diff --git a/.changeset/20260918094326-regenerate-sdk-from-openapi.md b/.changeset/20260918094326-regenerate-sdk-from-openapi.md
new file mode 100644
index 000000000..efd8ff00f
--- /dev/null
+++ b/.changeset/20260918094326-regenerate-sdk-from-openapi.md
@@ -0,0 +1,5 @@
+---
+"@truefoundry/trueforge-sdk": patch
+---
+
+Regenerate SDK from updated OpenAPI spec.
diff --git a/.changeset/user-tool-approval-policy-event.md b/.changeset/user-tool-approval-policy-event.md
new file mode 100644
index 000000000..97d861d6b
--- /dev/null
+++ b/.changeset/user-tool-approval-policy-event.md
@@ -0,0 +1,6 @@
+---
+"@truefoundry/trueforge-core": patch
+"@truefoundry/trueforge": patch
+---
+
+Add `user.tool_approval_policy` send-event schema (`allow_session`, optional ISO `expire_at`). Send-only like `user.tool_approval` / `user.tool_response` — not on the durable stream.
diff --git a/packages/trueforge-core/src/agent-session/schemas/sendEvent.ts b/packages/trueforge-core/src/agent-session/schemas/sendEvent.ts
index f25a46587..b1f9107ec 100644
--- a/packages/trueforge-core/src/agent-session/schemas/sendEvent.ts
+++ b/packages/trueforge-core/src/agent-session/schemas/sendEvent.ts
@@ -1,17 +1,26 @@
 /**
- * Inbound send-event payloads for tip HITL (client → harness), distinct from the
- * stream log ({@link PersistedTurnEvent} / session_event).
+ * Inbound send-event payloads (client → harness), distinct from the stream log
+ * ({@link PersistedTurnEvent} / session_event).
  *
- * Public send is session-scoped (`POST …/sessions/{id}/events`) with required
- * body `turn_id` (one batch → one tip) plus `SessionInboundEventItem`s; rows stamp that
- * tip id. v1 union is tip-only; approval policies may relax `turn_id` later.
+ * Public send is session-scoped (`POST …/sessions/{id}/events`) with body
+ * `turn_id` + items. Tip HITL uses approval/tool_response; sticky policies use
+ * `user.tool_approval_policy` (session `allow_session`, optional expiry; may later
+ * relax tip binding). Per-call allow/deny stays on `user.tool_approval`.
  * `user.message` stays on createTurn / steer.
  */
 import { z } from '@hono/zod-openapi';
-import { UserToolApprovalMessageSchema, UserToolResponseMessageSchema } from '../../core/events/schema';
+import {
+  UserToolApprovalMessageSchema,
+  UserToolApprovalPolicyMessageSchema,
+  UserToolResponseMessageSchema,
+} from '../../core/events/schema';
 
 export const SessionInboundEventItemSchema = z
-  .discriminatedUnion('type', [UserToolApprovalMessageSchema, UserToolResponseMessageSchema])
-  .openapi('SessionInboundEventItem');
+  .discriminatedUnion('type', [
+    UserToolApprovalMessageSchema,
+    UserToolResponseMessageSchema,
+    UserToolApprovalPolicyMessageSchema,
+  ])
+  .openapi('SendTurnEventItem');
 
 export type SessionInboundEventItem = z.infer<typeof SessionInboundEventItemSchema>;
diff --git a/packages/trueforge-core/src/core/events/schema.ts b/packages/trueforge-core/src/core/events/schema.ts
index bdced8eda..0f4067c6f 100644
--- a/packages/trueforge-core/src/core/events/schema.ts
+++ b/packages/trueforge-core/src/core/events/schema.ts
@@ -40,6 +40,7 @@ export const EventType = {
   TOOL_RESPONSE_REQUIRED: 'tool.response_required',
   USER_TOOL_APPROVAL: 'user.tool_approval',
   USER_TOOL_RESPONSE: 'user.tool_response',
+  USER_TOOL_APPROVAL_POLICY: 'user.tool_approval_policy',
   USER_MESSAGE: 'user.message',
 } as const;
 
@@ -96,6 +97,37 @@ export const UserToolResponseMessageSchema = z
   })
   .openapi('UserToolResponseEvent');
 
+export const ToolApprovalPolicyAllowSessionSchema = z
+  .object({
+    type: z.literal('allow_session').describe('Allow matching tool calls for the rest of this session.'),
+    expire_at: z
+      .string()
+      .optional()
+      .describe('ISO 8601 timestamp when this session allow expires. Omit to allow for the whole session.'),
+  })
+  .openapi('ToolApprovalPolicyAllowSession');
+
+export const ToolApprovalPolicyItemSchema = z
+  .object({
+    server: z.string().min(1, 'server is required').describe('MCP server name the tool belongs to.'),
+    tool_name: z.string().min(1, 'tool_name is required').describe('Tool name this policy applies to.'),
+    action: z.discriminatedUnion('type', [ToolApprovalPolicyAllowSessionSchema]),
+  })
+  .openapi('ToolApprovalPolicyItem');
+
+/**
+ * Client inbound sticky approval policy (send-event only; not on the durable stream).
+ * Same pattern as {@link UserToolApprovalMessageSchema} / {@link UserToolResponseMessageSchema}.
+ */
+export const UserToolApprovalPolicyMessageSchema = z
+  .object({
+    type: z
+      .literal(EventType.USER_TOOL_APPROVAL_POLICY)
+      .describe('Sticky allow-session policy for matching tools (optional expiry).'),
+    policies: z.array(ToolApprovalPolicyItemSchema).min(1).describe('One or more (server, tool_name) policy entries.'),
+  })
+  .openapi('UserToolApprovalPolicyEvent');
+
 export const TextContentPartSchema = z
   .object({
     type: z.literal('text').describe('Text content part.'),
@@ -373,6 +405,8 @@ export type AgentInfo = z.infer<typeof AgentInfoSchema>;
 export type ApprovalDecision = z.infer<typeof ApprovalDecisionSchema>;
 export type UserToolApprovalMessage = z.infer<typeof UserToolApprovalMessageSchema>;
 export type UserToolResponseMessage = z.infer<typeof UserToolResponseMessageSchema>;
+export type ToolApprovalPolicyItem = z.infer<typeof ToolApprovalPolicyItemSchema>;
+export type UserToolApprovalPolicyMessage = z.infer<typeof UserToolApprovalPolicyMessageSchema>;
 export type AgentApprovalDecisionMessage = z.infer<typeof AgentApprovalDecisionMessageSchema>;
 export type InputTokensBreakdown = z.infer<typeof InputTokensBreakdownSchema>;
 export type ModelMessageUsage = z.infer<typeof ModelMessageUsageSchema>;
diff --git a/packages/trueforge-core/src/core/index.ts b/packages/trueforge-core/src/core/index.ts
index 76538942f..77f629469 100644
--- a/packages/trueforge-core/src/core/index.ts
+++ b/packages/trueforge-core/src/core/index.ts
@@ -114,6 +114,7 @@ export {
   ToolResponseEventSchema,
   ToolResponseRequiredEventSchema,
   UserToolApprovalMessageSchema,
+  UserToolApprovalPolicyMessageSchema,
   UserToolResponseMessageSchema,
   newEventId,
 } from './events/schema';
@@ -124,6 +125,7 @@ export type {
   MCPServerInitInfo,
   ThreadDoneEvent,
   ThreadOverwriteContextEvent,
+  UserToolApprovalPolicyMessage,
 } from './events/schema';
 export { CompletionUsageSchema } from './llm/LLMTypes';
 export type { CompletionUsage } from './llm/LLMTypes';