D3.1 batch sweep handler + clippy -D warnings clean (117/117 tests)

Phase 3 batch endpoint + 11 clippy fixes across the crate.

D3.1 — POST /v1/shader/sweep (batch mode):
  Enumerates WireSweepGrid::enumerate(), validates each CodecParams
  at ingress (precision-ladder + overfit guard per point), computes
  kernel_signature() for each candidate, returns WireSweepResponse
  with all WireSweepResult rows (stub: calibrate=None,
  token_agreement=None, stub=true). SSE streaming + real per-point
  calibrate/token-agreement defer to D3.1b.

  Route wired in serve.rs alongside existing calibrate/probe/
  token-agreement routes. Handler is ~50 LOC.

Clippy fixes (11 issues, now -D warnings clean):
  - auto_style.rs: removed unused import QUALIA_DIMS (moved to test
    module where it's actually needed)
  - codec_bridge.rs: 3x redundant closure → tuple variant directly
  - driver.rs: 3x OR patterns → range patterns (1|2|3 → 1..=3)
  - wire.rs: is_aligned_64 manual impl → .is_multiple_of(64)
  - wire.rs: derivable Default for WireBaseline → #[derive(Default)]
  - decode_kernel.rs: doc list item overindentation → 2-space
  - codec_research.rs: #[allow(clippy::type_complexity)] on existing
    complex fn return type (not worth refactoring pre-existing code)

Board hygiene:
  STATUS_BOARD.md D3.1 Queued → In PR

Phase state after merge:
  Phase 0  ✅ complete
  Phase 1 scaffold ✅ (D1.1/D1.2/D1.3)
  Phase 2 scaffold ✅ (D2.1/D2.3)
  Phase 3 batch ✅ D3.1 (this PR)
  Remaining: D1.1b Cranelift, D2.2 real decode, D3.1b SSE, Phase 4-5

https://claude.ai/code/session_01SbYsmmbPf9YQuYbHZN52Zh

Author: claude

.claude/board/STATUS_BOARD.md

@@ -78,7 +78,7 @@ afterwards is a JIT kernel, not a rebuild. Plan path:
 
 | D-id | Title | Status | PR / Evidence |
 |---|---|---|---|
-| D3.1 | Server-side sweep handler + Lance fragment append | **Queued** | target ~200 LOC |
+| D3.1 | Server-side sweep handler + Lance fragment append | **In PR** | branch — `sweep_handler` batch mode: enumerates `WireSweepGrid::enumerate()`, validates each via TryFrom(CodecParams) at ingress, returns `WireSweepResponse { results: [WireSweepResult { kernel_hash, stub:true }], cardinality, elapsed_ms }`. SSE streaming + real calibrate/token-agreement per point deferred to D3.1b. Route: `POST /v1/shader/sweep`. |
 | D3.2 | Client-side driver + config files | **Queued** | target ~20 LOC + YAML configs |
 
 ### Phase 4 — Frontier analysis — Queued

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

@@ -17,7 +17,7 @@
 //! If nothing dominates (`max < threshold`), fall back to Deliberate.
 
 use lance_graph_contract::cognitive_shader::StyleSelector;
-use crate::bindspace::QUALIA_DIMS;
+
 
 /// Mapping from qualia shape to a style ordinal (0..11 matches
 /// `thinking_engine::cognitive_stack::ThinkingStyle::all()`).
@@ -104,6 +104,7 @@ pub fn resolve(sel: StyleSelector, qualia_row: &[f32]) -> u8 {
 #[cfg(test)]
 mod tests {
     use super::*;
+    use crate::bindspace::QUALIA_DIMS;
 
     fn q(vals: &[(usize, f32)]) -> [f32; QUALIA_DIMS] {
         let mut out = [0.0f32; QUALIA_DIMS];

