Fix supervised credentials and declare typed RPC records for canvas placement

test/capability-language.test.ts

@@ -13,6 +13,17 @@ import {
   fixtureId,
 } from "./fixtures/capability-model.js";
 
+test("RPC record fields retain declared reference targets and reject duplicate fields", () => {
+  const compile = (fields: string) => compileCapabilityResourceSource(`
+external atom Board id "atom:board";
+package Runtime id "package:runtime" revision "package:runtime@1" {
+  function move id "export:move" : record { ${fields} } -> unit;
+}`, {source: {repository: "https://example.test/runtime.git", commit: "a".repeat(40)}});
+  const result = compile("board: atom-ref<Board>; position: record { x: double; y: double; }; note: optional<string>;");
+  assert.equal(result.ok, true, JSON.stringify(result.diagnostics));
+  assert.equal(compile("board: atom-ref<Board>; board: string;").ok, false);
+});
+
 const compileWebStudioFixture = (packageTransform = (source: string) => source) => {
   const fixture = (name: string) => readFileSync(
     resolve(process.cwd(), "test/fixtures", name),