chore: Enforce per-PR changelog updates in CI (#920)

Introduces a new process for maintaining our `CHANGELOG.md` files by
copying over [the latest `.github/workflows/changelog-check.yml` from
`MetaMask/core`](https://github.com/MetaMask/core/blob/d6ce6e1c917b1a05356df365281a5db83f500210/.github/workflows/changelog-check.yml).
See the root `README.md` on this branch for instructions.

Also opportunistically bumps `@metamask/create-release-branch` to the
latest version.

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Author: rekmarks

.github/workflows/changelog-check.yml

@@ -0,0 +1,20 @@
+name: Check Changelog
+
+on:
+  pull_request:
+    types: [opened, synchronize, labeled, unlabeled]
+  merge_group:
+
+jobs:
+  check-changelog:
+    name: Check changelog
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check changelog
+        uses: MetaMask/github-tools/.github/actions/check-changelog@v1
+        with:
+          base-branch: ${{ github.event.pull_request.base.ref }}
+          head-ref: ${{ github.head_ref }}
+          labels: ${{ toJSON(github.event.pull_request.labels) }}
+          pr-number: ${{ github.event.pull_request.number }}
+          repo: ${{ github.repository }}

README.md

@@ -62,9 +62,40 @@ purposes only.
 
 See [`packages/create-package/README.md`](packages/create-package/README.md).
 
+### Updating changelogs
+
+Each package in this repo has a file named `CHANGELOG.md` which is used to
+record consumer-facing changes that have been published over time. All
+changelogs follow the ["Keep a Changelog"](https://keepachangelog.com/)
+specification (enforced by `@metamask/auto-changelog`).
+
+If a PR introduces a consumer-facing change to one or more packages, their changelogs must
+be updated. This is enforced by CI. When updating changelogs, keep the following in mind:
+
+- A changelog is not a git history; it is a summary of consumer-facing changes introduced by
+  a particular release.
+  - Consider each PR from the perspective of a consumer of an individual package. Changelog
+    entries may differ between packages.
+  - For example, if you're introducing feature X to package A, and it contains an incidental
+    change Y to package B, the package changelogs should reflect this.
+- Place new entries under the "Unreleased" section.
+- Place changes into categories. Consult the ["Keep a Changelog"](https://keepachangelog.com/en/1.1.0/#how) specification for the list.
+- Highlight breaking changes by prefixing them with `**BREAKING:**`.
+- Omit non-consumer facing changes from the changelog.
+- Do not simply reuse the commit message, but describe exact changes to the API or usable
+  surface area of the project.
+- Use a list nested under a changelog entry to enumerate more details about a change if need be.
+- Include links (e.g. `#123) to the pull request(s) that introduced each change.
+- Combine like changes from multiple pull requests into a single changelog entry if necessary.
+- Split disparate changes from the same pull request into multiple entries if necessary.
+- Omit reverted changes from the changelog.
+
+If your PR does not contain any consumer-facing changes, add the label `no-changelog`, and the
+changelog validation CI job will be skipped.
+
 ### Releasing
 
-For information on creating releases, see the [MetaMask/core release documentation](https://github.com/MetaMask/core/blob/main/docs/contributing.md#releasing-changes).
+For information on creating releases, see the [MetaMask/core release documentation](https://github.com/MetaMask/core/blob/d6ce6e1c917b1a05356df365281a5db83f500210/docs/processes/releasing.md).
 
 ### Patches
 

package.json

@@ -57,7 +57,7 @@
     "@lavamoat/allow-scripts": "^3.3.2",
     "@lavamoat/preinstall-always-fail": "^2.1.0",
     "@metamask/auto-changelog": "^5.3.0",
-    "@metamask/create-release-branch": "^4.1.3",
+    "@metamask/create-release-branch": "^4.1.4",
     "@metamask/eslint-config": "^15.0.0",
     "@metamask/eslint-config-nodejs": "^15.0.0",
     "@metamask/eslint-config-typescript": "^15.0.0",

yarn.lock

@@ -2147,9 +2147,9 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@metamask/create-release-branch@npm:^4.1.3":
-  version: 4.1.3
-  resolution: "@metamask/create-release-branch@npm:4.1.3"
+"@metamask/create-release-branch@npm:^4.1.4":
+  version: 4.1.4
+  resolution: "@metamask/create-release-branch@npm:4.1.4"
   dependencies:
     "@metamask/action-utils": "npm:^1.0.0"
     "@metamask/auto-changelog": "npm:^4.0.0"
@@ -2168,7 +2168,7 @@ __metadata:
     prettier: ">=3.0.0"
   bin:
     create-release-branch: bin/create-release-branch.js
-  checksum: 10/fbaece7e989b559e5b8d70197b3abc86550f6678db4f35e75c0931522c45b91dc0d7fd4bb1e6aca567137d4715c803594c356ad9169ba6a6a55edf109b2827cc
+  checksum: 10/91282f9f20f576332bd88771988e58739e1dc7088068c74d54c5a3910bdab2e74c1f75b2205bdfa59a114dd18329d1080e04aada344b671348017c021edc82bc
   languageName: node
   linkType: hard
 
@@ -4094,7 +4094,7 @@ __metadata:
     "@lavamoat/allow-scripts": "npm:^3.3.2"
     "@lavamoat/preinstall-always-fail": "npm:^2.1.0"
     "@metamask/auto-changelog": "npm:^5.3.0"
-    "@metamask/create-release-branch": "npm:^4.1.3"
+    "@metamask/create-release-branch": "npm:^4.1.4"
     "@metamask/eslint-config": "npm:^15.0.0"
     "@metamask/eslint-config-nodejs": "npm:^15.0.0"
     "@metamask/eslint-config-typescript": "npm:^15.0.0"