Reverse-engineering the Claude Android app turns up an is_ant flag gating a full internal debug menu

nima-ahmadi.github.io (via r/ClaudeAI)·medium signalXBlueskyLinkedInCopy link

A writeup published 2026-09-10 and surfaced on r/ClaudeAI documents a SharedPreferences key called `is_ant`, set by checking whether the account email ends in @anthropic.com, which unlocks a hidden internal settings menu. The menu exposes a jank overlay built on JankStats and FrameMetrics, an Age Signal override for testing, GrowthBook feature-flag overrides, network simulation that injects latency and forces request failures, and an API endpoint selector offering Production, Staging, Localhost or a custom backend. Staging itself is behind Cloudflare Access. The author says the feature flags hint at unshipped experiments and is saving that for a follow-up post.