First implementation (#1)

Reviewed-on: #1

LICENSE.md

@@ -0,0 +1,17 @@
+# Licenses
+
+| Paths | License | SPDX |
+| --- | --- | --- |
+| `spec/`, `docs/`, `README.md`, `CONTRIBUTING.md`, `CHANGELOG.md` and the other prose | Creative Commons Attribution 4.0 International | `CC-BY-4.0` |
+| `schemas/`, `sql/`, `context/`, `registry/`, `vectors/`, `fixtures/` | Creative Commons Zero 1.0 Universal | `CC0-1.0` |
+| `tools/` | Apache License 2.0 | `Apache-2.0` |
+
+The legal texts are at <https://creativecommons.org/licenses/by/4.0/legalcode>, <https://creativecommons.org/publicdomain/zero/1.0/legalcode> and <https://www.apache.org/licenses/LICENSE-2.0>.
+
+The formats are open so that anyone may implement them, in any product, without asking.
+
+All text in the fixtures is synthetic, written for them.
+License fields inside fixtures describe fictional works, not the fixtures.
+The keys in `fixtures/keys/` are public test keys and must never sign anything else.
+
+Copyright 2026 the Scientific Computing Studio.