Licenses & Credits

Daily Word Game clue evaluation and React game structures are adapted from:

Project: lynn/hello
Repository: https://github.com/lynn/hello
Fixed commit: 835db051e78d0dba4e38bc4b19ae5560b8efbbc3
Upstream files adapted:
- https://github.com/lynn/hello/blob/835db051e78d0dba4e38bc4b19ae5560b8efbbc3/src/Game.tsx
- https://github.com/lynn/hello/blob/835db051e78d0dba4e38bc4b19ae5560b8efbbc3/src/Row.tsx
- https://github.com/lynn/hello/blob/835db051e78d0dba4e38bc4b19ae5560b8efbbc3/src/Keyboard.tsx
- https://github.com/lynn/hello/blob/835db051e78d0dba4e38bc4b19ae5560b8efbbc3/src/clue.ts

Source-to-current mapping:
- src/Game.tsx -> game-engines/word/DailyWordGame.tsx plus state.ts helpers
  submitCurrentGuess and getGameState
- GameState -> DailyWordGame.tsx GameState
- onKey letter/Backspace/Enter branches -> DailyWordGame.tsx onKey
- guess append and six-attempt win/loss -> state.ts submitCurrentGuess
- tableRows and RowState selection -> DailyWordGame.tsx tableRows and Row.tsx
- letterInfo keyboard status aggregation -> DailyWordGame.tsx letterInfo
- src/Keyboard.tsx three-row flow -> game-engines/word/Keyboard.tsx
- src/clue.ts exact-first/elusive-letter consumption -> game-engines/word/clue.ts

Modifications:
- Fixed the game to one five-letter, six-attempt daily mode.
- Removed random games, challenges, sharing, multiple word lengths, and hard modes.
- Replaced upstream dictionaries and targets with independently curated project data.
- Added deterministic UTC daily selection, local progress, shared statistics, analytics hooks,
  Next.js client integration, responsive styling, and accessibility labels.

Copyright (c) 2022 Lynn

MIT License

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.

Daily Sudoku puzzle generation and game logic are adapted from:

Project: eqlis/sudoku
Repository: https://github.com/eqlis/sudoku
Fixed commit: 31a6193a871bf82217f83147d5a1851ee007790c
License: MIT
Copyright (c) 2026 eqlis

Upstream files adapted:
- lib/sudoku/types.ts
- lib/sudoku/constants.ts
- lib/sudoku/sudoku-state.ts
- lib/sudoku/solutions-counter.ts
- lib/sudoku/solver.ts
- lib/sudoku/generator.ts

Source-to-current mapping:
- lib/sudoku/*.ts -> game-engines/sudoku/sudoku-core.ts (combined into one module)
- Puzzle display, input handling, timer -> game-engines/sudoku/DailySudokuGame.tsx (new)

Modifications:
- Combined multi-file library into a single sudoku-core.ts module.
- Added seeded-RNG parameter to generateGrid() to support UTC daily deterministic puzzles.
- Removed Next.js-specific persistence; localStorage handled by project's lib/stats.
- Built new React component DailySudokuGame.tsx with difficulty selector, timer,
  accessible grid, numpad, and integration with shared stats/analytics framework.

MIT License

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.

Daily 2048 tile movement and merging logic are adapted from:

Project: jinhucheung/2048-react
Repository: https://github.com/jinhucheung/2048-react
Fixed commit: 63c77f4bb6b0b902c0277b4fec7aea12b65cdc75
License: MIT
Copyright (c) 2018 Jin Hu Cheung

This project is in turn based on:
Project: gabrielecirulli/2048
Repository: https://github.com/gabrielecirulli/2048
License: MIT
Copyright (c) 2014 Gabriele Cirulli

Upstream files adapted:
- src/Game.tsx (core game class: move directions, merge, score, tile generation)
- src/Cell.tsx (tile display approach)
- src/Cells.tsx (grid layout approach)

Source-to-current mapping:
- Game class movement methods -> game-engines/game-2048/game-core.ts move() and compress()
- generateBlock() -> game-engines/game-2048/game-core.ts addTile()
- Cell/Cells rendering -> game-engines/game-2048/Daily2048Game.tsx board render
- New component shell -> game-engines/game-2048/Daily2048Game.tsx (new)

Modifications:
- Converted event-callback class to pure state-transform functions.
- Added seeded-RNG parameter to initBoard() for UTC daily initial-board generation.
- Touch-swipe controls added for mobile.
- Integrated shared UTC dateKey, localStorage progress, stats, and analytics.
- Adapted to TypeScript strict mode and static-export constraints.

MIT License

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.

