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codex
2 posts6–Jul 12, 2026
How Cursor, Claude Code, and Codex actually load your rules
Cursor loads .mdc rules conditionally, Claude Code loads CLAUDE.md upfront, Codex merges AGENTS.md by directory depth. How each tool actually works and what rule-writing habits transfer across all three.
Codex Tightens Sandbox Enforcement for Memory Consolidation
Codex enhances security by preserving parent sandbox enforcement during memory consolidation. This change is crucial for untrusted tasks.