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COPYRIGHT.md

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Copyright and Licensing

TextStack is copyright © 2026 Vasyl Vdovychenko, licensed under the GNU Affero General Public License v3.0 (AGPL-3.0).

Plain-English summary

You CAN:

  • Use TextStack for personal, internal, or community use, free of charge
  • Self-host it on your own infrastructure
  • Modify it for your own use
  • Distribute modified versions, provided you license them under AGPL-3.0
  • Study how it works and learn from the code

You MUST:

  • Share your modifications under AGPL-3.0 if you let others use them (including network access, per AGPL §13)
  • Preserve copyright notices and the LICENSE file in any redistribution
  • Make source code available to anyone you let interact with your modified version, even over a network

You CANNOT:

  • Sublicense under more permissive terms (MIT, Apache, etc.)
  • Run a modified version as a hosted commercial service without publishing your modifications and source code
  • Remove the AGPL terms from derivative works

Commercial licensing

If AGPL-3.0 obligations don't fit your use case (e.g. you want to embed TextStack in proprietary software, offer it as a hosted commercial service without sharing modifications, or use it in a context where AGPL is restricted), a commercial license is available.

Contact: mrviduus@gmail.com

Third-party content

  • Standard Ebooks seed corpus: CC0 / public domain
  • Free Dictionary API responses: public domain
  • Edge TTS: used under Microsoft's Edge Read Aloud terms
  • All third-party dependencies retain their respective licenses; see package.json, *.csproj, and Directory.Packages.props for full lists