fix stagehand timeout - send attachedToTarget after attachToTarget returns (0.0.16)

playwriter/CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.0.16
+
+### Patch Changes
+
+- **Fixed Stagehand timeout**: Send `Target.attachedToTarget` event after `Target.attachToTarget` returns
+  - Stagehand creates sessions from `attachToTarget` response, then expects `attachedToTarget` event to create Page
+  - Previously events were only sent from `setAutoAttach` which arrived before sessions were created
+
 ## 0.0.15
 
 ### Patch Changes

playwriter/package.json

@@ -1,7 +1,7 @@
 {
   "name": "playwriter",
   "description": "",
-  "version": "0.0.15",
+  "version": "0.0.16",
   "type": "module",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

playwriter/src/extension/cdp-relay.ts

@@ -351,7 +351,7 @@ export async function startPlayWriterCDPRelayServer({ port = 19988, host = '127.
             }
           }
 
-          if (method === 'Target.setDiscoverTargets' && (params)?.discover) {
+          if (method === 'Target.setDiscoverTargets' && (params as any)?.discover) {
             for (const target of connectedTargets.values()) {
               const targetCreatedPayload = {
                 method: 'Target.targetCreated',
@@ -371,6 +371,30 @@ export async function startPlayWriterCDPRelayServer({ port = 19988, host = '127.
             }
           }
 
+          if (method === 'Target.attachToTarget' && result?.sessionId) {
+            const targetId = params?.targetId
+            const target = Array.from(connectedTargets.values()).find(t => t.targetId === targetId)
+            if (target) {
+              const attachedPayload = {
+                method: 'Target.attachedToTarget',
+                params: {
+                  sessionId: result.sessionId,
+                  targetInfo: {
+                    ...target.targetInfo,
+                    attached: true
+                  },
+                  waitingForDebugger: false
+                }
+              } satisfies CDPEventFor<'Target.attachedToTarget'>
+              logger?.log(chalk.magenta('[Server] Target.attachedToTarget (from attachToTarget) payload:'), JSON.stringify(attachedPayload))
+              sendToPlaywright({
+                message: attachedPayload,
+                clientId,
+                source: 'server'
+              })
+            }
+          }
+
           sendToPlaywright({
             message: { id, sessionId, result },
             clientId

playwriter/src/mcp.test.ts

@@ -610,8 +610,8 @@ describe('MCP Server Tests', () => {
         expect(results).toMatchInlineSnapshot(`
           [
             {
-              "title": "🎄 Twelve Days of Shell 🎄",
-              "url": "https://12days.cmdchallenge.com/",
+              "title": "",
+              "url": "about:blank",
             },
             {
               "title": "Example Domain",
@@ -696,8 +696,8 @@ describe('MCP Server Tests', () => {
         expect(results).toMatchInlineSnapshot(`
           [
             {
-              "title": "🎄 Twelve Days of Shell 🎄",
-              "url": "https://12days.cmdchallenge.com/",
+              "title": "",
+              "url": "about:blank",
             },
             {
               "title": "Example Domain",