LICENSE

MIT License with Attribution Requirement

Copyright (c) 2026 Gabriel Duarte Guerra

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:

1. The above copyright notice and this permission notice shall be included in
   all copies or substantial portions of the Software.

2. ATTRIBUTION REQUIREMENT — If you use this Software (modified or unmodified)
   in any public-facing product, hosted service, research publication, or any
   project distributed to users beyond yourself, you must provide visible
   credit to "Gabriel Duarte Guerra" and a link to
   https://github.com/GabriWar/umbra in at least ONE of:

     a. The README, documentation, or "about" page of your project.
     b. The credits / acknowledgements / references of any published paper,
        article, blog post, or whitepaper that relies on this Software.
     c. The user-facing UI of your product (footer, splash screen, settings,
        or about dialog).

   "Visible" means a human reading the materials in (a)-(c) can find the
   credit without specifically searching for it. A LICENSE file alone does
   not satisfy this requirement.

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.

────────────────────────────────────────────────────────────────────────────

Third-party attribution (also subject to their own licenses):

  * src/umbra/stealth/payload.js draws on patterns from h4ckf0r0day/obscura
    (Apache-2.0, https://github.com/h4ckf0r0day/obscura) — specifically the
    Function.prototype.toString masking strategy, per-session deterministic
    fingerprint seed, GPU/screen pools, and Intl.DateTimeFormat wrap.
    Reimplemented for real Chrome (Object.defineProperty patches over an
    existing browser, not a from-scratch JS environment).

  * src/umbra/stealth/tracker_domains.txt is a copy of obscura's
    pgl_domains.txt (Apache-2.0, derived from the Peter Lowe ad/tracker
    host file).

  * src/umbra/driver/aria.py and src/umbra/stealth/humanizer.py adapt
    design patterns from Huzy85/fantoma (MIT) — accessibility-tree-first
    interaction model and Killourhy-Maxion key-pair classification.

  * src/umbra/server.py mirrors the FastMCP tool-surface convention used
    by vibheksoni/stealth-browser-mcp (MIT).