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hardCognitionOpenAIAnthropic

Design an autonomous coding agent that resolves GitHub issues end to end (plan, edit, test, iterate).

A Devin-style agent that turns an issue into a merged PR is the hardest agent to make reliable, because every step can fail and errors compound. Here is the architecture and the loop that keeps it honest.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

A Devin-style agent that turns an issue into a merged PR is the hardest agent to make reliable, because every step can fail and errors compound. Here is the architecture and the loop that keeps it honest.

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