D2.1 token-agreement harness scaffold (I11 cert gate infra, 117/117 tests)

.claude/board/STATUS_BOARD.md

@@ -70,7 +70,7 @@ afterwards is a JIT kernel, not a rebuild. Plan path:
 
 | D-id | Title | Status | PR / Evidence |
 |---|---|---|---|
-| D2.1 | Reference-model loader (ndarray safetensors) | **Queued** | target ~180 LOC |
+| D2.1 | Token-agreement harness scaffold (reference model stub + top-k comparator + stub result) | **In PR** | branch — `ReferenceModel::{load, stub}` + `TokenAgreementError` + `TopKAgreement::{compare, top1_rate, top5_rate, meets_cert_gate, aggregate}` + `TokenAgreementHarness::{measure_stub, measure_full}` + 13 tests. Real safetensors load + decode loop defer to D2.2. |
 | D2.2 | Decode-and-compare loop (top-k, per-layer MSE) | **Queued** | target ~220 LOC |
 | D2.3 | Handler wiring for `/v1/shader/token-agreement` | **Queued** | target ~60 LOC |
 

crates/cognitive-shader-driver/src/lib.rs

@@ -138,6 +138,13 @@ pub mod rotation_kernel;
 #[cfg(feature = "serve")]
 pub mod decode_kernel;
 
+// D2.1 — token-agreement harness scaffold (I11 cert gate infra).
+// Reference model loader stub + top-k comparator + stub result with
+// machine-checkable `stub:true` flag. D2.2 adds real safetensors decode.
+// LAB-ONLY.
+#[cfg(feature = "serve")]
+pub mod token_agreement;
+
 // Axum REST server. LAB-ONLY.
 #[cfg(feature = "serve")]
 pub mod serve;