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

@@ -46,7 +46,7 @@ impl OrchestrationBridge for CodecResearchBridge {
                 let req: WireTensorsRequest = serde_json::from_str(args)
                     .map_err(|e| OrchestrationError::ExecutionFailed(e.to_string()))?;
                 let r = codec_research::list_tensors(&req)
-                    .map_err(|e| OrchestrationError::ExecutionFailed(e))?;
+                    .map_err(OrchestrationError::ExecutionFailed)?;
                 step.status = StepStatus::Completed;
                 step.reasoning = Some(format!(
                     "tensors total={} cam_pq={} passthrough={} skip={}",
@@ -58,7 +58,7 @@ impl OrchestrationBridge for CodecResearchBridge {
                 let req: WireCalibrateRequest = serde_json::from_str(args)
                     .map_err(|e| OrchestrationError::ExecutionFailed(e.to_string()))?;
                 let r = codec_research::calibrate_tensor(&req)
-                    .map_err(|e| OrchestrationError::ExecutionFailed(e))?;
+                    .map_err(OrchestrationError::ExecutionFailed)?;
                 step.status = StepStatus::Completed;
                 step.confidence = Some(r.icc_3_1 as f64);
                 step.reasoning = Some(format!(
@@ -71,7 +71,7 @@ impl OrchestrationBridge for CodecResearchBridge {
                 let req: WireProbeRequest = serde_json::from_str(args)
                     .map_err(|e| OrchestrationError::ExecutionFailed(e.to_string()))?;
                 let r = codec_research::row_count_probe(&req)
-                    .map_err(|e| OrchestrationError::ExecutionFailed(e))?;
+                    .map_err(OrchestrationError::ExecutionFailed)?;
                 step.status = StepStatus::Completed;
                 step.reasoning = Some(format!(
                     "probe tensor={} n_rows={} entries={}",

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

@@ -175,6 +175,7 @@ fn route_str(r: CodecRoute) -> &'static str {
     }
 }
 
+#[allow(clippy::type_complexity)]
 fn load_tensor_rows(
     model_path: &str,
     tensor_pattern: &str,

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

@@ -16,8 +16,8 @@
 //!   round-trip, no quantization loss, matches Rule F "serialise once at
 //!   edge" — the decode/encode IS the edge).
 //! - [`ResidualComposer`] — composes two decoders with subtract/add:
-//!     `decode(enc) = base.decode(enc[..k]) + residual.decode(enc[k..])`
-//!   `encode(v)    = [base.encode(v); residual.encode(v - base.decode(base.encode(v)))]`
+//!   `decode(enc) = base.decode(enc[..k]) + residual.decode(enc[k..])`
+//!   `encode(v) = [base.encode(v); residual.encode(v - base.decode(base.encode(v)))]`
 //!   Depth `d > 1` recurses: the residual field itself is a `ResidualComposer`.
 
 use std::collections::hash_map::DefaultHasher;

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

@@ -333,9 +333,9 @@ fn style_ord_to_inference(ord: u8) -> InferenceType {
     // intuitive/deliberate             → Revision
     // metacognitive                    → Synthesis
     match ord {
-        1 | 2 | 3 => InferenceType::Deduction,
-        4 | 5 | 6 => InferenceType::Induction,
-        7 | 8 | 9 => InferenceType::Abduction,
+        1..=3 => InferenceType::Deduction,
+        4..=6 => InferenceType::Induction,
+        7..=9 => InferenceType::Abduction,
         0 | 10    => InferenceType::Revision,
         _         => InferenceType::Synthesis,
     }

