v1.0.0

## Features

* __Feature: Allows the top-level package.json to override nested dependencies versions__

    [kaylieEB](mailto:kaylie@eventbrite.com) - (#4105)

* __Feature: Adds a `yarn-path` rc config parameter__

    [Maël Nison](mailto:nison.mael@gmail.com) - (#4204)

* __Feature: Enables Workspaces by default__

    [Burak Yiğit Kaya](mailto:ben@byk.im) - (#4262)

* __Feature: Commands are now ran from the cwd package root if possible__

    [Maël Nison](mailto:nison.mael@gmail.com) - (#4246)

* __Feature: Exposes the lockfile parser into its own npm package (`@yarnpkg/lockfile`)__

    [William Hilton](mailto:wmhilton@gmail.com) - (#4114)

* __Feature: Implements a `--cwd` flag to run Yarn in a specific directory__

    [Sebastian McKenzie](mailto:kittens@users.noreply.github.com) - (#4174)

* __Feature: Implements the `-v` command to show Yarn's version when specified without other commands__

    [kaylieEB](mailto:kaylie@eventbrite.com) - (#3913)

* __Feature: Detects and merges lockfile conflicts without user input__

    [Sebastian McKenzie](mailto:kittens@users.noreply.github.com) - (#3544)

* __Feature: Adds a preliminary support for `//` comments in package.json dependencies__

    [Joachim Seminck](mailto:joachim.seminck@gmail.com) - (#3829)

## Breaking changes

* __Breaking: Commands run via `yarn run` are now automatically forwarded trailing options__

    [Maël Nison](mailto:nison.mael@gmail.com) - (#4152)

* __Breaking: Renames `yarn clean` to `yarn autoclean`__

    [Jeff Valore](mailto:rally25rs@yahoo.com) - (#4252)

* __Breaking: Deprecates the implicit `file:` protocol, and only allow package dirs__

    [Burak Yiğit Kaya](mailto:ben@byk.im) - (#4257)

* __Breaking: Prevents `yarn add` from being run from a workspace root directory without `--dev`__

    [Maël Nison](mailto:nison.mael@gmail.com) - (#4166)

* __Breaking: Removes support for the `yarn ... ls` commands (use `list` instead of `ls`)__

    [Tiago Pina](mailto:tiagoaspina@gmail.com) - (#4045)

* __Breaking: Removes support for the `yarn ... rm` commands (use `remove` instead of `rm`)__

    [Tiago Pina](mailto:tiagoaspina@gmail.com) - (#3989)

* __Breaking: Validates the top-level `package.json` engines__

    [Adam Crabtree](mailto:dude@noderiety.com) - (#3675)

## Improvements

* __Improvement: Adds support for `git+***://` dependencies__

    [Jeremy Judeaux](mailto:Volune@users.noreply.github.com) - (#3735)

* __Improvement: Reimplements part of the integrity check to be faster and stronger__

    [Maël Nison](mailto:nison.mael@gmail.com) - (#4122)

* __Improvement: Warns when there's a missing bundledDependencies__

    [Jeff Valore](mailto:rally25rs@yahoo.com) - (#4046)

* __Improvement: Implements a `/tmp` fallback if the preferred cache folders aren't writable__

    [Maël Nison](mailto:nison.mael@gmail.com) - (#4143)

* __Improvement: Optimizes the hoisting process on large dependency trees__

    [Kenneth Chau](mailto:kenotron@users.noreply.github.com) - (#4222)

* __Improvement: Improves the error message when the tarball fetcher detects a bad hash__

    [kaylieEB](mailto:kaylie@eventbrite.com) - (#4240)

* __Improvement: Adds a `--private` flag on the `yarn init` command__

    [Pierre Neter](mailto:pierreneter@gmail.com) - (#4165)

* __Improvement: Adds support for Github URL shorthands to `yarn init`__

    [Frederick Morlock](mailto:FrederickGeek8@gmail.com) - (#4012)

* __Improvement: Improves the way packages referenced via the `file:` protocol are dedupped__

    [Jack Aldridge](mailto:jack@aldridge.io) - (#3945)

* __Improvement: Yarn is now distributed on NPM as a single file__

    [Daniel Lo Nigro](mailto:daniel@dan.cx) - (#3866)

* __Improvement: Adds retry on 5xx errors__

    [Rifat Nabi](mailto:to.rifat@gmail.com) - (#3686)

* __Improvement: Prevents creating a lockfile when there's no dependencies__

    [Pig Fang](mailto:g-plane@hotmail.com) - (#3395)

## Bugfixes

* __Fix: Prevents linking transitive dependencies on global installs__

    [Maël Nison](mailto:nison.mael@gmail.com) - (#4265)

* __Fix: Avoids creating the global and link folders unless necessary__

    [Burak Yiğit Kaya](mailto:ben@byk.im) - (#4264)

* __Fix: Exposes the `$NODE`  variable when running scripts__

    [Burak Yiğit Kaya](mailto:ben@byk.im) -  (#4260)

