nf.epistemic.freshness

Freshness Normal Form (FNF)

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

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1. Executive Summary & Metadata

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

Property	Value
Canonical ID	nf.epistemic.freshness
Short Name	FNF
Full Name	Freshness 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 (FNF Candidate)	Anomaly risk: timeless truth
2. Normalization / Gate	FNF Verification Gate	every read declares tempo... (certified_implies_authorized: false)
3. After / Certified Output	Certified FNF Output	Invariant: ['read_timestamp', ; 'replica_lag', 'cache_age', ; 'invalidation_status',...

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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.freshness
Pillar I: Excludes Anomaly	Name and eliminate a specific class of data or state defects.	timeless truth
Pillar II: Preserves Invariant	State the structural invariant and protected skeleton preserved across transitions.	Invariant: every read declares temporal boundary and invalidation status Protected Skeleton: ['read_timestamp', 'replica_lag', 'cache_age', 'invalidation_status', 'freshness_sla']
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 replace BQNF repair decision

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5. Operational Verification & Terminal Routing

5.1 Required Declarations

• read_timestamp
• replica_lag
• cache_age
• invalidation_status
• freshness_sla

5.2 Required Evidence

• clock_source
• lag_metrics from replica or cache layer

5.3 Validation Criteria

Criterion ID	Name	Condition
criterion	Check	query result never served without read_timestamp
criterion	Check	SLA breach terminalizes or escalates
criterion	Check	pairs with BQNF Invalidate when cache stale

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
Fresh	Preserve
Stale	Escalate
LagExceeded	Invalidate
Invalidate	Invalidate
Refuse	Refuse

5.5 Declared Failure Modes

All defects route explicitly through the Terminal Route Map above.

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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.freshness (FNF) against its declared schema, boundary constraints, and witness obligations in this model.
   • Supports deterministic terminal routing (Fresh, Stale, LagExceeded, Invalidate) 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 timeless truth is either excluded under every read declares temporal boundary and invalidation status 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.freshness.

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

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

schema_version: smplx.nf.contract.v0
contract_kind: normal_form_contract
identity:
  id: nf.epistemic.freshness
  name: Freshness Normal Form
  short_name: FNF
  version: v0
  status: draft
  family: epistemic
  theory_status: proposed
  contract_status: draft
  verification_status: absent
classification:
  hierarchy_level: normal_form
  subject_kind:
  - distributed_claim
  - query_shape
  data_posture: in_motion
  mathematical_posture: operational
purpose:
  excludes_anomaly: timeless truth
  preserves_invariant: every read declares temporal boundary and invalidation status
  protected_skeleton:
  - read_timestamp
  - replica_lag
  - cache_age
  - invalidation_status
  - freshness_sla
  erased_structure: []
  non_claims:
  - does not replace BQNF repair decision
declarations_required:
- read_timestamp
- replica_lag
- cache_age
- invalidation_status
- freshness_sla
evidence_required:
- clock_source
- lag_metrics from replica or cache layer
validation_criteria:
- query result never served without read_timestamp
- SLA breach terminalizes or escalates
- pairs with BQNF Invalidate when cache stale
proof_obligations: []
terminal_routes:
- Fresh
- Stale
- LagExceeded
- Invalidate
- Refuse
certification:
  certificate_required: true
  certificate_kind: freshness_packet
  obstruction_class_required: false
  loss_ledger_required: false
  verifier_required: true
authorization:
  authorized_by: null
  certified_implies_authorized: false
references:
- ../1_normal_forms.md
- ../1a_bqnf_incremental_repair.md
terminal_route_map:
  Fresh: Preserve
  Stale: Escalate
  LagExceeded: Invalidate
  Invalidate: Invalidate
  Refuse: Refuse
definition:
  source: coda_all_universe/mssn_sn_tower/definitions.md
  formal_statement: timeless truth. every read declares temporal boundary and invalidation
    status
  quadrilateral:
    qualifies_as_true_normal_form: false
    qualification_gap: reconstruction_is_not_a_relational_project_join
    anomaly_exclusion: timeless truth
    lossless_join:
      status: declared_reconstruction
      statement: every read declares temporal boundary and invalidation status
    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