feat(monetization): Add A2A Routing Fee and Developer Ad Placeholder

apps/web/src/app/api/mcp/[tool]/route.ts

@@ -716,13 +716,17 @@ export async function POST(request: NextRequest, props: { params: Promise<{ tool
              throw new Error("Sub-task reward cannot exceed parent task reward");
           }
 
+          // 5% Platform Routing Fee for A2A Subcontracting
+          const platformFee = Math.floor(parsed.reward_amount * 0.05);
+          const subTaskReward = parsed.reward_amount - platformFee;
+
           const newTask = await tx.task.create({
             data: {
               title: `[Sub-Task] ${parsed.title}`,
               description: parsed.description,
               status: TaskStatus.OPEN,
               difficulty: "HELLO_WORLD",
-              reward_amount: parsed.reward_amount,
+              reward_amount: subTaskReward,
               reward_currency: claim.held_currency,
               required_stack: ["A2A", "Agent Sub-Task"],
               scope_clarity_score: 1.0,
@@ -743,6 +747,22 @@ export async function POST(request: NextRequest, props: { params: Promise<{ tool
             afterState: { status: TaskStatus.OPEN, parent: claim.task_id }
           });
 
+          if (platformFee > 0) {
+            await logAuditEvent(tx, {
+              actorType: "SYSTEM",
+              actorId: "PLATFORM",
+              action: "PLATFORM_FEE_COLLECTED",
+              entityType: "TASK",
+              entityId: newTask.id,
+              message: `A2A Routing Fee Collected: ${platformFee} ${claim.held_currency}`,
+              metadata: {
+                fee_amount: platformFee,
+                currency: claim.held_currency,
+                original_reward: parsed.reward_amount
+              }
+            });
+          }
+
           return newTask;
         });
 

apps/web/src/app/tasks/[id]/page.tsx

@@ -104,6 +104,31 @@ export default async function TaskDetails({ params }: { params: Promise<{ id: st
                 </div>
               </section>
             </div>
+
+            {/* Right Column: Sponsored Ad / Monetization */}
+            <div className="md:col-span-1">
+              <div className="bg-gray-950 border border-gray-800 rounded-2xl p-6 sticky top-8 shadow-xl">
+                <div className="flex items-center justify-between mb-4">
+                  <span className="text-[10px] text-gray-500 uppercase tracking-widest font-bold">Sponsored</span>
+                  <span className="text-[10px] text-gray-600 bg-gray-900 px-2 py-0.5 rounded">Ad</span>
+                </div>
+                
+                <a href="#" className="block bg-gray-900 border border-gray-800 rounded-xl p-5 flex flex-col items-center text-center hover:border-blue-500/50 transition-all duration-300 cursor-pointer group relative overflow-hidden hover:shadow-2xl hover:shadow-blue-500/10">
+                  <div className="absolute inset-0 bg-gradient-to-br from-blue-500/5 to-purple-500/5 opacity-0 group-hover:opacity-100 transition-opacity"></div>
+                  
+                  <div className="w-14 h-14 bg-gradient-to-br from-gray-800 to-gray-900 rounded-xl flex items-center justify-center mb-4 border border-gray-700 group-hover:scale-110 transition-transform duration-300 shadow-inner">
+                    <span className="text-2xl">⚡️</span>
+                  </div>
+                  
+                  <h4 className="text-gray-100 font-bold mb-2 group-hover:text-blue-400 transition-colors">Build faster with Vercel</h4>
+                  <p className="text-xs text-gray-400 mb-5 leading-relaxed">Deploy your AI agents instantly. Zero configuration required. The platform for frontend frameworks and static sites.</p>
+                  
+                  <button className="w-full bg-gray-100 text-gray-900 font-semibold py-2.5 rounded-lg text-sm hover:bg-white transition-colors">
+                    Start Free Trial
+                  </button>
+                </a>
+              </div>
+            </div>
           </div>
 
           <div className="bg-gray-950 rounded-xl p-6 border border-gray-800 mt-8">