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Included review availability: This review used your included allowance. Your plan provides up to 10 included reviews per hour; 9 remain after this review. 📝 WalkthroughWalkthroughThis pull request adds an opt-in macOS ChatGPT Desktop integration. It routes traffic through local HTTP and WebSocket relays, rewrites specific usage-related send gates, and adds runtime, launch-watcher, and CLI controls. It also adds tests and localized setup and troubleshooting guides. ChangesChatGPT Desktop Send Unblock
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~60 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant ChatGPTDesktop
participant ChatgptUnblockListener
participant WsRelay
participant dialUpstreamTunnel
participant ChatGPT
ChatGPTDesktop->>ChatgptUnblockListener: Send HTTPS request or WebSocket upgrade
ChatgptUnblockListener->>ChatGPT: Forward HTTP request and rewrite matching response
ChatgptUnblockListener->>WsRelay: Handle relayable WebSocket upgrade
WsRelay->>dialUpstreamTunnel: Open upstream TLS tunnel
dialUpstreamTunnel->>ChatGPT: Connect to chatgpt.com:443
WsRelay->>ChatGPTDesktop: Relay WebSocket frames
Merge Risk: ⚪ Minimal · up to The documented PAC workflow and its launch, routing, and cleanup paths no longer have a confirmed blocking issue. The change is ready for normal checks. Security Architecture ReviewSecurity architecture risk: 🟡 Moderate · up to Fallback improves availability, but under some proxy failures it can route ChatGPT Desktop traffic directly instead of through the configured system proxy. Repeated startup can also lose track of a listener that shutdown should stop. Both conditions are limited to this opt-in macOS integration. Retained concerns
Security review detailsSecurity Blast Radius
Security Findings and Attack Paths
Trust Boundaries and Controls
Resilience and Maintainability Implications
Hardening Proposals
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 59.32% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 118 functions across 30 files. (10 skipped: 10 unsupported.)
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리뷰 · 우선순위 70 / 80ChatGPT 데스크톱 앱은 사용량이 다하면 보내기 버튼을 잠급니다. opencodex가 다른 모델로 대화를 넘겨도, 앱은 chatgpt.com의 사용량 답을 보고 입력창을 막습니다. 이 PR은 맥에서만, 설정을 켠 사람에게, 그 잠금을 푸는 가로채기를 넣습니다. 로컬 리스너가 chatgpt.com인 척하고, 보내기 잠금만 지웁니다. 사용량 숫자와 리셋 시각은 그대로 둡니다. 앱을 열 때 도메인 규칙을 붙이는 감시기도 같이 넣습니다. 이 줄기는 이미 열린 PR #5733과 같습니다. 그 머리 커밋 그 위에 라인 - 라인 - 같은 파일의 라인 - 메인테이너의 판단이 필요한 지점 #5733과 이 PR을 둘 다 머지하면 데스크톱 가로채기 전체가 두 번 들어갑니다. PAC를 이 PR로 합칠 계획이면 #5733을 닫으세요. #5733을 먼저 넣을 계획이면 이 브랜치는 PAC 커밋만 남기세요. PR 본문은 종료 로그는 PAC로 띄운 앱이 죽은 입구를 가리킨다고 경고합니다. 이 PR은 초안입니다. 준비 체크는 0/4입니다. 너의 추천
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Inline comments:
In `@docs-site/src/content/docs/guides/chatgpt-desktop.md`:
- Around line 69-70: Update the ChatGPT Desktop guide and its seven translated
versions to document the opt-in `chatgptDesktop.pacFallback` configuration.
Distinguish system-proxy launch arguments from generated-PAC-URL launches,
explain that PAC fallback can use the captured proxy chain after opencodex
stops, and correct the troubleshooting guidance so it does not imply every
routed app depends on the stopped listener.
In `@scripts/test-layout/layout.json`:
- Around line 1954-1963: Remove duplicate ChatGPT test mappings, retaining
exactly one mapping per test in both JSON objects. In
scripts/test-layout/layout.json (lines 1954-1963), deduplicate the explicit
mappings, including rewrite.test.ts; in tests/fixtures/test-layout-expected.json
(lines 1618-1626), deduplicate each unblock-* test mapping.
In `@src/chatgpt/desktop-unblock/entry-proxy.ts`:
- Around line 41-74: Update handleData and the socket handlers to preserve bytes
when write accepts only part of a chunk: queue each unwritten remainder and
flush it on the destination’s drain event in both tunnel directions, including
leftover bytes. Track the queues in EntryState and wire drain handling for both
sockets so no tunnel data is dropped.
