One React renderer, three runtime edges

import React from "react";
import ReactDOM from "react-dom/client";
import { createHashHistory, createBrowserHistory } from "@tanstack/react-router";
 
import "./index.css";
 
import { isElectron } from "./env";
import { hasCloudPublicConfig } from "./cloud/publicConfig";
import { getRouter } from "./router";
import {
  syncDocumentElectronPlatformClasses,
  syncDocumentWindowControlsOverlayClass,
} from "./lib/windowControlsOverlay";
import { AppRoot } from "./AppRoot";
import { clearChunkReloadGuard, reloadOnceForChunkLoadError } from "./lib/chunkReloadGuard";
 
// Electron loads the app from a file-backed shell, so hash history avoids path resolution issues.
const history = isElectron ? createHashHistory() : createBrowserHistory();
 
const router = getRouter(history);
 
if (isElectron) {
  syncDocumentElectronPlatformClasses(navigator.platform);
  syncDocumentWindowControlsOverlayClass();
}
 
const clerkPublishableKey = import.meta.env.VITE_CLERK_PUBLISHABLE_KEY as string | undefined;
 
// A failed split-chunk fetch usually means the hashed assets went stale under
// a deploy; one guarded reload picks up the fresh index.html.
let chunkLoadFailed = false;
let reloadScheduled = false;
window.addEventListener("vite:preloadError", (event) => {
  chunkLoadFailed = true;
  if (reloadOnceForChunkLoadError()) {
    reloadScheduled = true;
    event.preventDefault();
  }
});
 
const app = <AppRoot router={router} />;
 
// Managed auth is cloud-only, and the Electron Clerk provider bundles the full
// clerk-js runtime. Loading only the selected runtime as a split chunk keeps
// every Clerk byte out of the startup graph for local-mode users, and keeps
// the bundled clerk-js out of the browser build entirely.
const managedAuthShellModule =
  clerkPublishableKey && hasCloudPublicConfig()
    ? isElectron
      ? import("./components/clerk/ElectronManagedAuthShell")
      : import("./components/clerk/BrowserManagedAuthShell")
    : null;
 
// The index.html boot splash lives inside #root, and React's first commit
// clears it. Resolve everything that first commit needs, the selected
// managed-auth runtime and the initial route's split chunks, before
// rendering, so the splash holds until real UI paints instead of dropping to
// a blank window while chunks download.
export const startup = Promise.all([
  managedAuthShellModule?.then((module) => module.default) ?? null,
  router.load(),

import { RouterProvider } from "@tanstack/react-router";
 
import { ElectronBrowserHost } from "./browser/ElectronBrowserHost";
import { PreviewAutomationHosts } from "./components/preview/PreviewAutomationHosts";
import { QuitHoldOverlay } from "./components/QuitHoldOverlay";
import { AppAtomRegistryProvider } from "./rpc/atomRegistry";
import type { AppRouter } from "./router";
 
/**
 * Owns renderer-wide providers. The Electron browser host intentionally sits
 * outside the router so its webviews survive route transitions, but it must
 * share the same atom registry as routed UI.
 */
export function AppRoot({ router }: { readonly router: AppRouter }) {
  return (
    <AppAtomRegistryProvider>
      <RouterProvider router={router} />
      <PreviewAutomationHosts />
      <ElectronBrowserHost />
      <QuitHoldOverlay />
    </AppAtomRegistryProvider>
  );
}

import { createRouter, RouterHistory } from "@tanstack/react-router";
 
import { routeTree } from "./routeTree.gen";
 
export function getRouter(history: RouterHistory) {
  return createRouter({
    routeTree,
    history,
    context: {},
    // Route components are split chunks (autoCodeSplitting in vite.config);
    // fetching them on hover/focus intent hides the load from the first
    // settings or pull-request navigation.
    defaultPreload: "intent",
  });
}
 
export type AppRouter = ReturnType<typeof getRouter>;
 
declare module "@tanstack/react-router" {
  interface Register {

import { createEnvironmentCatalogAtoms } from "@t3tools/client-runtime/state/connections";
 
import { connectionAtomRuntime } from "./runtime";
 
export const environmentCatalog = createEnvironmentCatalogAtoms(connectionAtomRuntime);

import { connectionAtomRuntime } from "../connection/runtime";
import { appAtomRegistry } from "../rpc/atomRegistry";
 
export const environmentSession = createEnvironmentSessionAtoms(connectionAtomRuntime);
 
const EMPTY_PREPARED_CONNECTION_ATOM = Atom.make(Option.none()).pipe(
  Atom.withLabel("web-prepared-connection:empty"),
);
 
export function usePreparedConnection(environmentId: EnvironmentId | null) {
  return useAtomValue(
    environmentId === null
      ? EMPTY_PREPARED_CONNECTION_ATOM
      : environmentSession.preparedConnectionValueAtom(environmentId),
  );
}
 
export function readPreparedConnection(environmentId: EnvironmentId) {
  return Option.getOrNull(
    appAtomRegistry.get(environmentSession.preparedConnectionValueAtom(environmentId)),
  );
}
 
