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* fix(channels): keep Gateway calls off the environment proxy * fix(channels): keep the aio_sandbox policy import lazy Importing deerflow.community.aio_sandbox.backend at module scope executes the package __init__, which eagerly imports AioSandbox, AioSandboxProvider and both backends. That makes every ChannelManager import load the entire sandbox provider stack even when a different sandbox is configured. Mirror app/gateway/health.py::_make_provisioner_client: move the import into a small _make_gateway_client helper and route both Gateway call sites through it, so the URL policy stays lazy. * fix(channels): keep the run client off the environment proxy langgraph_sdk.get_client() builds httpx.AsyncHTTPTransport(retries=5) on an httpx.AsyncClient that leaves trust_env at its default True and exposes no transport/trust_env override, so ChannelManager._get_client() still sent runs.wait submissions to a loopback Gateway through HTTP_PROXY. That is the hop #7876 reports: the control-plane calls are fixed, the run submission is not. Route the SDK client through _make_langgraph_client: loopback and private Gateways get an explicit trust_env=False httpx.AsyncClient carrying the SDK's own retries, timeout and User-Agent and handed to LangGraphClient, while external Gateways keep the stock get_client() path. Also move the URL policy out of the aio_sandbox package into deerflow.utils.http_policy (control_plane_trust_env). Keeping the import lazy did not help on its own: aio_sandbox/__init__ eagerly imports the provider stack, so importing aio_sandbox.backend still loaded all of it. The neutral module has no httpx or sandbox dependency, so manager.py and gateway/health.py import it at module scope, and aio_sandbox.backend re-exports it as sandbox_http_trust_env for the existing sandbox call sites. * fix(channels): keep AGENTS.md under budget and align legacy CSRF test with new client * style(sandbox): remove unused urlparse import --------- Co-authored-by: jack12178 <jack12178@users.noreply.github.com> Co-authored-by: Willem Jiang <willem.jiang@gmail.com>