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You can contribute to any "good first issues" in any Open Horizon repository (repo).
To begin, comment on the issues you are interested in working on if they have not been assigned to anyone else, and ask for the issue to be assigned to you. Do not begin working on an issue unless it has been assigned to you. In general, you should only work on one issue at a time unless you've submitted a PR on the first issue and you've been waiting more than 24 hours for feedback.
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