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feat(chatgpt): experimental macOS app-server quota-gate shim (split from #5947) - #6361
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Split the app-server shim out of #5947. ocx chatgpt launch|restore|status relaunches ChatGPT with CODEX_CLI_PATH pointing at a generated launcher that execs the bundled codex app-server unchanged and pipes only its stdout through the hidden 'ocx internal chatgpt-app-server-filter'. The filter clears the plain-quota gate in account/rateLimits/read and account/rateLimits/updated and passes every other line through byte for byte. The launcher falls back to the untouched binary when the platform check, runtime or filter self-test fails. Default off behind chatgptDesktop.appServerShim; macOS only; experimental. Refs #6196 Co-authored-by: lcxhh521 <59329914+lcxhh521@users.noreply.github.com>
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🧰 Additional context used📚 Code guidelines (2)📝 WalkthroughWalkthroughAdds an opt-in macOS ChatGPT app-server shim. It selectively rewrites plain-quota gate fields in app-server output. New CLI operations manage the generated launcher. Configuration validation, tests, and documentation cover the feature. ChangesChatGPT Desktop shim
Estimated code review effort: 4 (Complex) | ~45 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
actor Operator
participant CLI as ocx chatgpt
participant Command as handleChatgptCommand
participant ChatGPT
Operator->>CLI: launch
CLI->>Command: dispatch launch arguments
Command->>Command: verify configuration and bundle
Command->>Command: write launcher
Command->>ChatGPT: quit and reopen with CODEX_CLI_PATH
ChatGPT->>Command: app-server stdout
Command->>ChatGPT: filtered or unchanged stdout
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 40.63% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 32 functions across 19 files. (2 skipped: 2 unsupported.)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Review comments at @src/chatgpt/app-server-shim/gate-rewrite.ts:
- Around line 70-85: Update the rate-limit flag rewrite so it changes allowed
and limit-reached flags only when plain-quota evidence exists (`cleared ||
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docs-site/astro.config.mjsdocs-site/src/content/docs/guides/chatgpt-desktop.mdscripts/test-layout/layout.jsonskills/ocx/references/01_management_surface.mdsrc/chatgpt/app-server-shim/app-server-rewrite.tssrc/chatgpt/app-server-shim/filter.tssrc/chatgpt/app-server-shim/gate-rewrite.tssrc/chatgpt/app-server-shim/launcher.tssrc/cli/capabilities.tssrc/cli/chatgpt-command.tssrc/cli/dispatch.tssrc/cli/help.tssrc/cli/internal-command.tssrc/cli/registry.tssrc/config/diagnostics.tssrc/config/schema/config-schema.tssrc/config/schema/leaf-validators.tssrc/types/config.tsstructure/INDEX.mdstructure/clients/chatgpt-desktop.mdstructure/config.mdstructure/manifest.jsonstructure/runtime.mdtests/clients/desktop-app-server-shim-launcher.test.tstests/clients/desktop-app-server-shim.test.tstests/clients/desktop-chatgpt-config.test.tstests/fixtures/test-layout-expected.json
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…er-shim # Conflicts: # skills/ocx/references/01_management_surface.md
…ten the gate Review fixes for #6361: - Discover ChatGPT by bundle identifier through the desktop restart adapter and derive the app-server binary from that root, so installs outside /Applications work and launch refuses when the bundle has no binary. - Quit by bundle id and reopen the same bundle path, so an unrelated app named ChatGPT is never quit or launched. - Hold a partial line as a list of chunks and join once at its newline, removing quadratic copying on long lines. - Open rate-limit flags only with plain-quota evidence, the same condition ordinaryUsageAllowed already uses. Co-authored-by: lcxhh521 <59329914+lcxhh521@users.noreply.github.com>
Security review of #6361 at 506fb75: - Refuse a bundle or app-server binary owned by another user, writable by group or others, failing strict codesign, or signed by a team other than OpenAI (2DC432GLL2); match only this user's processes. - Write the launcher through an exclusive temp file and a rename, so a symbolic link at that path is replaced rather than followed and a respawn never sees a half-written script. - The launcher exits 127 with a stderr hint when the recorded binary is gone. - Stream lines over 8 MiB through raw instead of buffering them, and append held chunks in place. Co-authored-by: lcxhh521 <59329914+lcxhh521@users.noreply.github.com>
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Review comments at @docs-site/src/content/docs/guides/chatgpt-desktop.md:
- Line 36: Update the `ocx chatgpt restore` instructions to state that if
ChatGPT is not installed, restore removes the launcher, returns an error, and
does not relaunch ChatGPT.
