diff --git a/src/__tests__/utils.test.ts b/src/__tests__/utils.test.ts
index 05979b0..ed0bf40 100644
--- a/src/__tests__/utils.test.ts
+++ b/src/__tests__/utils.test.ts
@@ -1,4 +1,4 @@
-import { calculateConfigHash, toCamelCaseKeys, generateUniqueFilename } from "../shared/utils";
+import { calculateConfigHash, toCamelCaseKeys, toSnakeCaseKeys, generateUniqueFilename } from "../shared/utils";
 import fs from "fs-extra";
 import path from "path";
 import os from "os";
@@ -365,6 +365,121 @@ describe("Utils", () => {
         },
       });
     });
+
+    it("should preserve request_headers in toSnakeCaseKeys for symmetry", () => {
+      const input = {
+        conversationConfig: {
+          agent: {
+            prompt: {
+              tools: [
+                {
+                  type: "webhook",
+                  apiSchema: {
+                    url: "https://example.com/webhook",
+                    method: "GET",
+                    requestHeaders: {
+                      "Content-Type": "application/json",
+                      "X-Api-Key": {
+                        secretId: "abc"
+                      },
+                      "Authorization": {
+                        variableName: "auth_token"
+                      }
+                    }
+                  }
+                }
+              ]
+            }
+          }
+        }
+      };
+
+      const result = toSnakeCaseKeys(input);
+
+      expect(result).toEqual({
+        conversation_config: {
+          agent: {
+            prompt: {
+              tools: [
+                {
+                  type: "webhook",
+                  api_schema: {
+                    url: "https://example.com/webhook",
+                    method: "GET",
+                    request_headers: {
+                      "Content-Type": "application/json",
+                      "X-Api-Key": {
+                        secretId: "abc" // Should NOT be converted to secret_id
+                      },
+                      "Authorization": {
+                        variableName: "auth_token" // Should NOT be converted to variable_name
+                      }
+                    }
+                  }
+                }
+              ]
+            }
+          }
+        }
+      });
+    });
+
+    it("should maintain round-trip conversion symmetry for request_headers", () => {
+      const original = {
+        conversation_config: {
+          agent: {
+            prompt: {
+              tools: [
+                {
+                  type: "webhook",
+                  api_schema: {
+                    url: "https://example.com/webhook",
+                    method: "POST",
+                    request_headers: {
+                      "Content-Type": "application/json",
+                      "X-Api-Key": {
+                        secretId: "my_secret_123"
+                      }
+                    }
+                  }
+                }
+              ]
+            }
+          }
+        }
+      };
+
+      // Simulate pull (API → local file): camelCase → snake_case
+      const afterPull = toSnakeCaseKeys(toCamelCaseKeys(original));
+
+      // Simulate push (local file → API): snake_case → camelCase
+      const afterPush = toCamelCaseKeys(afterPull);
+
+      // After round-trip, request_headers internals should be preserved
+      expect(afterPush).toEqual({
+        conversationConfig: {
+          agent: {
+            prompt: {
+              tools: [
+                {
+                  type: "webhook",
+                  apiSchema: {
+                    url: "https://example.com/webhook",
+                    method: "POST",
+                    requestHeaders: {
+                      "Content-Type": "application/json",
+                      "X-Api-Key": {
+                        secretId: "my_secret_123" // Should be preserved through round-trip
+                      }
+                    }
+                  }
+                }
+              ]
+            }
+          }
+        }
+      });
+    });
   });
 
   describe("generateUniqueFilename", () => {
diff --git a/src/shared/utils.ts b/src/shared/utils.ts
index ba6500f..656c122 100644
--- a/src/shared/utils.ts
+++ b/src/shared/utils.ts
@@ -139,14 +139,21 @@ export function toCamelCaseKeys<T = unknown>(value: T, skipHeaderConversion = fa
   return value;
 }
 
-export function toSnakeCaseKeys<T = unknown>(value: T): T {
+export function toSnakeCaseKeys<T = unknown>(value: T, skipHeaderConversion = false): T {
   if (Array.isArray(value)) {
-    return (value.map((v) => toSnakeCaseKeys(v)) as unknown) as T;
+    return (value.map((v) => toSnakeCaseKeys(v, skipHeaderConversion)) as unknown) as T;
   }
   if (isPlainObject(value)) {
     const result: Record<string, unknown> = {};
     for (const [k, v] of Object.entries(value)) {
-      result[toSnakeCaseKey(k)] = toSnakeCaseKeys(v);
+      if (skipHeaderConversion) {
+        // Inside request_headers/requestHeaders: preserve all keys as-is to avoid converting
+        // header names like "X-Api-Key" or nested keys like "secret_id"
+        result[k] = toSnakeCaseKeys(v, true);
+      } else {
+        // Normal conversion
+        result[toSnakeCaseKey(k)] = toSnakeCaseKeys(v, k === 'request_headers' || k === 'requestHeaders');
+      }
     }
     return (result as unknown) as T;
   }