diff --git a/.changeset/nitro-dashboard-route.md b/.changeset/nitro-dashboard-route.md
new file mode 100644
index 0000000000..1d8ef64a01
--- /dev/null
+++ b/.changeset/nitro-dashboard-route.md
@@ -0,0 +1,5 @@
+---
+'@workflow/nitro': minor
+---
+
+Add `/_workflow` route in dev mode that opens the workflow observability dashboard.
diff --git a/packages/nitro/package.json b/packages/nitro/package.json
index ed9782b491..fa9190425c 100644
--- a/packages/nitro/package.json
+++ b/packages/nitro/package.json
@@ -32,6 +32,7 @@
     "@workflow/rollup": "workspace:*",
     "@workflow/swc-plugin": "workspace:*",
     "@workflow/vite": "workspace:*",
+    "@workflow/web": "workspace:*",
     "exsolve": "1.0.8",
     "pathe": "2.0.3"
   },
diff --git a/packages/nitro/src/index.ts b/packages/nitro/src/index.ts
index b010247451..3d2989bf46 100644
--- a/packages/nitro/src/index.ts
+++ b/packages/nitro/src/index.ts
@@ -1,5 +1,6 @@
+import { createRequire } from 'node:module';
 import { mkdirSync, readFileSync, writeFileSync } from 'node:fs';
-import { fileURLToPath } from 'node:url';
+import { fileURLToPath, pathToFileURL } from 'node:url';
 import { WORKFLOW_QUEUE_TRIGGER } from '@workflow/builders';
 import { workflowTransformPlugin } from '@workflow/rollup';
 import type { Nitro, NitroModule, RollupConfig } from 'nitro/types';
@@ -114,7 +115,7 @@ export default {
                 // so we don't intercept the rest of the resolution chain.
                 const isWorkflowPkg =
                   /^@?workflow(\/|$)/.test(source) ||
-                  /[\\/]packages[\\/](workflow|core|serde|errors|utils|builders|rollup|ai|world|world-local|world-vercel|world-postgres|world-testing|cli|next|nitro|nuxt|vite|vitest|web|web-shared|astro|sveltekit|nest)[\\/]/.test(
+                  /[\\/]packages[\\/](workflow|core|serde|errors|utils|builders|rollup|ai|world|world-local|world-vercel|world-postgres|world-testing|cli|next|nitro|nuxt|vite|vitest|astro|sveltekit|nest)[\\/]/.test(
                     source
                   );
                 if (!isWorkflowPkg) return null;
@@ -209,6 +210,10 @@ export default {
         });
       }
 
+      if (nitro.options.dev) {
+        addDashboardHandler(nitro);
+      }
+
       addVirtualHandler(
         nitro,
         '/.well-known/workflow/v1/webhook/:token',
@@ -287,6 +292,74 @@ export default {
   },
 } satisfies NitroModule;
 
+const DASHBOARD_VIRTUAL_ID = '#workflow/dashboard-handler';
+
+function addDashboardHandler(nitro: Nitro) {
+  const route = '/_workflow';
+  nitro.options.handlers.push({ route, handler: DASHBOARD_VIRTUAL_ID });
+
+  // Resolve `@workflow/web/server` relative to this module so consumers don't
+  // need a direct dependency on `@workflow/web`. The path is inlined into the
+  // virtual handler as a file:// URL so Node can `import()` it at runtime
+  // regardless of where the generated Nitro bundle ends up.
+  const require_ = createRequire(import.meta.url);
+  let webServerUrl: string;
+  try {
+    webServerUrl = pathToFileURL(require_.resolve('@workflow/web/server')).href;
+  } catch {
+    webServerUrl = '@workflow/web/server';
+  }
+
+  const handlerSource = /* js */ `
+    const __workflowWebServerUrl = ${JSON.stringify(webServerUrl)};
+    let serverPromise = null;
+    async function getDashboardUrl() {
+      if (!serverPromise) {
+        serverPromise = (async () => {
+          const { startServer } = await import(/* @vite-ignore */ /* webpackIgnore: true */ __workflowWebServerUrl);
+          const server = await startServer(0);
+          const address = server.address();
+          const port = typeof address === 'object' && address ? address.port : 3456;
+          return 'http://localhost:' + port;
+        })().catch((error) => {
+          serverPromise = null;
+          throw error;
+        });
+      }
+      return serverPromise;
+    }
+  `;
+
+  if (!nitro.routing) {
+    nitro.options.virtual[DASHBOARD_VIRTUAL_ID] = /* js */ `
+      import { fromWebHandler } from "h3";
+      ${handlerSource}
+      export default fromWebHandler(async () => {
+        try {
+          const url = await getDashboardUrl();
+          return Response.redirect(url, 302);
+        } catch (error) {
+          console.error('Failed to start workflow dashboard:', error);
+          return new Response('Failed to start workflow dashboard: ' + error.message, { status: 500 });
+        }
+      });
+    `;
+  } else {
+    nitro.options.virtual[DASHBOARD_VIRTUAL_ID] = /* js */ `
+      ${handlerSource}
+      export default async () => {
+        try {
+          const url = await getDashboardUrl();
+          return Response.redirect(url, 302);
+        } catch (error) {
+          console.error('Failed to start workflow dashboard:', error);
+          return new Response('Failed to start workflow dashboard: ' + error.message, { status: 500 });
+        }
+      };
+    `;
+  }
+}
+
 function addVirtualHandler(nitro: Nitro, route: string, buildPath: string) {
   nitro.options.handlers.push({
     route,
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index a32d75e3a8..1d2ca2743a 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -797,6 +797,9 @@ importers:
       '@workflow/vite':
         specifier: workspace:*
         version: link:../vite
+      '@workflow/web':
+        specifier: workspace:*
+        version: link:../web
       exsolve:
         specifier: 1.0.8
         version: 1.0.8