diff --git a/server/src/handlers/ast.rs b/server/src/handlers/ast.rs
index e5364e0..9b8626f 100644
--- a/server/src/handlers/ast.rs
+++ b/server/src/handlers/ast.rs
@@ -204,167 +204,172 @@ impl McpTool for ReplaceAstNodeHandler {
         let tool_args: ReplaceAstNodeTool =
             serde_json::from_value(args).map_err(|e| crate::error::AppError::BadRequest(format!("Schema validation failed. Your JSON arguments do not match the expected tool schema: {}", e)))?;
 
-        let file_path = tool_args.file_path.clone();
-        validate_safe_path(&file_path)?;
+        let replacements = tool_args.replacements;
+        if replacements.is_empty() {
+            return Ok("No replacements provided.".to_string());
+        }
 
         let result = tokio::task::spawn_blocking(move || -> crate::error::Result<String> {
-            let code = std::fs::read_to_string(&file_path).map_err(|e| {
-                crate::error::AppError::Internal(format!("Failed to read file: {}", e))
-            })?;
+            let mut msgs = Vec::new();
+            for rep in replacements {
+                let file_path = rep.file_path.clone();
+                validate_safe_path(&file_path)?;
 
-            let mut parser = Parser::new();
+                let code = std::fs::read_to_string(&file_path).map_err(|e| {
+                    crate::error::AppError::Internal(format!("Failed to read file: {}", e))
+                })?;
 
-            let ext = std::path::Path::new(&file_path)
-                .extension()
-                .and_then(|s| s.to_str())
-                .unwrap_or("");
+                let mut parser = Parser::new();
 
-            let language = match ext {
-                "rs" => tree_sitter_rust::LANGUAGE,
-                "ts" | "tsx" | "js" | "jsx" => tree_sitter_typescript::LANGUAGE_TYPESCRIPT,
-                "py" => tree_sitter_python::LANGUAGE,
-                "java" => tree_sitter_java::LANGUAGE,
-                "c" | "h" => tree_sitter_c::LANGUAGE,
-                "cpp" | "cc" | "cxx" | "hpp" | "hxx" => tree_sitter_cpp::LANGUAGE,
-                "go" => tree_sitter_go::LANGUAGE,
-                _ => {
-                    return Err(crate::error::AppError::Internal(format!(
-                        "Unsupported language for AST replacement: {}",
-                        ext
-                    )));
+                let ext = std::path::Path::new(&file_path)
+                    .extension()
+                    .and_then(|s| s.to_str())
+                    .unwrap_or("");
+
+                let language = match ext {
+                    "rs" => tree_sitter_rust::LANGUAGE,
+                    "ts" | "tsx" | "js" | "jsx" => tree_sitter_typescript::LANGUAGE_TYPESCRIPT,
+                    "py" => tree_sitter_python::LANGUAGE,
+                    "java" => tree_sitter_java::LANGUAGE,
+                    "c" | "h" => tree_sitter_c::LANGUAGE,
+                    "cpp" | "cc" | "cxx" | "hpp" | "hxx" => tree_sitter_cpp::LANGUAGE,
+                    "go" => tree_sitter_go::LANGUAGE,
+                    _ => {
+                        return Err(crate::error::AppError::Internal(format!(
+                            "Unsupported language for AST replacement: {}",
+                            ext
+                        )));
+                    }
+                };
+
+                parser
+                    .set_language(&language.into())
+                    .map_err(|e| crate::error::AppError::Internal(e.to_string()))?;
+                let tree = parser.parse(&code, None).ok_or_else(|| {
+                    crate::error::AppError::Internal("Failed to parse code".to_string())
+                })?;
+
+                fn matches_node_type(actual_kind: &str, requested_type: &str) -> bool {
+                    if actual_kind == requested_type {
+                        return true;
+                    }
+                    match requested_type.to_lowercase().as_str() {
+                        "function" | "func" | "fn" | "method" | "def" => matches!(
+                            actual_kind,
+                            "function_item"
+                                | "function_declaration"
+                                | "function_definition"
+                                | "method_definition"
+                                | "function"
+                        ),
+                        "struct" => matches!(
+                            actual_kind,
+                            "struct_item" | "struct_declaration" | "struct_specifier"
+                        ),
+                        "class" => matches!(
+                            actual_kind,
+                            "class_declaration" | "class_definition" | "class_item"
+                        ),
+                        "enum" => matches!(actual_kind, "enum_item" | "enum_declaration"),
+                        "trait" | "interface" => matches!(
+                            actual_kind,
+                            "trait_item" | "interface_declaration" | "interface_item"
+                        ),
+                        "impl" | "impl_item" => actual_kind == "impl_item",
+                        "type" | "type_alias" => matches!(
+                            actual_kind,
+                            "type_alias_declaration" | "type_item" | "type_definition"
+                        ),
+                        _ => false,
+                    }
                 }
-            };
 
