Repository context engineering at company scale (EXPLAINED)

TL;DR — Quick Answer
Use hierarchical AGENTS.md, service catalogs, ownership metadata, automated freshness checks, and retrieval indexes — not one mega context file.
The Interview Question
Design a company-wide repository context system for coding agents across 500 services. Include ownership, freshness, and how agents discover the right context.
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Context EngineeringRepository IntelligenceAGENTS.mdGoogleMicrosoftAmazon