Daily Word Groups puzzle selection and game-state management logic are adapted from:

Project: uday-nc/connection-clone-nextjs
Repository: https://github.com/uday-nc/connection-clone-nextjs
Fixed commit: 90c0ec73c9efb6025cd623d19b547466d96e54ad
License: MIT
Copyright (c) 2025 Uday N. Chakraborty

Upstream files adapted:
- src/hooks/useGame.ts (game state, tile selection, category validation)
- src/types/game.ts (Category, GameState interfaces)
- src/components/WordTile.tsx (tile button component)
- src/components/Modal.tsx (overlay modal)
- src/components/MessageDisplay.tsx (toast notifications)
- src/app/page.tsx (grid layout and controls)

Source-to-current mapping:
- src/hooks/useGame.ts -> game-engines/word-groups/useWordGroups.ts
- src/types/game.ts -> game-engines/word-groups/types.ts
- src/app/page.tsx + components -> game-engines/word-groups/WordGroupsGame.tsx

Modifications:
- Replaced hardcoded puzzle data with fetch-based daily JSON loading from public/data/word-groups/.
- Replaced random category selection with deterministic UTC dateKey-based puzzle selection.
- Added localStorage progress persistence (found categories, mistakes, phase).
- Replaced CDN animate.css link with project-local CSS; removed all debug console.log calls.
- Removed "Tech Connections" branding and all NYT-derived naming.
- Integrated project's shared lib/stats and lib/analytics framework.
- Added accessible ARIA labels throughout; full keyboard navigation.

MIT License

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.

Daily Memory Table game state and grid logic are adapted from:

Project: emanuelecaurio/react-card-memory-game
Repository: https://github.com/emanuelecaurio/react-card-memory-game
Fixed commit: f08a45a55dd0665639a986d25112f8b57d26e85e
License: MIT
Copyright (c) 2022 Emanuele Caurio

Upstream files adapted:
- src/MemoryGame.tsx (cardStatuses array, click guards, match-checker useEffect,
  win-detector useEffect, result callback structure)
- src/consts.tsx (cardStatuses object, symbol pool concept)
- src/getGeneratedGrid.ts (pool shuffle, pair expansion, grid re-shuffle)
- src/shuffleArray.ts (Fisher-Yates approach, seeded RNG substituted)
- src/AllEqual.ts (win-detection one-liner, renamed allEqual.ts)

Source-to-current mapping:
- src/MemoryGame.tsx -> game-engines/memory/MemoryGame.tsx
- src/consts.tsx -> game-engines/memory/consts.ts
- src/getGeneratedGrid.ts -> game-engines/memory/getGeneratedGrid.ts
- src/shuffleArray.ts -> game-engines/memory/shuffleArray.ts
- src/AllEqual.ts -> game-engines/memory/allEqual.ts

New files (not in upstream):
- game-engines/memory/Card.tsx (CSS 3D flip card replacing reactjs-flip-card)
- game-engines/memory/useTimer.ts (setInterval elapsed timer)

Modifications:
- Removed reactjs-flip-card dependency; replaced with local Card.tsx using
  CSS transform: rotateY(180deg) + transform-style: preserve-3d.
- Substituted Math.random() with makeSeededRng(getDailySeed(dateKey, slug))
  for UTC daily deterministic grid generation.
- Added stale-closure guards (statusesRef, firstClickedRef) for timeout callbacks.
- Added moves counter and useTimer hook for elapsed tracking.
- Added localStorage progress save/restore (completed, moves, elapsed).
- Integrated project's shared completeGame, trackEvent, createGameCompleteEvent.
- Replaced upstream emoji pool with a 20-symbol pool; 8 symbols selected daily by seed.
- Adapted to TypeScript strict mode and static-export constraints.

MIT License

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.

Daily Flag Quiz country flag SVGs are adapted from:

Project: flag-icons
Repository: https://github.com/lipis/flag-icons
Pinned version: 7.5.0 (npm, devDependency)
License: MIT
Copyright (c) 2013 Panayiotis Lipiridis

Upstream files adapted:
- flags/4x3/*.svg (the 60 ISO 3166-1 alpha-2 codes listed in data/trivia/capitals.json)

Source-to-current mapping:
- node_modules/flag-icons/flags/4x3/<code>.svg -> public/flags/<code>.svg
  (copied at build time by scripts/copy-flags.js, run from predev/prebuild)

Modifications:
- None to the artwork: each SVG is copied byte-for-byte, unminified and unrecoloured.
- Only the 60 countries used by Daily Flag Quiz are copied; the remaining ~210 flags
  and the package's CSS/Sass sprite layers are not shipped.
- Served as plain static files under /flags/ instead of via the upstream CSS classes,
  so the static export carries no flag-icons stylesheet or JavaScript.

MIT License

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.