Add Graph IR canonicalization and spawn rule loader

crates/treeagent-model/Cargo.toml

@@ -4,6 +4,16 @@ authors.workspace = true
 edition.workspace = true
 license.workspace = true
 version.workspace = true
+build = "build.rs"
 
 [dependencies]
 anyhow.workspace = true
+blake3 = "1.5"
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+
+[dev-dependencies]
+tempfile = "3.10"
+
+[build-dependencies]
+anyhow.workspace = true

crates/treeagent-model/build.rs

@@ -0,0 +1,20 @@
+use std::collections::BTreeSet;
+use std::env;
+
+fn main() -> anyhow::Result<()> {
+    let target = env::var("TARGET").unwrap_or_else(|_| "unknown-target".to_string());
+    println!("cargo:rustc-env=TREEAGENT_BUILD_TARGET={target}");
+
+    let profile = env::var("PROFILE").unwrap_or_else(|_| "unknown-profile".to_string());
+    println!("cargo:rustc-env=TREEAGENT_BUILD_PROFILE={profile}");
+
+    let mut features = BTreeSet::new();
+    for (key, _) in env::vars() {
+        if let Some(feature) = key.strip_prefix("CARGO_FEATURE_") {
+            features.insert(feature.to_ascii_lowercase().replace('_', "-"));
+        }
+    }
+    let feature_list = features.into_iter().collect::<Vec<_>>().join(",");
+    println!("cargo:rustc-env=TREEAGENT_BUILD_FEATURES={feature_list}");
+    Ok(())
+}