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title PTI Reference Implementation
description TumiTrust as the first production reference implementation of Portable Trust Infrastructure.
sidebar_position 3
slug /pti/reference-implementation/
displayed_sidebar ptiSidebar
hide_title true
hidePtiSpecIdentity true

Reference implementation

TumiTrust: The PTI Reference Implementation

A production deployment that demonstrates how PTI principles operate under real load — not a substitute for the open specification.

Production Founding steward

A reference implementation demonstrates that a specification is implementable, operable, and useful at scale. It contributes operational learnings to RFCs and specification revisions.

TumiTrust provides the first commercial reference implementation of PTI. Future PTI-compatible implementations may adopt different architectures, languages, and deployment models while conforming to the same RFCs and profiles.

What TumiTrust demonstrates

PTI concept Reference capability
Trust profiles Subject and institution views of graph-backed trust state
Trust events Partner webhook, API, and CSV ingest channels
Trust graphs Relationship-aware resolution and signal materialization
Identity resolution Entity-to-pti_id mapping — RFC-011
Trust contexts 20+ documented primaries and lenses — catalogue
Trust lookup API Institution decision-time intelligence — RFC-004
Explainability Drivers, provenance, and coverage gaps on outcomes
Governance Consent, retention, and audit aligned with RFC-007

Platform capabilities

  • Trust Platform API — search, generate, poll, webhooks for institutions and partners
  • Partner connectors — configurable screening and event ingest
  • Institutional integrations — lookup studio, reports, packages, sovereign deployments
  • Developer infrastructure — OpenAPI, sandbox keys, conformance-oriented integration paths
  • Operational runbooks — production feedback into specification design

Product documentation describes how TumiTrust implements PTI:

Specification documentation describes what any compatible implementation must do:

Relationship to the specification

flowchart LR
  RFC["PTI RFCs"]
  SPEC["Specification v1.0"]
  TT["TumiTrust platform"]
  OTHER["Future implementations"]
  RFC --> SPEC
  SPEC --> TT
  SPEC --> OTHER
  TT -->|feedback| RFC
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When TumiTrust behavior diverges from published RFCs, the RFCs govern compatibility claims until amended through governance.

Becoming a reference implementation

Implementers may apply for reference listing when they:

  1. Achieve PTI Core Certified or higher
  2. Operate production traffic for ≥12 months
  3. Publish anonymized operational metrics
  4. Participate in RFC review for dependencies

See Reference implementations (governance) and Reference implementation policy.

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