-            parser
-                .set_language(&language.into())
-                .map_err(|e| crate::error::AppError::Internal(e.to_string()))?;
-            let tree = parser.parse(&code, None).ok_or_else(|| {
-                crate::error::AppError::Internal("Failed to parse code".to_string())
-            })?;
-
-            fn matches_node_type(actual_kind: &str, requested_type: &str) -> bool {
-                if actual_kind == requested_type {
-                    return true;
-                }
-                match requested_type.to_lowercase().as_str() {
-                    "function" | "func" | "fn" | "method" | "def" => matches!(
-                        actual_kind,
-                        "function_item"
-                            | "function_declaration"
-                            | "function_definition"
-                            | "method_definition"
-                            | "function"
-                    ),
-                    "struct" => matches!(
-                        actual_kind,
-                        "struct_item" | "struct_declaration" | "struct_specifier"
-                    ),
-                    "class" => matches!(
-                        actual_kind,
-                        "class_declaration" | "class_definition" | "class_item"
-                    ),
-                    "enum" => matches!(actual_kind, "enum_item" | "enum_declaration"),
-                    "trait" | "interface" => matches!(
-                        actual_kind,
-                        "trait_item" | "interface_declaration" | "interface_item"
-                    ),
-                    "impl" | "impl_item" => actual_kind == "impl_item",
-                    "type" | "type_alias" => matches!(
-                        actual_kind,
-                        "type_alias_declaration" | "type_item" | "type_definition"
-                    ),
-                    _ => false,
-                }
-            }
-
-            // Search for the node
-            fn find_node<'a>(
-                node: Node<'a>,
-                code: &str,
-                target_type: &str,
-                target_name: &str,
-            ) -> Option<Node<'a>> {
-                if matches_node_type(node.kind(), target_type) {
-                    // Try to find the name/identifier
-                    let mut cursor = node.walk();
-                    for child in node.children(&mut cursor) {
-                        let kind = child.kind();
-                        if kind == "identifier"
-                            || kind == "name"
-                            || kind == "type_identifier"
-                            || kind == "property_identifier"
-                            || kind == "field_identifier"
-                        {
-                            let name = child.utf8_text(code.as_bytes()).unwrap_or("");
-                            if name == target_name {
-                                return Some(node);
+                fn find_node<'a>(
+                    node: Node<'a>,
+                    code: &str,
+                    target_type: &str,
+                    target_name: &str,
+                ) -> Option<Node<'a>> {
+                    if matches_node_type(node.kind(), target_type) {
+                        let mut cursor = node.walk();
+                        for child in node.children(&mut cursor) {
+                            let kind = child.kind();
+                            if kind == "identifier"
+                                || kind == "name"
+                                || kind == "type_identifier"
+                                || kind == "property_identifier"
+                                || kind == "field_identifier"
+                            {
+                                let name = child.utf8_text(code.as_bytes()).unwrap_or("");
+                                if name == target_name {
+                                    return Some(node);
+                                }
                             }
                         }
                     }
-                }
 
-                let mut cursor = node.walk();
-                for child in node.children(&mut cursor) {
-                    if let Some(found) = find_node(child, code, target_type, target_name) {
-                        return Some(found);
+                    let mut cursor = node.walk();
+                    for child in node.children(&mut cursor) {
+                        if let Some(found) = find_node(child, code, target_type, target_name) {
+                            return Some(found);
+                        }
                     }
-                }
-                None
-            }
-
-            let target_node = find_node(
-                tree.root_node(),
-                &code,
-                &tool_args.node_type,
-                &tool_args.node_name,
-            );
-
-            if let Some(node) = target_node {
-                let start_byte = node.start_byte();
-                let end_byte = node.end_byte();
-
-                if !code.is_char_boundary(start_byte) || !code.is_char_boundary(end_byte) {
-                    return Err(crate::error::AppError::Internal(format!(
-                        "Byte offsets {}..{} do not fall on UTF-8 character boundaries in {}",
-                        start_byte, end_byte, file_path
-                    )));
+                    None
                 }
 
