Leaked Claude Code CLI source reveals hidden features and internal flags

Hidden features and internal flags discovered in leaked source

Someone has leaked the TypeScript source code for Claude Code CLI, revealing approximately 1,884 files containing build-time feature flags and internal functionality not present in public builds.

Key feature flags found in the codebase

• BUDDY — A Tamagotchi-style AI pet that lives beside your prompt. Includes 18 species (duck, axolotl, chonk...), rarity tiers, and stats like CHAOS and SNARK. Teaser drops April 1, 2026 (likely an April Fools' egg in the codebase).
• KAIROS — Persistent assistant mode where Claude remembers across sessions via daily logs, then "dreams" at night. A forked subagent consolidates your memories while you sleep.
• ULTRAPLAN — Sends complex planning to a remote Claude instance for up to 30 minutes. You approve the plan in your browser, then "teleport" it back to your terminal.
• Coordinator Mode — Already accessible via CLAUDE_CODE_COORDINATOR_MODE=1. Spawns parallel worker agents that report back via XML notifications.
• UDS Inbox — Multiple Claude sessions on your machine can talk to each other over Unix domain sockets.
• Bridge — claude remote-control lets you control your local CLI from claude.ai or your phone.
• Daemon Mode — claude ps, attach, kill — full session supervisor with background tmux sessions.

Additional findings

The analysis also revealed:

• 120+ undocumented environment variables
• 26 internal slash commands including /teleport, /dream, /good-claude
• GrowthBook SDK keys for remote feature toggling
• USER_TYPE=ant which unlocks everything for Anthropic employees

These findings provide insight into internal development and potential future features of Claude Code CLI.