- Around line 84-87: Update the CONNECT success handler that assigns
state.upstream to disable the client socket timeout before writing the 200
response, so the header deadline no longer closes an established tunnel.
In `@src/chatgpt/desktop-unblock/launch-watcher.ts`:
- Around line 489-510: Update runLaunchScript, launchChatgptWithRule, and
restoreChatgptNative to accept and forward PAC-mode options to
buildChatgptUnblockWatcherScript; update the launch and restore call sites in
the CLI to derive and pass the PAC entry port using the existing configuration
logic. In the script’s native-mode app_flagged check, recognize both PAC and
resolver switches so restore removes either launch mode.
In `@src/chatgpt/desktop-unblock/pac.ts`:
- Around line 33-40: Update parseScutilOutput in
src/chatgpt/desktop-unblock/pac.ts (lines 33-40) to parse scutil’s
colon-delimited key/value lines and make the parser accessible to tests or
expose an equivalent string-accepting entry point. In
tests/chatgpt-unblock/unblock-pac.test.ts (lines 4-8), add coverage using the
SCUTIL_SYSTEM_PROXY fixture and assert the resulting chain contains the two
PROXY entries and one SOCKS5 entry at 127.0.0.1:7892.
In `@src/chatgpt/desktop-unblock/ws-relay.ts`:
- Around line 125-134: Update the successful-handshake path in finish to keep an
error listener on the socket until WsRelay.attach installs its handlers, so late
errors cannot become uncaught exceptions. Preserve handling for handshake
failures and ensure the listener remains effective if upgrade fails or the app
disconnects before attach.
In `@src/cli/chatgpt-command.ts`:
- Line 69: Handle the uninstall-watcher action before calling
resolveChatgptUnblockPort in the CLI flow; watcher removal does not require a
port, so it must work even when port resolution would throw. Keep port
resolution for actions that use the intercept port.
- Line 119: Update the direct command paths in `chatgpt-command.ts`: at line
119, pass the selected PAC mode and its entry port through the launch-script
path; at line 128, pass the selected PAC mode to the restore-script path so it
recognizes and removes the PAC switch. Keep the existing resolver-mode behavior
intact.
In `@src/cli/registry.ts`:
- Around line 497-500: Update the `install-watcher` and `launch` help details in
the registry to describe both configuration-dependent launch modes: the
host-resolver rule and the PAC fallback using `--proxy-pac-url`. Keep the
descriptions concise and make clear that the selected mode depends on
configuration.
In `@tests/chatgpt-unblock/unblock-entry-proxy.test.ts`:
- Around line 55-85: Replace the ineffective checks in the end-to-end splice
test with a real round trip over the same TCP socket: connect to the entry
proxy, issue CONNECT, upgrade that socket with TLS, request the unblock
endpoint, and assert the response contains the service id. Also verify
backpressure with a local fake upstream returning a multi-megabyte body, read it
slowly, and assert its byte count and hash match.
In `@tests/chatgpt-unblock/unblock-runtime.test.ts`:
- Around line 58-90: Update the PAC-mode tests to obtain an available base port
by briefly listening on port 0, then use it for the origin and derive the entry
port as base port + 1; in the bind-failure test, occupy that derived entry port.
Remove the unused first Bun.connect call from the connection probe, keeping the
existing probe that verifies the entry accepts connections.
