diff --git a/.changepacks/changepack_log_gpQF3tSrOG8PO5FF9lBxf.json b/.changepacks/changepack_log_gpQF3tSrOG8PO5FF9lBxf.json
new file mode 100644
index 0000000..4c0ab71
--- /dev/null
+++ b/.changepacks/changepack_log_gpQF3tSrOG8PO5FF9lBxf.json
@@ -0,0 +1 @@
+{"changes":{"Cargo.toml":"Patch"},"note":"Fix json column type","date":"2026-04-21T05:05:38.721991Z"}
\ No newline at end of file
diff --git a/Cargo.lock b/Cargo.lock
index a21e11f..b00af2e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3712,7 +3712,7 @@ checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
 
 [[package]]
 name = "vespera"
-version = "0.1.48"
+version = "0.1.50"
 dependencies = [
  "axum",
  "axum-extra",
@@ -3731,7 +3731,7 @@ dependencies = [
 
 [[package]]
 name = "vespera_core"
-version = "0.1.48"
+version = "0.1.50"
 dependencies = [
  "rstest",
  "serde",
@@ -3740,7 +3740,7 @@ dependencies = [
 
 [[package]]
 name = "vespera_inprocess"
-version = "0.1.48"
+version = "0.1.50"
 dependencies = [
  "axum",
  "http",
@@ -3753,7 +3753,7 @@ dependencies = [
 
 [[package]]
 name = "vespera_jni"
-version = "0.1.48"
+version = "0.1.50"
 dependencies = [
  "jni",
  "tokio",
@@ -3762,7 +3762,7 @@ dependencies = [
 
 [[package]]
 name = "vespera_macro"
-version = "0.1.48"
+version = "0.1.50"
 dependencies = [
  "insta",
  "proc-macro2",
diff --git a/crates/vespera_jni/src/lib.rs b/crates/vespera_jni/src/lib.rs
index 172cbe4..ae7b024 100644
--- a/crates/vespera_jni/src/lib.rs
+++ b/crates/vespera_jni/src/lib.rs
@@ -64,8 +64,7 @@ mod jni_impl {
         unowned_env
             .with_env(|env| -> jni::errors::Result<JObject<'local>> {
                 let Ok(input) = request_json.try_to_string(env) else {
-                    let err =
-                        vespera_inprocess::serialize_error("invalid request envelope string");
+                    let err = vespera_inprocess::serialize_error("invalid request envelope string");
                     return Ok(env.new_string(err)?.into());
                 };
 
diff --git a/crates/vespera_macro/src/collector.rs b/crates/vespera_macro/src/collector.rs
index 650bc7d..28e5534 100644
--- a/crates/vespera_macro/src/collector.rs
+++ b/crates/vespera_macro/src/collector.rs
@@ -173,12 +173,11 @@ pub fn collect_file_fingerprints(folder_path: &Path) -> MacroResult<HashMap<Stri
         }
         let mtime = std::fs::metadata(&file)
             .and_then(|m| m.modified())
-            .map(|t| {
+            .map_or(0, |t| {
                 t.duration_since(std::time::UNIX_EPOCH)
                     .unwrap_or_default()
                     .as_secs()
-            })
-            .unwrap_or(0);
+            });
         fingerprints.insert(file.display().to_string(), mtime);
     }
     Ok(fingerprints)
diff --git a/crates/vespera_macro/src/parser/schema/struct_schema.rs b/crates/vespera_macro/src/parser/schema/struct_schema.rs
index bb34eab..7622cd3 100644
--- a/crates/vespera_macro/src/parser/schema/struct_schema.rs
+++ b/crates/vespera_macro/src/parser/schema/struct_schema.rs
@@ -364,10 +364,7 @@ mod tests {
         )
         .unwrap();
         let schema = parse_struct_to_schema(&struct_item, &HashSet::new(), &HashMap::new());
-        assert_eq!(
-            schema.description,
-            Some("Struct description".to_string())
-        );
+        assert_eq!(schema.description, Some("Struct description".to_string()));
         let props = schema.properties.unwrap();
         if let SchemaRef::Inline(id_schema) = props.get("id").unwrap() {
             assert_eq!(id_schema.description, Some("Field description".to_string()));
diff --git a/crates/vespera_macro/src/schema_macro/seaorm.rs b/crates/vespera_macro/src/schema_macro/seaorm.rs
index ab553df..97ba9f5 100644
--- a/crates/vespera_macro/src/schema_macro/seaorm.rs
+++ b/crates/vespera_macro/src/schema_macro/seaorm.rs
@@ -710,6 +710,21 @@ mod tests {
         assert_eq!(output.trim(), "vespera :: tempfile :: NamedTempFile");
     }
 