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docs-site/src/content/docs/guides/chatgpt-desktop.md at line 85 and
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Review comments at @structure/clients/chatgpt-desktop.md:
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describe only verified pipe behavior in the present tense; remove the
unvalidated expectation that Desktop respawns the server through the same
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docs-site/src/content/docs/guides/chatgpt-desktop.mdskills/ocx/references/01_management_surface.mdsrc/chatgpt/app-server-shim/bundle-trust.tssrc/chatgpt/app-server-shim/filter.tssrc/chatgpt/app-server-shim/gate-rewrite.tssrc/chatgpt/app-server-shim/launcher.tssrc/cli/chatgpt-command.tsstructure/clients/chatgpt-desktop.mdtests/clients/desktop-app-server-shim-launcher.test.tstests/clients/desktop-app-server-shim.test.ts
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…er-shim # Conflicts: # scripts/test-layout/layout.json # tests/fixtures/test-layout-expected.json
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Review comments at @tests/clients/desktop-app-server-shim.test.ts:
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Maintainer integration record (MAINTAINERS.md, dev-only)
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This was referenced Oct 1, 2026
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Follow-up to #6361. The app-server shim filter now passes a complete line over the 8 MiB cap through as it arrived, even when the whole line lands in one chunk, so it is never joined or parsed. The guide and structure doc now state when the shim falls back to the original binary, what restore does when ChatGPT is not installed, and only behavior that has been verified. The manifest maps src/cli/ and src/codex/ for this doc. Co-authored-by: lcxhh521 <59329914+lcxhh521@users.noreply.github.com>
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Brings the branch to the current dev tip. The resolution matches replaying lidge-jun#6365's intercept commits and the watcher commits onto dev without the pre-squash shim commit, whose content dev already carries through lidge-jun#6361 and lidge-jun#6412: - `src/cli/chatgpt-command.ts` keeps lidge-jun#6365's intercept subcommands and adopts dev's shim hardening: bundle discovery by com.openai.codex, the OpenAI-signed bundle check before the launcher is written, this user's processes only, quit by bundle id, reopen by bundle path. - The structure doc keeps dev's bundle-trust paragraph; runtime.md keeps dev's line with the lifecycle sentence folded in, within its 600-line budget. - Test layout maps both dev's new files and the intercept's test files.
This was referenced Oct 2, 2026
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…e-jun#6412) into our dev Resolution: - One chatgptDesktop config shape: our full schema (unblockSend, pacFallback, appServerShim, port) replaces the shim-only one in types, leaf validators and the config schema. The write boundary reports the offending field; the shim-only early check is dropped, and its test's "invalid" samples now use values that are invalid in the full schema. - One `ocx chatgpt` registry entry, help line and dispatch handler. The command keeps our version for now; non-macOS rejects every subcommand with exit 1, as upstream's test expects. - One manifest entry for structure/clients/chatgpt-desktop.md; INDEX regenerated. - The guide and structure doc keep our text for now. The following commit moves our send-unblock modules onto the maintainer's shim and rewrites both documents.
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…er's app-server shim The app-server shim from upstream (lidge-jun#6361, lidge-jun#6412) is now the only one. Our copy is removed: the desktop-unblock filter, its line rewrite and launcher builder, and the gate rewrite duplicated in rewrite.ts. The intercept now uses the shim's modules. - Launcher: `prepareChatgptShimLauncher` (new, app-server-shim/prepare.ts) runs the shim's own steps. It finds the bundle by com.openai.codex, derives its app-server, refuses a bundle that is not OpenAI-signed or not safely owned, and writes the launcher atomically. Both `ocx chatgpt launch` and `startChatgptUnblock` use it. At start a refusal or a failed write only disables the shim (`shimProblem`, warned); the listeners stay up. The watcher adds CODEX_CLI_PATH only while an executable launcher exists (`shim_wanted`), so a refused bundle never leaves the app pointed at a missing script and never triggers a relaunch loop. - Gate rule: the web usage snapshot uses the shim's `unlockRateLimitGate`. Flags open only with plain-quota evidence. The one addition is that the snapshot's snake_case `used_percent` window at 100% now counts as evidence too, so a real exhausted snapshot still opens. - Command: with `unblockSend` off, `launch|restore|status` are the shim's own flow, unchanged. With it on, `launch` refuses when the shim is not prepared, `restore` removes the launcher after a successful relaunch, and `status` reports the launcher. - Docs: the structure doc and the guide in all eight locales describe both integrations and the shim's two modes, rewrite boundary, bundle checks and failure behavior.
