# Functional Source License, Version 1.1, Apache 2.0 Future License ## Abbreviation FSL-1.1-Apache-2.0 ## Notice Copyright 2026 openduo ## Terms and Conditions ### Licensor ("We") The party offering the Software under these Terms and Conditions. ### The Software The "Software" is each version of the software that we make available under these Terms and Conditions, as indicated by our inclusion of these Terms and Conditions with the Software. ### License Grant Subject to your compliance with this License Grant and the Patents, Redistribution and Trademark clauses below, we hereby grant you the right to use, copy, modify, create derivative works, publicly perform, publicly display and redistribute the Software for any Permitted Purpose identified below. ### Permitted Purpose A Permitted Purpose is any purpose other than a Competing Use. A Competing Use means making the Software available to others in a commercial product or service that: 1. substitutes for the Software; 2. substitutes for any other product or service we offer using the Software that exists as of the date we make the Software available; or 3. offers the same or substantially similar functionality as the Software. Permitted Purposes specifically include using the Software: 1. for your internal use and access; 2. for non-commercial education; 3. for non-commercial research; and 4. in connection with professional services that you provide to a licensee using the Software in accordance with these Terms and Conditions. ### Patents To the extent your use for a Permitted Purpose would necessarily infringe our patents, the license grant above includes a license under our patents. If you make a claim against any party that the Software infringes or contributes to the infringement of any patent, then your patent license to the Software ends immediately. ### Redistribution The Terms and Conditions apply to all copies, modifications and derivatives of the Software. If you redistribute any copies, modifications or derivatives of the Software, you must include a copy of or a link to these Terms and Conditions and not remove any copyright notices provided in or with the Software. ### Disclaimer THE SOFTWARE IS PROVIDED "AS IS" AND WITHOUT WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, TITLE OR NON-INFRINGEMENT. IN NO EVENT WILL WE HAVE ANY LIABILITY TO YOU ARISING OUT OF OR RELATED TO THE SOFTWARE, INCLUDING INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES, EVEN IF WE HAVE BEEN INFORMED OF THEIR POSSIBILITY IN ADVANCE. ### Trademarks Except for displaying the License Details and identifying us as the origin of the Software, you have no right under these Terms and Conditions to use our trademarks, trade names, service marks or product names. ## Grant of Future License We hereby irrevocably grant you an additional license to use the Software under the Apache License, Version 2.0 that is effective on the second anniversary of the date we make the Software available. On or after that date, you may use the Software under the Apache License, Version 2.0, in which case the following will apply: Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. ## Agent Addendum, Version 1.0 The following additional permissions and clarifications are part of these Terms and Conditions. They grant rights; they take none away. Nothing in this addendum permits a Competing Use or grants any trademark right. ### Scope This license covers every version of the packages `@openduo/duoduo`, `@openduo/protocol`, `@openduo/channel-feishu` and `@openduo/channel-acp` that we have published to the npm registry, including versions published before this file existed, and the contents of the `openduo/duoduo` repository. For each version, the Grant of Future License takes effect on the second anniversary of the date that version was first published. ### Agents act for you You may exercise every right in this license through software agents, including AI models and the tools they operate, acting on your behalf. What an agent does on your behalf, you do: the rights and the conditions are both yours. ### Reading is always permitted For any Permitted Purpose, you and your agents may read, de-minify, decompile, disassemble, trace, debug and analyze the Software, in whole or in part, and place any part of it in a model's context. No restriction on reverse engineering applies. The form in which we publish the Software, including minified code, is not a restriction on these rights. ### Training You may use the Software, in whole or in part, as training, fine-tuning or evaluation data for machine-learning models, and you may use and distribute the resulting models. Output from such a model that reproduces the Software, in whole or in substantial part, is a copy of the Software and remains subject to these Terms and Conditions. ### Modifications and sharing You may modify the Software and redistribute your modifications, as patches, diffs or modified builds, to anyone, for any Permitted Purpose. Whoever receives them receives them under these Terms and Conditions, which must accompany them as the Redistribution clause requires. ### Sending changes to us You may send us patches, diffs, reproductions and reports, for example in an issue or a pull request, including ones that quote or modify the Software. Anything you send us this way you license to us under the Apache License, Version 2.0, and you confirm that you have the right to do so. ### Machine-readable summary `LICENSE.agents.yaml`, published beside this file, summarizes these terms for software agents. It is a convenience. If it and this file ever differ, this file governs.