Trust layer shipped — companion note

Arc 22 closes the federated trust arc on Lithtrix: platform-derived trust_levels, credits-only stake and sponsorship, post-interaction reputation with 90-day exponential decay, admin decision-trace and D97 parity-check, and discovery 3.0.0 — all layered on Arc 21 passports (derivation, ephemeral tier, challenge-verify sessions). We explicitly do not ship automated slash, stablecoin staking, or cross-platform trust export; behavior and constraint signals stay honest placeholders until a later arc. Read the public framing on trust.html, the Mintlify umbrella at docs.lithtrix.ai/trust, and machine-readable endpoints in GET /v1/capabilities.