V2F Engine

Deterministic Payer Rules Execution Infrastructure

Purpose

The V2F Engine is a deterministic rules execution system operated by Manna Corp.

It processes payer-defined rules exactly as supplied, producing consistent and reproducible outputs from identical inputs. The system introduces no interpretation, discretion, or outcome evaluation.

V2F exists to enforce rules-in, rules-out determinism within an immutable audit boundary.

What the System Does

• Executes payer rules exactly as provided
• Produces identical outputs for identical inputs
• Enforces an immutable, read-only audit boundary
• Cryptographically signs execution artifacts
• Preserves execution records without human modification

The system performs no judgment, validation, or correctness assessment of the rules themselves.

What the System Does Not Do

• Guarantee claim approval
• Guarantee reimbursement outcomes
• Assert payer rule accuracy
• Modify, optimize, or interpret payer logic
• Provide medical, billing, or legal advice
• Replace payer determinations
• Introduce human intervention into execution or audit records

All outcomes remain subject to payer policies and external decision processes.

Deterministic Execution Model

V2F operates under a strict deterministic execution model:

• Identical rule sets and identical inputs produce identical outputs
• Execution paths are fixed and reproducible
• No probabilistic, heuristic, or adaptive logic is used
• No machine learning or inference layers are present

This ensures predictable, auditable, and verifiable behavior over time.

Immutable Audit Boundary

All rule executions occur within an immutable audit boundary.

Characteristics include:

• Read-only execution logs
• Cryptographic hash signatures for verification
• Tamper-evident record preservation
• No post-execution mutation
• No human write access after execution

Once executed, audit records cannot be altered, revoked, or retroactively corrected.

Audit records exist solely to prove what occurred, not to justify or modify outcomes.

Cryptographic Integrity

Each execution artifact is cryptographically hashed and signed.

This enables:

• Verification of execution integrity
• Detection of tampering or alteration
• Independent confirmation of rule-to-output consistency
• Long-term audit durability

Cryptographic integrity applies to execution fidelity, not to payer rule correctness.

Subscription and Access Governance

Access to the V2F Engine is governed through subscription authorization.

Subscriptions define:

• Authorized facilities
• Permitted execution scope
• Update eligibility
• Audit retention boundaries

In the event of a subscription lapse:

• Execution may be restricted
• Audit records remain preserved
• Historical data remains accessible in read-only form
• No audit data is deleted or altered due to administrative status changes.

Deployment Context

V2F is deployed in environments where:

• Deterministic execution is required
• Auditability is mandatory
• Human intervention must be eliminated
• Reproducibility is more important than interpretive flexibility

Typical deployments include multi-facility healthcare organizations and payer-adjacent operational teams.

Institutional Constraint Statement

V2F does not promise correctness.

V2F does not promise outcomes.

V2F does not promise approvals.

V2F promises only this:

The same rules, executed the same way, will produce the same outputs every time, with immutable cryptographic proof of execution.