fix: resolve compilation errors across workspace

- Add PiQ3/PiQ2 match arms in ruvllm-cli quantize memory estimation
- Add main() stub to mincut-gated-transformer-wasm web_scorer example
- Gate scipix OCR examples behind required-features = ["ocr"]
- Fix usize/u64 type mismatch in ruvector-cnn kernel_equivalence test

https://claude.ai/code/session_01UWE22wnsZRSHKhT4h4Axby

Author: claude

crates/ruvector-cnn/tests/kernel_equivalence.rs

@@ -468,7 +468,7 @@ mod kernel_equivalence {
         };
 
         // Test matmul with various sizes (aligned and unaligned)
-        let sizes = vec![
+        let sizes: Vec<(usize, usize, usize)> = vec![
             (15, 15, 15), // Unaligned
             (16, 16, 16), // Aligned to 16
             (17, 17, 17), // Unaligned
@@ -478,7 +478,7 @@ mod kernel_equivalence {
         ];
 
         for (m, n, k) in sizes {
-            let mut rng = fastrand::Rng::with_seed(42 + m);
+            let mut rng = fastrand::Rng::with_seed(42 + m as u64);
             let a: Vec<i8> = (0..m * k).map(|_| rng.i8(..)).collect();
             let b: Vec<i8> = (0..k * n).map(|_| rng.i8(..)).collect();
 

crates/ruvector-mincut-gated-transformer-wasm/examples/web_scorer.rs

@@ -156,3 +156,9 @@ pub fn run_custom_config_example() -> Result<JsValue, JsValue> {
 
     Ok(output.into())
 }
+
+// Required for cargo test/check; this example is meant to be built with wasm-pack.
+#[cfg(not(target_arch = "wasm32"))]
+fn main() {
+    eprintln!("This example requires wasm-pack: wasm-pack build --target web");
+}

crates/ruvllm-cli/src/commands/quantize.rs

@@ -236,6 +236,20 @@ fn print_memory_estimates(format: TargetFormat) {
             e.total_mb *= 2.0;
             e
         },
+        TargetFormat::PiQ3 => |p, v, h, l| {
+            let mut e = estimate_memory_q4(p, v, h, l);
+            // PiQ3 is ~3.0625 bits/weight vs Q4's ~4.5, so ~68% of Q4 size
+            e.total_bytes = (e.total_bytes as f64 * 3.0625 / 4.5) as usize;
+            e.total_mb = e.total_bytes as f64 / (1024.0 * 1024.0);
+            e
+        },
+        TargetFormat::PiQ2 => |p, v, h, l| {
+            let mut e = estimate_memory_q4(p, v, h, l);
+            // PiQ2 is ~2.0625 bits/weight vs Q4's ~4.5, so ~46% of Q4 size
+            e.total_bytes = (e.total_bytes as f64 * 2.0625 / 4.5) as usize;
+            e.total_mb = e.total_bytes as f64 / (1024.0 * 1024.0);
+            e
+        },
     };
 
     // Qwen2.5-0.5B (RuvLTRA-Small)

examples/scipix/Cargo.toml

@@ -162,6 +162,7 @@ crate-type = ["cdylib", "rlib"]
 [[example]]
 name = "simple_ocr"
 path = "examples/simple_ocr.rs"
+required-features = ["ocr"]
 
 [[example]]
 name = "batch_processing"
@@ -171,6 +172,7 @@ required-features = ["ocr"]
 [[example]]
 name = "api_server"
 path = "examples/api_server.rs"
+required-features = ["ocr"]
 
 [[example]]
 name = "streaming"
@@ -180,14 +182,17 @@ required-features = ["ocr"]
 [[example]]
 name = "custom_pipeline"
 path = "examples/custom_pipeline.rs"
+required-features = ["ocr"]
 
 [[example]]
 name = "lean_agentic"
 path = "examples/lean_agentic.rs"
+required-features = ["ocr"]
 
 [[example]]
 name = "accuracy_test"
 path = "examples/accuracy_test.rs"
+required-features = ["ocr"]
 
 # Benchmark configurations
 [[bench]]