Python Towncrier Changelogs — ELI5

Imagine a group project at school. Instead of one person trying to remember everything everyone did at the end, each person writes a sentence on a sticky note as they finish their part. When it’s time to present, someone collects all the sticky notes and arranges them into a summary.

Towncrier works exactly like this for software. Every time a developer makes a change, they create a tiny text file — just one or two sentences describing what they did. These files pile up in a folder. When it’s time to release a new version, towncrier reads all the sticky notes, sorts them by category (new features, bug fixes, removals), and combines them into one clean changelog.

The clever part is that these snippet files go through the same review process as the code itself. A teammate can look at the snippet and say, “This description is confusing — could you reword it?” before it ever reaches the changelog.

This avoids two common problems. First, developers no longer forget to update the changelog because the snippet is part of their code change. Second, merge conflicts in the changelog file disappear because each snippet is its own separate file — two people can’t accidentally edit the same line.

One thing to remember: Towncrier collects sticky notes from every developer and combines them into one neat changelog — no one person has to remember everything.