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First Large-Scale Study of Agentic Coding Context Files: 2,303 Files Analyzed — Security and Performance Rarely Specified
The first empirical study analyzing 2,303 agent context files (CLAUDE.md, .cursorrules, etc.) across 1,925 repositories finds developers prioritize functional context (build/run commands at 62.3%, implementation details at 69.9%, architecture at 67.7%) but rarely specify security (14.5%) or performance (14.5%) requirements. Context files evolve like configuration code through frequent small additions rather than static documentation.
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