License

The ScriptWeaver Player runtime is distributed under the Mozilla Public License 2.0 (MPL-2.0).

Plain-language summary

This is not legal advice, but the gist:

• You can use the Player to run apps you write — commercial or open-source — with no royalty.
• You can modify the Player's own source files, but improvements to those files (and only those files) must be made available under the MPL-2.0. This is file-level copyleft: it touches only the files you change, not your app or other source you ship alongside it.
• You can redistribute the Player, modified or not, as long as you preserve copyright notices and the MPL license text.

The MPL is intentionally less viral than the GPL — your application code stays whatever license you choose.

Bundled third-party code

The Player ships with several third-party components, each under its own license:

• Tcl / Tk 9 — BSD-style. Unmodified upstream vendoring.
• QuickJS — MIT. Small local patches limited to quickjs-libc.c, quickjs-libc.h, and repl.js.
• tkpath — BSD-style. One small symbol-renaming patch for macOS static linking.
• ttkbootstrap — MIT. Vendored as an unmodified upstream copy so its LICENSE travels with it.
• SQLite amalgamation — public domain.

The combination is distributable as MPL-2.0; each third-party tree continues to carry its original license text.

Per-app licensing

Apps you build on top of the Player are not derivative works of the Player files. You ship them under any license you like — proprietary, MIT, GPL, public domain — whatever fits your project.