DesireCore License Copyright (c) 2026 Yunnan Solar Corona Technology Co., Ltd. This project uses a tiered licensing model based on version numbers (vx.y). Let x denote the latest major version and y denote the latest minor version. IMPORTANT NOTICE ON HISTORICAL VERSIONS: Versions v9 and earlier were developed and released as proprietary commercial software by Yunnan Solar Corona Technology Co., Ltd. They are NOT open source and are NOT covered by any open-source license, including the MIT License. All rights to those versions are reserved. No source code, binaries, or other materials from v9 or earlier are licensed under the terms of this document. The open-source licensing model described below applies ONLY to v10 and later. The applicable license depends on the version: Part A — v(x-1) and earlier open-source versions → MIT License Part B — vx, previous minor releases → Competition-Exclusion License (commercial use allowed) Part C — vx latest minor and dev branches → Non-Commercial & Competition-Exclusion License When a new minor version is released, the previous minor version transitions from Part C to Part B. When a new major version is released, the previous major version transitions from Part B to Part A (MIT License). Example timeline: v10.0 released → v10.0 is Part C v10.1 released → v10.0 becomes Part B, v10.1 is Part C v11.0 released → all v10.x become Part A (MIT), v11.0 is Part C Note: This MIT transition (Part A) will first take effect when v11 is released, making v10.x the first versions to receive the MIT License. Versions v9 and earlier remain proprietary and are never relicensed. ================================================================================ PART A — MIT License Applies to: v(x-1) and all earlier open-source versions (First applicable when v11 is released, covering v10.x) ================================================================================ MIT License Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ================================================================================ PART B — Competition-Exclusion License (Commercial Use Allowed) Applies to: vx previous minor releases (vx.0 – vx.(y-1)) ================================================================================ TERMS AND CONDITIONS 1. DEFINITIONS "Software" refers to the DesireCore releases covered by this Part. "Competing Product" means any software product or service that provides substantially similar functionality to DesireCore, including but not limited to delegation-based interactive agent operating systems, AI companion desktop applications, or any product that directly competes with DesireCore in the same market segment. 2. PERMITTED USE You are permitted to use, copy, modify, and distribute this Software for any purpose, including commercial purposes, provided that you comply with all the terms and conditions of this License. 3. COMPETITION EXCLUSION You may NOT use this Software, in whole or in part, to develop, build, operate, market, or contribute to any Competing Product, whether for commercial or non-commercial purposes. This restriction applies to: - Direct use of the Software's source code or binaries - Incorporating substantial portions of the Software into a Competing Product - Using the Software's architecture, design, or implementation as a basis for a Competing Product - Providing the Software or modifications thereof as part of a Competing Product's offering 4. ATTRIBUTION You must include a copy of this License and the above copyright notice in any copies or substantial portions of the Software. You must retain all copyright, patent, trademark, and attribution notices in the Software. 5. MODIFICATIONS If you modify this Software, you must clearly indicate that modifications have been made and retain all original copyright notices. Modified versions must also be licensed under this same Part (Part B). 6. NO WARRANTY THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT. IN NO EVENT SHALL YUNNAN SOLAR CORONA TECHNOLOGY CO., LTD. BE LIABLE FOR ANY CLAIM, DAMAGES, OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 7. TERMINATION Your rights under this License are automatically terminated if you violate any of its terms. Upon termination, you must cease all use and destroy all copies of the Software in your possession. ================================================================================ PART C — Non-Commercial & Competition-Exclusion License Applies to: vx latest minor and all development branches ================================================================================ TERMS AND CONDITIONS 1. DEFINITIONS "Software" refers to the latest minor release of the current major version of DesireCore, as well as all code on development branches (main/dev) and any pre-release, alpha, beta, or release-candidate versions. "Competing Product" has the same meaning as defined in Part B. 2. PERMITTED USE You are permitted to use, copy, modify, and distribute this Software for non-commercial purposes only, including educational and research purposes, provided that you comply with all the terms and conditions of this License. 3. COMMERCIAL USE RESTRICTION You may NOT use, sell, rent, lease, transfer, assign, or otherwise dispose of this Software for any commercial purpose, or in any way that generates revenue, profit, or business advantage, without prior written consent from Yunnan Solar Corona Technology Co., Ltd. 4. COMPETITION EXCLUSION You may NOT use this Software, in whole or in part, to develop, build, operate, market, or contribute to any Competing Product, whether for commercial or non-commercial purposes. This restriction applies to: - Direct use of the Software's source code or binaries - Incorporating substantial portions of the Software into a Competing Product - Using the Software's architecture, design, or implementation as a basis for a Competing Product - Providing the Software or modifications thereof as part of a Competing Product's offering 5. ATTRIBUTION You must include a copy of this License and the above copyright notice in any copies or substantial portions of the Software. You must retain all copyright, patent, trademark, and attribution notices in the Software. 6. MODIFICATIONS If you modify this Software, you must clearly indicate that modifications have been made and retain all original copyright notices. Modified versions must also be licensed under this same Part (Part C). 7. DISTRIBUTION You may distribute the Software and modifications thereof, provided that: - You include this License with every copy or substantial portion - You retain all copyright and attribution notices - Distribution is for non-commercial purposes only - The recipient agrees to all terms of this License 8. NO WARRANTY THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT. IN NO EVENT SHALL YUNNAN SOLAR CORONA TECHNOLOGY CO., LTD. BE LIABLE FOR ANY CLAIM, DAMAGES, OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 9. TERMINATION Your rights under this License are automatically terminated if you violate any of its terms. Upon termination, you must cease all use and destroy all copies of the Software in your possession. 10. GOVERNING LAW This License is governed by the laws of the People's Republic of China. ================================================================================ COMMERCIAL LICENSING ================================================================================ This tiered licensing model is designed to strike a balance between commercial investment and open-source contribution. We believe in sharing our work with the community while sustaining the resources needed to build and improve DesireCore. For commercial use of the latest version (Part C), please contact us to obtain a commercial license: Email: ceo@solar-corona.com Website: https://www.solar-corona.com We are happy to discuss licensing arrangements that work for your use case.