1.0.0-alpha3 - released 2012-05-13

Changelog

Schema: Added require-dev for development-time requirements (tests, etc), install with --dev
Schema: Added author.role to list the author's role in the project
Schema: Added minimum-stability + @<stability> flags in require for restricting packages to a certain stability
Schema: Removed recommend
Schema: suggest is now informational and can use any description for a package, not only a constraint
Break: vendor/.composer/autoload.php has been moved to vendor/autoload.php, other files are now in vendor/composer/
Added caching of repository metadata (faster startup times & failover if packagist is down)
Added removal of packages that are not needed anymore
Added include_path support for legacy projects that are full of require_once statements
Added installation notifications API to allow better statistics on Composer repositories
Added support for proxies that require authentication
Added support for private github repositories over https
Added autoloading support for root packages that use target-dir
Added awareness of the root package presence and support for it's provide/replace/conflict keys
Added IOInterface::isDecorated to test for colored output support
Added validation of licenses based on the SPDX registry
Improved repository protocol to have large cacheable parts
Fixed various bugs relating to package aliasing, proxy configuration, binaries
Various bug fixes and docs improvements