implement changelog skill

.github/skills/changelog/SKILL.md

@@ -0,0 +1,174 @@
+```text
+name: changelog
+description: Use for writing, reviewing, editing, or generating Meteor release changelog entries. Defines canonical file locations, naming rules, required section structure, formatting conventions, PR-based generation workflow, and common entry patterns. Applies to files under v3-docs/docs/generators/changelog/versions/.
+```
+
+# Meteor Changelog Authoring Guide
+
+Rules for creating, reviewing, and auto-generating Meteor release changelog entries.
+
+## Canonical Source
+
+All changelog source files live in:
+
+```
+v3-docs/docs/generators/changelog/versions/
+```
+
+These files are consumed by a generator that produces the public changelog.
+Never edit generated output—only modify files in this directory.
+
+Special file:
+`99999-generated-code-warning.md` is the static header for the generated page. Do not alter its structure.
+
+## File Naming Rules
+
+* One file per release
+* Filename format: `MAJOR.MINOR.PATCH.md`
+* Do not prefix versions with `v`
+* Do not add suffixes or metadata
+
+Examples:
+
+* `3.4.0.md`
+* `3.1.1.md`
+* ❌ `v3.0.0.md`
+* ❌ `3.2.0-final.md`
+
+## Required Entry Structure
+
+Every changelog file must contain **all sections below**, in this exact order.
+If a section has no content, use `N/A`.
+
+````markdown
+## v<VERSION>, <DATE>
+
+### Highlights
+
+- Description of change
+
+#### Breaking Changes
+
+N/A
+
+#### Internal API changes
+
+N/A
+
+#### Migration Steps
+
+Please run the following command to update your project:
+
+```bash
+meteor update --release <VERSION>
+```
+
+#### Bumped Meteor Packages
+
+* package-name@version
+
+#### Bumped NPM Packages
+
+N/A
+
+#### Special thanks to
+
+N/A
+
+````
+
+## Formatting Rules
+
+### Version Header
+
+```markdown
+## v3.4.0, 2025-01-30
+````
+
+* Prefix version with `v`
+* Date format: `YYYY-MM-DD`
+* Use comma + space as separator
+
+### Highlights
+
+* Use dash (`-`) bullets
+* Each bullet describes a user-facing change
+* Append PR links inline
+
+Example:
+
+```markdown
+### Highlights
+
+- Upgrade to Node v22, [PR#13997](https://github.com/meteor/meteor/pull/13997)
+- Fix bulk remove in LocalCollection to remove all items, [PR#13965](https://github.com/meteor/meteor/pull/13965)
+```
+
+For major features, use nested bullets with emoji markers:
+
+```markdown
+- **Meteor-Rspack Integration**, [PR#13910](https://github.com/meteor/meteor/pull/13910)
+  - ⚡ New `rspack` atmosphere package
+  - 📦 New `@meteorjs/rspack` npm package
+  - 📃 Documentation link
+```
+
+For feature-heavy releases, add this link **after** the Highlights list:
+
+```markdown
+All Merged PRs@[GitHub PRs 3.4](https://github.com/meteor/meteor/pulls?q=is%3Apr+is%3Amerged+base%3Arelease-3.4)
+```
+
+## Breaking Changes
+
+If none:
+
+```markdown
+#### Breaking Changes
+
+N/A
+```
+
+For package-specific breaks, wrap package names in backticks and list API changes.
+
+## Migration Steps
+
+Always start with:
+
+```bash
+meteor update --release <VERSION>
+```
+
+Add additional commands or documentation links as needed.
+
+## Bumped Meteor Packages
+
+* One package per line
+* Format: `name@version`
+* No backticks
+
+## Bumped NPM Packages
+
+Same format as Meteor packages. Use `N/A` if none.
+
+## Special Thanks
+
+Wrap contributor lists with sparkle lines:
+
+```markdown
+✨✨✨
+- [@username](https://github.com/username)
+✨✨✨
+```
+
+Use `N/A` if there are no external contributors.
+
+## Review Checklist
+
+* Filename matches `MAJOR.MINOR.PATCH.md`
+* Header format is correct
+* All required sections present and ordered
+* Empty sections use `N/A`
+* PR links and contributor links are correct
+* Package lists use `name@version`
+* No YAML frontmatter

AGENTS.md

@@ -42,6 +42,7 @@ Load these for detailed context on specific topics:
 | [packages](.github/skills/packages/SKILL.md) | Finding packages by feature, understanding dependencies |
 | [modern-tools](.github/skills/modern-tools/SKILL.md) | tools-core utilities, rspack, modern integrations |
 | [ai-context](.github/skills/ai-context/SKILL.md) | Creating, updating, or maintaining AI documentation files |
+| [changelog](.github/skills/changelog/SKILL.md) | Writing, reviewing, or editing changelog entries for releases |
 
 ## Package Domains
 

CLAUDE.md

@@ -12,3 +12,4 @@ Load these for detailed context on specific topics:
 | [packages](.github/skills/packages/SKILL.md) | Finding packages by feature, understanding dependencies |
 | [modern-tools](.github/skills/modern-tools/SKILL.md) | tools-core utilities, rspack, modern integrations |
 | [ai-context](.github/skills/ai-context/SKILL.md) | Creating, updating, or maintaining AI documentation files |
+| [changelog](.github/skills/changelog/SKILL.md) | Writing, reviewing, or editing changelog entries for releases |