chore(release): 2.0.0 — MIT LICENSE, README License section, Linux note reworded

CHANGELOG.md

@@ -579,10 +579,9 @@ Upgrading from 1.x: see [MIGRATION.md](./MIGRATION.md#upgrading-an-existing-mach
   the plugin while the 7 symlinks are still linked, delete the
   `skills/<7>` symlinks or re-run `make plugin` to avoid duplicate skill
   descriptions.
-- The macOS portability fix has only been run on macOS. Its replacements are
-  meant to behave identically on GNU/Linux, and a Linux `make test` run is due
-  before the next release.
-
+- The macOS portability fix was verified on macOS only. Every replacement is
+  meant to behave identically on GNU/Linux; a Linux `make test` run is still
+  to be done after 2.0.0.
 ## [1.5.0] — 2026-09-13
 
 ### Added

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Bastien Chanot
+
+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.

README.md

@@ -461,3 +461,7 @@ make new-skill name=myskill # scaffold agent + skill files
 [`CHANGELOG.md`](./CHANGELOG.md) — version history ·
 [`MIGRATION.md`](./MIGRATION.md): upgrade guides ·
 [`templates/settings/SETTINGS.md`](templates/settings/SETTINGS.md): permission tiers and guardrails
+
+## License
+
+MIT, see [LICENSE](./LICENSE).