fix(server): forward requestContext through approve/decline tool-call REST handlers (#15620)

Author: bryanTechera

.changeset/fix-approve-tool-call-request-context.md

@@ -0,0 +1,7 @@
+---
+'@mastra/server': patch
+---
+
+Forward `requestContext` from the `/approve-tool-call`, `/decline-tool-call`, `/approve-tool-call-generate` and `/decline-tool-call-generate` REST handlers to `agent.approveToolCall(...)` / `declineToolCall(...)` / `approveToolCallGenerate(...)` / `declineToolCallGenerate(...)`.
+
+Previously `requestContext` was destructured from the handler arguments but never passed through. On resume, `dynamicInstructions` ran with `requestContext: undefined`, so any value placed on the per-request `RequestContext` by upstream middleware (or by `body.requestContext` auto-merge) was lost for the rest of the turn. Agents whose prompt assembly depends on request-scoped data (e.g. read-only state from the frontend) produced blank or placeholder responses after the user approved a HITL tool call. Other agent entry points (`stream`, `generate`) already forwarded `requestContext` correctly; this brings the approval routes in line.

packages/server/src/server/handlers/agents.ts

@@ -1453,6 +1453,7 @@ export const APPROVE_TOOL_CALL_ROUTE = createRoute({
 
       const streamResult = await agent.approveToolCall({
         ...params,
+        requestContext,
         abortSignal,
       });
 
@@ -1497,6 +1498,7 @@ export const DECLINE_TOOL_CALL_ROUTE = createRoute({
 
       const streamResult = await agent.declineToolCall({
         ...params,
+        requestContext,
         abortSignal,
       });
 
@@ -1540,6 +1542,7 @@ export const APPROVE_TOOL_CALL_GENERATE_ROUTE = createRoute({
 
       const result = await agent.approveToolCallGenerate({
         ...params,
+        requestContext,
         abortSignal,
       });
 
@@ -1583,6 +1586,7 @@ export const DECLINE_TOOL_CALL_GENERATE_ROUTE = createRoute({
 
       const result = await agent.declineToolCallGenerate({
         ...params,
+        requestContext,
         abortSignal,
       });