D-GSO-6: deterministic, versioned recipe selector (P6)

.claude/board/STATUS_BOARD.md

@@ -31,8 +31,8 @@ Plan: `.claude/plans/2026-10-06-global-sudoku-replayable-orchestration-v1.md`. O
 | **D-GSO-2** | P2: one-hop Moore local-plasticity probe (neighbour mask → ordinal → 8:8 relation → immediate fold) | Shipped (#1346) | `cognitive-shader-driver/examples/moore_plasticity_probe.rs` over `Register128` (4 × 4) with the existing `PalettePerturbation::hop`; 6 tests (mask = geometry, 84 visits; fold = pair-list oracle; synchronous; gate; one hop; replay), 4 disable runs red |
 | **D-GSO-3** | P3: global ontology agreement/disagreement probe (mammal fixture) | Shipped (#1350) | `cognitive-shader-driver/examples/ontology_agreement_probe.rs`: `NiblePath` hierarchy + `ontology_warrant::Quorum`/`SourceVerdict` folded per observation into local (self + siblings), up (ancestors), down (descendants); binary-entropy tension; all four cells + unknown reached; 6 tests, 5 disable runs red |
 | **D-GSO-4** | P4: entropy × topology routing probe | Shipped (#1351) | `cognitive-shader-driver/examples/entropy_topology_probe.rs` = F-ECG-1 and F-ECG-2 at probe level (F-ECG-3 open: no real corpus carries topology bits yet): bits 59..60 read through `BandDeclarations::project_truth` (topology lens, asserted provenance), known-share census as competence, `SettlementSignals::cell`, §4b walker route; equal measured entropy (0.8167 bits) → Crystal vs Glass; 6 tests, 4 disable runs red |
-| **D-GSO-5** | P5: first recipe quartet over existing primitives | In PR | `cognitive-shader-driver/examples/recipe_quartet_probe.rs`: four `match`-arm recipes over `Quorum::observe`, `Quad8::fold_product`, `Morton8x8` + `PalettePerturbation::hop`, `GadamerRevision::revise` (verdict left `NotRun`: removing the new roots is tautological, so the counterfactual moves to P7); a thread-local counting allocator shows zero allocations per recipe (no instruction vector); `ProbeRecipe` is its own type, not a shipped `recipes` ID; ordinal meanings not canonized; no Pearl projection (P7) and no selector (P6); 7 tests, 6 disable runs red |
-| **D-GSO-6** | P6: deterministic, versioned recipe selector | Queued | same replay identity ⇒ same recipe |
+| **D-GSO-5** | P5: first recipe quartet over existing primitives | Shipped (#1355) | `cognitive-shader-driver/examples/recipe_quartet_probe.rs`: four `match`-arm recipes over `Quorum::observe`, `Quad8::fold_product`, `Morton8x8` + `PalettePerturbation::hop`, `GadamerRevision::revise` (verdict left `NotRun`: removing the new roots is tautological, so the counterfactual moves to P7); a thread-local counting allocator shows zero allocations per recipe (no instruction vector); `ProbeRecipe` is its own type, not a shipped `recipes` ID; ordinal meanings not canonized; no Pearl projection (P7) and no selector (P6); 7 tests, 6 disable runs red |
+| **D-GSO-6** | P6: deterministic, versioned recipe selector | In PR | `cognitive-shader-driver/examples/recipe_selector_probe.rs`: `SelectorPolicy::select(state)` is a pure `const fn` over a declared 4-fact `EpistemicState`; V1 = §11 order (fold, bound, local, revise), rests only on the settled state; V2 swaps two steps (differs on 2 of 16 states); a recorded `Selection` (policy + state) replays under its own policy; every cycle rests in one step per open condition and replays identically; the version covers selection only, not recipe implementations (§13 digest open); 5 tests, 5 disable runs red |
 | **D-GSO-7** | P7: reasoning-band earning and downgrade | Queued | association cannot skip to causal permission; contradicting evidence lowers it; replayable |
 | **D-GSO-8** | P8: seal boundary | Queued | replay from the prior seal reproduces the next seal |
 

crates/cognitive-shader-driver/Cargo.toml

@@ -68,6 +68,11 @@ test = true
 name = "ewa_render_probe"
 test = true
 
+# D-GSO-6 recipe selector probe; tests run under `cargo test`.
+[[example]]
+name = "recipe_selector_probe"
+test = true
+
 [dependencies]
 lance-graph-contract = { path = "../lance-graph-contract" }
 # Read-only ontology registry (Phase 7, v4 plan). default-features = false so the

crates/cognitive-shader-driver/examples/README.md

@@ -144,3 +144,17 @@ cargo run -p cognitive-shader-driver --example ewa_render_probe
 
 `support/virtual_surfel.rs` holds the D-CTX-1 surfel reading that the rendering
 rounds read from, so they use exactly what D-CTX-1 tested.
+
+## recipe_selector_probe.rs
+
+D-GSO-6 (plan §18 P6). Recipe selection as a pure function of a declared
+policy version and a declared epistemic state (observations pending, frontier
+bounded, local disagreement, new encounter). V1 follows the §11 loop order
+(fold, bound, local, revise) and rests when nothing is open; V2 swaps two steps
+to show that a policy change is a new version. A recorded `Selection`
+(policy + state) replays to the same recipe from the record alone. The policy
+version covers selection only, not the recipes' implementations (plan §13).
+
+```bash
+cargo run -p cognitive-shader-driver --example recipe_selector_probe
+```