sporeprint: add validation summary for primals.eco publishing

New sporeprint/validation-summary.md with Zola front matter — 73 tests,
4 crates, cryptographic commitment system.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: eastgate

sporeprint/validation-summary.md

@@ -0,0 +1,57 @@
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+title = "bingoCube Validation Summary"
+description = "Human-verifiable cryptographic commitment system — cross-bound bingo boards, progressive reveal, evolutionary reservoir computing. 73 tests, pure Rust."
+date = 2026-05-20
+
+[taxonomies]
+primals = ["bingocube"]
+springs = []
++++
+
+## Status
+
+- **Gate**: CLEAR (ecosystem library/tool — no IPC, MethodGate N/A)
+- **Phase**: N/A (library crates, no runtime server)
+- **Edition**: 2024
+- **Tests**: 73 passing (15 core, 7 adapters, 31 nautilus, 1 doctest, 19 integration)
+- **Coverage**: 83.4% line (tarpaulin, fail-under: 60%)
+- **Clippy**: 0 warnings (`pedantic` + `nursery`, `-D warnings`)
+- **Unsafe**: zero (`forbid(unsafe_code)` workspace-wide)
+- **Pure Rust**: No C dependencies (blake3, rand/rand_chacha, serde, egui optional)
+
+## Key Concepts
+
+| Concept | Description |
+|---------|-------------|
+| **Board** | L x L grid with column-range constraints, ChaCha20 RNG |
+| **Scalar field** | BLAKE3 hash of board cell pairs mapped to u64 |
+| **Color grid** | Scalar field mod palette_size for visual rendering |
+| **SubCube** | Progressive reveal at level x in (0,1] — top-x% cells by scalar value |
+| **Nautilus Shell** | Population of boards evolved via selection/crossover/mutation |
+
+## Crates (4)
+
+| Crate | Role | Type |
+|-------|------|------|
+| `bingocube-core` | Two-board cross-binding, scalar field, color grid, subcube reveal | library |
+| `bingocube-adapters` | Visual (egui), audio, animation adapters | library (feature-gated) |
+| `bingocube-demos` | Interactive egui demo binary | binary |
+| `bingocube-nautilus` | Evolutionary reservoir computing via board populations | library |
+
+## Composition Role
+
+bingoCube is an **ecosystem library** — not part of runtime compositions.
+It provides human-verifiable commitment artifacts that primals and springs
+consume as a Rust crate dependency. The visual commitment system enables
+cryptographic proofs that humans can visually verify without tooling.
+
+## Downstream Consumers
+
+- bearDog (commitment artifact generation)
+- lithoSpore (visual provenance verification)
+- primalSpring (deployment commitment proof)
+
+## Degradation
+
+bingoCube is a library — no runtime degradation mode. Consumers link
+against it at compile time; no IPC dependency.