+    #[test]
+    fn test_convert_type_with_chrono_json_alias_uses_public_value_path() {
+        let ty: syn::Type = syn::parse_str("Json").unwrap();
+        let tokens = convert_type_with_chrono(
+            &ty,
+            &[
+                "crate".to_string(),
+                "models".to_string(),
+                "json_case".to_string(),
+            ],
+        );
+        let output = tokens.to_string();
+        assert_eq!(output.trim(), "vespera :: serde_json :: Value");
+    }
+
     // =========================================================================
     // Tests for convert_relation_type_to_schema_with_info
     // =========================================================================
diff --git a/crates/vespera_macro/src/schema_macro/tests.rs b/crates/vespera_macro/src/schema_macro/tests.rs
index ed702b9..4e94bac 100644
--- a/crates/vespera_macro/src/schema_macro/tests.rs
+++ b/crates/vespera_macro/src/schema_macro/tests.rs
@@ -2029,3 +2029,59 @@ pub struct Model {
     let output = tokens.to_string();
     assert!(output.contains("UserSchema"));
 }
+
+#[test]
+#[serial]
+fn test_generate_schema_type_code_cross_module_json_alias_uses_public_path() {
+    use tempfile::TempDir;
+
+    let temp_dir = TempDir::new().unwrap();
+    let src_dir = temp_dir.path().join("src");
+    let models_dir = src_dir.join("models");
+    let routes_dir = src_dir.join("routes");
+    std::fs::create_dir_all(&models_dir).unwrap();
+    std::fs::create_dir_all(&routes_dir).unwrap();
+
+    let json_case_model = r#"
+use sea_orm::entity::prelude::*;
+
+#[sea_orm::model]
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "json_case")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: i32,
+    pub payload: Json,
+}
+
+impl ActiveModelBehavior for ActiveModel {}
+"#;
+    std::fs::write(models_dir.join("json_case.rs"), json_case_model).unwrap();
+    std::fs::write(
+        routes_dir.join("json_case.rs"),
+        "vespera::schema_type!(RouteJsonCaseSchema from crate::models::json_case::Model);",
+    )
+    .unwrap();
+
+    let original_manifest_dir = std::env::var("CARGO_MANIFEST_DIR").ok();
+    unsafe { std::env::set_var("CARGO_MANIFEST_DIR", temp_dir.path()) };
+
+    let tokens = quote!(RouteJsonCaseSchema from crate::models::json_case::Model);
+    let input: SchemaTypeInput = syn::parse2(tokens).unwrap();
+    let storage: HashMap<String, StructMetadata> = HashMap::new();
+    let result = generate_schema_type_code(&input, &storage);
+
+    unsafe {
+        if let Some(dir) = original_manifest_dir {
+            std::env::set_var("CARGO_MANIFEST_DIR", dir);
+        } else {
+            std::env::remove_var("CARGO_MANIFEST_DIR");
+        }
+    }
+
+    assert!(result.is_ok());
+    let (tokens, _metadata) = result.unwrap();
+    let output = tokens.to_string();
+    assert!(output.contains("pub payload : vespera :: serde_json :: Value"));
+    assert!(!output.contains("crate :: models :: json_case :: Json"));
+}
diff --git a/crates/vespera_macro/src/schema_macro/type_utils.rs b/crates/vespera_macro/src/schema_macro/type_utils.rs
index 08937ab..903bee6 100644
--- a/crates/vespera_macro/src/schema_macro/type_utils.rs
+++ b/crates/vespera_macro/src/schema_macro/type_utils.rs
@@ -5,7 +5,7 @@
 use proc_macro2::TokenStream;
 use quote::quote;
 use serde_json;
-use syn::Type;
+use syn::{GenericArgument, PathArguments, Type};
 
