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Engineering notes

What we tried, what we measured, and what we shipped — including the experiments that lost.

  1. 01
    12 min read

    I stole GitHub Copilot's cost playbook for my open-source coding agent. One trick cut cost 23%. Their biggest one made mine worse.

    How four ideas from a GitHub engineering post became four experiments in FreeCode — and why the failed one taught me the most.

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