Complete worker ABI and validation coverage

- Align shared-buffer layouts and native worker declarations.
- Complete runtime link and worker lifecycle contracts.
- Check fixture baselines before running parity suites.

scripts/test-ts7.mjs

@@ -4,9 +4,28 @@ import { readdirSync, readFileSync } from "node:fs";
 import { dirname, relative, resolve } from "node:path";
 import { fileURLToPath } from "node:url";
 import { spawnSync } from "node:child_process";
+import { allOrderEntries } from "./ts7-order-fixtures.mjs";
 
 const repoRoot = resolve(dirname(fileURLToPath(import.meta.url)), "..");
 
+const baseline = JSON.parse(
+  readFileSync(resolve(repoRoot, "packages/compiler/test/ts7/baselines/order-parity.json"), "utf8"),
+);
+const missingBaselines = allOrderEntries(repoRoot)
+  .map((path) => relative(repoRoot, path).replaceAll("\\", "/"))
+  .filter((path) => !Object.hasOwn(baseline.entries, `<repo>/${path}`));
+if (missingBaselines.length > 0) {
+  console.error(`Missing TypeScript preflight/order baselines:\n${missingBaselines.join("\n")}`);
+  console.error(
+    "Record the new fixtures with SCRIPTC_UPDATE_BASELINES=1 pnpm exec vitest run packages/compiler/test/ts7/order-parity.test.ts, review the diff, then run the affected parity batches before opening a PR.",
+  );
+  process.exit(1);
+}
+if (process.argv.includes("--baselines-only")) {
+  console.log("Every TypeScript preflight/order fixture has a recorded baseline.");
+  process.exit(0);
+}
+
 const ALLOWED_TYPESCRIPT5_IMPORTS = new Set([
   "packages/compiler/src/frontend/comptime-node.ts",
   "packages/compiler/src/frontend/ts7/world-check.ts",

scripts/ts7-order-fixtures.mjs

@@ -0,0 +1,21 @@
+import { globSync } from "node:fs";
+import { join } from "node:path";
+
+export function orderEntriesUnder(repoRoot, dir) {
+  return ["ts", "js", "mjs", "cjs"]
+    .flatMap((ext) => [
+      ...globSync(join(repoRoot, dir, `*.${ext}`)),
+      ...globSync(join(repoRoot, dir, `*/main.${ext}`)),
+    ])
+    .sort();
+}
+
+export function allOrderEntries(repoRoot) {
+  return [
+    ...orderEntriesUnder(repoRoot, "tests/corpus"),
+    ...orderEntriesUnder(repoRoot, "tests/diagnostics"),
+    ...orderEntriesUnder(repoRoot, "tests/fixtures/npm/cases"),
+    ...globSync(join(repoRoot, "tests/fixtures/strictness/*/main.ts")).sort(),
+    ...globSync(join(repoRoot, "tests/fixtures/node-types/*.ts")).sort(),
+  ];
+}