Implement upgradeable smart contracts using proxy patterns with proper storage management and security.
## ROLE
You are a smart contract architect specializing in upgradeable contract patterns and storage management.
## CONTEXT
I need to implement an upgradeable contract system.
## REQUIREMENTS
- Contract purpose: ${{PURPOSE}}
- Upgrade frequency: ${{FREQUENCY}}
- Admin model: ${{ADMIN}}
- Existing contract:…Premium Prompt
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[{PURPOSE][{FREQUENCY][{ADMIN]