-                let mut new_file_content =
-                    String::with_capacity(code.len() + tool_args.new_content.len());
-                new_file_content.push_str(&code[..start_byte]);
-                new_file_content.push_str(&tool_args.new_content);
-                new_file_content.push_str(&code[end_byte..]);
+                let target_node = find_node(
+                    tree.root_node(),
+                    &code,
+                    &rep.node_type,
+                    &rep.node_name,
+                );
 
-                let target_path = std::path::PathBuf::from(&file_path);
-                let parent_dir = target_path
-                    .parent()
-                    .unwrap_or_else(|| std::path::Path::new("."));
-                let temp_file_path =
-                    parent_dir.join(format!(".tmp_ast_{}.tmp", uuid::Uuid::new_v4()));
-                std::fs::write(&temp_file_path, new_file_content).map_err(|e| crate::error::AppError::Internal(format!("Failed to write temporary file: {}", e)))?;
-                if let Err(e) = std::fs::rename(&temp_file_path, &target_path) {
-                    // On Windows, std::fs::rename fails if the target file already exists.
-                    // Fall back to copy-and-remove to ensure atomic-like overwrite behavior.
-                    if let Err(copy_err) = std::fs::copy(&temp_file_path, &target_path) {
-                        let _ = std::fs::remove_file(&temp_file_path);
+                if let Some(node) = target_node {
+                    let start_byte = node.start_byte();
+                    let end_byte = node.end_byte();
+
+                    if !code.is_char_boundary(start_byte) || !code.is_char_boundary(end_byte) {
                         return Err(crate::error::AppError::Internal(format!(
-                            "Failed to atomically overwrite {}: rename failed ({}), copy failed ({})",
-                            file_path, e, copy_err
+                            "Byte offsets {}..{} do not fall on UTF-8 character boundaries in {}",
+                            start_byte, end_byte, file_path
                         )));
                     }
-                    let _ = std::fs::remove_file(&temp_file_path);
+
+                    let mut new_file_content =
+                        String::with_capacity(code.len() + rep.new_content.len());
+                    new_file_content.push_str(&code[..start_byte]);
+                    new_file_content.push_str(&rep.new_content);
+                    new_file_content.push_str(&code[end_byte..]);
+
+                    let target_path = std::path::PathBuf::from(&file_path);
+                    let parent_dir = target_path
+                        .parent()
+                        .unwrap_or_else(|| std::path::Path::new("."));
+                    let temp_file_path =
+                        parent_dir.join(format!(".tmp_ast_{}.tmp", uuid::Uuid::new_v4()));
+                    std::fs::write(&temp_file_path, new_file_content).map_err(|e| crate::error::AppError::Internal(format!("Failed to write temporary file: {}", e)))?;
+                    if let Err(e) = std::fs::rename(&temp_file_path, &target_path) {
+                        if let Err(copy_err) = std::fs::copy(&temp_file_path, &target_path) {
+                            let _ = std::fs::remove_file(&temp_file_path);
+                            return Err(crate::error::AppError::Internal(format!(
+                                "Failed to atomically overwrite {}: rename failed ({}), copy failed ({})",
+                                file_path, e, copy_err
+                            )));
+                        }
+                        let _ = std::fs::remove_file(&temp_file_path);
+                    }
+                    msgs.push(format!(
+                        "Successfully replaced node {} of type {} in {}",
+                        rep.node_name, rep.node_type, file_path
+                    ));
+                } else {
+                    return Err(crate::error::AppError::Internal(format!(
+                        "Could not find node {} of type {} in {}",
+                        rep.node_name, rep.node_type, file_path
+                    )));
                 }
-                Ok(format!(
-                    "Successfully replaced node {} of type {} in {}",
-                    tool_args.node_name, tool_args.node_type, file_path
-                ))
-            } else {
-                Err(crate::error::AppError::Internal(format!(
-                    "Could not find node {} of type {}",
-                    tool_args.node_name, tool_args.node_type
-                )))
             }
+            Ok(msgs.join("\n"))
         })
         .await
         .map_err(|e| crate::error::AppError::Internal(format!("Task panic: {}", e)))??;
@@ -749,10 +754,14 @@ mod tests {
 
         let handler = ReplaceAstNodeHandler;
         let args = json!({
-            "file_path": file_path.to_str().unwrap(),
-            "node_type": "function_item",
-            "node_name": "my_func",
-            "new_content": "fn my_func() {\n    let x = 2;\n}"
+            "replacements": [
+                {
+                    "file_path": file_path.to_str().unwrap(),
+                    "node_type": "function_item",
+                    "node_name": "my_func",
+                    "new_content": "fn my_func() {\n    let x = 2;\n}"
+                }
+            ]
         });
 
