Complete V1 RC deployment capability gates

web/app/src/platform/capabilities.ts

@@ -1,9 +1,15 @@
-export interface BrowserCapabilities {
+import { blockedGate, capabilityIssue, readyGate, type CapabilityGateResult } from "../../../protocol/capability-gates";
+
+export interface WasmThreadingCapabilities {
+  crossOriginIsolated: boolean;
+  sharedArrayBuffer: boolean;
+  worker: boolean;
+}
+
+export interface BrowserCapabilities extends WasmThreadingCapabilities {
   webgl2: boolean;
   offscreenCanvas: boolean;
   opfs: boolean;
-  sharedArrayBuffer: boolean;
-  worker: boolean;
   wasm: boolean;
   wasmSimd: boolean;
   wasmThreads: boolean;
@@ -11,6 +17,34 @@ export interface BrowserCapabilities {
   indexedDb: boolean;
 }
 
+export function gateWasmThreadingCapability(capabilities: WasmThreadingCapabilities): CapabilityGateResult {
+  const issues = [];
+  if (!capabilities.crossOriginIsolated) {
+    issues.push(capabilityIssue(
+      "PLATFORM_CAPABILITY_UNAVAILABLE",
+      "Cross-origin isolation is required for the pthread WASM engine",
+      "crossOriginIsolated",
+    ));
+  }
+  if (!capabilities.sharedArrayBuffer) {
+    issues.push(capabilityIssue(
+      "PLATFORM_CAPABILITY_UNAVAILABLE",
+      "SharedArrayBuffer is required for the pthread WASM engine",
+      "sharedArrayBuffer",
+    ));
+  }
+  if (!capabilities.worker) {
+    issues.push(capabilityIssue(
+      "PLATFORM_CAPABILITY_UNAVAILABLE",
+      "Worker is required for the pthread WASM engine",
+      "worker",
+    ));
+  }
+  return issues.length > 0
+    ? blockedGate("M6-02", "WASM_PTHREAD_ENGINE", issues)
+    : readyGate("M6-02", "WASM_PTHREAD_ENGINE");
+}
+
 function supportsWasmFeature(feature: "simd" | "threads"): boolean {
   if (typeof WebAssembly === "undefined") return false;
 
@@ -40,6 +74,7 @@ export function detectBrowserCapabilities(): BrowserCapabilities {
   const storage = typeof navigator === "undefined" ? undefined : navigator.storage;
 
   return {
+    crossOriginIsolated: globalThis.crossOriginIsolated === true,
     webgl2,
     offscreenCanvas: typeof OffscreenCanvas !== "undefined",
     opfs: Boolean(storage?.getDirectory),