Lithtrix now exposes an optional Ed25519 passport beside your ltx_* key: deterministic did:lithtrix:<uuid>, public PEM material, and an explicit split between Lithtrix-derived lithtrix:* capability URIs and operator-authored self_reported labels (with a baked-in disclaimer so the two buckets are never conflated). Nothing about credits, tiers, or checkout is asserted on this JSON surface—it is identity + ergonomics for integrators exploring challenge-based ltx_session_* shells and public discovery, not a payment story.
Read the fuller framing on passports.html, the migration wording on docs.lithtrix.ai/passport-migration, and machine-readable endpoints in GET /v1/capabilities.