New strings in the Claude code binary suggest updates to plugin management, UI notificatio

EXHIBIT 1842 · URGENT

Oct 4, 2026 01:40 UTC binary @anthropic-ai/claude-code-darwin-arm64

New strings in the Claude code binary suggest updates to plugin management, UI notifications, and error handling, alongside a new model ID reference and endpoints.

READY TO POST:

anthropic's claude-code binary just got an update with new strings pointing to enhanced plugin interactions, ui toasts, and more robust error handling. seems like dev experience is getting some love.

a new model id and several api endpoints found in the latest claude-code binary. anthropic seems to be baking in some interesting changes for how plugins and ui elements will communicate.

⚠️ FROM COMPILED BINARY — lower confidence, verify before posting. (May include bundled-dependency strings, not just first-party changes.) @anthropic-ai/claude-code-darwin-arm64 2.1.288 -> 2.1.289: +11248 strings, -10728 strings, 22 interesting [model_id] (1) + /$bunfs/root/claude-code.d.ts-30639c1e.txt.zst [feature_flag] (14) + <${n6}>No completion record was found for them in the previous session. ${h} Task ids in this notification beginning with "${je}" are internal scan markers, not tasks.</${n6}> + @internal False when the engine has no such Client drawn; nothing ran. True once the owning plugin's hooks have run, whether or not it has any. + @internal Fire-and-forget push from a headless session for one `$.ui.toast(text)`: what the REPL shows on the notification bar under the prompt for a few seconds, under the plugin's name. Be ready for a plugin's toasts at no fixed rate; nothing counts how many a plugin has shown. + @internal How long the REPL would keep it on the notification bar: the plugin's `timeoutMs`, or the engine's default (4000). + @internal Present when a plugin wrote state (`$.state.set`) that these instances read while they were drawn, or a `Client` drawn in them failed and its plugin heard it (`ui.fault`), and nothing else moved: only they are stale, and the surface may re-ask them alone. Absent, every mounted instance may + @internal The answer to ui_read_selection: the selection, or an empty object for nothing selected. + @internal The line the plugin gave: be ready for up to 10000 characters of it and then an ellipsis. Plain text: draw it as a text node, never as markup.v + @internal The plugin's pinned line, replacing its previous one; null removes it. Be ready for up to 10000 characters of it and then an ellipsis. Plain text: draw it as a text node, never as markup. + @internal The selected text as the person sees it: what a copy would put on the clipboard. Left out, or empty, when nothing is selected. + @internal T