ProgrammingDig into the Claude Code source code: Buddy Virtual Pet, UltraPlan Multi-Agent and Hidden Architecture
Detailed analysis of TypeScript source code extracted from the npm bundle of Claude Code v2.1.89 --- revealing the Buddy virtual pet system with rarity RPG released on April 1, 2026, UltraPlan multi-agent architecture, Bridge remote session system, anti-canary obfuscation and dozens of hidden features that have not been documented.

