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Feature Scope

This document defines the user-facing feature paths currently exposed by codexfast.

Use it when you need a quick answer to "what does this repo actually enable?" before reading bundle-specific notes.

Delivery Modes

  • launch is the public runtime path. It starts Codex with a local CDP endpoint and applies the supported target patches in memory for that launched session only.
  • Runtime launch does not modify app.asar, Info.plist, the app bundle, or the app signature.
  • Legacy bundle patch commands and internal file-patch/restore flows have been removed.
  • If a user previously installed the launchd auto-repair watcher, launch removes the legacy watcher files before starting Codex.

Current Feature Set

Settings-side Fast control

  • Exposes the Fast-related control in Codex Settings on supported builds.
  • This is the Settings/UI path for the Fast feature set.

Composer /fast slash command

  • Exposes the /fast slash command in the composer.
  • This is the prompt-side command path for enabling or disabling Fast mode during composition.

Composer Speed menu

  • Exposes the composer-side Speed menu.
  • On 26.415.40636 and 26.417.41555, this is the Add files and more / + Speed submenu.
  • On 26.422.21637, 26.422.30944, 26.422.62136, 26.422.71525, 26.429.20946, 26.429.30905, 26.429.61741, 26.506.21252, 26.506.31421, 26.513.20950, 26.513.31313, 26.519.22136, 26.519.31651, 26.519.41501, 26.519.81530, and 26.527.31326, this is the composer Intelligence dropdown Speed submenu.
  • On supported builds this menu should surface Standard and Fast.

Plugins sidebar access for custom API users

  • Exposes the Plugins sidebar/page access path for custom API users on supported builds.
  • This removes the relevant auth-method gates for API-key users. On newer builds this includes the sidebar entry, the /skills Plugins page content gate, plugin detail deep-link redirects, the aggregate connector-unavailable install block, and the install-modal disclosure-only content gate when present.
  • On 26.513.20950 and 26.513.31313, this also keeps the composer @ plugin mention list from requesting the remote shared-with-me plugin catalog, so local and already available plugin mentions can load under API-key auth.
  • This does not guarantee that every plugin or connector flow is available. Plugin state, connector runtime behavior, or admin-side restrictions may still block a specific plugin.
  • This does not unlock the remote ChatGPT shared plugin marketplace; that catalog still requires ChatGPT authentication.

GPT-5.5 model-list entry for custom API users

  • Exposes GPT-5.5 in the app model list on supported builds when the bundled model catalog does not include it.
  • On 26.422.21637, the app filters the raw model/list response into modelsByType before rendering menus, so the patch also preserves the injected entry after that query selector filter.
  • On 26.422.30944 and later builds, GPT-5.5 is expected to be visible through the official app path. codexfast skips GPT-5.5 runtime targets from that version onward.
  • This injects the UI catalog metadata only. The configured custom API provider must still accept gpt-5.5 at request time.
  • This does not replace the app's model execution path or make Codex merge arbitrary custom provider /v1/models responses into the UI catalog.

Scope Rules

  • Settings-side Fast control, composer /fast, and the composer-side Speed menu should be treated as one combined Fast feature set.
  • Plugins support should not be described as available unless the sidebar/page gates still work cleanly on the target build.
  • GPT-5.5 model-list support should not be described as provider support. It is only a UI catalog entry.
  • Compatibility claims must also match docs/compatibility-matrix.md and the strict whitelist in src/supported-app-versions.mts.