SilverSight/scripts/qc_flag/mutations/B001_HachimojiN8Bridge.lean
allaun cf6096882f chore: commit all pending work from prior sessions
Includes:
- n-dimensional generic modules (BraidStateN, MatrixN, SpectralN,
  ClassifyN, FisherRigidityN, FixedPointBridge)
- Feasible Set Theorem proofs + QUBO relaxation
- Anti-smuggle protocol (seedlock, mutation testing, cross_validate,
  qc_flag, symbol verification)
- Q16_16 bridge with quad matrix representation
- Infrastructure scripts (entry gate, determinism checks)
- Test suites for Lean modules, scripts, and QUBO pipeline
- FixedPoint migration and HachimojiN8 updates
- Documentation updates (ARCHITECTURE, GLOSSARY, DOCUMENT_SETS)
- QUBO conflict sweep and FSR validation
- GitHub Actions anti-smuggle workflow

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/-
HachimojiN7Bridge.lean — Cross-check: HachimojiBase.card_eq ↔ n7_necessity
These two facts exist in separate modules:
- HachimojiBase.card_eq : Fintype.card HachimojiBase = 7 (CoreFormalism)
- HachimojiN7.n7_necessity : ∀ N, allOk N ↔ N = 7 (SilverSight)
They agree — but without this file they don't formally know about each other.
A session that modifies either (changes a predicate in n7_necessity, or adds a
constructor to HachimojiBase) breaks THIS theorem, providing a single point of
detection rather than two silently-diverging correct proofs.
Anti-drift role: this is the Ring 1 wire in the outward dependency spiral.
If it fails, stop and diagnose before touching anything downstream.
-/
import CoreFormalism.HachimojiManifoldAxiom
import SilverSight.HachimojiN7
open SilverSight.HachimojiN7
namespace SilverSight.HachimojiN7Bridge
-- ============================================================
-- §1 THE LINKING THEOREM
-- ============================================================
/-- The Hachimoji type's cardinality satisfies n7_necessity.
Proof: card_eq gives 7; n7_necessity gives allOk 7 = true.
If HachimojiBase gains or loses a constructor, card_eq changes,
allOk (new count) = false, and this theorem breaks. -/
theorem hachimoji_card_matches_necessity :
Fintype.card HachimojiBase = 7 ∧
allOk (Fintype.card HachimojiBase) = true :=
⟨HachimojiBase.card_eq, by rw [HachimojiBase.card_eq]; exact n7_satisfies⟩
/-- Equivalently: the cardinality is the unique value satisfying all three constraints.
This is the statement that the type IS the alphabet justified by n7_necessity. -/
theorem hachimoji_card_is_unique_valid :
∀ N : , allOk N = true ↔ N = Fintype.card HachimojiBase := by
intro N
rw [HachimojiBase.card_eq]
exact n7_necessity N
-- ============================================================
-- §2 WITNESS
-- ============================================================
-- Belt-and-suspenders: both proofs evaluate to the same nat
#eval Fintype.card HachimojiBase -- expect: 7
#eval allOk 7 -- expect: true
end SilverSight.HachimojiN7Bridge