Browser Tool Sync to Async Fix | Generated by AI

Home 2026.06

Works. Here’s what I changed:

Root cause: browser_tool.py used playwright.sync_api.sync_playwright() which creates its own asyncio event loop. Since main() is now async (running inside asyncio.run()), Playwright’s sync API detects the existing loop and raises “Sync API inside the asyncio loop.”

Fix — 2 files, 3 changes:

  1. iclaw/tools/browser_tool.py — full rewrite from sync to async Playwright:
    • sync_playwright → async_playwright
    • All functions (_ensure_playwright, _get_browser, _build_element_map, _get_element_snapshot, browser_navigate, browser_snapshot, browser_click, browser_type, browser_press, browser_scroll, browser_screenshot, browser_console, browser_back, browser_close, dispatch_browser_call) are now async def
    • All Playwright calls use await (page.goto(), el.click(), page.evaluate(), etc.)
  2. iclaw/main.py — two call sites updated:
    • Line 359: dispatch_browser_call(...) → await dispatch_browser_call(...)
    • Line 525: dispatch_browser_call(...) → await dispatch_browser_call(...)

Smoke test passes — navigates to example.com and returns the page snapshot correctly.

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