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📒 Files selected for processing (43)
devlog/_fin/260905_test_modularization_and_windows/001_test_inventory.mddocs-site/astro.config.mjsdocs-site/src/content/docs/fr/guides/chatgpt-desktop.mddocs-site/src/content/docs/guides/chatgpt-desktop.mddocs-site/src/content/docs/ja/guides/chatgpt-desktop.mddocs-site/src/content/docs/ko/guides/chatgpt-desktop.mddocs-site/src/content/docs/ru/guides/chatgpt-desktop.mddocs-site/src/content/docs/tr/guides/chatgpt-desktop.mddocs-site/src/content/docs/zh-cn/guides/chatgpt-desktop.mddocs-site/src/content/docs/zh-tw/guides/chatgpt-desktop.mdscripts/test-layout/layout.jsonsrc/chatgpt/desktop-unblock/ca-trust.tssrc/chatgpt/desktop-unblock/entry-proxy.tssrc/chatgpt/desktop-unblock/launch-watcher.tssrc/chatgpt/desktop-unblock/listener.tssrc/chatgpt/desktop-unblock/pac.tssrc/chatgpt/desktop-unblock/rewrite.tssrc/chatgpt/desktop-unblock/runtime.tssrc/chatgpt/desktop-unblock/ws-frame.tssrc/chatgpt/desktop-unblock/ws-relay.tssrc/chatgpt/desktop-unblock/ws-upstream.tssrc/cli/chatgpt-command.tssrc/cli/dispatch.tssrc/cli/help.tssrc/cli/registry.tssrc/config/schema/config-schema.tssrc/server/index/chatgpt-unblock-lifecycle.tssrc/server/index/optional-listeners.tssrc/types/config.tsstructure/INDEX.mdstructure/manifest.jsontests/chatgpt-unblock/rewrite.test.tstests/chatgpt-unblock/unblock-ca-trust.test.tstests/chatgpt-unblock/unblock-entry-proxy.test.tstests/chatgpt-unblock/unblock-launch-script.test.tstests/chatgpt-unblock/unblock-listener.test.tstests/chatgpt-unblock/unblock-pac.test.tstests/chatgpt-unblock/unblock-runtime.test.tstests/chatgpt-unblock/unblock-watcher-install.test.tstests/chatgpt-unblock/unblock-ws-frame.test.tstests/chatgpt-unblock/unblock-ws-relay.test.tstests/fixtures/test-layout-expected.jsontests/lab/core-lab-boundary.test.ts
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Adds an opt-in `chatgptDesktop.unblockSend` integration for the ChatGPT desktop app. When enabled, the service binds a local TLS listener for `chatgpt.com` (shared intercept CA, port defaults to public port + 200) and rewrites the subscription-quota send locks out of the payloads the desktop app reads: - `blocked_features[send|tpp_send]` and `limits_progress[send]` entries in conversation payloads - `rate_limit.allowed` / `rate_limit.limit_reached` gate flags in the `/backend-api/wham/usage` snapshot and usage stream Quota display stays honest: percentages, reset timestamps and the upsell banner pass through byte-identical, so the app keeps showing the account's real usage while the composer unlocks for turns whose model calls are routed to third-party providers by opencodex. Design notes: - Launch rule (`--host-resolver-rules=MAP chatgpt.com 127.0.0.1:<port>`) is printed at startup; only the exact host `chatgpt.com` is mapped, so auth.openai.com and the codex-cloud WebSocket stay native. - Fire-and-forget lifecycle like the Claude intercept: a bind failure degrades to a warning and never blocks startup. - SSE is rewritten line-buffered; untouched streams keep their exact chunking and line endings. - Config group is opt-in, off by default, malformed reads as off. Tests: 11 cases over JSON/SSE rewrite, gate flipping, unchanged detection, malformed-entry passthrough and display-field preservation.
The Chromium resolver rule only applies when the app is launched with it, so a normal Dock/Spotlight launch reaches the real chatgpt.com and the composer locks again. Adds a launchd agent that watches the app's Electron SingletonLock (written on every launch) and, exactly once per launch, restarts the app with the resolver rule if it was started without one. There is no resident polling process: launchd wakes the one-shot script on the lock event and the script exits after one check. - `ocx chatgpt status|install-watcher|uninstall-watcher|launch` - The watcher only acts when the opencodex intercept listener is actually listening, so with the feature off the app stays native. - Install is idempotent (bootout + bootstrap) and survives reboots.
… fixes Launch and watcher - Pass the resolver rule as one --host-resolver-rules= switch (a bare MAP argument is ignored by Chromium) and detect it the same way. - Build launch arguments from the system proxy at launch time: with an HTTP(S)/SOCKS system proxy add --proxy-server=<proxy>,direct:// and --proxy-bypass-list=chatgpt.com, otherwise the resolver rule alone. No VPN rules are required; PAC degrades to the rule alone. - One script serves the launchd watcher, `ocx chatgpt launch` and the new `ocx chatgpt restore` (native relaunch). Quit is confirmed before reopening, runs are serialised with a lock, and the app is found by exact process name. - The watcher acts only when the port answers the listener's identity path, not merely when something listens there. - install/uninstall-watcher propagate launchctl failures; install asks for confirmation (--yes non-interactive); plist and script values are escaped. Listener - Relay WebSocket upgrades on the intercepted host (voice dictation and any other endpoint) through the configured proxy (HTTP CONNECT / SOCKS5 / direct). - Rewrite only conversation/init, the conversation stream and wham/usage; everything else passes through byte-identical. - Remove only quota send blocks; keep eligibility and unknown reasons (e.g. work_subscription_required) and report them in status. - Handle 204/205/304 and HEAD without a body, CRLF-framed SSE lines, and drop alt-svc so the app does not attempt HTTP/3. - Reject an out-of-range derived port with guidance. Status and docs - `ocx chatgpt status` reports listener identity, CA trust, kept send blocks and an app routed at a listener that is gone; stop warns about the latter. - List `ocx chatgpt` in the help banner (missing on the PR head) and note the ChatGPT lifecycle in the optionalListeners.start() synchronous-window entry. - Add the ChatGPT Desktop guide in English and all seven locales.