 /// Primitive type names shared across the crate.
 /// Used by both `is_primitive_type()` (parser) and `is_parseable_type()` (schema_macro).
@@ -154,6 +154,81 @@ pub fn is_primitive_or_known_type(name: &str) -> bool {
     )
 }
 
+fn resolve_public_type_path(name: &str) -> Option<TokenStream> {
+    match name {
+        // SeaORM re-exports `serde_json::Value` as `Json`; emit a stable public path.
+        "Json" | "Value" => Some(quote! { vespera::serde_json::Value }),
+        _ => None,
+    }
+}
+
+fn normalize_known_type_in_generic(ty: &Type, source_module_path: &[String]) -> TokenStream {
+    let Type::Path(type_path) = ty else {
+        return quote! { #ty };
+    };
+
+    let Some(segment) = type_path.path.segments.last() else {
+        return quote! { #ty };
+    };
+
+    let ident_str = segment.ident.to_string();
+
+    if let Some(public_path) = resolve_public_type_path(&ident_str) {
+        return quote! { #public_path };
+    }
+
+    if type_path.path.segments.len() > 1 {
+        let rendered_segments: Vec<_> = type_path
+            .path
+            .segments
+            .iter()
+            .map(|segment| {
+                let ident = &segment.ident;
+                let args = render_path_arguments(&segment.arguments, source_module_path);
+                quote! { #ident #args }
+            })
+            .collect();
+
+        if type_path.path.leading_colon.is_some() {
+            return quote! { :: #(#rendered_segments)::* };
+        }
+
+        return quote! { #(#rendered_segments)::* };
+    }
+
+    if is_primitive_or_known_type(&ident_str) {
+        let ident = &segment.ident;
+        let args = render_path_arguments(&segment.arguments, source_module_path);
+        return quote! { #ident #args };
+    }
+
+    quote! { #ty }
+}
+
+fn render_path_arguments(args: &PathArguments, source_module_path: &[String]) -> TokenStream {
+    match args {
+        PathArguments::None => quote! {},
+        PathArguments::AngleBracketed(angle_args) => {
+            let rendered_args: Vec<_> = angle_args
+                .args
+                .iter()
+                .map(|arg| {
+                    if let GenericArgument::Type(inner_ty) = arg {
+                        let resolved =
+                            normalize_known_type_in_generic(inner_ty, source_module_path);
+                        quote! { #resolved }
+                    } else {
+                        quote! { #arg }
+                    }
+                })
+                .collect();
+
+            quote! { <#(#rendered_args),*> }
+        }
+        PathArguments::Parenthesized(_) => quote! { #args },
+    }
+}
+
 /// Resolve a simple type to an absolute path using the source module path.
 ///
 /// For example, if `source_module_path` is `["crate", "models", "memo"]` and
@@ -166,9 +241,28 @@ pub fn resolve_type_to_absolute_path(ty: &Type, source_module_path: &[String]) -
         return quote! { #ty };
     };
 
+    if type_path.path.segments.is_empty() {
+        return quote! { #ty };
+    }
+
     // If path has multiple segments (already qualified like `crate::foo::Bar`), return as-is
     if type_path.path.segments.len() > 1 {
-        return quote! { #ty };
+        let rendered_segments: Vec<_> = type_path
+            .path
+            .segments
+            .iter()
+            .map(|segment| {
+                let ident = &segment.ident;
+                let args = render_path_arguments(&segment.arguments, source_module_path);
+                quote! { #ident #args }
+            })
+            .collect();
+
+        if type_path.path.leading_colon.is_some() {
+            return quote! { :: #(#rendered_segments)::* };
+        }
+
+        return quote! { #(#rendered_segments)::* };
     }
 
     // Get the single segment
@@ -177,15 +271,22 @@ pub fn resolve_type_to_absolute_path(ty: &Type, source_module_path: &[String]) -
     };
 
     let ident_str = segment.ident.to_string();
+    let args = render_path_arguments(&segment.arguments, source_module_path);
+
+    if let Some(public_path) = resolve_public_type_path(&ident_str) {
+        return quote! { #public_path };
+    }
 
     // If it's a primitive or known type, return as-is
     if is_primitive_or_known_type(&ident_str) {
-        return quote! { #ty };
+        let type_ident = &segment.ident;
+        return quote! { #type_ident #args };
     }
 
