UsefulSoftwareCo
diff --git a/‎.github/workflows/ci.yml‎
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diff --git a/‎apps/cloud/executor.config.ts‎
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diff --git a/‎apps/cloud/src/engine/execution-stack.ts‎
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diff --git a/‎apps/cloud/src/mcp/agent-handler.ts‎
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diff --git a/‎apps/cloud/src/routeTree.gen.ts‎
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diff --git a/‎apps/cloud/src/server.ts‎
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diff --git a/‎apps/host-cloudflare/src/execution.ts‎
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diff --git a/‎apps/host-cloudflare/src/plugins.ts‎
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diff --git a/‎apps/host-selfhost/executor.config.ts‎
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diff --git a/‎apps/host-selfhost/src/execution.ts‎
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@@ -74,12 +74,77 @@ jobs:
 
       - run: bun run test
 
+  e2e:
+    name: E2E (${{ matrix.target }}${{ matrix['shard-name'] && format(' {0}', matrix['shard-name']) || '' }})
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          # Cloud is SHARDED: each shard boots its own fresh dev stack. The
+          # cloud dev server degrades after a few minutes of sustained suite
+          # load on 2-core runners (the SSE/OTel memory growth being
+          # instrumented on main) — requests start failing partway through and
+          # everything after dies with connection errors. Short shards on
+          # fresh boots stay under that threshold; re-merge into fewer jobs
+          # once the degradation is fixed.
+          - { target: cloud, shard: 1/8, shard-name: 1of8 }
+          - { target: cloud, shard: 2/8, shard-name: 2of8 }
+          - { target: cloud, shard: 3/8, shard-name: 3of8 }
+          - { target: cloud, shard: 4/8, shard-name: 4of8 }
+          - { target: cloud, shard: 5/8, shard-name: 5of8 }
+          - { target: cloud, shard: 6/8, shard-name: 6of8 }
+          - { target: cloud, shard: 7/8, shard-name: 7of8 }
+          - { target: cloud, shard: 8/8, shard-name: 8of8 }
+          - target: selfhost
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: 1.3.11
+
+      # The dev stacks spawn Node sidecars (vite/workerd tooling); pin the
+      # same known-good runtime the unit-test job uses.
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
+      - run: bun install --frozen-lockfile
+
+      # Install from e2e so bunx resolves ITS pinned playwright (the version
+      # the tests run against) rather than floating to the latest.
+      - name: Install Playwright Chromium
+        run: bunx playwright install --with-deps chromium chromium-headless-shell
+        working-directory: e2e
+
+      # The globalsetup boots the target's own dev server (ports are claimed
+      # per checkout, so this is hermetic) and tears it down after the run.
+      # --retry=2: browser scenarios time out sporadically on 2-core runners
+      # (single-test waitFor timeouts, not systemic failures); a retry on the
+      # same booted stack clears them.
+      - name: Run ${{ matrix.target }} scenarios
+        run: bunx vitest run --project ${{ matrix.target }} --retry=2 ${{ matrix.shard && format('--shard={0}', matrix.shard) || '' }}
+        working-directory: e2e
+
+      # Failed runs keep their trace.zip / session.mp4 / step screenshots in
+      # runs/<target>/<slug>/ — surface them instead of a bare red X.
+      - name: Upload run artifacts
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: e2e-runs-${{ matrix.target }}${{ matrix['shard-name'] && format('-{0}', matrix['shard-name']) || '' }}
+          path: e2e/runs/
+          retention-days: 7
+
   e2e-local:
     name: E2E (stdio MCP)
     # Skipped on pull_request: the local scenario boots a real `executor web`
     # plus a browser and is currently flaky on PRs. Still runs on push to main.
     if: github.event_name != 'pull_request'
     runs-on: ubuntu-latest
+    timeout-minutes: 20
     steps:
       - uses: actions/checkout@v4
 
 
@@ -42,14 +42,23 @@ interface CloudPluginDeps {
    *  falls back to the credential-driven default. */
   readonly workosVaultClient?: WorkOSVaultClient;
   readonly activeToolkitSlug?: string;
+  /** Mirrors `HostConfig.allowLocalNetwork` (`ALLOW_LOCAL_NETWORK`): lets
+   *  `microsoft.addGraph` point at a loopback emulator instead of the pinned
+   *  Microsoft Graph URLs. Off by default; production leaves it unset. */
+  readonly allowLocalNetwork?: boolean;
 }
 
 export default defineExecutorConfig({
-  plugins: ({ workosCredentials, workosVaultClient, activeToolkitSlug }: CloudPluginDeps = {}) =>
+  plugins: ({
+    workosCredentials,
+    workosVaultClient,
+    activeToolkitSlug,
+    allowLocalNetwork,
+  }: CloudPluginDeps = {}) =>
     [
       openApiHttpPlugin(),
       googleHttpPlugin(),
-      microsoftHttpPlugin(),
+      microsoftHttpPlugin({ allowUnsafeUrlOverrides: allowLocalNetwork === true }),
       mcpHttpPlugin({
         dangerouslyAllowStdioMCP: false,
       }),
 
