diff --git a/apps/orchestrator/src/api/agents/agents.controller.spec.ts b/apps/orchestrator/src/api/agents/agents.controller.spec.ts
index bd4d7ad..c63f8b6 100644
--- a/apps/orchestrator/src/api/agents/agents.controller.spec.ts
+++ b/apps/orchestrator/src/api/agents/agents.controller.spec.ts
@@ -3,7 +3,6 @@ import { QueueService } from "../../queue/queue.service";
 import { AgentSpawnerService } from "../../spawner/agent-spawner.service";
 import { AgentLifecycleService } from "../../spawner/agent-lifecycle.service";
 import { KillswitchService } from "../../killswitch/killswitch.service";
-import { BadRequestException } from "@nestjs/common";
 import { describe, it, expect, beforeEach, afterEach, vi } from "vitest";
 
 describe("AgentsController", () => {
@@ -289,80 +288,6 @@ describe("AgentsController", () => {
       expect(result.agentId).toBe(agentId);
     });
 
-    it("should throw BadRequestException when taskId is missing", async () => {
-      // Arrange
-      const invalidRequest = {
-        agentType: "worker" as const,
-        context: validRequest.context,
-      } as unknown as typeof validRequest;
-
-      // Act & Assert
-      await expect(controller.spawn(invalidRequest)).rejects.toThrow(BadRequestException);
-      expect(spawnerService.spawnAgent).not.toHaveBeenCalled();
-      expect(queueService.addTask).not.toHaveBeenCalled();
-    });
-
-    it("should throw BadRequestException when agentType is invalid", async () => {
-      // Arrange
-      const invalidRequest = {
-        ...validRequest,
-        agentType: "invalid" as unknown as "worker",
-      };
-
-      // Act & Assert
-      await expect(controller.spawn(invalidRequest)).rejects.toThrow(BadRequestException);
-      expect(spawnerService.spawnAgent).not.toHaveBeenCalled();
-      expect(queueService.addTask).not.toHaveBeenCalled();
-    });
-
-    it("should throw BadRequestException when repository is missing", async () => {
-      // Arrange
-      const invalidRequest = {
-        ...validRequest,
-        context: {
-          ...validRequest.context,
-          repository: "",
-        },
-      };
-
-      // Act & Assert
-      await expect(controller.spawn(invalidRequest)).rejects.toThrow(BadRequestException);
-      expect(spawnerService.spawnAgent).not.toHaveBeenCalled();
-      expect(queueService.addTask).not.toHaveBeenCalled();
-    });
-
-    it("should throw BadRequestException when branch is missing", async () => {
-      // Arrange
-      const invalidRequest = {
-        ...validRequest,
-        context: {
-          ...validRequest.context,
-          branch: "",
-        },
-      };
-
-      // Act & Assert
-      await expect(controller.spawn(invalidRequest)).rejects.toThrow(BadRequestException);
-      expect(spawnerService.spawnAgent).not.toHaveBeenCalled();
-      expect(queueService.addTask).not.toHaveBeenCalled();
-    });
-
-    it("should throw BadRequestException when workItems is empty", async () => {
-      // Arrange
-      const invalidRequest = {
-        ...validRequest,
-        context: {
-          ...validRequest.context,
-          workItems: [],
-        },
-      };
-
-      // Act & Assert
-      await expect(controller.spawn(invalidRequest)).rejects.toThrow(BadRequestException);
-      expect(spawnerService.spawnAgent).not.toHaveBeenCalled();
-      expect(queueService.addTask).not.toHaveBeenCalled();
-    });
-
     it("should propagate errors from spawner service", async () => {
       // Arrange
       const error = new Error("Spawner failed");
diff --git a/apps/orchestrator/src/api/agents/agents.controller.ts b/apps/orchestrator/src/api/agents/agents.controller.ts
index fb46d7b..1d54ea9 100644
--- a/apps/orchestrator/src/api/agents/agents.controller.ts
+++ b/apps/orchestrator/src/api/agents/agents.controller.ts
@@ -4,7 +4,6 @@ import {
   Get,
   Body,
   Param,
-  BadRequestException,
   NotFoundException,
   Logger,
   UsePipes,
@@ -57,8 +56,9 @@ export class AgentsController {
     this.logger.log(`Received spawn request for task: ${dto.taskId}`);
 
     try {
-      // Validate request manually (in addition to ValidationPipe)
-      this.validateSpawnRequest(dto);
+      // Validation is handled by:
+      // 1. ValidationPipe + DTO decorators at the HTTP layer
+      // 2. AgentSpawnerService.validateSpawnRequest for business logic
 
       // Spawn agent using spawner service
       const spawnResponse = this.spawnerService.spawnAgent({
@@ -243,32 +243,4 @@ export class AgentsController {
       throw error;
     }
   }
-
-  /**
-   * Validate spawn request
-   * @param dto Spawn request to validate
-   * @throws BadRequestException if validation fails
-   */
-  private validateSpawnRequest(dto: SpawnAgentDto): void {
-    if (!dto.taskId || dto.taskId.trim() === "") {
-      throw new BadRequestException("taskId is required");
-    }
-
-    const validAgentTypes = ["worker", "reviewer", "tester"];
-    if (!validAgentTypes.includes(dto.agentType)) {
-      throw new BadRequestException(`agentType must be one of: ${validAgentTypes.join(", ")}`);
-    }
-
-    if (!dto.context.repository || dto.context.repository.trim() === "") {
-      throw new BadRequestException("context.repository is required");
-    }
-
-    if (!dto.context.branch || dto.context.branch.trim() === "") {
-      throw new BadRequestException("context.branch is required");
-    }
-
-    if (dto.context.workItems.length === 0) {
-      throw new BadRequestException("context.workItems must not be empty");
-    }
-  }
 }