Changelogs for Open Source Projects
Best practices for maintaining changelogs in open source projects, including contributor guidelines, release cadence, and community expectations.
Detailed Explanation
Open Source Changelog Standards
Open source projects have diverse audiences: maintainers, contributors, downstream users, and enterprise adopters. A well-maintained changelog serves all of these groups and builds trust in the project.
What Open Source Users Expect
Based on surveys and community guidelines, users expect:
- A CHANGELOG.md at the repository root — This is the conventional location. GitHub renders it automatically.
- Reverse chronological order — Newest version first. Readers care about recent changes.
- Linked version numbers — Each version links to a compare URL or tag.
- Dates on every release — ISO 8601 format (YYYY-MM-DD) for international clarity.
- An [Unreleased] section — Tracks changes that have landed on main but have not been released yet.
The [Unreleased] Section
The Keep a Changelog format recommends an [Unreleased] section at the top:
## [Unreleased]
### Added
- **api:** add webhook support
## [1.2.0] - 2026-02-20
### Added
- **auth:** add OAuth2 login
When you cut a release, move items from [Unreleased] to the new version section.
Contributor Guidelines
Add to your CONTRIBUTING.md:
- All commits must follow Conventional Commits
- Scopes should match the package name or module
- Breaking changes require the
!marker - The changelog is auto-generated — do not edit CHANGELOG.md manually
Release Cadence and Changelogs
| Cadence | Changelog Strategy |
|---|---|
| Weekly | Generate for each release, keep brief |
| Monthly | More detailed, group by feature area |
| On-demand | Comprehensive, suitable for semver |
| LTS | Include migration guides and deprecation notices |
Building Trust Through Transparency
A detailed, well-maintained changelog signals that the project is actively maintained, follows professional practices, and respects its users' time. It is one of the first things enterprise evaluators check when assessing a dependency.
Use Case
For open source maintainers who want to meet community expectations and build trust. A professional changelog reduces friction for adoption and demonstrates project maturity.