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 | Package | Description |
 | ------- | ----------- |
+| [@actions/core](packages/core) | Core functions for setting results, logging, secrets and environment variables |
+| [@actions/exec](packages/exec) | Functions necessary for running tools on the command line |
 | [@actions/exit](packages/exit) | Provides utilities for exiting from an action |
+| [@actions/io](packages/io) | Core functions for CLI filesystem scenarios |
+| [@actions/tool-cache](packages/tool-cache) | Functions necessary for downloading and caching tools |
 | [@actions/toolkit](packages/toolkit) | A general-purpose toolkit for writing actions |
 
 ## Development