v1.0.0 ! 🎉

Features

• Feature: Allows the top-level package.json to override nested dependencies versions

  kaylieEB - (#4105)

• Feature: Adds a yarn-path rc config parameter

  Maël Nison - (#4204)

• Feature: Enables Workspaces by default

  Burak Yiğit Kaya - (#4262)

• Feature: Commands are now ran from the cwd package root if possible

  Maël Nison - (#4246)

• Feature: Exposes the lockfile parser into its own npm package (@yarnpkg/lockfile)

  William Hilton - (#4114)

• Feature: Implements a --cwd flag to run Yarn in a specific directory

  Sebastian McKenzie - (#4174)

• Feature: Implements the -v command to show Yarn's version when specified without other commands

  kaylieEB - (#3913)

• Feature: Detects and merges lockfile conflicts without user input

  Sebastian McKenzie - (#3544)

• Feature: Adds a preliminary support for // comments in package.json dependencies

  Joachim Seminck - (#3829)

Breaking changes

• Breaking: Commands run via yarn run are now automatically forwarded trailing options

  Maël Nison - (#4152)

• Breaking: Renames yarn clean to yarn autoclean

  Jeff Valore - (#4252)

• Breaking: Deprecates the implicit file: protocol, and only allow package dirs

  Burak Yiğit Kaya - (#4257)

• Breaking: Prevents yarn add from being run from a workspace root directory without --dev

  Maël Nison - (#4166)

• Breaking: Removes support for the yarn ... ls commands (use list instead of ls)

  Tiago Pina - (#4045)

• Breaking: Removes support for the yarn ... rm commands (use remove instead of rm)

  Tiago Pina - (#3989)

• Breaking: Validates the top-level package.json engines

  Adam Crabtree - (#3675)

Improvements

• Improvement: Adds support for git+***:// dependencies

  Jeremy Judeaux - (#3735)

• Improvement: Reimplements part of the integrity check to be faster and stronger

  Maël Nison - (#4122)

• Improvement: Warns when there's a missing bundledDependencies

  Jeff Valore - (#4046)

• Improvement: Implements a /tmp fallback if the preferred cache folders aren't writable

  Maël Nison - (#4143)

• Improvement: Optimizes the hoisting process on large dependency trees

  Kenneth Chau - (#4222)

• Improvement: Improves the error message when the tarball fetcher detects a bad hash

  kaylieEB - (#4240)

• Improvement: Adds a --private flag on the yarn init command

  Pierre Neter - (#4165)

• Improvement: Adds support for Github URL shorthands to yarn init

  Frederick Morlock - (#4012)

• Improvement: Improves the way packages referenced via the file: protocol are dedupped

  Jack Aldridge - (#3945)

• Improvement: Yarn is now distributed on NPM as a single file

  Daniel Lo Nigro - (#3866)

• Improvement: Adds retry on 5xx errors

  Rifat Nabi - (#3686)

• Improvement: Prevents creating a lockfile when there's no dependencies

  Pig Fang - (#3395)

Bugfixes

• Fix: Prevents linking transitive dependencies on global installs

  Maël Nison - (#4265)

• Fix: Avoids creating the global and link folders unless necessary

  Burak Yiğit Kaya - (#4264)

• Fix: Exposes the $NODE variable when running scripts

  Burak Yiğit Kaya - (#4260)

• Fix: Makes upgrade-interactive exit with a success exit code when no upgrades are needed

  Jeff Valore - (#4261)

• Fix: Ensures the bin folder exists before trying to use it

  Burak Yiğit Kaya - (#4241)

• Fix: Fixes the yarn workspace command to run in the right directories

  James Kyle - (#4080)

• Fix: Adds the missing --link-folder flag (#4235)

  Maël Nison

• Fix: Excludes dev dependencies from the yarn list output when the environment is production

  Nick Olinger - (#4092)

• Fix: Adds the missing pre/post hooks for the pack script

  João Lucas Lucchetta - (#4193)

• Fix: Solves artifacts disappearing when the integrity file was missing

  Jamie - (#4185)

• Fix: Tarballs created via yarn pack now contain a versioned folder name instead of dist

  Burak Yiğit Kaya - (#4094)

• Fix: Prevents the hoisting when it would break peer dependency requirements

  Maël Nison - (#4086)

• Fix: Prevents numeric versions from being resolved to local files

  Burak Yiğit Kaya - (#4088)

• Fix: Correctly handles scripts failing with exit signals

  Onur Temizkan - (#3995)

• Fix: Forces workspaces to always be installed from their root

  Maël Nison - (#4030)

• Fix: Prevents running pre/post hooks if they are not scripts

  Burak Yiğit Kaya - (#4068)

• Fix: Checks for npmrc in home directory for linux root users

  kaylieEB - (#4047)

• Fix: Prevents scoped package installs to crash with a 403 when the cache is empty

  Chappo - (#4027)

• Fix: Prevents optional subdependencies from being installed when using --ignore-optional

  Maël Nison - (#3976)

• Fix: Fixes missing path expansions

  Burak Yiğit Kaya - (#4014)

• Fix: Avoids using process.exit() when possible

  Burak Yiğit Kaya - (#3955)

• Fix: Global config is now also looked up in ${PREFIX}/etc/

  Parakleta - (#3958)

• Fix: Stops assuming that all string rc parameters are paths

  Burak Yiğit Kaya - (#3941)

• Fix: Fixes yarn global prefix directory

  Kishan Bagaria - (#3721)

• Fix: Fixes the authentication when using yarn publish

  John Ferlito - (#3862)

• Fix: Prevents --check-files from crossing symlink boundaries

  Maël Nison - (#3931)

• Fix: Removes the manifest check for global commands

  kaylieEB - (#3921)

• Fix: Correctly prioritizes git environment variables coming from the parent process

  Aleksejs Sinicins - (#3885)

• Fix: Prioritizes bin links at the root level

  kaylieEB - (#3877)

• Fix: Fixes package linking when a filename case changes

  Maël Nison - (#3843)

• Fix: Forwards SIGTERM to spawned child processes

  Gabriel Aumala - (#3789)

• Fix: Emoji should now default to true on darwin platforms

  Burak Yiğit Kaya - (#3766)

• Fix: Inherits env variables from the process when calling Git

  Burak Yiğit Kaya - (#3743)

• Fix: Prevents unwanted optimizations kicking in when installing a lockfile

  Maël Nison - (#3729)

• Fix: Transitive file: dependencies should now work properly

  Konstantin Raev - (#3709)

And a lot of various other fixes, chores, documentation, minor text fixes ..., all thanks to the community! 🐬