This folder contains tools or docs useful for project maintainers.

• CodeIgniter4 is the main development repository. It supports issues and pull requests, and has a rule to enforce GPG-signed commits. In addition to the framework source, it includes unit testing and documentation source. The three repositories following are built from this one as part of the release workflow. This repo is meant to be forked by contributors.
• framework is the released developer repository. It contains all the main pieces of the framework that developers would use to build their apps, but not the framework unit testing or the user guide source. It is meant to be downloaded by developers, or composer-installed. This is a read-only repository.
• appstarter is the released application starter repository. It is derived from the framework's app and public folders, with a composer requirement dependency to pull in the framework itself. It is meant to be downloaded or composer-installed. This is a read-only repository.
• userguide is released documentation publishing repository. It contains built versions of the user guide, corresponding to the framework releases. It could be downloaded, forked or potentially composer-installed. This is a read-only repository.
• coding-standard https://github.com/CodeIgniter/coding-standard is the coding style standards repository. It contains PHP-CS-Fixer rules to ensure consistent code style within the framework itself. It is meant to be composer-installed.
• translations is the repository holding official translations of the locale-dependent system messages. It is community-maintained, and accepts issues and pull requests. It could be downloaded, forked or composer-installed.

• setup.sh installs a git pre-commit hook into a contributor's local clone of their fork of the CodeIgniter4 repository.
• pre-commit runs PHP Lint and PHP CodeSniffer on any files to be added as part of a git commit, ensuring that they conform to the framework coding style standards, and automatically fixing what can be.

The release process is detailed in RELEASE.md. These scripts are used as part of that process:

• generate-changelog.php prepends the CHANGELOG.md entry for a new release, built from GitHub's auto-generated release notes and the SECURITY section of the version's detailed changelog. Usage: php admin/generate-changelog.php 4.x.x [--dry-run]
• prepare-release.php creates the release-4.x.x branch and updates version references in the framework source, the user guide, and the distribution build script. Usage: php admin/prepare-release.php 4.x.x
• create-release.php publishes the GitHub release for a new version, crediting every PR author since the previous release except bots. Usage: php admin/create-release.php 4.x.x [--previous=v4.x.w] [--dry-run]
• create-new-changelog.php creates the changelog and upgrade guide stubs for the next version and adds them to their index files. Usage: php admin/create-new-changelog.php <current_version> <new_version>
• check-pr-labels.php flags PRs merged after a release (default: the latest) that appear to be missing the labels used to generate the changelog. Usage: php admin/check-pr-labels.php [<version>]
• update-upgrade-guide.php fills the "Config" and "All Changes" sections of the version's upgrade guide with the project space files changed since the last release. Usage: php admin/update-upgrade-guide.php <version> [--dry-run]
• sync-release-branches.php checks out the target branch and merges upstream and the source branch into it, as done at several points of the release process. Without --push, the result is left unpushed for review. Usage: php admin/sync-release-branches.php <target> <source> [--push]

• The framework and starter subfolders contain files that will over-ride those from the development repository, when the distribution repositories are built.
• The subfolders inside admin contain "next release" files in the case of codeigniter4 and over-written distribution files in the other cases.
• The CHANGELOG.md file is generated from GitHub's auto-generated release notes, as described in RELEASE.md.