Checkpoint web parity through Chromium input tasks

tools/web/generate-io-format-capability-matrix.mjs

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+import crypto from "node:crypto";
+import fs from "node:fs";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+const repoRoot = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "../..");
+const inventoryPath = path.join(repoRoot, "tests/golden/M12-05A/format-inventory.json");
+const outputArgument = process.argv.indexOf("--output");
+const outputPath = outputArgument === -1
+  ? path.join(repoRoot, "tests/golden/M12-05B/capability-matrix.json")
+  : path.resolve(process.argv[outputArgument + 1] ?? "");
+if (!outputPath) throw new Error("--output requires a file");
+
+const inventoryBytes = fs.readFileSync(inventoryPath);
+const inventory = JSON.parse(inventoryBytes);
+const runtimeInventorySha256 = crypto.createHash("sha256").update(inventoryBytes).digest("hex");
+const formatOrder = ["GLTF", "GLB", "OBJ", "STL", "PLY", "USD", "ALEMBIC"];
+
+const blocked = (code = "IO_FORMAT_UNSUPPORTED") => ({ status: "BLOCKED", execution: "NONE", code });
+const feature = (status, evidence) => ({ status, evidence });
+const operation = (format, name) => {
+  const glbExport = format === "GLB" && name === "EXPORT";
+  const bounded = glbExport
+    ? feature("PARTIAL", "bounded GLB export gate exists; full format round-trip remains M12-06")
+    : feature("UNVERIFIED", "no verified Web executor for this format/operation");
+  return {
+    local: glbExport ? { status: "READY", execution: "LOCAL", code: null } : blocked(),
+    server: blocked(),
+    geometry: bounded,
+    material: bounded,
+    animation: bounded,
+  };
+};
+
+const byFormat = new Map(inventory.formats.map((entry) => [entry.format, entry]));
+const formats = formatOrder.map((format) => {
+  const runtime = byFormat.get(format);
+  if (!runtime) throw new Error(`inventory is missing ${format}`);
+  return {
+    format,
+    runtimeImportStatus: runtime.import.runtimeStatus === "AVAILABLE" ? "AVAILABLE" : "OPERATOR_UNREGISTERED",
+    runtimeExportStatus: runtime.export.runtimeStatus === "AVAILABLE" ? "AVAILABLE" : "OPERATOR_UNREGISTERED",
+    operations: { IMPORT: operation(format, "IMPORT"), EXPORT: operation(format, "EXPORT") },
+  };
+});
+
+const matrix = { schemaVersion: 1, task: "M12-05B", runtimeInventorySha256, formats };
+fs.mkdirSync(path.dirname(outputPath), { recursive: true });
+fs.writeFileSync(outputPath, `${JSON.stringify(matrix, null, 2)}\n`);
+process.stdout.write(`io-format-capability-matrix-generated formats=${formats.length} output=${outputPath}\n`);