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Third-party notices

O2LazerRuleset

O2Lazer is licensed under the GNU Affero General Public License v3.0. The project license is included in LICENSE and has not changed with the rewrite.

Pre-rewrite versions were derived from QingQiz/BmsRuleset. That historical attribution remains applicable to the archived sources in Git history. The active O2Jam.Core/, O2Jam.Formats/ and osu.Game.Rulesets.O2Lazer/ source trees do not compile or include that former gameplay/skin implementation. Format-decoding provenance is retained separately below; rewriting integration code does not erase third-party notices for that work.

O2MusicBox

The OJN/OJM decoding implementation and OMC rearrangement table reference SirusDoma/O2MusicBox.

Copyright (c) 2018 SirusDoma

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.

Format references

The implementation also references public OJN/OJM documentation, SirusDoma/CXO2 for O2Jam gameplay-behaviour research, and the djask/o2jam_utils source project for interoperability research. No code from CXO2 or o2jam_utils is included.

Randomisation behaviour references

The independently written R-Random and retained note-by-note S-Random implementations were checked against beatoraja commit ad42f56c4658e968f93b24bf23440fe51cb9878e, specifically LaneShuffleModifier and Randomizer. Reference source files, Java test fixtures and original O2Jam client assets are not packaged in the ruleset DLL. Current menu, deliberate differences and seeded identities are documented in the randomisation contract; this notice does not replace the existing decoding attribution or the project licence.