A chain-agnostic AI-native payment infrastructure, authz layer for x402

PropTech-specific profile of the AI Procurement Decision Card v0.3 vault contract. Names RESPA (12 CFR 1024), ECOA Reg B (12 CFR 1002), Fair Housing Act, HMDA, GLBA, MLS NAR + 2024 Settlement PII categories + 7-doctrine consent_basis_taxonomy. PropTech-readiness scaffolding, not certification.

HR Tech AI Procurement Decision Card v0.3 vault-contract profile naming 19 candidate-data categories + 7-doctrine consent_basis + 9 protection levels + ADA accommodation pathway 5-flag block + 7 vendor due-diligence artifacts. 6 categories default NOT a model input (biometric, credit, social, protected-class, accommodation, ADA-medical).

InsurTech AI Procurement Decision Card v0.3 vault-contract profile naming 15 insurance-data categories (ACORD + external consumer data + media + protected-class data) + 7-doctrine consent_basis + 9 protection levels + 5 vendor due-diligence artifacts. CO SB 21-169 protected-class default = NOT a model input.

FinTech AI Procurement Decision Card v0.3 vault contract profile. 17 financial-data categories + 10-doctrine consent_basis + 10 protection levels + 8 vendor due-diligence artifacts. Section 1071 demographic + ECOA protected-class default NOT a model input. Section 1033 portability window in retention envelope.

Generalized N-axis policy intersection resolver for KG Suite vault contracts. Extracted from DefenseTech's 3-axis resolvePolicy() so any vertical or buyer-composed multi-vertical contract can declare N axes and resolve to most-restrictive at runtime. MIT, zero deps.

GovTech AI Procurement Decision Card v0.3 vault contract profile. 15 government-data categories incl. classified + CUI clearance-gated + FOIA exemption tagging + LEP routing. REQUIRED ai_use_case_inventory_block (OMB M-24-10 Sec.3(a) encoded in Decision Card). 6 categories default NOT a model input.

DefenseTech Decision Card vault contract: FIRST Suite vault contract with 3 orthogonal typed policy axes (CUI categorization × export-control status × foreign-person restriction). resolvePolicy() intersects all 3 axes at runtime. Cross-binding centerpiece of the DefenseTech 6-pack.

Single-binary JWT validator + AI Procurement Decision Card v0.3 reveal-role enforcement gate. Verifies JWTs against JWKS, asks the buyer's signed Decision Card whether the principal's role may reveal the requested field, and emits hash-chained audit-stream events. First Go binary in the Kinetic Gain Protocol Suite.

Healthcare-specific profile of the AI Procurement Decision Card v0.3 vault contract — names HIPAA's 18 Safe Harbor identifier categories as concrete data_vault_targets exemplars + per-category default retention_envelope rules. HIPAA-readiness scaffolding, not certification.

EdTech-specific profile of the AI Procurement Decision Card v0.3 vault contract. Names FERPA's 7 PII categories (34 CFR §99.3) + COPPA's 10 PI categories (16 CFR §312.2, 2025 refresh) as concrete data_vault_targets exemplars + per-category retention rules. Four-doctrine consent_basis_taxonomy. EdTech-readiness scaffolding, not certification.

EnergyTech Decision Card vault contract profile: 20 grid-asset data categories × 5-tier BES categorization × 3-code OT/IT boundary × 12 protection levels (7 EnergyTech-unique). bes_cyber_system_categorization + ot_it_boundary as cross-repo binding enums with audit-stream + incident card. 5 unique runtime invariants.

Drop-in audit-stream + Decision Card vault contract SDK for B2B SaaS. Emit hash-chained Suite-compliant audit events, enforce vault contracts before AI tools touch sensitive data, validate Decision Cards. TypeScript-first, dual ESM/CJS, zero runtime deps. Apache-2.0.

LegalTech Decision Card vault contract profile: 18 attorney-client data categories × 8-value privilege_tier taxonomy × 10 protection levels. Drives resource.privilege_tier on the sibling matter-decision-record-audit-stream. 4 LegalTech-unique runtime invariants incl cross-matter-firewall + opposing-party-quarantine.

Node.js reference implementation of the fhir-resource-access-audit spec: HAPI FHIR R4 → HIPAA Safe-Harbor vault contract → hash-chained Suite audit-stream → self-verifies against the spec's own JSON Schema. Proves the spec is implementable end-to-end. AGPL-3.0.

Ink! contracts for a collateralized TUSDT system with vault borrowing, interest accrual, and liquidation auctions.

📊 Explore LedgerFlow, a Python project that showcases an Event-Sourced Ledger architecture using Kafka, adhering to CQRS principles for robust data management.