diff --git a/package-lock.json b/package-lock.json
index b0700d5..4ced088 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,6 +15,7 @@
         "@nestjs/config": "^4.0.3",
         "@nestjs/core": "^11.1.18",
         "@nestjs/platform-express": "^11.1.18",
+        "@nestjs/schedule": "^6.1.1",
         "@nestjs/swagger": "^11.2.6",
         "@nestjs/typeorm": "^11.0.1",
         "acorn": "^8.16.0",
@@ -1174,6 +1175,19 @@
         "@nestjs/core": "^11.0.0"
       }
     },
+    "node_modules/@nestjs/schedule": {
+      "version": "6.1.1",
+      "resolved": "https://registry.npmjs.org/@nestjs/schedule/-/schedule-6.1.1.tgz",
+      "integrity": "sha512-kQl1RRgi02GJ0uaUGCrXHCcwISsCsJDciCKe38ykJZgnAeeoeVWs8luWtBo4AqAAXm4nS5K8RlV0smHUJ4+2FA==",
+      "license": "MIT",
+      "dependencies": {
+        "cron": "4.4.0"
+      },
+      "peerDependencies": {
+        "@nestjs/common": "^10.0.0 || ^11.0.0",
+        "@nestjs/core": "^10.0.0 || ^11.0.0"
+      }
+    },
     "node_modules/@nestjs/schematics": {
       "version": "11.0.10",
       "resolved": "https://registry.npmjs.org/@nestjs/schematics/-/schematics-11.0.10.tgz",
@@ -1468,6 +1482,12 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/luxon": {
+      "version": "3.7.1",
+      "resolved": "https://registry.npmjs.org/@types/luxon/-/luxon-3.7.1.tgz",
+      "integrity": "sha512-H3iskjFIAn5SlJU7OuxUmTEpebK6TKB8rxZShDslBMZJ5u9S//KM1sbdAisiSrqwLQncVjnpi2OK2J51h+4lsg==",
+      "license": "MIT"
+    },
     "node_modules/@types/mozilla__readability": {
       "version": "0.4.2",
       "resolved": "https://registry.npmjs.org/@types/mozilla__readability/-/mozilla__readability-0.4.2.tgz",
@@ -2445,6 +2465,23 @@
         }
       }
     },
+    "node_modules/cron": {
+      "version": "4.4.0",
+      "resolved": "https://registry.npmjs.org/cron/-/cron-4.4.0.tgz",
+      "integrity": "sha512-fkdfq+b+AHI4cKdhZlppHveI/mgz2qpiYxcm+t5E5TsxX7QrLS1VE0+7GENEk9z0EeGPcpSciGv6ez24duWhwQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/luxon": "~3.7.0",
+        "luxon": "~3.7.0"
+      },
+      "engines": {
+        "node": ">=18.x"
+      },
+      "funding": {
+        "type": "ko-fi",
+        "url": "https://ko-fi.com/intcreator"
+      }
+    },
     "node_modules/cross-spawn": {
       "version": "7.0.6",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.6.tgz",
@@ -3836,6 +3873,15 @@
         "node": "20 || >=22"
       }
     },
+    "node_modules/luxon": {
+      "version": "3.7.2",
+      "resolved": "https://registry.npmjs.org/luxon/-/luxon-3.7.2.tgz",
+      "integrity": "sha512-vtEhXh/gNjI9Yg1u4jX/0YVPMvxzHuGgCm6tC5kZyb08yjGWGnqAjGJvcXbqQR2P3MyMEFnRbpcdFS6PBcLqew==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      }
+    },
     "node_modules/magic-string": {
       "version": "0.30.17",
       "resolved": "https://registry.npmjs.org/magic-string/-/magic-string-0.30.17.tgz",
diff --git a/package.json b/package.json
index 15c3b6d..15a285a 100644
--- a/package.json
+++ b/package.json
@@ -19,6 +19,7 @@
     "@nestjs/config": "^4.0.3",
     "@nestjs/core": "^11.1.18",
     "@nestjs/platform-express": "^11.1.18",
+    "@nestjs/schedule": "^6.1.1",
     "@nestjs/swagger": "^11.2.6",
     "@nestjs/typeorm": "^11.0.1",
     "acorn": "^8.16.0",
diff --git a/src/app.module.ts b/src/app.module.ts
index f47e855..752749f 100644
--- a/src/app.module.ts
+++ b/src/app.module.ts
@@ -1,6 +1,7 @@
 import { Module } from '@nestjs/common';
 import { ConfigModule, ConfigService } from '@nestjs/config';
 import { TypeOrmModule } from '@nestjs/typeorm';
+import { ScheduleModule } from '@nestjs/schedule';
 import { HealthController } from './health/health.controller';
 import { AuthModule } from './auth/auth.module';
 import { BrowserModule } from './browser/browser.module';
@@ -20,6 +21,7 @@ import { ScenarioModule } from './scenario/scenario.module';
       isGlobal: true,
       envFilePath: '.env',
     }),
+    ScheduleModule.forRoot(),
     TypeOrmModule.forRootAsync({
