Nous Research used its autonomous Hermes Agent to refactor over a million lines of code in its open-source repository, reducing the codebase by 34.4% and breaking up massive files. The nearly 20-hour automated run cost approximately $19,000 to $25,000 in model fees, saving an estimated $150k to $1.8M in manual engineering labor. By utilizing a hierarchy of 1,393 subagents coordinated via git worktrees, the agent successfully improved code readability and navigability with minimal human intervention.
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