ci: add parse/runtime conformance jobs and prelude execution smoke test

Author: darmie

.github/workflows/ci.yml

@@ -30,3 +30,40 @@ jobs:
 
       - name: Run clippy
         run: cargo clippy --workspace --all-targets
+
+  parse-conformance:
+    name: parse conformance
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Cache cargo artifacts
+        uses: Swatinem/rust-cache@v2
+
+      - name: Run docs snippet parse conformance
+        run: RUST_MIN_STACK=134217728 cargo test -p zynml --test e2e_tests docs_conformance:: -- --nocapture
+
+      - name: Run examples parse regression suite
+        run: RUST_MIN_STACK=134217728 cargo test -p zynml --test e2e_tests examples_regression:: -- --nocapture
+
+  runtime-smoke:
+    name: runtime smoke
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Cache cargo artifacts
+        uses: Swatinem/rust-cache@v2
+
+      - name: Run runtime smoke tests
+        run: |
+          RUST_MIN_STACK=134217728 cargo test -p zynml --test e2e_tests execution::test_execute_simple_expression -- --nocapture
+          RUST_MIN_STACK=134217728 cargo test -p zynml --test e2e_tests execution::test_execute_prelude_only_example -- --nocapture

crates/zynml/tests/e2e_tests.rs

@@ -3566,6 +3566,30 @@ mod execution {
         }
     }
 
+    #[test]
+    fn test_execute_prelude_only_example() {
+        let Some(mut zynml) = create_runtime_with_plugins() else {
+            println!("Skipping: plugins not available");
+            return;
+        };
+
+        let example_path = examples_dir().join("test_prelude_only.zynml");
+        if !example_path.exists() {
+            println!("Skipping: test_prelude_only.zynml not found");
+            return;
+        }
+
+        let result = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| {
+            zynml.run_file(&example_path)
+        }));
+
+        match result {
+            Ok(Ok(())) => {}
+            Ok(Err(e)) => panic!("test_prelude_only.zynml should execute successfully: {}", e),
+            Err(_) => panic!("test_prelude_only.zynml caused a runtime panic"),
+        }
+    }
+
     // Ignored: this test crashes the test process with SIGABRT (stack overflow in Grammar2
     // interpreter parsing the complex prelude.zynml) or SIGSEGV (tensor runtime bug in
     // println_any). Both are pre-existing issues that kill the test runner via signal.