diff --git a/js/core/src/action.ts b/js/core/src/action.ts
index a767dcedf0..dfbea2e570 100644
--- a/js/core/src/action.ts
+++ b/js/core/src/action.ts
@@ -157,6 +157,8 @@ export type Action<
   ): StreamingResponse<O, S>;
 };
 
+export type ActionSchemaMode = 'none' | 'validate' | 'parse';
+
 /**
  * Action factory params.
  */
@@ -165,6 +167,7 @@ export type ActionParams<
   O extends z.ZodTypeAny,
   S extends z.ZodTypeAny = z.ZodTypeAny,
 > = {
+  /** Name of the action. */
   name:
     | string
     | {
@@ -180,6 +183,7 @@ export type ActionParams<
   use?: Middleware<z.infer<I>, z.infer<O>, z.infer<S>>[];
   streamSchema?: S;
   actionType: ActionType;
+  schemaMode?: ActionSchemaMode;
 };
 
 export type ActionAsyncParams<
@@ -312,10 +316,15 @@ export function action<
     input: z.infer<I>,
     options?: ActionRunOptions<z.infer<S>>
   ): Promise<ActionResult<z.infer<O>>> => {
-    input = parseSchema(input, {
-      schema: config.inputSchema,
-      jsonSchema: config.inputJsonSchema,
-    });
+    if (!config.schemaMode || config.schemaMode === 'validate') {
+      parseSchema(input, {
+        schema: config.inputSchema,
+        jsonSchema: config.inputJsonSchema,
+      });
+    } else if (config.schemaMode === 'parse' && config.inputSchema) {
+      console.log(' - - - - - - - parsing....', input);
+      input = config.inputSchema.parse(input);
+    }
     let traceId;
     let spanId;
     let output = await runInNewSpan(
@@ -366,7 +375,15 @@ export function action<
             });
           // if context is explicitly passed in, we run action with the provided context,
           // otherwise we let upstream context carry through.
-          const output = await runWithContext(options?.context, actFn);
+          let output = await runWithContext(options?.context, actFn);
+          if (!config.schemaMode || config.schemaMode === 'validate') {
+            parseSchema(output, {
+              schema: config.outputSchema,
+              jsonSchema: config.outputJsonSchema,
+            });
+          } else if (config.schemaMode === 'parse' && config.outputSchema) {
+            output = config.outputSchema.parse(output);
+          }
 
           metadata.output = JSON.stringify(output);
           return output;
@@ -378,10 +395,6 @@ export function action<
         }
       }
     );
-    output = parseSchema(output, {
-      schema: config.outputSchema,
-      jsonSchema: config.outputJsonSchema,
-    });
     return {
       result: output,
       telemetry: {
diff --git a/js/core/src/flow.ts b/js/core/src/flow.ts
index 56c3a3d6b9..fcc0564c6b 100644
--- a/js/core/src/flow.ts
+++ b/js/core/src/flow.ts
@@ -15,7 +15,7 @@
  */
 
 import type { z } from 'zod';
-import { ActionFnArg, action, type Action } from './action.js';
+import { ActionFnArg, ActionParams, action, type Action } from './action.js';
 import { Registry, type HasRegistry } from './registry.js';
 import { SPAN_TYPE_ATTR, runInNewSpan } from './tracing.js';
 
@@ -35,17 +35,8 @@ export interface FlowConfig<
   I extends z.ZodTypeAny = z.ZodTypeAny,
   O extends z.ZodTypeAny = z.ZodTypeAny,
   S extends z.ZodTypeAny = z.ZodTypeAny,
-> {
-  /** Name of the flow. */
+> extends Omit<ActionParams<I, O, S>, 'actionType'> {
   name: string;
-  /** Schema of the input to the flow. */
-  inputSchema?: I;
-  /** Schema of the output from the flow. */
-  outputSchema?: O;
-  /** Schema of the streaming chunks from the flow. */
-  streamSchema?: S;
-  /** Metadata of the flow used by tooling. */
-  metadata?: Record<string, any>;
 }
 
 /**
@@ -115,11 +106,7 @@ function flowAction<
   return action(
     {
       actionType: 'flow',
-      name: config.name,
-      inputSchema: config.inputSchema,
-      outputSchema: config.outputSchema,
-      streamSchema: config.streamSchema,
-      metadata: config.metadata,
+      ...config,
     },
     async (
       input,
diff --git a/js/core/tests/flow_test.ts b/js/core/tests/flow_test.ts
index d6af65f60a..60b425a150 100644
--- a/js/core/tests/flow_test.ts
+++ b/js/core/tests/flow_test.ts
@@ -142,6 +142,98 @@ describe('flow', () => {
         }
       );
     });
+
+    it('should parse schema in parse schemaMode', async () => {
+      const testFlow = defineFlow(
+        registry,
+        {
+          name: 'testFlow',
+          inputSchema: z.object({
+            foo: z.string().default('default foo'),
+          }),
+          outputSchema: z.object({
+            input: z
+              .object({
+                foo: z.string().optional(),
+              })
+              .optional(),
+            bar: z.string().transform((val) => `${val}-transformed`),
+          }),
+          schemaMode: 'parse',
+        },
+        async (input) => {
+          return { input, bar: 'bar' };
+        }
+      );
+
+      const result = await testFlow({} as any);
+
+      assert.deepStrictEqual(result, {
+        bar: 'bar-transformed',
+        input: {
+          foo: 'default foo',
+        },
+      });
+    });
+
+    it('should only-validate schema in validate schemaMode', async () => {
+      const testFlow = defineFlow(
+        registry,
+        {
+          name: 'testFlow',
+          inputSchema: z.object({
+            foo: z.string().default('default foo'),
+          }),
+          outputSchema: z.object({
+            input: z
+              .object({
+                foo: z.string().optional(),
+              })
+              .optional(),
+            bar: z.string().transform((val) => `${val}-transformed`),
+          }),
+          schemaMode: 'validate',
+        },
+        async (input) => {
+          return { input, bar: 'bar' };
+        }
+      );
+
+      const result = await testFlow({} as any);
+
+      assert.deepStrictEqual(result, {
+        bar: 'bar',
+        input: {},
+      });
+    });
+
+    it('should ignore schema in none schemaMode', async () => {
+      const testFlow = defineFlow(
+        registry,
+        {
+          name: 'testFlow',
+          inputSchema: z.object({
+            foo: z.string().transform((val) => `${val}-transformed`),
+          }),
+          outputSchema: z.object({
+            bar: z.string().transform((val) => `${val}-transformed`),
+          }),
+          schemaMode: 'none',
+        },
+        async (input) => {
+          return { seriously: 'banana', input } as any;
+        }
+      );
+
+      const result = await testFlow({ banana: 'yeah' } as any);
+
+      assert.deepStrictEqual(result, {
+        input: {
+          banana: 'yeah',
+        },
+        seriously: 'banana',
+      });
+    });
   });
 
   describe('getContext', () => {