         let res = handler.execute(args, state.clone()).await.unwrap();
diff --git a/server/src/handlers/graph.rs b/server/src/handlers/graph.rs
index 08df5f2..6638d8e 100644
--- a/server/src/handlers/graph.rs
+++ b/server/src/handlers/graph.rs
@@ -218,19 +218,25 @@ impl McpTool for UpdateEntitiesHandler {
 
         state.modify_graph(|g| {
             for update in req.updates {
-                if !g.entities.contains_key(&update.name) {
-                    not_found.push(update.name.clone());
-                    continue;
+                let mut target_name = update.name.clone();
+                if !g.entities.contains_key(&target_name) {
+                    let lower_target = target_name.to_lowercase();
+                    if let Some(matched_key) = g.entities.keys().find(|k| k.to_lowercase() == lower_target).cloned() {
+                        target_name = matched_key;
+                    } else {
+                        not_found.push(update.name.clone());
+                        continue;
+                    }
                 }
 
                 if let Some(new_name) = &update.new_name {
-                    if update.name != *new_name && g.entities.contains_key(new_name) {
+                    if target_name != *new_name && g.entities.contains_key(new_name) {
                         conflict_names.push(new_name.clone());
                         continue;
                     }
                 }
 
-                if let Some(mut entity) = g.entities.remove(&update.name) {
+                if let Some(mut entity) = g.entities.remove(&target_name) {
                     let mut renamed = false;
                     let old_name = entity.name.clone();
 
@@ -269,18 +275,6 @@ impl McpTool for UpdateEntitiesHandler {
             }
         });
 
-        if !not_found.is_empty() {
-            return Err(crate::error::AppError::Internal(format!(
-                "Error: Entities not found: {}", not_found.join(", ")
-            )));
-        }
-
-        if !conflict_names.is_empty() {
-            return Err(crate::error::AppError::Internal(format!(
-                "Error: Cannot rename to existing entity names: {}", conflict_names.join(", ")
-            )));
-        }
-
         let idx = state.get_search_index().await;
         for old_name in deleted_names {
             drop(idx.delete_document(&old_name));
@@ -291,7 +285,16 @@ impl McpTool for UpdateEntitiesHandler {
         }
 
         let names: Vec<String> = updated_entities.iter().map(|e| e.name.clone()).collect();
-        Ok(format!("Successfully updated {} entity/entities: {}", names.len(), names.join(", ")))
+        let mut msg = format!("Successfully updated {} entity/entities: {}", names.len(), names.join(", "));
+        
+        if !not_found.is_empty() {
+            msg.push_str(&format!("\nNote: {} entities were not found and skipped: {}", not_found.len(), not_found.join(", ")));
+        }
+        if !conflict_names.is_empty() {
+            msg.push_str(&format!("\nNote: {} entity renames were skipped due to name conflicts: {}", conflict_names.len(), conflict_names.join(", ")));
+        }
+        
+        Ok(msg)
     }
 }
 
@@ -459,37 +462,43 @@ impl McpTool for DeleteEntitiesHandler {
 
     async fn execute(&self, args: Value, state: Arc<MemoryState>) -> crate::error::Result<String> {
         let req: DeleteEntitiesTool = serde_json::from_value(args).map_err(|e| crate::error::AppError::BadRequest(format!("Schema validation failed. Your JSON arguments do not match the expected tool schema: {}", e)))?;
-        let to_delete: std::collections::HashSet<_> = req.entity_names.into_iter().collect();
-        let mut missing = Vec::new();
-        state.read_graph(|g| {
-            for name in &to_delete {
-                if !g.entities.contains_key(name) {
-                    missing.push(name.clone());
-                }
-            }
-        });
-
-        if !missing.is_empty() {
-            return Err(crate::error::AppError::Internal(format!(
-                "Error: Entities not found: {}. Please use the search_nodes or read_graph tools to verify the exact entity names.",
-                missing.join(", ")
-            )));
-        }
+        
+        let mut actual_deletes = Vec::new();
+        let mut not_found = Vec::new();
 
         state.modify_graph(|master| {
-            for name in &to_delete {
+            for target in req.entity_names {
+                if master.entities.contains_key(&target) {
+                    actual_deletes.push(target);
+                } else {
+                    let lower_target = target.to_lowercase();
+                    if let Some(matched_key) = master.entities.keys().find(|k| k.to_lowercase() == lower_target).cloned() {
+                        actual_deletes.push(matched_key);
+                    } else {
+                        not_found.push(target);
+                    }
+                }
+            }
+
+            for name in &actual_deletes {
                 master.entities.remove(name);
             }
+            let delete_set: std::collections::HashSet<_> = actual_deletes.iter().cloned().collect();
             master
                 .relations
-                .retain(|r| !to_delete.contains(&r.from) && !to_delete.contains(&r.to));
+                .retain(|r| !delete_set.contains(&r.from) && !delete_set.contains(&r.to));
         });
 
