reckless: process hung in CI

[daywalker90]

I tried reckless through the recklessrpc plugin like this:

l1 = node_factory.get_node()
l1.rpc.call("reckless", ["source", "remove", "https://github.com/lightningd/plugins"])

and this works on my machine with CLN v25.12 just fine but on the CI, also v25.12, i get:

lightningd-1 2025-12-05T16:07:44.179Z DEBUG   plugin-recklessrpc: calling: reckless -v --json -l /tmp/ltests-lpr9tg9f/test_program_1/lightning-1/ --network regtest source remove https://github.com/lightningd/plugins (null)
lightningd-1 2025-12-05T16:07:44.271Z DEBUG   plugin-recklessrpc: confirming config creation
lightningd-1 2025-12-05T16:07:44.291Z DEBUG   plugin-recklessrpc: reckless failed to exit, killing now.

error: {'code': -3, 'message': 'reckless process hung'}

Now if i try this in the CI:

l1 = node_factory.get_node()

ln_dir = str(Path(l1.info["lightning-dir"]).parent)
subprocess.run(
         [
             "reckless",
             "-v",
             "--json",
             "-l",
             ln_dir,
             "--network",
             "regtest",
             "source",
             "remove",
             "https://github.com/lightningd/plugins",
         ],
         input="Y\n",
         text=True,
         capture_output=True,
     )

it works.