     // If no source module path, return as-is
     if source_module_path.is_empty() {
-        return quote! { #ty };
+        let type_ident = &segment.ident;
+        return quote! { #type_ident #args };
     }
 
     // Build absolute path: source_module_path + type_name
@@ -194,7 +295,6 @@ pub fn resolve_type_to_absolute_path(ty: &Type, source_module_path: &[String]) -
         .map(|s| syn::Ident::new(s, proc_macro2::Span::call_site()))
         .collect();
     let type_ident = &segment.ident;
-    let args = &segment.arguments;
 
     quote! { #(#path_idents)::* :: #type_ident #args }
 }
@@ -559,6 +659,33 @@ mod tests {
         assert_eq!(output.trim(), "Decimal");
     }
 
+    #[test]
+    fn test_resolve_type_to_absolute_path_json_alias_uses_public_path() {
+        let ty: syn::Type = syn::parse_str("Json").unwrap();
+        let module_path = vec![
+            "crate".to_string(),
+            "models".to_string(),
+            "json_case".to_string(),
+        ];
+        let tokens = resolve_type_to_absolute_path(&ty, &module_path);
+        let output = tokens.to_string();
+        assert_eq!(output.trim(), "vespera :: serde_json :: Value");
+    }
+
+    #[test]
+    fn test_resolve_type_to_absolute_path_known_container_normalizes_inner_json_alias() {
+        let ty: syn::Type = syn::parse_str("HashMap<String, Json>").unwrap();
+        let module_path = vec![
+            "crate".to_string(),
+            "models".to_string(),
+            "json_case".to_string(),
+        ];
+        let tokens = resolve_type_to_absolute_path(&ty, &module_path);
+        let output = tokens.to_string();
+        assert!(output.contains("HashMap < String , vespera :: serde_json :: Value >"));
+        assert!(!output.contains("crate :: models :: json_case :: Json"));
+    }
+
     #[test]
     fn test_resolve_type_to_absolute_path_custom_type() {
         let ty: syn::Type = syn::parse_str("MemoStatus").unwrap();
diff --git a/crates/vespera_macro/src/vespera_impl.rs b/crates/vespera_macro/src/vespera_impl.rs
index 6933ed3..86a19a3 100644
--- a/crates/vespera_macro/src/vespera_impl.rs
+++ b/crates/vespera_macro/src/vespera_impl.rs
@@ -181,9 +181,8 @@ pub fn generate_and_write_openapi(
             if let Some(parent) = file_path.parent() {
                 std::fs::create_dir_all(parent).map_err(|e| err_call_site(format!("OpenAPI output: failed to create directory '{}'. Error: {}. Ensure the path is valid and writable.", parent.display(), e)))?;
             }
-            let should_write = std::fs::read_to_string(file_path)
-                .map(|existing| existing != json_pretty)
-                .unwrap_or(true);
+            let should_write =
+                std::fs::read_to_string(file_path).map_or(true, |existing| existing != json_pretty);
             if should_write {
                 std::fs::write(file_path, &json_pretty).map_err(|e| err_call_site(format!("OpenAPI output: failed to write file '{openapi_file_name}'. Error: {e}. Ensure the file path is writable.")))?;
             }
@@ -302,9 +301,8 @@ pub fn ensure_openapi_files_from_cache(
     };
     for openapi_file_name in openapi_file_names {
         let file_path = Path::new(openapi_file_name);
-        let should_write = std::fs::read_to_string(file_path)
-            .map(|existing| existing != *pretty)
-            .unwrap_or(true);
+        let should_write =
+            std::fs::read_to_string(file_path).map_or(true, |existing| existing != *pretty);
         if should_write {
             if let Some(parent) = file_path.parent() {
                 std::fs::create_dir_all(parent).map_err(|e| {
@@ -351,9 +349,8 @@ fn write_spec_for_embedding(
         )
     })?;
     let spec_file = vespera_dir.join("vespera_spec.json");
-    let should_write = std::fs::read_to_string(&spec_file)
-        .map(|existing| existing != json)
-        .unwrap_or(true);
+    let should_write =
+        std::fs::read_to_string(&spec_file).map_or(true, |existing| existing != json);
     if should_write {
         std::fs::write(&spec_file, &json).map_err(|e| {
             syn::Error::new(