nf.epistemic.snnf

Stripe Normal Form (SnNF)

Contract ID: nf.epistemic.snnf | Family: epistemic | Index Status: draft | AuthorityEffect: None

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1. Executive Summary & Metadata

Stripe Normal Form (SnNF) enforces structural normalization and explicit defect routing in the epistemic regime.

Property	Value
Canonical ID	nf.epistemic.snnf
Short Name	SnNF
Full Name	Stripe Normal Form
Family	epistemic (Observer-Relative Epistemic, Freshness, Context, Provenance & Distinguishability Contracts)
Qualification	Extended Form Contract (Normal Form Contract)
Data / Math Posture	in_motion
Index Status	draft
Theory Status	proposed
Verification Status	absent
Contract Version	v0
Governance Fence	AuthorityEffect: None (certified_implies_authorized: false)

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2. Visual Architecture & Normalization Diagram

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3. Concrete Worked Example & Mechanism

Visual Transition Summary

Stage	Carrier / Operator	Concrete State / Invariant
1. Before / Candidate Input	Input Carrier (SnNF Candidate)	Anomaly risk: unlocatable ; survivability
2. Normalization / Gate	SnNF Verification Gate	every logical object... (certified_implies_authorized: false)
3. After / Certified Output	Certified SnNF Output	Invariant: ['shards', ; 'erasure_fragments', ; 'parity_layout',...

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4. The Four-Pillar Quadrilateral & Non-Claims

Every contract in simplex-normal-forms is evaluated against the Four-Pillar Quadrilateral defined in contracts/_golden_nfs/standard.yaml:

Pillar	Requirement	Contract Specification for nf.epistemic.snnf
Pillar I: Excludes Anomaly	Name and eliminate a specific class of data or state defects.	unlocatable survivability
Pillar II: Preserves Invariant	State the structural invariant and protected skeleton preserved across transitions.	Invariant: every logical object declares shards, erasure fragments, parity layout, encryption domains, and failure groups Protected Skeleton: ['shards', 'erasure_fragments', 'parity_layout', 'encryption_domains', 'failure_groups']
Pillar III: Lossless Reconstruction	State the non-loss reconstruction operator (join, direct sum, pullback, or replay).	Lossless reconstruction under declared projection, direct sum, or pullback operators.
Pillar IV: Syntactic Decidability	State how conformance is decided from declared constraints without unbudgeted scans.	Decidable from declared schema and witness metadata within bounded evaluation budgets.

Explicit Non-Claims (certified_implies_authorized: false)

• does not prevent physical media degradation or network outages

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5. Operational Verification & Terminal Routing

5.1 Required Declarations

• shards
• erasure_fragments
• parity_layout
• encryption_domains
• failure_groups

5.2 Required Evidence

• checksums_per_fragment
• placement_witnesses
• encryption_key_handles

5.3 Validation Criteria

Criterion ID	Name	Condition
criterion	Check	logical objects must specify exact shard or erasure layout
criterion	Check	encryption domains must be declared per fragment
criterion	Check	failure groups must map to independent physical failure modes

5.4 Terminal Route Map

Every evaluation terminates in a declared local route mapped to a canonical terminal in standard.yaml:

Local Terminal Route	Canonical Terminal
StripedAndReplicated	Preserve
DegradedDurability	Escalate
SurvivabilityUnknown	BudgetUnknown
DecryptionKeyMissing	BudgetUnknown
ParityMismatch	Reject
Refuse	Refuse

5.5 Declared Failure Modes

• symptom: data is claimed durable without declaring shard layout or survived failure modes, diagnosis: unlocatable survivability, terminal: SurvivabilityUnknown

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6. Epistemic Claim Hygiene Quadrant

In accordance with the repository's epistemic claim discipline:

