feat: publish Dever core with project scaffolding and versioned AI skills

crates/dever-backend-bridge/build.rs

@@ -0,0 +1,50 @@
+fn main() {
+    #[cfg(feature = "embedded")]
+    build();
+}
+
+#[cfg(feature = "embedded")]
+fn build() {
+    use std::path::PathBuf;
+
+    // Private authoring SDK, never a runtime PATH lookup or app setting.
+    // Release builders prepare these headers/libraries before enabling embedded.
+    let root =
+        PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("../../target/backend-sdk/usr/lib/llvm-18");
+    let include = root.join("include");
+    let lib = root.join("lib");
+    for input in [include.join("lld/Common/Driver.h"), lib.join("liblldELF.a")] {
+        assert!(
+            input.is_file(),
+            "private LLVM 18 SDK is missing: {}",
+            input.display()
+        );
+    }
+    println!("cargo:rerun-if-changed=src/bridge.cpp");
+    println!("cargo:rerun-if-changed={}", root.display());
+    cc::Build::new()
+        .cpp(true)
+        .std("c++17")
+        // Upstream headers are system headers; warnings remain enabled for ours.
+        .flag("-isystem")
+        .flag(include.to_str().expect("SDK include path must be UTF-8"))
+        .file("src/bridge.cpp")
+        .flag_if_supported("-fno-rtti")
+        .compile("dever_backend_bridge");
+    println!("cargo:rustc-link-search=native={}", lib.display());
+    let multiarch = match std::env::var("TARGET").as_deref() {
+        Ok("x86_64-unknown-linux-gnu") => "x86_64-linux-gnu",
+        Ok("aarch64-unknown-linux-gnu") => "aarch64-linux-gnu",
+        _ => panic!("the embedded author SDK currently requires a Linux GNU target"),
+    };
+    println!(
+        "cargo:rustc-link-search=native={}",
+        root.join("..").join(multiarch).display()
+    );
+    for name in ["lldELF", "lldCOFF", "lldMachO", "lldCommon"] {
+        println!("cargo:rustc-link-lib=static={name}");
+    }
+    println!("cargo:rustc-link-lib=dylib=LLVM-18");
+    println!("cargo:rustc-link-lib=dylib=z");
+    println!("cargo:rustc-link-lib=static=zstd");
+}