…ttps:// + credentialed proxies - The relay's fragmentation buffer now enforces WEBSOCKET_MAX_FRAME_BYTES as a total payload limit alongside the 1024-chunk cap, failing with 1009. - dialUpstreamTunnel TLS-wraps https:// proxy sockets before the CONNECT handshake (SNI omitted for IP-literal proxies, which node:tls forbids) and sends Basic Proxy-Authorization when the proxy URL carries credentials.
…ttach readResponseHead removed its error listener once the upstream 101 head was read, and WsRelay.attach() adds new ones only when Bun opens the app-side websocket. An upstream reset in that gap (or after a failed upgrade) emitted 'error' with no listener, which the emitter throws -- taking the whole proxy down for an optional integration. A no-op listener now covers the gap. Also drops the duplicate chatgpt-unblock keys from the test-layout files: each test is mapped once, in the sorted body.
…x stopping Opt-in via chatgptDesktop.pacFallback. Instead of a host-resolver rule, the app is launched with --proxy-pac-url pointing at a generated PAC file: the intercepted host goes to a new loopback CONNECT entry listener that splices onto the TLS origin listener, and every other host goes to the system proxy chain captured from scutil --proxy at generation time (VPN-state dependent, never hard-coded DIRECT) with DIRECT last. When opencodex stops the entry listener dies and Chromium falls through the PAC chain on its own -- the app keeps working with no restart. The launch watcher refuses to start the app in PAC mode unless the entry listener is answering, and /chatgpt status reports the mode, entry port, and per-mode launch switches.
- The scutil parser read `Key = value`; the real `scutil --proxy` prints `Key : value`, so the captured system chain was always empty and every generated PAC degraded to DIRECT. Accept both separators and test the parser against the real output shape. - entry_ours probed the entry with curl -x but no URL and --noproxy '*', which bypasses the proxy under test; the probe now fetches a chatgpt.com URL through the entry as an HTTP proxy. The launch script refuses to route the app while the entry is down, as before. - ocx chatgpt launch and restore always built a resolver-rule script even with pacFallback on; both now pass the mode and entry port, and restore recognizes a PAC-routed app. The registry wording no longer assumes the resolver rule. - The entry proxy re-entered the head parser for bytes arriving while the upstream dial was in flight, which could answer a second CONNECT and emit two 200 heads on one tunnel. Bytes are queued until the splice is live. - uninstall-watcher now works even when the intercept port cannot be resolved from config. - The shutdown warning in PAC mode now says the app falls back to the captured system chain (it does not point at a dead entry), matching the status output and design.
…dline Bun sockets are unbuffered: write() takes what fits and returns the count, so the splice dropped the remainder whenever a peer's buffer filled -- a large response to a slow app-side reader corrupted the TLS stream. Each direction now queues the unwritten bytes, pauses the producing socket and flushes on drain; a closing peer's queue is flushed before the other side is ended. The app socket is also paused while the upstream dial is in flight. socket.timeout() without a timeout handler never closes the socket in the current Bun, so the 10 s head deadline never fired; a handler now ends a socket that has not opened a tunnel, and the deadline is cleared once the tunnel is live. The weak "end to end" test is replaced by real tunnel tests: an 8 MiB TLS response through the entry to a reader that pauses mid-stream (fails on the old splice, passes at 64 KiB there), a tunnel idling past the head deadline, a silent client closed at the deadline, and payload sent right behind the CONNECT head.
…iled start With a system PAC configured (the PAC mode of VPN clients such as ShadowsocksX-NG), scutil exposes no proxies, so the generated PAC sent every other host DIRECT and bypassed the PAC's per-host routing. The system PAC is now read at start -- file:// from disk, http(s):// through node:http, since Bun's fetch sends even loopback requests through HTTP(S)_PROXY -- and embedded in a function scope; the generated FindProxyForURL sends chatgpt.com to the entry and then the system answer, and every other host to the system answer. An unreadable system PAC degrades to DIRECT with a startup warning. A PAC write failure after the entry bound left the entry listening; both listeners are now released. Duplicate chain entries (the same proxy for HTTPS and HTTP) are folded. Tests evaluate generated PACs in a VM for three ways a system PAC may declare its entry point, load PACs from file://, loopback http:// with a dead HTTP_PROXY set, and the failure cases, and move the runtime tests off the default 10300/10301 pair.