/**
 * This client's authenticated session on one environment, as reported by that
 * environment's `/api/auth/session` endpoint. `data` stays populated across
 * SWR revalidations; `isPending` is only meaningful before the first resolve.
 */
export function useEnvironmentSessionState(environmentId: EnvironmentId) {
  const result = useAtomValue(environmentSession.sessionStateAtom(environmentId));
  return {
    data: Option.getOrNull(AsyncResult.value(result)),
    hasError: result._tag === "Failure",
    isPending: result.waiting,
  };

    expandedTurnIds,
    expandedWorkGroupIds,
    isWorking,
    activeTurnStartedAt,
    turnDiffSummaries,
    supportsConversationRollback,
  ]);
  const rows = useStableRows(rawRows);
  const minimapItems = useMemo(() => deriveTimelineMinimapItems(rows), [rows]);
  const [timelineViewportElement, setTimelineViewportElement] = useState<HTMLDivElement | null>(
    null,
  );
  const {
    target: readyCitationRequest,
    positioning: citationPositioning,
    onListLoad: onCitationListLoad,
    alwaysRender: citationAlwaysRender,
  } = useAssistantCitationTarget({
    request: citationRequest,
    entries: timelineEntries,
    rows,
    listRef,
    viewport: timelineViewportElement,
    historyLoading: citationHistoryLoading,
    loadEarlier,
    onExpandTurn: expandCitedTurn,
    onManualNavigation,
  });
  const [minimapHasPersistentGutter, setMinimapHasPersistentGutter] = useState(false);
  const [minimapHitStripWidth, setMinimapHitStripWidth] = useState(0);
  const [minimapCurrentIndex, setMinimapCurrentIndex] = useState<number | null>(null);
  const handleAnchorReady = useCallback(
    (info: { anchorIndex: number | undefined }) => {
      if (anchorMessageId !== null && info.anchorIndex !== undefined) {
        onAnchorReady(anchorMessageId, info.anchorIndex);
      }
    },
    [anchorMessageId, onAnchorReady],
  );
  const anchoredEndSpace = useMemo(() => {
    const config = resolveChatListAnchoredEndSpace(
      rows,
      anchorMessageId,
      (row) => (row.kind === "message" && row.message.role === "user" ? row.message.id : null),
      { anchorOffset: CHAT_TIMELINE_ANCHOR_OFFSET },
    );
    return config ? { ...config, onReady: handleAnchorReady } : undefined;
  }, [anchorMessageId, handleAnchorReady, rows]);
  const timelineListFooter = useMemo(
    () => <TimelineListFooter composerInset={anchoredEndSpace ? 0 : contentInsetEndAdjustment} />,
    [anchoredEndSpace, contentInsetEndAdjustment],
  );
 
  const measureContentOverflow = useCallback(
    () =>
      timelineContentOverflowsViewport(listRef.current?.getState?.(), {
        composerInset: contentInsetEndAdjustment,
        anchorOffset: CHAT_TIMELINE_ANCHOR_OFFSET,
      }),
    [contentInsetEndAdjustment, listRef],
  );
  // LegendList lays rows out from layout effects, so a read on the next frame
  // sees the settled positions. One frame is shared across bursts of size
  // changes.
  const contentOverflowFrameRef = useRef<number | null>(null);
  const cancelContentOverflowFrame = useCallback(() => {
    if (contentOverflowFrameRef.current !== null) {
      cancelAnimationFrame(contentOverflowFrameRef.current);
      contentOverflowFrameRef.current = null;
    }
  }, []);
  const reportContentOverflow = useCallback(() => {
    if (!onContentOverflowChange || contentOverflowFrameRef.current !== null) return;
    contentOverflowFrameRef.current = requestAnimationFrame(() => {
      contentOverflowFrameRef.current = null;
      onContentOverflowChange(measureContentOverflow());
    });
  }, [measureContentOverflow, onContentOverflowChange]);
  useEffect(() => cancelContentOverflowFrame, [cancelContentOverflowFrame]);

    </span>
  );
}
 
const failedToolIconClassName = "text-tool-error-icon/40";
 
/** Image icons and the gradient computer-use mark cannot take a currentColor
 *  tint, so failed rows using them get a trailing x instead. */
function toolIconAcceptsTint(
  iconName: WorkEntryIconName,
  toolIcon: ToolActivityIcon | undefined,
): boolean {
  return toolIcon === undefined && iconName !== "computer";
}
 
