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+<!--
+YOU MUST FILL OUT THIS ENTIRE TEMPLATE FOR YOUR PR TO BE APPROVED!
+
+DO NOT MODIFY OR REMOVE THIS TEMPLATE (INCLUDING REMOVING COMMENTS) OR YOUR PR WILL FAIL VALIDATION!
+-->
+
+# Requirements
+<!-- Your domain MUST pass ALL the requirements below, otherwise it WILL BE DENIED. -->
+<!-- Change each checkbox to [x] (all lowercase, with no spaces between the brackets) to mark it as completed. -->
+<!-- Do not modify anything in this section other than the checkboxes, or your PR will fail validation. -->
+
+- [x] <!-- TOS --> I **agree** to the [Terms of Service](https://is-a.dev/terms). <!-- Your request MUST follow the TOS to be approved. -->
+- [x] <!-- DOMAIN_STRUCTURE --> My file is following the [domain structure](https://docs.is-a.dev/domain-structure/). <!-- Your file is in the domains directory, the name is valid, it is JSON format, etc. -->
+- [x] <!-- WEBSITE_REACHABLE --> My website is **reachable** and **completed**. <!-- We do not permit simple "Hello, world!" or simply copied template websites with minimal changes. -->
+- [x] <!-- SOFTWARE_RELATED --> My website is **software development** related. <!-- We do not accept websites such as gaming, courses, AI agents/chatbots, etc. NOTE: Only your root subdomain needs to meet this requirement. -->
+- [x] <!-- NON_COMMERCIAL --> My website is **not for commercial use**. <!-- Your website's purpose should not be to generate any form of revenue or profit. (e.g. a business) -->
+- [x] <!-- CONTACT_INFO --> I have provided sufficient contact information in the `owner` key. <!-- Provide your email in the `owner` field or another platform (e.g. Twitter or Discord) for contact. -->
+- [x] <!-- WEBSITE_LINK --> I have provided a link to my website below. <!-- This step is required for your PR to be approved. -->
+
+# Website Preview
+<!-- Provide a LINK (not a screenshot) to your website below between the start/end markers. -->
+<!-- This should be a LINK to the existing domain your website is on, NOT the is-a.dev domain you're applying for. (e.g. https://abc.vercel.app, https://abc.github.io) -->
+
+<!-- WEBSITE_PREVIEW_START -->
+https://leoson.vercel.app
+<!-- WEBSITE_PREVIEW_END -->
+
+# Website Purpose
+<!-- Please tell us the purpose or motive behind your website in between the start/end markers. For example, it is a portfolio website, etc. -->
+
+<!-- WEBSITE_PURPOSE_START -->
+Personal portfolio website showcasing software development projects, skills, and applications built by Leo4yu.
+<!-- WEBSITE_PURPOSE_END -->