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The app-server shim reached dev through lidge-jun#6361 and the send-unblock intercept is now lidge-jun#6365, with the ready-marker watcher on top in lidge-jun#6381. This branch takes that tree (dev included) and adds the one part that is still only here: PAC fallback. - entry-proxy.ts and pac.ts as before; runtime.ts binds the CONNECT entry and rewrites chatgpt-unblock.pac at every start, before the readiness marker, and releases both listeners on failure. - The launch watcher gains the PAC switch, the entry probe and PAC-aware restore on top of lidge-jun#6381's script; ocx chatgpt launch, install-watcher and status pass and report the entry port. - chatgptDesktop.pacFallback joins the zod-only schema and the type. - The old app-server shim copy and the pre-lidge-jun#6365 intercept code from this branch are dropped in favour of dev's and lidge-jun#6365's. - PAC tests move to tests/clients/desktop-unblock-*; the guide and the structure doc describe PAC fallback.
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Summary
When the signed-in ChatGPT quota reads as exhausted, the Codex desktop app disables Send for every model, including ones opencodex routes to independently funded providers (#6196). On current macOS builds the app gets that gate from its bundled
codex app-serverover stdio JSON-RPC, so no network-side intercept can see it.This PR adds an experimental, macOS-only, default-off app-server shim, split out of #5947 by @lcxhh521:
ocx chatgpt launch | restore | status.launchrefuses unlesschatgptDesktop.appServerShim: true, writes a launcher, and relaunches ChatGPT withopen --env CODEX_CLI_PATH=<launcher>.restorerelaunches without it and deletes the launcher.execs the bundledcodexbinary unchanged (same pid, parent and code signature, so the app-tools pipe still accepts it) and pipes only its stdout throughocx internal chatgpt-app-server-filter.account/rateLimits/readresults andaccount/rateLimits/updatednotifications, clearing a plain-quotarateLimitReachedType/ordinaryUsageAllowed. Workspace, credit and spend-control reasons stay as sent, displayed usage percentages stay honest, and every other line passes through as the exact bytes received.--self-testfails, the launcher runs the original binary with untouched stdout. If the filter breaks mid-stream it switches to raw passthrough.Evidence: on 2026-10-01 TooSpace reported in #6196 that on a real Plus account with the 5-hour window at 100%, launching through this launcher re-enabled Send before the window reset, with no
dynamic_app_tools_peer_rejected. That run also had #5947's intercept enabled, so it does not isolate the shim as the sole cause.Design note: the 260928 maintainer design prefers an upstream provider-aware admission contract and rejects rewriting quota gate data. This PR is offered as an opt-in experiment because it is the only path with field evidence. Maintainers may close it against that decision.
Stack: this is the bottom of three split PRs (
devlog/_plan/261001_quota_send_lock_split). The local-CA intercept and the PAC fallback from #5947 are stacked on top of this branch as separate PRs, because all three extend the sameocx chatgptcommand andchatgptDesktopconfig block, and the PAC fallback has no function without the intercept listener.Security review requested per MAINTAINERS.md: this writes an executable launcher into the config dir and changes how the ChatGPT app starts its app-server. The launcher quotes every path, prints no environment, and is never created unless the flag is on and the user runs
ocx chatgpt launch.Refs #6196, #4878.
Co-authored-by: lcxhh521 59329914+lcxhh521@users.noreply.github.com
Verification
tests/clients/desktop-app-server-shim.test.ts(gate rewrite cases from feat(chatgpt-unblock): PAC-fallback mode so traffic survives opencodex stopping #5947, byte preservation, passthrough after rewrite failure),tests/clients/desktop-app-server-shim-launcher.test.ts(launcher quoting for source/compiled argv, fail-open on missing runtime and failed self-test, filtered output on success, termination when the filter exits),tests/clients/desktop-chatgpt-config.test.ts(default off, strict write rejection, non-macOS refusal, hidden self-test).Checklist
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