1.**fix:** a commit of the _type_`fix` patches a bug in your codebase (this correlates with [`PATCH`](http://semver.org/#summary) in Semantic Versioning).
1.**feat:** a commit of the _type_`feat` introduces a new feature to the codebase (this correlates with [`MINOR`](http://semver.org/#summary) in Semantic Versioning).
1.**BREAKING CHANGE:** a commit that has a footer `BREAKING CHANGE:`, or appends a `!` after the type/scope, introduces a breaking API change (correlating with [`MAJOR`](http://semver.org/#summary) in Semantic Versioning).
A BREAKING CHANGE can be part of commits of any _type_.
1._types_ other than `fix:` and `feat:` are allowed, for example [@commitlint/config-conventional](https://github.com/conventional-changelog/commitlint/tree/master/%40commitlint/config-conventional) (based on the [the Angular convention](https://github.com/angular/angular/blob/22b96b9/CONTRIBUTING.md#-commit-message-guidelines)) recommends `build:`, `chore:`,
Additional types are not mandated by the Conventional Commits specification, and have no implicit effect in Semantic Versioning (unless they include a BREAKING CHANGE).
A scope may be provided to a commit's type, to provide additional contextual information and is contained within parenthesis, e.g., `feat(parser): add ability to parse arrays`.
## Examples
### Commit message with description and breaking change footer
```
feat: allow provided config object to extend other configs
BREAKING CHANGE: `extends` key in config file is now used for extending other config files
```
### Commit message with `!` to draw attention to breaking change
```
refactor!: drop support for Node 6
```
### Commit message with both `!` and BREAKING CHANGE footer
```
refactor!: drop support for Node 6
BREAKING CHANGE: refactor to use JavaScript features not available in Node 6.
```
### Commit message with no body
```
docs: correct spelling of CHANGELOG
```
### Commit message with scope
```
feat(lang): add polish language
```
### Commit message with multi-paragraph body and multiple footers
```
fix: correct minor typos in code
see the issue for details
on typos fixed.
Reviewed-by: Z
Refs #133
```
## Specification
The key words “MUST”, “MUST NOT”, “REQUIRED”, “SHALL”, “SHALL NOT”, “SHOULD”, “SHOULD NOT”, “RECOMMENDED”, “MAY”, and “OPTIONAL” in this document are to be interpreted as described in [RFC 2119](https://www.ietf.org/rfc/rfc2119.txt).
1. Commits MUST be prefixed with a type, which consists of a noun, `feat`, `fix`, etc., followed
by the OPTIONAL scope, OPTIONAL `!`, and REQUIRED terminal colon and space.
1. The type `feat` MUST be used when a commit adds a new feature to your application or library.
1. The type `fix` MUST be used when a commit represents a bug fix for your application.
1. A scope MAY be provided after a type. A scope MUST consist of a noun describing a
section of the codebase surrounded by parenthesis, e.g., `fix(parser):`
1. A description MUST immediately follow the colon and space after the type/scope prefix.
The description is a short summary of the code changes, e.g., _fix: array parsing issue when multiple spaces were contained in string_.
1. A longer commit body MAY be provided after the short description, providing additional contextual information about the code changes. The body MUST begin one blank line after the description.
1. A commit body is free-form and MAY consist of any number of newline separated paragraphs.
1. One or more footers MAY be provided one blank line after the body. Each footer MUST consist of
a word token, followed by either a `:<space>` or `<space>#` separator, followed by a string value (this is inspired by the
1. The units of information that make up Conventional Commits MUST NOT be treated as case sensitive by implementors, with the exception of BREAKING CHANGE which MUST be uppercase.
1. BREAKING-CHANGE MUST be synonymous with BREAKING CHANGE, when used as a token in a footer.
## Why Use Conventional Commits
* Automatically generating CHANGELOGs.
* Automatically determining a semantic version bump (based on the types of commits landed).
* Communicating the nature of changes to teammates, the public, and other stakeholders.
* Triggering build and publish processes.
* Making it easier for people to contribute to your projects, by allowing them to explore
a more structured commit history.
## FAQ
### How should I deal with commit messages in the initial development phase?
We recommend that you proceed as if you've already released the product. Typically *somebody*, even if it's your fellow software developers, is using your software. They'll want to know what's fixed, what breaks etc.
### Are the types in the commit title uppercase or lowercase?
Any casing may be used, but it's best to be consistent.
### What do I do if the commit conforms to more than one of the commit types?
Go back and make multiple commits whenever possible. Part of the benefit of Conventional Commits is its ability to drive us to make more organized commits and PRs.
### Doesn’t this discourage rapid development and fast iteration?
It discourages moving fast in a disorganized way. It helps you be able to move fast long term across multiple projects with varied contributors.
### Might Conventional Commits lead developers to limit the type of commits they make because they'll be thinking in the types provided?
Conventional Commits encourages us to make more of certain types of commits such as fixes. Other than that, the flexibility of Conventional Commits allows your team to come up with their own types and change those types over time.
### How does this relate to SemVer?
`fix` type commits should be translated to `PATCH` releases. `feat` type commits should be translated to `MINOR` releases. Commits with `BREAKING CHANGE` in the commits, regardless of type, should be translated to `MAJOR` releases.
### How should I version my extensions to the Conventional Commits Specification, e.g. `@jameswomack/conventional-commit-spec`?
We recommend using SemVer to release your own extensions to this specification (and
encourage you to make these extensions!)
### What do I do if I accidentally use the wrong commit type?
#### When you used a type that's of the spec but not the correct type, e.g. `fix` instead of `feat`
Prior to merging or releasing the mistake, we recommend using `git rebase -i` to edit the commit history. After release, the cleanup will be different according to what tools and processes you use.
#### When you used a type *not* of the spec, e.g. `feet` instead of `feat`
In a worst case scenario, it's not the end of the world if a commit lands that does not meet the Conventional Commits specification. It simply means that commit will be missed by tools that are based on the spec.
No! If you use a squash based workflow on Git lead maintainers can clean up the commit messages as they're merged—adding no workload to casual committers.
A common workflow for this is to have your git system automatically squash commits from a pull request and present a form for the lead maintainer to enter the proper git commit message for the merge.
### How does Conventional Commits handle revert commits?
Reverting code can be complicated: are you reverting multiple commits? if you revert a feature, should the next release instead be a patch?
Conventional Commits does not make an explicit effort to define revert behavior. Instead we leave it to tooling
