@fabric_v1/compiler/FAB-RFC-0002 Atom-Level Execution &.txt

Fabric DSL compiler (parser, checker, IR & backends)

FAB-RFC-0002: Atom-Level Execution & Provenance

Title: FabricAtom-Based Execution and Bit-Level Provenance

Authors: Shawn Blackmore (Atomic Limited)Status: DraftVersion: 1.0.0Created: 2025-07-24

Summary

This RFC proposes a foundational extension to Fabric 1.0 introducing FabricAtom as the atomic unit of execution, audit, and memory. This allows .fab modules to be compiled into atomic arrays where each byte is split into immutable protons and mutable electrons. The system enables:

Bit-level provenance tracking

Policy-enforced mutation control

Probabilistic modeling and quantum-class behavior

Microtransaction-based royalty and audit accounting

Motivation

Fabric 1.0 provides block-level provenance, but this RFC introduces bit-level trust, enabling:

Detection and rollback of unauthorized state mutations

Cryptographically verifiable computation per bit

Fine-grained energy budgeting and fairness enforcement

A universal substrate for quantum-style computation

1. DSL Grammar Extensions

1.1 New Type: FabricAtom

// Defines a bit-level atomic memory cell
struct FabricAtom {
  protons: Bit[8],      // Immutable at runtime, compiled & signed
  electrons: Bit[8],    // Mutable runtime state
  policy: {
    privacy: anonymized,
    integrity: immutable,
    energy_budget: 1J
  }
}

1.2 Usage in Agent Definitions

agent QuantumGuard {
  id: "agent-uuid4"
  model_id: "guard-model:1.0.0"
  inputs: [FabricAtom[]]
  outputs: [FabricAtom[]]
  fallback: LocalSimulator { state:preserve }
}

2. Compiler Phase Additions

2.1 Atomization Phase

Bytecode output from Fab AST is decomposed into FabricAtom[]

Protons generated from original source byte values

Electrons initialized to default mutable state (0 or mirrored)

2.2 Mutation Policy Linking

Policies attached per FabricAtom

Policy DSL validated against integrity/fairness/privacy schemas

Generates Merkle signature for proton hash at compile time

2.3 Entanglement Analysis (optional)

Cross-agent FabricAtom references generate entanglement graphs

Enforced at runtime by QuantumCoordinationBlock

3. Runtime Memory Model

3.1 Atomic Memory Space

struct RuntimeAtom {
  Protons   [8]bool  // fixed, signed
  Electrons [8]bool  // mutable, bitwise addressed
  Policy    AtomPolicy
  Hash      []byte   // SHA256(Protons)
  ID        string   // Atom ID (UUID)
}

Protons: never mutated, enforced by policy kernel

Electrons: writable, but logged in audit stream

ID: deterministic from module + offset

3.2 Access Semantics

Read: electrons[i]

Write: only allowed if policy permits mutation and is logged

4. Policy Enforcement Logic

4.1 Enforcement Points

Write attempt on electrons triggers:

Policy check (integrity, privacy, fairness)

Energy budget decrement

Provenance event

4.2 Violation Handling

Policy breach → error code (FAB_6001)

Execution blocked or fallback agent invoked

Audit trail records attempted mutation

4.3 Audit Example

{
  "atom_id": "agent-xyz::offset-12",
  "bit_index": 6,
  "old_value": 0,
  "new_value": 1,
  "timestamp": "2025-07-24T11:00:00Z",
  "policy_violated": false,
  "signature": "HMAC(...)"
}

5. Storage Layer Design: Merkle-Atom DAGs

5.1 DAG Structure

Each FabricAtom is a leaf node

DAG groups atoms by:

agent

block

execution round

5.2 Integrity Guarantees

SHA256(protons) → proton_hash

DAG node: { atom_id, hash, parent_hashes[] }

DAG signed and stored in Provenance Ledger

5.3 Snapshot + Recovery

Snapshots of atom groups stored at:

planStart, planCommit, planFinish

Any mutation delta can be reversed using DAG path

6. Future Extensions

QuantumBitArray type with probabilistic electrons[i] ∈ [0,1]

Visual Atom Viewer in Fabric VS Code extension

Atomic micro-royalty engine (0.00001 FAB / bit mutated)

7. Backward Compatibility

All Fabric 1.0 .fab files remain valid

Atomization is opt-in via fab build --atomized

Mixed execution supported: classical + atomized

8. References

RFC-0001: Governance

Fabric DSL Grammar (fabric.rst)

Fabric Provenance Ledger Spec

SGX Attestation APIs

HMAC RFC 2104

9. Status

This RFC is open for review by the Fabric Steering Committee. Once approved, it will be integrated into the Fabric 1.1 specification.

Appendix A: Visual Diagram (TBD)

Agent → ExecutionBlock → Atom DAG → Provenance Ledger