Add CLAUDE.md with dependency management guidelines

CLAUDE.md

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+# CLAUDE.md — AI-Assisted Development Guidelines
+
+This file provides guidance for AI coding agents (Claude Code, Codex, etc.) working on the crewAI codebase.
+
+## Dependency Management
+
+**Do NOT use `override-dependencies`** (e.g. in `pyproject.toml` or similar) to resolve security audit or dependency issues.
+
+This approach:
+- Does not carry over to downstream projects that depend on crewAI
+- Can cause dependency conflicts that are potentially unresolvable
+
+**Instead:** Fix dependency issues by updating the actual dependency versions directly. Pin or bump the real dependency so the fix propagates correctly to all consumers.