1. What it supports:
   • Supports syntactic and operational checking of nf.epistemic.snnf (SnNF) against its declared schema, boundary constraints, and witness obligations in this model.
   • Supports deterministic terminal routing (StripedAndReplicated, DegradedDurability, SurvivabilityUnknown, DecryptionKeyMissing) when required declarations or invariants fail.
2. What it does not support:
   • Does not confer operational authority (AuthorityEffect: None, certified_implies_authorized: false).
   • Does not claim semantic truth of undeclared external processes or unverified upstream inputs beyond the declaredprotected skeleton.
3. The narrowest defensible claim:
   • Within the declared substrate in_motion, this contract enforces that unlocatable survivability is either excluded under every logical object declares shards, erasure fragments, parity layout, encryption domains, and failure groups or routed to an explicit refusal/recovery terminal.
4. The next test needed:
   • Property-based falsification and mutation testing across boundary edge cases and composed multi-step pipelines for nf.epistemic.snnf.

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7. Canonical YAML Contract (contracts/nf.epistemic.snnf.yaml)

Click to expand full canonical YAML contract (contracts/nf.epistemic.snnf.yaml)

schema_version: smplx.nf.contract.v0
contract_kind: normal_form_contract
identity:
  id: nf.epistemic.snnf
  name: Stripe Normal Form
  short_name: SnNF
  version: v0
  status: draft
  family: epistemic
  theory_status: proposed
  contract_status: draft
  verification_status: absent
classification:
  hierarchy_level: normal_form
  subject_kind:
  - distributed_claim
  data_posture: in_motion
  mathematical_posture: operational
purpose:
  excludes_anomaly: unlocatable survivability
  preserves_invariant: every logical object declares shards, erasure fragments, parity
    layout, encryption domains, and failure groups
  protected_skeleton:
  - shards
  - erasure_fragments
  - parity_layout
  - encryption_domains
  - failure_groups
  erased_structure:
  - physical_disk_blocks
  - raw_block_offsets
  non_claims:
  - does not prevent physical media degradation or network outages
declarations_required:
- shards
- erasure_fragments
- parity_layout
- encryption_domains
- failure_groups
evidence_required:
- checksums_per_fragment
- placement_witnesses
- encryption_key_handles
validation_criteria:
- logical objects must specify exact shard or erasure layout
- encryption domains must be declared per fragment
- failure groups must map to independent physical failure modes
proof_obligations: []
terminal_routes:
- StripedAndReplicated
- DegradedDurability
- SurvivabilityUnknown
- DecryptionKeyMissing
- ParityMismatch
- Refuse
certification:
  certificate_required: true
  certificate_kind: stripe_certificate
  obstruction_class_required: false
  loss_ledger_required: false
  verifier_required: true
authorization:
  authorized_by: null
  certified_implies_authorized: false
failure_modes:
- symptom: data is claimed durable without declaring shard layout or survived failure
    modes
  diagnosis: unlocatable survivability
  terminal: SurvivabilityUnknown
references:
- ../1_normal_forms.md
terminal_route_map:
  StripedAndReplicated: Preserve
  DegradedDurability: Escalate
  SurvivabilityUnknown: BudgetUnknown
  DecryptionKeyMissing: BudgetUnknown
  ParityMismatch: Reject
  Refuse: Refuse
definition:
  source: coda_all_universe/mssn_sn_tower/definitions.md
  formal_statement: unlocatable survivability. every logical object declares shards,
    erasure fragments, parity layout, encryption domains, and failure groups
  quadrilateral:
    qualifies_as_true_normal_form: false
    qualification_gap: reconstruction_is_not_a_relational_project_join
    anomaly_exclusion: unlocatable survivability
    lossless_join:
      status: declared_reconstruction
      statement: every logical object declares shards, erasure fragments, parity layout,
        encryption domains, and failure groups
    dependency_preservation:
      status: declared_with_the_invariant
      statement: The preserved invariant stays on the declared schema. This form does
        not state a functional-dependency projection of a flat relvar decomposition.
    syntactic_decision:
      status: declaration_decidable
      statement: The check reads the declared constraints and validation criteria.
        One unrecorded runtime image is not the decider.
schema_ref: ./normal_form_contract_schema.yaml