fix(cua): preserve the installed PTC bridge initialization path

packages/experimental/cua-macos/tests/persistent-bridge.built.e2e.ts

@@ -4,7 +4,7 @@ import { existsSync } from 'node:fs'
 import { mkdtemp, rm } from 'node:fs/promises'
 import { tmpdir } from 'node:os'
 import { dirname, join } from 'node:path'
-import { fileURLToPath, pathToFileURL } from 'node:url'
+import { fileURLToPath } from 'node:url'
 import { Context } from '@deepseek-ai/cordis'
 import Loader from '@deepseek-ai/cordis-plugin-loader'
 import { mountAgentLoopTestDependencies, mountAgentLoopTestHarness } from '@deepseek-ai/dsh-agent-loop-testkit'
@@ -71,7 +71,9 @@ it.skipIf(process.platform === 'win32' || !existsSync(bridge) || !existsSync(boo
         } } }],
       }))
       expect((await run('await import("@deepseek-ai/dsh-cua/bridge")', 'unresolved')).error?.message).toContain('Cannot find package')
-      const initialization = `var { connectCua } = await import(${JSON.stringify(pathToFileURL(bridge).href)});\nvar cua = connectCua(() => tools.cua, text => console.log(text));`
+      const section = (await ctx.systemPrompt.assemble()).sections.find(value => value.name === 'computer-use:dsh-cua')
+      const initialization = section?.text.match(/Persistent PTC initialization:\n\n```ts\n([\s\S]*?)\n```/u)?.[1]
+      expect(initialization).toContain('/lib/bridge.js')
       const first = await run(`${initialization}\nvar app = await cua.getApp("test.fixture"); var win = await app.getWindow(7); await win.click("0"); var shot = await win.getScreenshot(); ({ mimeType: shot.mimeType, pixelWidth: shot.pixelWidth, pixelHeight: shot.pixelHeight, windowId: shot.windowId, byteLength: shot.bytes.length });`, 'first')
       expect(first.error).toBeUndefined()
       expect(first.value).toEqual({ mimeType: 'image/png', pixelWidth: 1, pixelHeight: 1, windowId: 7, byteLength: 90 })

packages/experimental/cua-macos/tests/provider-lifecycle.spec.ts

@@ -901,7 +901,7 @@ it('adds an installation-owned bridge URL when persistent PTC is available', asy
   await f.ctx.plugin(Sandbox)
   await f.ctx.plugin(SandboxPolicy)
   await f.ctx.plugin(NodeRuntime, { executionMode: 'persistent-in-memory' })
-  expect(await text()).toContain(new URL('../../cua/src/bridge.ts', import.meta.url).href)
+  expect(await text()).toContain(new URL('../../cua/lib/bridge.js', import.meta.url).href)
 })
 
 it('keeps Cordis loading until preparation succeeds and reports preparation failure through the fiber', async () => {

packages/experimental/cua/src/tool-registration.ts

@@ -28,7 +28,9 @@ const programDescription = 'Run a TypeScript program to observe and operate desk
 export function installCuaTools(
   ctx: Context, config: CuaConfig, tool: ToolDefinition, guidance: string, programGuidance: string,
 ): () => void | Promise<void> {
-  const bridgeUrl = JSON.stringify(new URL(`./bridge${extname(new URL(import.meta.url).pathname)}`, import.meta.url).href)
+  // PTC publishes the installed JS entry; automatic CUA initialization follows the Host's code format.
+  const ptcBridgeUrl = JSON.stringify(new URL('../lib/bridge.js', import.meta.url).href)
+  const programBridgeUrl = JSON.stringify(new URL(`./bridge${extname(new URL(import.meta.url).pathname)}`, import.meta.url).href)
   const prompt = { name: 'computer-use:dsh-cua', order: ctx.systemPrompt.getSectionOrder('TOOL_COMPUTER_USE') }
   const rawPrompt: PromptSection = { ...prompt, text: () => {
     const runtime = ctx.get('ptcRuntime')
@@ -37,7 +39,7 @@ export function installCuaTools(
 Persistent PTC initialization:
 
 \`\`\`ts
-var { connectCua } = await import(${bridgeUrl});
+var { connectCua } = await import(${ptcBridgeUrl});
 var cua = connectCua(() => tools.cua, text => console.log(text));
 \`\`\``
   } }
@@ -59,7 +61,7 @@ var cua = connectCua(() => tools.cua, text => console.log(text));
         const program = createRunCodeTool(consumer, {
           name: 'cua_run_code', description: programDescription, runtime: consumer.ptcRuntime,
           tools: [tool], limits: config.runCode.executor,
-          initialization: `globalThis.cua ??= (await import(${bridgeUrl})).connectCua(() => tools.cua, text => console.log(text));`,
+          initialization: `globalThis.cua ??= (await import(${programBridgeUrl})).connectCua(() => tools.cua, text => console.log(text));`,
         })
         const scopes = new Map<Agent, { scope: Scope; current?: { kind: 'raw' | 'program'; remove: () => void } }>()
         consumer.effect(() => async () => {

snapshots/session/ptc-script-retained/system-prompt.expected.md

@@ -92,7 +92,7 @@ Maximum click holdMs: 5000 ms.
 Persistent PTC initialization:
 
 ```ts
-var { connectCua } = await import("file://{{cwd}}/cua-runtime/src/bridge.ts");
+var { connectCua } = await import("file://{{cwd}}/cua-runtime/lib/bridge.js");
 var cua = connectCua(() => tools.cua, text => console.log(text));
 ```