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# How to contribute a new feature to GHC
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We welcome your involvement in making GHC able to do more. Here's how to do it.
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We welcome your involvement in making GHC able to do more. Here's how to do it. Note that proposals for a change to the libraries (including base) should be send to the [ libraries mailinglist](http://haskell.org/haskellwiki/Library_submissions).
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1. Write down the **specification** of the feature and create a Wiki page for it. For smaller features you can use the description of the Trac ticket. Specifying before implementing is obviously a good idea; and it makes it possible for others to comment on your design before you invest heavily in building the feature.
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1. Get **feedback** by emailing a suitable list (`ghc-devs` for nitty-gritty GHC internals, `glasgow-haskell-users` for user-visible features). Often you'll get useful ideas.
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