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

@@ -50,8 +50,9 @@ use crate::wire::{
     WireCalibrateRequest, WireCalibrateResponse, WireCrystal, WireDispatch, WireHealth,
     WireIngest, WirePlanRequest, WirePlanResponse, WireProbeRequest, WireProbeResponse,
     WireQualia, WireRunbookRequest, WireRunbookResponse, WireRunbookStep,
-    WireRunbookStepResult, WireStepResult, WireStyleInfo, WireTensorsRequest,
-    WireTensorsResponse, WireTokenAgreement, WireTokenAgreementResult, WireUnifiedStep,
+    WireRunbookStepResult, WireStepResult, WireStyleInfo, WireSweepRequest,
+    WireSweepResponse, WireSweepResult, WireTensorsRequest, WireTensorsResponse,
+    WireTokenAgreement, WireTokenAgreementResult, WireUnifiedStep,
 };
 use lance_graph_contract::cam::CodecParams;
 use std::path::Path as StdPath;
@@ -96,6 +97,13 @@ pub fn router(driver: ShaderDriver) -> Router {
         // `backend:"stub"` so clients cannot confuse Phase 0 stub output
         // for a real measurement (anti-#219 defense, type-level).
         .route("/v1/shader/token-agreement", post(token_agreement_handler))
+        // D3.1 — codec sweep endpoint (batch mode). Client POSTs a
+        // WireSweepRequest containing a cross-product grid; handler
+        // enumerates grid, validates each candidate, builds stub results,
+        // returns WireSweepResponse. SSE streaming + Lance append land in
+        // D3.1b; this batch path stays for clients that want all results
+        // in one response without streaming.
+        .route("/v1/shader/sweep", post(sweep_handler))
         // Scheduled runbook: one POST runs a list of steps. Test injection
         // lands here — a client script submits its full codec-research
         // protocol as a single DTO, the server executes and returns all
@@ -284,6 +292,54 @@ async fn token_agreement_handler(
         .map_err(|e| (StatusCode::BAD_REQUEST, Json(json!({"error": format!("{e}")}))))
 }
 
+/// D3.1 — `POST /v1/shader/sweep` handler (batch mode).
+///
+/// Enumerates the cross-product grid from `WireSweepRequest`, validates
+/// each candidate via TryFrom(CodecParams), computes kernel_signature +
+/// backend per point, and returns all results in one `WireSweepResponse`.
+///
+/// Stub: per-point calibrate/token_agreement are `None`; Phase 3 real
+/// handler invokes the actual codec_research + token_agreement harness.
+/// SSE streaming variant (D3.1b) replaces the batch return with per-point
+/// Server-Sent Events.
+async fn sweep_handler(
+    Json(req): Json<WireSweepRequest>,
+) -> Result<Json<WireSweepResponse>, (StatusCode, Json<Value>)> {
+    let start = std::time::Instant::now();
+    let candidates = req.grid.enumerate();
+    let cardinality = candidates.len() as u32;
+
+    let mut results = Vec::with_capacity(candidates.len());
+    for (idx, wire_params) in candidates.into_iter().enumerate() {
+        // Validate each grid point at ingress — surface typed errors early.
+        let params: CodecParams = wire_params
+            .clone()
+            .try_into()
+            .map_err(|e: lance_graph_contract::cam::CodecParamsError| {
+                (StatusCode::BAD_REQUEST, Json(json!({
+                    "error": format!("grid point {idx}: invalid CodecParams: {e}")
+                })))
+            })?;
+
+        results.push(WireSweepResult {
+            grid_index: idx as u32,
+            candidate: wire_params,
+            kernel_hash: params.kernel_signature(),
+            calibrate: None,
+            token_agreement: None,
+            stub: true,
+        });
+    }
+
+    Ok(Json(WireSweepResponse {
+        label: req.label,
+        cardinality,
+        results,
+        elapsed_ms: start.elapsed().as_millis() as u64,
+        lance_fragment_path: req.log_to_lance,
+    }))
+}
+
 async fn route_handler(
     State(_state): State<AppState>,
     Json(wire): Json<WireUnifiedStep>,

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

@@ -405,7 +405,7 @@ impl AlignedBytes {
     }
 
     pub fn is_aligned_64(&self) -> bool {
-        (self.ptr as usize) % 64 == 0
+        (self.ptr as usize).is_multiple_of(64)
     }
 
     pub fn len(&self) -> usize { self.len }
@@ -933,17 +933,15 @@ fn named_to_ordinal(s: &str) -> u8 {
 /// Reference baseline for token-agreement comparison. Extensible enum —
 /// `Passthrough` is the only variant today; future baselines (half-precision
 /// reference, previous codec generation) plug in as variants.
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Default, Serialize, Deserialize)]
 #[serde(tag = "kind", rename_all = "snake_case")]
 pub enum WireBaseline {
     /// Passthrough = untouched weights, F32 decode. The canonical
     /// reference every codec candidate is measured against.
+    #[default]
     Passthrough,
 }
 
-impl Default for WireBaseline {
-    fn default() -> Self { Self::Passthrough }
-}
 
 /// `POST /v1/shader/token-agreement` request.
 ///