If you are trying to install a specific mod and getting an error about "Obfuscate," you can find the legacy files on CurseForge .
Version 0.2.1 is, by semantic versioning conventions, an early-stage release. The leading zero signals that the author does not yet promise production-grade stability. Yet, in the world of obfuscation, this is appropriate. Obfuscation is by nature adversarial; it does not seek to be robust in a vacuum, but robust against a constantly evolving class of deobfuscation tools. A 0.x.x release acknowledges this ephemeral stability. obfuscate 0.2.1