java-version: 17.0.8
-          distribution: temurin
-          cache: maven
-      - name: Download Pitest analysis artifact
-        uses: dawidd6/action-download-artifact@268677152d06ba59fcec7a7f0b5d961b6ccd7e1e # v2.28.0
-        with:
-          workflow: ${{ github.event.workflow_run.workflow_id }}
-          name: pitest-reports
-          path: ./target/pit-reports-ci
-      - name: Update PR
-        run: mvn -DrepoToken="${{ secrets.GITHUB_TOKEN }}" pitest-github:updatePR
diff --git a/.github/workflows/run-integration-tests.yml b/.github/workflows/run-integration-tests.yml
index 61926fa3a01..d714625b9c4 100644
--- a/.github/workflows/run-integration-tests.yml
+++ b/.github/workflows/run-integration-tests.yml
@@ -6,20 +6,24 @@ name: "Integration tests"
 on:
   issue_comment:
     types: [ created ]
+  # XXX: Drop.
+  pull_request:
 permissions:
   contents: read
 jobs:
   run-integration-tests:
     name: On-demand integration test
-    if: |
-      github.event.issue.pull_request && contains(github.event.comment.body, '/integration-test')
+    # XXX: Enable.
+    #if: |
+    #  github.event.issue.pull_request && contains(github.event.comment.body, '/integration-test')
     runs-on: ubuntu-22.04
     steps:
       - name: Check out code
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           persist-credentials: false
-          ref: refs/pull/${{ github.event.issue.number }}/head
+          # XXX: Enable.
+          #ref: refs/pull/${{ github.event.issue.number }}/head
       - name: Set up JDK
         uses: actions/setup-java@0ab4596768b603586c0de567f2430c30f5b0d2b0 # v3.13.0
         with:
diff --git a/.github/workflows/sonarcloud.yml b/.github/workflows/sonarcloud.yml
deleted file mode 100644
index feaedba8737..00000000000
--- a/.github/workflows/sonarcloud.yml
+++ /dev/null
@@ -1,36 +0,0 @@
-# Analyzes the code base using SonarCloud. See
-# https://sonarcloud.io/project/overview?id=PicnicSupermarket_error-prone-support.
-name: SonarCloud analysis
-on:
-  pull_request:
-  push:
-    branches: [ master ]
-  schedule:
-    - cron: '0 4 * * 1'
-permissions:
-  contents: read
-jobs:
-  analyze:
-    permissions:
-      contents: read
-    runs-on: ubuntu-22.04
-    steps:
-      - name: Check out code
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
-        with:
-          fetch-depth: 0
-          persist-credentials: false
-      - name: Set up JDK
-        uses: actions/setup-java@0ab4596768b603586c0de567f2430c30f5b0d2b0 # v3.13.0
-        with:
-          java-version: 17.0.8
-          distribution: temurin
-          cache: maven
-      - name: Create missing `test` directory
-        # XXX: Drop this step in favour of actually having a test.
-        run: mkdir refaster-compiler/src/test
-      - name: Perform SonarCloud analysis
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
-        run: mvn -T1C jacoco:prepare-agent verify jacoco:report sonar:sonar -Dverification.skip -Dsonar.projectKey=PicnicSupermarket_error-prone-support