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This was referenced Jul 7, 2026
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## Why #31335 lets HTTP callers obtain proxy-aware clients from `HttpClientFactory`, but a non-HTTP transport such as WebSockets also needs two pieces of policy owned by `codex-http-client`: a concrete route decision for its destination and the same custom-CA-aware rustls trust configuration used by HTTPS. Keeping these prerequisites in the shared abstraction means the dependent Responses WebSocket change (#31441) cannot independently reinterpret `features.respect_system_proxy`, PAC results, or enterprise CA settings. ## What changed - Add a redaction-safe `OutboundProxyRoute` with explicit transport-default, direct, and concrete-proxy outcomes. - Add `HttpClientFactory::resolve_proxy_route()` so transports can resolve a destination through the already-selected outbound proxy policy. - Resolve `ws://` and `wss://` URLs through their HTTP equivalents so system and PAC rules apply consistently. - Add an always-returned rustls config builder that starts from native roots and layers in any configured Codex custom CA bundle. The existing optional builder remains available to callers that can delegate the default configuration to their transport. - Continue redacting proxy URLs from `Debug` output because they may contain credentials. ## Review guide 1. `http-client/src/outbound_proxy.rs` defines the transport-neutral route result and WebSocket URL normalization. 2. `http-client/src/custom_ca.rs` factors the native-root/custom-CA construction so callers that perform TLS themselves can always obtain a config. 3. `http-client/src/outbound_proxy_tests.rs` verifies WebSocket normalization and legacy transport-default behavior. ## Test plan - `just test -p codex-http-client outbound_proxy` - `just test -p codex-http-client custom_ca` --- [//]: # (BEGIN SAPLING FOOTER) Stack created with [Sapling](https://sapling-scm.com). Best reviewed with [ReviewStack](https://reviewstack.dev/openai/codex/pull/31342). * #31431 * #31363 * #31362 * #31361 * #31442 * #31441 * __->__ #31342
bolinfest
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## Why The route-aware WebSocket connection setup in #31441 is transport infrastructure rather than Responses API protocol logic. Landing it first in a dedicated crate keeps `codex-api` focused on request and response behavior and makes the transport reusable by future WebSocket clients. WebSockets must also apply the same effective outbound proxy and custom-CA policy as HTTP without disabling the lower-latency WebSocket path. Requiring an `HttpClientFactory` when constructing the connector makes proxy-policy resolution part of the API instead of an optional call-site convention. This PR is an independent prerequisite based directly on `main`. After it merges, #31441 can rebase onto it and replace its in-crate connector with this API. ## What changed - Add a new `codex-websocket-client` workspace crate with a `WebSocketConnector` constructed from the effective `HttpClientFactory`. - Resolve every destination through that factory before connecting, then support direct connections, transport-default routing, HTTP proxies, and TLS-encrypted HTTPS proxies. - Preserve custom-CA trust for proxy and target TLS handshakes and preserve Happy Eyeballs fallback for explicit direct and proxy routes. - Expose an established `WebSocketConnection` as a uniform `Stream` and `Sink`, hiding route-specific transport types from protocol clients. - Add focused integration-style coverage for the public connector and message stream, real WSS over direct and CONNECT routes, implicit and explicit HTTPS proxy ports, and stalled-address-family fallback. ## Review guide 1. `codex-rs/websocket-client/src/lib.rs` defines the small public API and the factory-required policy invariant. 2. `codex-rs/websocket-client/src/dialer.rs` contains DNS, TCP, proxy tunneling, TLS, and WebSocket handshake setup. 3. `codex-rs/websocket-client/src/dialer_tests.rs` verifies the public stream, direct and proxied WSS paths, HTTPS port preservation, and Happy Eyeballs timing. 4. There is intentionally no consumer migration here; #31441 will become the first consumer after this prerequisite merges. ## Test plan - `cargo check -p codex-websocket-client --tests` - `just test -p codex-websocket-client` - `cargo shear` - `just bazel-lock-check`
viyatb-oai
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Jul 8, 2026
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Why
Responses WebSockets are the normal lower-latency transport for WebSocket-capable providers. They must not bypass an OS-selected proxy when
features.respect_system_proxyis enabled, but disabling WebSockets whenever the feature is enabled would impose a substantial performance penalty.Merged PR #31622 introduced the reusable proxy-aware WebSocket transport. This PR makes the Responses API its first consumer so the existing fast path uses the same effective proxy and trust policy as HTTP.
What changed
codex-websocket-clientas a workspace dependency and use it fromcodex-api.WebSocketConnectioninto the existing Responses message pump.HttpClientFactoryfor normal Responses WebSocket connections and the CLI doctor probe, so neither path can open a connection without consulting the effective proxy policy.coreand the effective configuration factory fromdoctor.RespectSystemProxy, asserts the resolved policy, completes a turn over WebSocket, and verifies the connection and request counts.The DNS, proxy, TLS, custom-CA, and Happy Eyeballs implementation and its transport tests live in merged PR #31622. This PR deliberately contains only the Responses integration and does not duplicate that transport code.
Review guide
codex-rs/codex-api/src/endpoint/responses_websocket.rsconstructs the shared connector and adapts its uniform stream to the existing pump.codex-rs/core/src/client.rssupplies the session-scoped factory for production Responses connections.codex-rs/cli/src/doctor.rssupplies the effective configuration factory to the handshake probe.codex-rs/core/tests/suite/client_websockets.rscovers the enabled-feature path end to end.Test plan
cargo check --tests -p codex-api -p codex-core -p codex-clijust test -p codex-apijust test -p codex-core responses_websocket_streams_with_system_proxy_featurecargo shearjust bazel-lock-checkStack created with Sapling. Best reviewed with ReviewStack.