* __Fix: Makes `upgrade-interactive` exit with a success exit code when no upgrades are needed__

    [Jeff Valore](mailto:rally25rs@yahoo.com) - (#4261)

* __Fix: Ensures the bin folder exists before trying to use it__

    [Burak Yiğit Kaya](mailto:ben@byk.im) - (#4241)

* __Fix: Fixes the `yarn workspace` command to run in the right directories__

    [James Kyle](mailto:me@thejameskyle.com) - (#4080)

* __Fix: Adds the missing `--link-folder` flag (#4235)__

    [Maël Nison](mailto:nison.mael@gmail.com)

* __Fix: Excludes dev dependencies from the `yarn list` output when the environment is production__

    [Nick Olinger](mailto:olingern@gmail.com) - (#4092)

* __Fix: Adds the missing pre/post hooks for the `pack` script__

    [João Lucas Lucchetta](mailto:joao.lucas.lucchetta@gmail.com) - (#4193)

* __Fix: Solves artifacts disappearing when the integrity file was missing__

    [Jamie](mailto:jamsinclair@users.noreply.github.com) - (#4185)

* __Fix: Tarballs created via `yarn pack` now contain a versioned folder name instead of `dist`__

    [Burak Yiğit Kaya](mailto:ben@byk.im) - (#4094)

* __Fix: Prevents the hoisting when it would break peer dependency requirements__

    [Maël Nison](mailto:nison.mael@gmail.com) - (#4086)

* __Fix: Prevents numeric versions from being resolved to local files__

    [Burak Yiğit Kaya](mailto:ben@byk.im) - (#4088)

* __Fix: Correctly handles scripts failing with exit signals__

    [Onur Temizkan](mailto:onurtemizkan@gmail.com) - (#3995)

* __Fix: Forces workspaces to always be installed from their root__

    [Maël Nison](mailto:nison.mael@gmail.com) - (#4030)

* __Fix: Prevents running pre/post hooks if they are not scripts__

    [Burak Yiğit Kaya](mailto:ben@byk.im) - (#4068)

* __Fix: Checks for npmrc in home directory for linux root users__

    [kaylieEB](mailto:kaylie@eventbrite.com) - (#4047)

* __Fix: Prevents scoped package installs to crash with a 403 when the cache is empty__

    [Chappo](mailto:lukeggchapman@gmail.com) - (#4027)

* __Fix: Prevents optional subdependencies from being installed when using `--ignore-optional`__

    [Maël Nison](mailto:nison.mael@gmail.com) - (#3976)

* __Fix: Fixes missing path expansions__

    [Burak Yiğit Kaya](mailto:ben@byk.im) - (#4014)

* __Fix: Avoids using `process.exit()` when possible__

    [Burak Yiğit Kaya](mailto:ben@byk.im) - (#3955)

* __Fix: Global config is now also looked up in `${PREFIX}/etc/`__

    [Parakleta](mailto:parakleta@darkreality.org) - (#3958)

* __Fix: Stops assuming that all string rc parameters are paths__

    [Burak Yiğit Kaya](mailto:ben@byk.im) - (#3941)

* __Fix: Fixes yarn global prefix directory__

    [Kishan Bagaria](mailto:KishanBagaria@users.noreply.github.com) - (#3721)

* __Fix: Fixes the authentication when using `yarn publish`__

    [John Ferlito](mailto:johnf@inodes.org) - (#3862)

* __Fix: Prevents `--check-files` from crossing symlink boundaries__

    [Maël Nison](mailto:nison.mael@gmail.com) - (#3931)

* __Fix: Removes the manifest check for global commands__

    [kaylieEB](mailto:kaylie@eventbrite.com) - (#3921)

* __Fix: Correctly prioritizes git environment variables coming from the parent process__

    [Aleksejs Sinicins](mailto:monder@monder.cc) -  (#3885)

* __Fix: Prioritizes bin links at the root level__

    [kaylieEB](mailto:kaylie@eventbrite.com) - (#3877)

* __Fix: Fixes package linking when a filename case changes__

    [Maël Nison](mailto:nison.mael@gmail.com) -  (#3843)

* __Fix: Forwards SIGTERM to spawned child processes__

    [Gabriel Aumala](mailto:gaumala@espol.edu.ec) - (#3789)

* __Fix: Emoji should now default to true on darwin platforms__

    [Burak Yiğit Kaya](mailto:ben@byk.im) - (#3766)

* __Fix: Inherits env variables from the process when calling Git__

    [Burak Yiğit Kaya](mailto:ben@byk.im) - (#3743)

* __Fix: Prevents unwanted optimizations kicking in when installing a lockfile__

    [Maël Nison](mailto:nison.mael@gmail.com) - (#3729)

* __Fix: Transitive `file:` dependencies should now work properly__

    [Konstantin Raev](mailto:bestander@gmail.com) - (#3709)

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