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// 12 full challenges · hard
Coding Agents
hardBuild a coding agent that fixes failing CI
Build a coding agent that reads failing CI logs, identifies the code defect, patches the repository, and adds or preserves tests. The target repositories are Python — your agent can be implemented in any language.
Avg 8–12 h·Any language
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hardBuild a coding agent that migrates Flask routes to FastAPI
Build a coding agent that migrates Flask API endpoints to FastAPI — converting route handlers to async, adding Pydantic models, and using dependency injection. The target codebase is Python — your agent can be implemented in any language.