MTP tools & Centralizing

src/mutations.rs

@@ -0,0 +1,10 @@
+use serde::{Deserialize, Serialize};
+
+/// A single file change inferred from a sandbox diff: `hash_before` absent means the file
+/// was created, `hash_after` absent means it was deleted, both present means it was modified.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct FileMutation {
+    pub file: String,
+    pub hash_before: Option<String>,
+    pub hash_after: Option<String>,
+}