The websockets dials got proxy=None but the three HTTP /json/version dials
(CDP override discovery, is_browser_debug_ready used by Lightpanda and the
real-profile readiness check, and surviving-Chrome detection) still resolved
via getproxies(), so under a system/env proxy discovery fell back to the raw
http:// URL, readiness never fired and /browser connect reported not ready.
loopback_request_kwargs() sits next to loopback_connect_kwargs() and is used
at all three sites (ProxyHandler({}) opener for the urllib one).
add_loopback_no_proxy turned an operator NO_PROXY=* into '*,127.0.0.1,...',
which urllib/requests no longer treat as the wildcard, flipping bypass-all
configs into proxy-all. A wildcard in either casing now leaves env untouched.
is_loopback_host also accepts any loopback IP literal (127.x, ::ffff:127.0.0.1).
Review finding: HTTP /json/version dials still proxied loopback; NO_PROXY=* wildcard broken by append.
Move the loopback NO_PROXY merge from browser_tool into agent/proxy_bypass.py (the
module that already owns NO_PROXY semantics) and reuse no_proxy_entries() so comma-
and whitespace-separated operator values are both preserved. Add
loopback_connect_kwargs() and pass proxy=None on the two in-process websockets
dials to loopback CDP endpoints (browser_cdp_tool._cdp_call, BrowserSupervisor._run):
those never see the child env, so the env merge alone left them routed through a
macOS system proxy. Remote CDP URLs keep the default proxy behaviour.
Tests trimmed to two invariants: the built child env appends loopback to an
operator NO_PROXY in both casings, and only loopback URLs get proxy=None.
Sibling helper in tools/browser_use_cli (#110570) is redundant once the shared
env carries the entries.
`_get_proxy_for_base_url` lost its guard when it moved onto the shared matcher:
`split_host_port` read `urlsplit(...).port`, which raises ValueError for
`http://host:notaport/v1` or `:99999`, and `build_keepalive_http_client`'s
outer except then returned None -- the client silently lost the shared pool
instead of merely skipping the bypass check. The port parse now yields
`(host, None)` on ValueError only; the host still matches NO_PROXY entries.
Review follow-up on #109539.
The shared matcher took the gateway adapter's `*.` branch, which only matched
subdomains. The adapter's own `is_host_excluded_by_no_proxy` docstring promised
"leading-dot and `*.` entries match the apex domain and subdomains" (the
curl/requests convention), so `NO_PROXY=*.slack.com` silently stopped covering
`slack.com`. `*.` and `.` entries now share one apex+subdomain rule.
Review follow-up on #109539.
Three answers to "is this host in NO_PROXY": process_bootstrap used the stdlib
proxy_bypass_environment (no CIDR, no `*.`), gateway/platforms/base.py had a
full matcher (should_bypass_proxy) and a second suffix-only one
(is_host_excluded_by_no_proxy, used by Slack). Live-verified: with
NO_PROXY=10.0.0.0/8 Telegram bypassed the proxy while the LLM call to a 10.x
endpoint went through it.
The full matcher moves to the leaf module agent/proxy_bypass.py (stdlib only,
importable at early boot); both base.py functions are one-line forwarders and
process_bootstrap._get_proxy_for_base_url uses it (passing host:port so
port-qualified entries match). The six-key proxy env scan is also shared.
Seven sites hand-rolled `float(headers.get("Retry-After"))` (anon_auth,
shared_metrics_sender, gemini_native_adapter, extract_api_error_context,
nous_rate_guard, skills_hub_github, skills_hub_clawhub x2) and silently
dropped RFC 7231 HTTP-date values that the conversation loop already honours
via agent/retry_utils.py::parse_retry_after_seconds. They now call it; per-site
caps/floors stay at the call site.
The free-text "resets in / quotaResetDelay / retry after N s" regexes lived in
two tables (agent_runtime_helpers vs credential_pool) whose "resets in"
grammars diverged: the pool accepted only integer `Nhr Nmin` while the error
context accepted h/hr/hours + m/min/minutes + s/seconds with decimals. One table
(agent/retry_utils.py::RETRY_DELAY_PATTERNS / reset_delay_from_message) using
the wider grammar, so a pooled credential's cooldown and the UI's reset time
now agree.
