fix: improve browser upload triggering

src/browser/client-actions-core.ts

@@ -93,6 +93,7 @@ export async function browserArmFileChooser(
   baseUrl: string,
   opts: {
     paths: string[];
+    ref?: string;
     targetId?: string;
     timeoutMs?: number;
   },
@@ -104,6 +105,7 @@ export async function browserArmFileChooser(
       headers: { "Content-Type": "application/json" },
       body: JSON.stringify({
         paths: opts.paths,
+        ref: opts.ref,
         targetId: opts.targetId,
         timeoutMs: opts.timeoutMs,
       }),

src/browser/pw-tools-core.ts

@@ -283,6 +283,20 @@ export async function armFileUploadViaPlaywright(opts: {
         return;
       }
       await fileChooser.setFiles(opts.paths);
+      try {
+        const input =
+          typeof fileChooser.element === "function"
+            ? await fileChooser.element()
+            : null;
+        if (input) {
+          await input.evaluate((el) => {
+            el.dispatchEvent(new Event("input", { bubbles: true }));
+            el.dispatchEvent(new Event("change", { bubbles: true }));
+          });
+        }
+      } catch {
+        // Best-effort for sites that don't react to setFiles alone.
+      }
     })
     .catch(() => {
       // Ignore timeouts; the chooser may never appear.

src/browser/routes/agent.ts

@@ -338,6 +338,7 @@ export function registerBrowserAgentRoutes(
   app.post("/hooks/file-chooser", async (req, res) => {
     const body = readBody(req);
     const targetId = toStringOrEmpty(body.targetId) || undefined;
+    const ref = toStringOrEmpty(body.ref) || undefined;
     const paths = toStringArray(body.paths) ?? [];
     const timeoutMs = toNumber(body.timeoutMs);
     if (!paths.length) return jsonError(res, 400, "paths are required");
@@ -351,6 +352,13 @@ export function registerBrowserAgentRoutes(
         paths,
         timeoutMs: timeoutMs ?? undefined,
       });
+      if (ref) {
+        await pw.clickViaPlaywright({
+          cdpPort: ctx.state().cdpPort,
+          targetId: tab.targetId,
+          ref,
+        });
+      }
       res.json({ ok: true });
     } catch (err) {
       handleRouteError(ctx, res, err);

src/browser/server.test.ts

@@ -475,6 +475,24 @@ describe("browser control server", () => {
       timeoutMs: 1234,
     });
 
+    const uploadWithRef = await realFetch(`${base}/hooks/file-chooser`, {
+      method: "POST",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify({ paths: ["/tmp/b.txt"], ref: "e12" }),
+    }).then((r) => r.json());
+    expect(uploadWithRef).toMatchObject({ ok: true });
+    expect(pwMocks.armFileUploadViaPlaywright).toHaveBeenCalledWith({
+      cdpPort: testPort + 1,
+      targetId: "abcd1234",
+      paths: ["/tmp/b.txt"],
+      timeoutMs: undefined,
+    });
+    expect(pwMocks.clickViaPlaywright).toHaveBeenCalledWith({
+      cdpPort: testPort + 1,
+      targetId: "abcd1234",
+      ref: "e12",
+    });
+
     const dialog = await realFetch(`${base}/hooks/dialog`, {
       method: "POST",
       headers: { "Content-Type": "application/json" },