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AI Coding Copilot (Inline Completion at Scale)

AI Coding Copilot (Inline Completion at Scale)

Design the inline gray-text code-completion system for millions of developers — instant, cheap, and high quality.

Key Requirements

  • •Sub-few-hundred-ms latency (debounce, cancel, small model, caching)
  • •Context assembly under a token budget (open/nearby files, LSP)
  • •Retention (not just acceptance) as the quality signal
  • •Cost control at high QPS; privacy (no-retention / on-device option)
  • •Load shedding under pressure; never send detected secrets

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