The Principle
v2.2 promises universal parse and profile-relative compression, not universal token equivalence. The parser works everywhere. Compression efficiency varies by profile.Three Tiers
Universal-safe (all families):| : . + $ @ # ! OBS INF CON MRG SEK YLD PRD
Likely safe (profile-dependent): ~ ^ ID: <- => up down EQ
Not portable (legacy only): π ← → ↑ ↓ µ τ ×