         let idx = state.get_search_index().await;
-        for name in to_delete {
-            drop(idx.delete_document(&name));
+        for name in &actual_deletes {
+            drop(idx.delete_document(name));
         }
-        Ok("Entities deleted".to_string())
+        
+        let mut msg = format!("Successfully deleted {} entities.", actual_deletes.len());
+        if !not_found.is_empty() {
+            msg.push_str(&format!(" Note: {} entities were not found and skipped: {}", not_found.len(), not_found.join(", ")));
+        }
+        Ok(msg)
     }
 }
 
@@ -581,7 +590,12 @@ impl McpTool for DeleteRelationsHandler {
             let initial_len = master.relations.len();
             master.relations.retain(|r| {
                 let should_delete = req.relations.iter().any(|target| {
-                    target.from == r.from && target.to == r.to && target.relation_type == r.relation_type
+                    if target.from == r.from && target.to == r.to && target.relation_type == r.relation_type {
+                        return true;
+                    }
+                    target.from.eq_ignore_ascii_case(&r.from) 
+                        && target.to.eq_ignore_ascii_case(&r.to) 
+                        && target.relation_type.eq_ignore_ascii_case(&r.relation_type)
                 });
                 !should_delete
             });
@@ -589,13 +603,11 @@ impl McpTool for DeleteRelationsHandler {
         });
         
         let missing_count = requested_count.saturating_sub(deleted_count);
+        let mut msg = format!("Successfully deleted {} relations.", deleted_count);
         if missing_count > 0 {
-            return Err(crate::error::AppError::Internal(format!(
-                "Error: {} relation(s) not found in graph. Please verify exact relation properties (from, to, relation_type) using read_graph or get_subgraph.",
-                missing_count
-            )));
+            msg.push_str(&format!(" Note: {} relations were not found and skipped.", missing_count));
         }
-        Ok("Relations deleted".to_string())
+        Ok(msg)
     }
 }
 
@@ -1601,7 +1613,7 @@ mod tests {
             .await
             .map_err(|e| crate::error::AppError::Internal(e.to_string()))
             .unwrap();
-        assert_eq!(res4, "Entities deleted");
+        assert_eq!(res4, "Successfully deleted 1 entities.");
 
         let res5 = read_graph
             .execute(json!({"namespace": "global"}), state.clone())
@@ -1774,7 +1786,7 @@ mod tests {
             )
             .await
             .unwrap();
-        assert_eq!(del_rel_res, "Relations deleted");
+        assert_eq!(del_rel_res, "Successfully deleted 1 relations.");
 
         let bcast_handler = AgentSignalsHandler;
         let bcast_res = bcast_handler
diff --git a/server/src/tools.rs b/server/src/tools.rs
index 19311c5..ffe7a2c 100644
--- a/server/src/tools.rs
+++ b/server/src/tools.rs
@@ -498,8 +498,8 @@ pub struct ReadFileSkeletonTool {
     pub file_path: String,
 }
 /// Replace a specific AST node in a file (robust structural editing). Use this instead of regex or line-based string replacement to prevent indentation bugs and matching failures.
-#[derive(Debug, Deserialize, Serialize, JsonSchema)]
-pub struct ReplaceAstNodeTool {
+#[derive(Debug, Deserialize, Serialize, JsonSchema, Clone)]
+pub struct AstNodeReplacement {
     /// The path of the file to modify.
     pub file_path: String,
     /// The AST node type to replace (e.g., 'function_item', 'impl_item').
@@ -510,6 +510,12 @@ pub struct ReplaceAstNodeTool {
     pub new_content: String,
 }
 
+#[derive(Debug, Deserialize, Serialize, JsonSchema)]
+pub struct ReplaceAstNodeTool {
+    /// Array of AST node replacements to execute in bulk.
+    pub replacements: Vec<AstNodeReplacement>,
+}
+
 /// Semantic code search using local vector embeddings. Use this conceptual search instead of raw regex (grep) when trying to locate abstract logic or exploring new patterns.
 #[derive(Debug, Deserialize, Serialize, JsonSchema)]
 pub struct SemanticCodeSearchTool {