# Implementation Contract The smart contract that executes the function or program desired behind a proxy. The implementation contract is the "executor" which powers the smart contract operation and performs whatever actions the smart contract was designed to perform. For upgradeable proxy contracts the implementation contract address can be changed. For these contracts the overall functionality may change in unexpected ways if proxy contract redirects to a different or unexpected implementation contract. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.chainargos.com/documentation/concept-glossary/smart-contracts/implementation-contract.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.