Prism reads your live Crossdeck workspace — revenue, entitlements, errors, analytics, read-cost and customer identity — joined BY IDENTITY, so it answers cross-layer questions no single-layer tool can: which paying customers an error hit and what they pay, who costs the most in database reads, and your lifetime-value leaderboard by name. Secure and read-only: OAuth 2.0 sign-in (no key to paste), no write path, and every number is self-describing (it reports 'not instrumented' rather than a fake zero for an un-wired surface).