refactor!: transition tools to MIT default with GPL checker exception

.github/workflows/check.yml

@@ -21,15 +21,14 @@ jobs:
       - name: Validate Python syntax
         run: python3 -W error -m compileall -q -f .
 
+      - name: Validate diagnostic utilities
+        run: |
+          python3 -m unittest discover -s tests -v
+          shellcheck split_symbols.sh
+
       - name: Validate map checker catalog integration
         run: |
           python3 -m unittest discover -s map-checker-qt/tests -v
           python3 map-checker-qt/dependencies.py validate
           python3 map-checker-qt/dependencies.py sync
           python3 map-checker-qt/dependencies.py verify
-
-      - name: Build randomizer
-        run: |
-          mkdir -p build
-          cc -std=gnu99 -Wall -Wextra -Werror \
-            -o build/randomizer randomizer/randomizer.c

AGENTS.md

@@ -17,21 +17,12 @@
 - New Python work must document its supported runtime and dependencies. Do not
   duplicate client/server command IDs in packet-aware tools; consume a released
   protocol binding when such tooling becomes maintained here.
-- Source in this repository remains GPL as distributed under `COPYING`. That
-  is not a blanket outbound reuse ban. Under the
-  [canonical provenance policy](https://github.com/atrinik/atrinik/blob/main/docs/PROVENANCE.md),
-  an MIT destination may inspect exact, independently separable material as
-  source reference, copy it, migrate or port it, translate or adapt it, or
-  relicense it only after a complete audit proves each selected contribution
-  is the applicable named grantor's original work. Each contribution must be
-  solely authored by that grantor and fall within the row's temporal scope.
-  Distinct contributions may cite different rows only when each independently
-  satisfies one row. Rows cannot be combined to cover jointly authored
-  contributions, generated output, or inseparable mixed work. Later material
-  needs contemporaneous compatible permission. The grants authorize only
-  proven destination use. They neither change this repository's source license
-  nor by themselves approve a GPL dependency, linked or combined binary,
-  bundle, or surrounding material.
+- Source is MIT by default under root `LICENSE`. The complete
+  `map-checker-qt/` subtree remains GPL-2.0-or-later under its own `LICENSE`,
+  including generated PyQt files, tests, configuration, launchers, and docs.
+  Never move or copy material across that boundary without a complete
+  provenance and license review. Preserve the separate PyQt5 and downloaded
+  content-catalog dependency terms.
 - Autonomous gameplay testing belongs in the independent
   [`atrinik/playtester`](https://github.com/atrinik/playtester) repository; do
   not add bot implementation or mutable bot state here.

CONTRIBUTING.md

@@ -5,19 +5,12 @@ for each changed utility. Keep component-specific build tooling in its owning
 repository, consume the released protocol package for packet-aware Python
 tools, and keep autonomous gameplay testing in the independent
 [`atrinik/playtester`](https://github.com/atrinik/playtester) repository.
-Preserve the GNU General Public License terms in `COPYING`. A new, independently
-authored utility may use the MIT License when feasible, but it must carry a
-clearly scoped license. Existing source remains GPL as distributed; that is not
-a blanket outbound reuse ban. Exact, independently separable material may be
-inspected as source reference, copied, migrated or ported, translated or
-adapted, or relicensed in an MIT destination only after the
-[canonical provenance audit](https://github.com/atrinik/atrinik/blob/main/docs/PROVENANCE.md)
-proves each selected contribution is the applicable named grantor's original
-work. Each contribution must be solely authored by that grantor and fall within
-the row's temporal scope. Distinct contributions may cite different rows only
-when each independently satisfies one row. Rows cannot be combined to cover
-jointly authored contributions, generated output, or inseparable mixed work.
-Later material needs contemporaneous compatible permission. The grants
-authorize only proven destination use. They neither change this repository's
-source license nor by themselves approve a GPL dependency, linked or combined
-binary, bundle, or surrounding material.
+
+Contributions are MIT by default under root `LICENSE`. The complete
+`map-checker-qt/` subtree is the sole GPL-2.0-or-later exception under
+`map-checker-qt/LICENSE`; preserve that scope for its source, generated PyQt
+files, tests, configuration, launchers, and documentation. Do not move material
+across that boundary without a complete provenance and license review. Keep
+PyQt5 and downloaded catalog dependencies under their own terms, and update
+`PROVENANCE.md` whenever the current-tree rights basis or dependency boundary
+changes.

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Zoey Rose
+
+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.