What is semantic-release?

semantic-release takes the guesswork and manual labor out of publishing software updates. Instead of a developer sitting down, deciding what the next version number should be, writing up release notes, and manually pushing the update out, this tool handles all of that automatically. Every time code changes are merged into the main project, it figures out what happened, assigns the correct version number, writes the changelog, and publishes the update. The way it works is by reading the short messages developers write when they save (or "commit") code changes. If a developer writes a message starting with "fix," the tool knows it is a bug fix and assigns a patch version bump. If the message starts with "feat," it signals a new feature and triggers a minor version bump. If the message includes "BREAKING CHANGE," it triggers a major version bump, signaling to users that they may need to adjust their own code. As long as the team follows a consistent commit message style, the tool can read the history of changes and do the right thing. This is designed for development teams who want to ship updates faster and with fewer mistakes. For example, a team building a JavaScript library used by other companies can merge a new feature in the morning and have it automatically published and documented by the afternoon, with zero manual intervention. It is especially useful for open-source projects with many contributors, since it enforces a consistent release process regardless of who wrote the code. The tool is designed to run in a continuous integration environment, which is an automated system that tests code whenever changes are pushed. It only releases after tests pass, so broken code does not get published. The project also supports plugins, meaning it can be extended to work with different programming languages and package managers beyond its default JavaScript and npm setup. If a team wants more control over timing, they can use distribution channels or work on a separate development branch, merging to the main branch only when they are ready for a public release.