Description
I am trying to get a local ollama-backed tiny-agent, with playwright, to work. I have llama3.1:latest working with ollama. I have a working tiny-agent which I execute via npx @huggingface/tiny-agents run ./my-agent and such that my agent.json looks like
{
"model": "llama3.1:latest",
"endpointUrl": "http://localhost:11434",
"servers": [
{
"type": "sse",
"config": {
"url": "http://localhost:8931/sse"
}
}
]
}
I spin up playwright, before running the agent, manually via this command npx @playwright/mcp --port 8931.
The agent starts and I get a cursor, but when I enter a prompt, I always get some version of this error (JSON parse error):
Agent loaded with 25 tools:
- browser_close
- browser_resize
- browser_console_messages
- browser_handle_dialog
- browser_file_upload
- browser_install
- browser_press_key
- browser_navigate
- browser_navigate_back
- browser_navigate_forward
- browser_network_requests
- browser_pdf_save
- browser_take_screenshot
- browser_snapshot
- browser_click
- browser_drag
- browser_hover
- browser_type
- browser_select_option
- browser_tab_list
- browser_tab_new
- browser_tab_select
- browser_tab_close
- browser_generate_playwright_test
- browser_wait_for
> Close browser
browser_close {}
/home/.../playground/repos/huggingface.js/packages/tiny-agents/dist/cli.js:118
throw err;
^
SyntaxError: Unexpected token { in JSON at position 2
at JSON.parse ()
at Agent.processSingleTurnWithTools (/home/.../playground/repos/huggingface.js/packages/mcp-client/dist/src/index.js:233:71)
at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
at async Agent.run (/home/.../playground/repos/huggingface.js/packages/mcp-client/dist/src/index.js:328:9)
at async mainCliLoop (/home/.../playground/repos/huggingface.js/packages/tiny-agents/dist/cli.js:129:22)
at async main (/home/.../playground/repos/huggingface.js/packages/tiny-agents/dist/cli.js:343:5)
Node.js v18.19.1
I think the issue has to do with JSON.parse calls. I've tried stdio, http and sse for connecting to playwright, including letting the tiny-agent software issue the npx command for me. I think it's something to do with my leveraging a local model? This is why I'm here, I couldn't figure it out. Any and all assistance is appreciated.
My versions of packages are:
dependencies:
@huggingface/tiny-agents link:../repos/huggingface.js/packages/tiny-agents
@modelcontextprotocol/sdk 1.12.0
@playwright/mcp 0.0.27
express 5.1.0
ollama 0.5.15
(I was originally on @huggingface/tiny-agents v0.2.3, but I pulled down the repo, built and installed it to see if that would work, it didn't.)
I'm running Ubuntu 24.04.