function LiveActivityRow({
  label,
  iconName,
  toolIcon,

    onError: (error) => {
      toastManager.add(
        stackedThreadToast({
          type: "error",
          title: "Failed to copy thread ID",
          description: error instanceof Error ? error.message : "An error occurred.",
        }),
      );
    },
  });
  const newThreadContext = useHandleNewThread();
  const openAddProjectCommandPalette = useCallback(
    () => openCommandPalette({ open: "add-project" }),
    [],
  );
  const { environments } = useEnvironments();
  const primaryEnvironmentId = usePrimaryEnvironmentId();
  const clearSelection = useThreadSelectionStore((s) => s.clearSelection);
  const setSelectionAnchor = useThreadSelectionStore((s) => s.setAnchor);
  const toggleThreadSelection = useThreadSelectionStore((s) => s.toggleThread);
  const rangeSelectTo = useThreadSelectionStore((s) => s.rangeSelectTo);
  const markThreadUnread = useUiStateStore((s) => s.markThreadUnread);
  const markThreadVisited = useUiStateStore((s) => s.markThreadVisited);
  const acknowledgeWoke = useCallback(
    (threadRef: ScopedThreadRef, visitedAt: string) => {
      markThreadVisited(scopedThreadKey(threadRef), visitedAt);
    },
    [markThreadVisited],
  );
  const routeTarget = useParams({
    strict: false,
    select: (params) => resolveThreadRouteTarget(params),
  });
  const routeDraftThread = useComposerDraftStore((store) =>
    routeTarget?.kind === "draft" ? store.getDraftSession(routeTarget.draftId) : null,
  );
  const routeThreadRef = useMemo(
    () => resolveActiveThreadRouteRef(routeTarget, routeDraftThread),
    [routeDraftThread, routeTarget],
  );
  const routeThreadKey = routeThreadRef ? scopedThreadKey(routeThreadRef) : null;
  const routeTargetRef = useRef(routeTarget);
  routeTargetRef.current = routeTarget;
  // Post-settle navigation validates against the CURRENT route, not the one
  // captured when the settle started: if the user navigated elsewhere while
  // the command was in flight, completing it must not yank them away.
  const routeThreadKeyRef = useRef(routeThreadKey);
  routeThreadKeyRef.current = routeThreadKey;
 
  const environmentLabelById = useMemo(
    () =>
      new Map(
        environments.map((environment) => [environment.environmentId, environment.label] as const),

 
const DEFAULT_EXPORT_INTERVAL_MS = 1_000;
const CLIENT_TRACING_RESOURCE = {
  serviceName: "t3-web",
  attributes: {
    "service.runtime": "t3-web",
    "service.mode": isElectron ? "electron" : "browser",
    "service.version": APP_VERSION,
  },
} as const;
 
const delegateRuntimeLayer = Layer.mergeAll(
  primaryEnvironmentHttpLayer,
  OtlpExporter.layerFlusher,
  OtlpSerialization.layerJson,
  Layer.succeed(HttpClient.TracerDisabledWhen, () => true),
);
 
let activeDelegate: Tracer.Tracer | null = null;
let activeRuntime: ManagedRuntime.ManagedRuntime<never, never> | null = null;
let activeScope: Scope.Closeable | null = null;
let activeConfigKey: string | null = null;
let configurationGeneration = 0;
let pendingConfiguration = Promise.resolve();
 
export interface ClientTracingConfig {
  readonly exportIntervalMs?: number;
}
 
export function configureClientTracing(config: ClientTracingConfig = {}): Promise<void> {
  if (config.exportIntervalMs === undefined && activeConfigKey !== null) {
    return pendingConfiguration;
  }
  pendingConfiguration = pendingConfiguration.finally(() => applyClientTracingConfig(config));
  return pendingConfiguration;
}
 
async function applyClientTracingConfig(config: ClientTracingConfig): Promise<void> {
  const otlpTracesUrl = resolvePrimaryEnvironmentHttpUrl("/api/observability/v1/traces");
  const exportIntervalMs = Math.max(10, config.exportIntervalMs ?? DEFAULT_EXPORT_INTERVAL_MS);
  const nextConfigKey = `${otlpTracesUrl}|${exportIntervalMs}`;
 
  if (activeConfigKey === nextConfigKey && activeDelegate !== null) {
    return;
  }
 
  activeConfigKey = nextConfigKey;
  const generation = ++configurationGeneration;
 
  const previousRuntime = activeRuntime;
  const previousScope = activeScope;
 
  activeDelegate = null;
  activeRuntime = null;
  activeScope = null;
 
  await disposeTracerRuntime(previousRuntime, previousScope);
 
  const runtime = ManagedRuntime.make(delegateRuntimeLayer);
  const scope = runtime.runSync(Scope.make());
 
  const delegateResult = await settleAsyncResult(() =>
    runtime.runPromiseExit(
      Scope.provide(scope)(
        OtlpTracer.make({
          url: otlpTracesUrl,
          exportInterval: `${exportIntervalMs} millis`,
          resource: CLIENT_TRACING_RESOURCE,
        }),
      ),
    ),
  );
  if (delegateResult._tag === "Failure") {
    await disposeTracerRuntime(runtime, scope);
 
    if (generation === configurationGeneration) {
      const error = squashAtomCommandFailure(delegateResult);
      const tracesUrl = new URL(otlpTracesUrl);
      console.warn("Failed to configure client tracing exporter", {
        scheme: tracesUrl.protocol.replace(/:$/, ""),
        host: tracesUrl.hostname,
        port: tracesUrl.port || undefined,