Adds the opt-in pacFallback setting, how the generated PAC routes other hosts per network setup, and its shutdown behaviour; the network-setups table and the "opencodex stopped" troubleshooting entry now say they describe the default mode. Same change in all eight locales.
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Thanks for the review. All points are addressed on the new head Line findings
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Also fixed from the CodeRabbit review: the scutil parser read |
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restore only recognized the switch of the configured mode, so after pacFallback was toggled it left an app launched with the other switch in place. The native path now matches either switch; watch and launch keep the mode-specific check. Drops an unused variable in the script builder.
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Requesting changes on exact head b6e97f35. proxy-env.ts accepts authenticated SOCKS URLs from ALL_PROXY and scheme-matched variables, but ws-upstream.ts:218-223 advertises only SOCKS5 no-auth and rejects a username/password method. With socks5://user:pass@proxy, ordinary fetch transport can authenticate while ChatGPT voice/dictation WebSocket upgrade fails with 502.
Implement RFC 1929 username/password negotiation (including decoded credential and length bounds) or fail the proxy selection before claiming support. Reuse the existing authenticated SOCKS transport contract and add exact handshake tests for success, refusal, malformed replies, and cleanup. Exact-head executable CI is currently absent.
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Summary
Opt-in PAC-fallback mode for the ChatGPT desktop send-unblock intercept, so the app keeps working when opencodex stops.
Merge order: after #5733. This PR is stacked on #5733. GitHub does not allow a fork branch as a base, so the base stays
dev:dev(af38c9566);db562682ffixes two things CodeRabbit found in that code while reviewing this PR: a missingerrorlistener on the WebSocket tunnel between the handshake andattach()(an upstream reset in that gap could crash the proxy), and duplicate test-layout keys;What the mode does (
chatgptDesktop.pacFallback, default off; only takes effect together withunblockSend):--proxy-pac-url=file://<configDir>/chatgpt-unblock.pacinstead of the--host-resolver-rulesswitch. The PAC is rewritten at every opencodex start.chatgpt.comgoes to a new loopback CONNECT entry listener (listener port + 1), which accepts onlyCONNECT chatgpt.com:443and splices the bytes onto the existing TLS listener. The splice is backpressure-safe (Bun sockets are unbuffered, so unwritten bytes are queued and the producer paused untildrain), and a client that never finishes its head is closed at the deadline.chatgpt.comwhile opencodex is stopped — follows the system route captured at start, never a hard-coded DIRECT: thescutil --proxyproxies (HTTPS, HTTP, SOCKS5, then DIRECT) in system-proxy mode; the system PAC script itself, embedded in the generated file, when a PAC is configured (the PAC mode of VPN clients such as ShadowsocksX-NG); DIRECT in TUN mode or without a proxy. A system PAC that cannot be read degrades to DIRECT with a startup warning.ocx chatgpt launch,restore,install-watcherandstatusfollow the configured mode.restoreundoes either switch, so it also works afterpacFallbackwas toggled. The watcher refuses to route the app while the entry listener is down.Verification
bun run typecheck,bun run privacy:scan,bun run structure:check,bun run skill:surface:check— pass.bun scripts/test-layout/verify.ts --domain chatgpt-unblock— pass.bun test ./tests/chatgpt-unblock/— 135 pass, 0 fail.bun test ./tests/cli/ ./tests/lab/core-lab-boundary.test.ts— 1309 pass, 0 fail.bun test ./tests/ci-workflows/ ./tests/test-layout.test.ts ./tests/test-layout-tooling.test.ts— 1401 pass, 0 fail.timeouthandler, the listener-release test fails without the cleanup, and the two WebSocket late-error tests throw without the listener.scutil --proxyoutput on a Mac with a system proxy. Generated PACs are evaluated in a VM, including three ways a system PAC can declareFindProxyForURL.Checklist
docs-siteguide in all eight locales.)CONNECT chatgpt.com:443, so it is never a general forward proxy. The embedded system PAC is the script Chromium would run anyway. The PAC file is written 0644 inside the config dir. The feature is off by default; no secrets are logged or stored.)Review readiness checklist
This PR stays in draft until every box below is ticked. Tick all four boxes once the requirements are met:
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I pushed my PR to a recent dev commit (at most 10 behind; a maintainer may still ask for the exact tip before merge).
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My PR is ready for review.
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