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Meta Says 1,300-Line Router Cuts Column Setup from Days to Under an Hour

Oct 20, 2026
Engineering at Meta
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Summary

Meta engineers Plawan Rath, Akhil Jindal, and Ashwini Verma report that a 1,300-line thin orchestrator routes more than 20 workflows to 14 specialized agents and performs no domain work itself. Meta says the setup cuts new-column configuration prep from three to four days by hand to under an hour. The design isolates context and contains failures.

Key Points

  • Meta says the orchestrator follows a fixed 7-step protocol, with only the delegation step using LLM reasoning
  • Plawan Rath, Akhil Jindal, and Ashwini Verma report that pipeline migration shipped as a new workflow template with zero new agent code
  • Meta says about two-thirds of the system's changes land without significant human edits

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