@@ -66,6 +66,7 @@ export const CloudPluginsProvider: Layer.Layer<PluginsProvider> = Layer.succeed(
       },
       activeToolkitSlug:
         context?.mcpResource?.kind === "toolkit" ? context.mcpResource.slug : undefined,
+      allowLocalNetwork: env.ALLOW_LOCAL_NETWORK === "true",
     }),
 });
 
 
@@ -112,13 +112,29 @@ const propsForPrincipal = (
   });
 
 export const makeCloudMcpAgentHandler = () => {
-  const serve = McpSessionDOSqlite.serve("/mcp", {
-    binding: "MCP_SESSION",
-    transport: "streamable-http",
-  });
+  const serveOptions = { binding: "MCP_SESSION", transport: "streamable-http" } as const;
+  // The agents SDK builds an exact-match `URLPattern` from the path handed to
+  // `serve` (see `createStreamingHttpHandler` in `agents/dist/mcp/index.js`) —
+  // a single `/mcp` handler never matches `/mcp/toolkits/<slug>` and falls
+  // through to its own internal 404. A second `serve` mounted on the
+  // parameterized path picks it up (`URLPattern` supports `:slug` segments);
+  // the auth/ownership/props logic above is unchanged and shared, only the
+  // final dispatch target differs.
+  const serve = McpSessionDOSqlite.serve("/mcp", serveOptions);
+  const serveToolkit = McpSessionDOSqlite.serve("/mcp/toolkits/:slug", serveOptions);
+
+  const ALLOWED_METHODS = new Set(["GET", "POST", "DELETE", "OPTIONS"]);
 
   return async (request: Request, env: Env, ctx: ExecutionContext): Promise<Response> => {
     if (request.method === "OPTIONS") return corsPreflightResponse();
+    // The old envelope (packages/hosts/mcp/src/envelope.ts) answered anything
+    // outside GET/POST/DELETE/OPTIONS with a JSON-RPC 405; the agents SDK
+    // handler only understands its own transport verbs and falls through to
+    // a bare 404. Reject before authenticating so PUT/PATCH/etc never reach
+    // the session engine.
+    if (!ALLOWED_METHODS.has(request.method)) {
+      return jsonRpcResponse(405, -32001, "Method not allowed");
+    }
     const sessionId = request.headers.get("mcp-session-id");
 
     const { auth, outcome } = await Effect.runPromise(authenticate(request));
@@ -132,7 +148,10 @@ export const makeCloudMcpAgentHandler = () => {
     }
 
     if (!sessionId && request.method === "DELETE") {
-      return new Response(null, { status: 204, headers: { "access-control-allow-origin": "*" } });
+      // Matches the old envelope's contract (@modelcontextprotocol/sdk's
+      // `WebStandardStreamableHTTPServerTransport.handleDeleteRequest`): 200,
+      // not 204 — see e2e/cloud/mcp-protocol.test.ts.
+      return new Response(null, { status: 200, headers: { "access-control-allow-origin": "*" } });
     }
 
     if (sessionId) {
@@ -159,7 +178,32 @@ export const makeCloudMcpAgentHandler = () => {
       },
       resource,
     );
-    const response = await serve.fetch(forwarded, env, ctx);
+    const target = resource.kind === "toolkit" ? serveToolkit : serve;
+    let response: Response;
+    // oxlint-disable-next-line executor/no-try-catch-or-throw -- adapter boundary: the agents SDK aborts the isolate (throws) instead of returning a response for a condemned session
+    try {
+      response = await target.fetch(forwarded, env, ctx);
+    } catch (error) {
+      // `_cf_scheduleDestroy` (called above via DELETE) marks the DO
+      // condemned and schedules its alarm; the alarm's `destroy()` then
+      // `ctx.abort("destroyed")`s the isolate. A request that lands after the
+      // alarm has already fired — same DO, same tick budget as the DELETE in
+      // tests — throws that abort reason out of `serve.fetch` instead of the
+      // DO ever getting to answer. Map it to the old envelope's reconnect
+      // error for a dead session (e2e/cloud/mcp-protocol.test.ts expects the
+      // client to be told to reconnect, matching a timed-out session).
+      // oxlint-disable-next-line executor/no-unknown-error-message -- adapter boundary: the abort reason is a plain runtime Error whose message IS the signal
+      if (Predicate.isError(error) && error.message === "destroyed") {
+        return jsonRpcResponse(404, -32001, "Session timed out, please reconnect");
+      }
+      // oxlint-disable-next-line executor/no-try-catch-or-throw -- adapter boundary: rethrow anything that isn't the condemned-DO abort to the Workers runtime unchanged
+      throw error;
+    }
+    // The agents SDK answers a bare DELETE with 204; the old envelope's
+    // contract (see above) was 200 — rewrite for consistency.
+    if (request.method === "DELETE" && response.status === 204) {
+      return new Response(null, { status: 200, headers: response.headers });
+    }
     return wrapMcpSseResponse(request, env, response);
   };
 };
@@ -411,15 +411,11 @@ export const routeTree = rootRouteImport
   ._addFileTypes<FileRouteTypes>()
 
