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Code & Deliverynoun · /ˈtʃeɪndʒ.lɔːɡ/

changelog

In simple English

A changelog is a crucial artifact in software development that tracks every meaningful modification to a codebase. It serves as both a historical record and a communication tool for developers, product managers, and end users. In most tech companies, the changelog is maintained alongside code releases and is often auto-generated or manually curated to document bug fixes, new features, breaking changes, and performance improvements. Teams typically keep changelogs in files like CHANGELOG.md at the root of their repository, following conventions like Semantic Versioning to make version history clear and searchable. Developers often reference the changelog during code reviews, when onboarding new team members, or when communicating updates to stakeholders and customers.

What is a changelog and how do I use it in software projects?

At a glanceCEFR B2
Commonness4/5
Versatility4/5
FormalityCasualFormalNeutral
Spoken ↔ WrittenSpokenWrittenBoth
Directness ↔ DiplomaticDirectDiplomaticDirect
RegionUS and UK
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Say it like this

Check the changelog to see what was fixed in the latest release
We need to update the changelog before we merge this pull request
The changelog shows all breaking changes between versions

Real examples

in a standup

"I updated the changelog to reflect the new API authentication changes we shipped yesterday."

in a code review

"Please add an entry to the changelog describing this bug fix before merging."

in a team meeting

"According to the changelog, version 2.1 introduced a breaking change that some users are complaining about."

Don't say this

Handle with care. Do not use as a verb. A changelog is a document, not an action. Say 'update the changelog' not 'changelog this feature'.

We need to changelog this feature before release.
We need to add this feature to the changelog before release.Changelog is a noun (a document), not a verb. You update or add to a changelog, you do not changelog something.
The changelog shows us the history of bugs we have fixed.
The changelog shows us the history of bugs we have fixed, plus features and improvements.Changelog documents more than just bug fixes. It records all changes including new features, breaking changes, and performance improvements.
I will changelog the new endpoint tomorrow.
I will update the changelog with the new endpoint tomorrow.You update, edit, or maintain a changelog. Using changelog as a verb is not standard technical English.

Other forms

noun

changelog

"The changelog is located in the root directory of the repository."

noun (plural)

changelogs

"Different services maintain their own changelogs for independent tracking."

adjective

changelog entry

"Each changelog entry must describe the change clearly for end users."

Often used with

update the changelogMost common action: adding new information to the changelog document
check the changelogReviewing the changelog to find information about past changes or versions
maintain the changelogKeeping the changelog accurate and up-to-date throughout the development lifecycle
changelog entryA single item or record within the changelog document
CHANGELOG.mdThe standard filename for changelog files in GitHub repositories

Similar words

release notesSimilar but often more user-focused; release notes highlight major features while changelog is more comprehensive and technical
version historyBroader term that can include changelogs but also covers other version information
commit historyMore granular; shows individual commits in version control, whereas changelog summarizes meaningful changes

Practice

Try it

4 quick exercises

Pick the most natural phrasing

1. Your team just fixed a critical security issue. What do you say?

Complete the sentence

2. Before we release version 3.0, make sure to _______ every breaking change in the changelog.

Spot the mistake

3. Which sentence uses the word correctly?

Rewrite naturally

4. Rewrite using 'changelog': 'We need to write down all the changes we made so people know what is different in the new version.'

Questions

Quick poll

Have you said "changelog" in a standup this week?

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