diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index df3afbc82..b100e45bb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,92 +1,36 @@
-name: ci
+# Chevron-owned package: do not install Atom.
+# Integration / package behavior is validated by builtbygio/chevron CI
+# (bootstrap → build → smoke) when this package's pin is bumped there.
+name: CI
+
 on:
-  pull_request:
   push:
-    branches:
-    - master
-jobs:
-  tests:
-    name: tests
-    strategy:
-      matrix:
-        os: [ubuntu-18.04, macos-latest, windows-latest]
-        channel: [beta, nightly]
-      fail-fast: false
-    runs-on: ${{ matrix.os }}
-    env:
-      ATOM_GITHUB_BABEL_ENV: coverage
-      MOCHA_TIMEOUT: 60000
-      UNTIL_TIMEOUT: 30000
-    steps:
-    - uses: actions/checkout@v1
-    - name: install Atom
-      uses: UziTech/action-setup-atom@v1
-      with:
-        channel: ${{ matrix.channel }}
-
-    - name: install dependencies
-      run: apm ci
-
-    - name: configure git
-      shell: bash
-      run: |
-        git config --global user.name Hubot
-        git config --global user.email hubot@github.com
-
-    - name: Run the tests
-      if: ${{ !contains(matrix.os, 'windows') }}
-      run: atom --test test
-
-    - name: Run the tests on Windows
-      if: ${{ contains(matrix.os, 'windows') }}
-      continue-on-error: true # due to https://github.com/atom/github/pull/2459#issuecomment-624725972
-      run: atom --test test
-
-    - name: report code coverage
-      shell: bash
-      env:
-        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
-        SYSTEM_PULLREQUEST_PULLREQUESTNUMBER: ${{ github.event.number }}
-        SYSTEM_PULLREQUEST_SOURCEBRANCH: ${{ github.head_ref }}
-        BUILD_SOURCEBRANCH: ${{ github.event.ref }}
-        OS_NAME: ${{ matrix.os }}
-      run: |
-        npm run report:coverage
-        COVERAGE_NAME=$([[ "${OS_NAME}" == macos* ]] && echo "macOS" || echo "Linux")
-        bash <(curl -s https://codecov.io/bash) \
-          -n "${COVERAGE_NAME}" \
-          -P "${SYSTEM_PULLREQUEST_PULLREQUESTNUMBER:-}" \
-          -B "${SYSTEM_PULLREQUEST_SOURCEBRANCH:-${BUILD_SOURCEBRANCH}}"
-      if: |
-        !contains(matrix.os, 'windows') &&
-        (success() || failure())
-  lint:
-    name: lint
-    runs-on: ubuntu-18.04
-    steps:
-    - uses: actions/checkout@v1
-    - name: install Atom
-      uses: UziTech/action-setup-atom@v1
-      with:
-        channel: nightly
-    - name: install dependencies
-      run: apm ci
-    - name: lint
-      run: npm run lint
+    branches: [main]
+  pull_request:
 
-  snapshot-tests:
-    name: snapshot tests
-    runs-on: ubuntu-18.04
-    env:
-      ATOM_GITHUB_BABEL_ENV: coverage
-      ATOM_GITHUB_TEST_SUITE: snapshot
+jobs:
+  metadata:
+    name: package metadata
+    runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
-    - name: install Atom
-      uses: UziTech/action-setup-atom@v1
-      with:
-        channel: nightly
-    - name: install dependencies
-      run: apm ci
-    - name: run snapshot tests
-      run: atom --test test/
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '24'
+      - name: Validate package.json
+        run: |
+          node -e "
+            const p = require('./package.json');
+            if (!p.name) throw new Error('missing name');
+            if (!p.main && !p.private) console.warn('warning: no main');
+            const repo = typeof p.repository === 'string' ? p.repository : (p.repository && p.repository.url) || '';
+            if (!repo.includes('builtbygio')) {
+              // allow missing during transition; warn only if engines.chevron present
+              if (p.engines && p.engines.chevron) throw new Error('repository must point at builtbygio');
+              console.warn('warning: repository not builtbygio yet:', repo);
+            }
+            if (!p.engines || !p.engines.chevron) {
+              console.warn('warning: engines.chevron not set yet (ok for N2-folded forks)');
+            }
+            console.log('ok', p.name, p.version, repo, p.engines);
+          "