 import type { getRouter } from './router.tsx'
-
 import type { startInstance } from './start.ts'
-
 declare module '@tanstack/react-start' {
   interface Register {
     ssr: true
-
     router: Awaited<ReturnType<typeof getRouter>>
-
     config: Awaited<ReturnType<typeof startInstance.getOptions>>
   }
 }
@@ -97,11 +97,14 @@ const cloudflareHandler: ExportedHandler<Env> = {
     // its own tracing for the same reason).
     const browserTraces = browserTracesResponse(request, env);
     if (browserTraces) return browserTraces;
-    if (!installTracerProvider()) {
-      return fetchHandler(request, env, ctx);
-    }
+    // The MCP dispatch is classified up front, independent of whether
+    // telemetry installs — an unset `AXIOM_TOKEN` (tracer not installed) must
+    // never take /mcp requests down with it. See `installTracerProvider`'s
+    // early return below: it only governs the tracing envelope for
+    // non-MCP paths.
     const url = new URL(request.url);
     const mcpRoute = classifyMcpPath(url.pathname);
+    const tracingInstalled = installTracerProvider();
     if (mcpRoute?.kind === "mcp") {
       // The Cloudflare Agents MCP bridge needs the platform ExecutionContext
       // to pass authenticated session props into the hibernatable DO.
@@ -110,9 +113,12 @@ const cloudflareHandler: ExportedHandler<Env> = {
       try {
         return await mcpAgentHandler(prepareMcpOrgScope(request), env, ctx);
       } finally {
-        ctx.waitUntil(flushTracerProvider());
+        if (tracingInstalled) ctx.waitUntil(flushTracerProvider());
       }
     }
+    if (!tracingInstalled) {
+      return fetchHandler(request, env, ctx);
+    }
     // Effect-served paths bring their own http.server span (with traceparent
     // join) — opening one here too would duplicate it. See the header note.
     if (isAppOwnedPath(url.pathname)) {
 
@@ -42,6 +42,7 @@ export const makeCloudflarePluginsProvider = (
       makeCloudflarePlugins(config.secretKey, {
         activeToolkitSlug:
           context?.mcpResource?.kind === "toolkit" ? context.mcpResource.slug : undefined,
+        allowLocalNetwork: config.allowLocalNetwork,
       }),
   });
 
 
@@ -19,12 +19,12 @@ import { toolkitsPlugin } from "@executor-js/plugin-toolkits/server";
 
 export const makeCloudflarePlugins = (
   secretKey: string,
-  options: { readonly activeToolkitSlug?: string } = {},
+  options: { readonly activeToolkitSlug?: string; readonly allowLocalNetwork?: boolean } = {},
 ) =>
   [
     openApiHttpPlugin(),
     googleHttpPlugin(),
-    microsoftHttpPlugin(),
+    microsoftHttpPlugin({ allowUnsafeUrlOverrides: options.allowLocalNetwork === true }),
     mcpHttpPlugin({ dangerouslyAllowStdioMCP: false }),
     graphqlHttpPlugin(),
     toolkitsPlugin({ activeToolkitSlug: options.activeToolkitSlug }),
 
@@ -19,12 +19,20 @@ import { resolveSecretKey } from "./src/config";
 // (slice 4) is added here as the first writable secret provider.
 // ---------------------------------------------------------------------------
 
+interface SelfHostPluginDeps {
+  readonly activeToolkitSlug?: string;
+  /** Mirrors `HostConfig.allowLocalNetwork` (EXECUTOR_ALLOW_LOCAL_NETWORK):
+   *  lets `microsoft.addGraph` point at a loopback emulator instead of the
+   *  pinned Microsoft Graph URLs. Off by default. */
+  readonly allowLocalNetwork?: boolean;
+}
+
 export default defineExecutorConfig({
-  plugins: ({ activeToolkitSlug }: { readonly activeToolkitSlug?: string } = {}) =>
+  plugins: ({ activeToolkitSlug, allowLocalNetwork }: SelfHostPluginDeps = {}) =>
     [
       openApiHttpPlugin(),
       googleHttpPlugin(),
-      microsoftHttpPlugin(),
+      microsoftHttpPlugin({ allowUnsafeUrlOverrides: allowLocalNetwork === true }),
       mcpHttpPlugin({ dangerouslyAllowStdioMCP: false }),
       graphqlHttpPlugin(),
       toolkitsPlugin({ activeToolkitSlug }),
 
@@ -44,6 +44,10 @@ export const SelfHostPluginsProvider: Layer.Layer<PluginsProvider> = Layer.succe
       executorConfig.plugins({
         activeToolkitSlug:
           context?.mcpResource?.kind === "toolkit" ? context.mcpResource.slug : undefined,
+        // Read the env directly (same computation as loadConfig().allowLocalNetwork):
+        // plugins() runs per request, and loadConfig does filesystem work
+        // (data dir, secret key) that must not ride the request path.
+        allowLocalNetwork: process.env.EXECUTOR_ALLOW_LOCAL_NETWORK === "true",
       }),
   },
 );