Yarn Plugin Hooks

Hook	Description
`registerPackageExtensions`	Called when the package extensions are setup
`setupScriptEnvironment`	Called before a script is executed
`wrapScriptExecution`	Called as a script is getting executed
`wrapNetworkRequest`	Called when a network request is being made
`globalHashGeneration`	Called before the build, to compute a global hash key that we will use to detect whether packages must be rebuilt (typically when the Node version changes)
`reduceDependency`	Called during the resolution, once for each resolved package and each of their dependencies
`afterAllInstalled`	Called after the `install` method from the `Project` class successfully completed
`validateProject`	Called during the `Validation step` of the `install` method from the `Project` class
`validateWorkspace`	Called during the `Validation step` of the `install` method from the `Project` class by the `validateProject` hook.
`populateYarnPaths`	Used to notify the core of all the potential artifacts of the available linkers
`cleanGlobalArtifacts`	Called when the user requests to clean the global cache. Plugins should use this hook to remove their own global artifacts.

livingston/yarn-plugin-hooks.md