docs: Update AGENTS.md with FisherRigidity module completion and build count

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5. **No `native_decide` unless required without alternative.** Use `norm_num`, `omega`, `simp`, `decide`, or explicit proof terms. `native_decide` is a last resort when no other tactic can close the goal. Document why `native_decide` is required when used. 5. **No `native_decide` unless required without alternative.** Use `norm_num`, `omega`, `simp`, `decide`, or explicit proof terms. `native_decide` is a last resort when no other tactic can close the goal. Document why `native_decide` is required when used.
5. **Build gate:** `lake build SilverSight` must pass (3307 jobs, 0 errors as of 2026-06-22). 5. **Build gate:** `lake build SilverSight` must pass (3328 jobs, 0 errors as of 2026-06-24).
6. **Every new module needs:** 6. **Every new module needs:**
- `@[simp]` theorems for key computations - `@[simp]` theorems for key computations
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## FisherRigidity — Parabola Focal-Chord to Fisher-Rao Bridge
**Purpose:** Bridges parabola focal-chord perpendicularity (s₁·s₂ = -1) to Fisher-Rao geometric rigidity and Hachimoji eigensolid braid dynamics.
**Key structures:**
- `ConjugatePair` — slope pair encoding perpendicularity
- `IsOrthogonal` — Fisher inner product vanishing predicate
- `eigensolidSpectralGap` — 9984 Q16.16 (≈0.152), near 1/7 threshold
**Eval witnesses:**
- `parabolaConjugatePair one` → { slope_large := 158217, slope_small := -27147 }
- `eigensolidSpectralGap` → 9984
- `div eigensolidSpectralGap 65536` → 9984 (0.152 normalized)
## BMCTE Eigensolid Threshold (p/N = 1/7) ## BMCTE Eigensolid Threshold (p/N = 1/7)