       inject: [ConfigService],
       useFactory: (config: ConfigService) => ({
diff --git a/src/scenario/dto/runs-query.dto.ts b/src/scenario/dto/runs-query.dto.ts
new file mode 100644
index 0000000..8e2410b
--- /dev/null
+++ b/src/scenario/dto/runs-query.dto.ts
@@ -0,0 +1,28 @@
+import { ApiPropertyOptional } from '@nestjs/swagger';
+import { Type } from 'class-transformer';
+import { IsIn, IsInt, IsOptional, Min } from 'class-validator';
+import { RunStatus } from '../scenario-run.entity';
+
+export class RunsQueryDto {
+  @ApiPropertyOptional({ example: 1, default: 1 })
+  @IsOptional()
+  @Type(() => Number)
+  @IsInt()
+  @Min(1)
+  page?: number = 1;
+
+  @ApiPropertyOptional({ example: 20, default: 20 })
+  @IsOptional()
+  @Type(() => Number)
+  @IsInt()
+  @Min(1)
+  limit?: number = 20;
+
+  @ApiPropertyOptional({
+    enum: ['pending', 'in_progress', 'pass', 'fail'],
+    description: 'Filter by run status',
+  })
+  @IsOptional()
+  @IsIn(['pending', 'in_progress', 'pass', 'fail'])
+  status?: RunStatus;
+}
diff --git a/src/scenario/scenario-run-step.entity.ts b/src/scenario/scenario-run-step.entity.ts
index de11fc1..e465777 100644
--- a/src/scenario/scenario-run-step.entity.ts
+++ b/src/scenario/scenario-run-step.entity.ts
@@ -10,7 +10,7 @@ import {
 import { ScenarioRunEntity } from './scenario-run.entity';
 import { ScenarioStepEntity } from './scenario-step.entity';
 
-export type RunStepStatus = 'waiting' | 'pending' | 'in_progress' | 'pass' | 'fail';
+export type RunStepStatus = 'waiting' | 'pending' | 'in_progress' | 'pass' | 'fail' | 'cancelled';
 
 @Entity('scenario_run_steps')
 export class ScenarioRunStepEntity {
diff --git a/src/scenario/scenario-scheduler.service.ts b/src/scenario/scenario-scheduler.service.ts
new file mode 100644
index 0000000..05bd7d3
--- /dev/null
+++ b/src/scenario/scenario-scheduler.service.ts
@@ -0,0 +1,238 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { Interval } from '@nestjs/schedule';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import { chromium } from 'playwright';
+import { ScenarioRunEntity } from './scenario-run.entity';
+import { ScenarioRunStepEntity } from './scenario-run-step.entity';
+import { ScenarioStepEntity } from './scenario-step.entity';
+import { AuthService } from '../auth/auth.service';
+import { CodeExecutorService } from '../code-executor/code-executor.service';
+import { SessionService } from '../session/session.service';
+
+interface ValidateResult {
+  success: boolean;
+  description?: string;
+}
+
+@Injectable()
+export class ScenarioSchedulerService {
+  private readonly logger = new Logger(ScenarioSchedulerService.name);
+  private isProcessingStep = false;
+
+  constructor(
+    @InjectRepository(ScenarioRunEntity)
+    private readonly runRepo: Repository<ScenarioRunEntity>,
+    @InjectRepository(ScenarioRunStepEntity)
+    private readonly runStepRepo: Repository<ScenarioRunStepEntity>,
+    private readonly authService: AuthService,
+    private readonly codeExecutor: CodeExecutorService,
+    private readonly sessionService: SessionService,
+  ) {}
+
+  // ── Job 1: flip pending runs → in_progress ─────────────────────────────────
+
+  @Interval(1000)
+  async activatePendingRuns(): Promise<void> {
+    const pending = await this.runRepo.find({ where: { status: 'pending' } });
+    if (pending.length === 0) return;
+
+    for (const run of pending) {
+      run.status = 'in_progress';
+      await this.runRepo.save(run);
+      this.logger.log(`Run #${run.id} → in_progress`);
+    }
+  }
+
+  // ── Job 2: process one pending step run per tick ───────────────────────────
+
+  @Interval(1000)
+  async processPendingStepRuns(): Promise<void> {
+    if (this.isProcessingStep) return;
+    this.isProcessingStep = true;
+    try {
+      await this.processNextPendingStep();
+    } finally {
+      this.isProcessingStep = false;
+    }
+  }
+
+  private async processNextPendingStep(): Promise<void> {
+    const stepRun = await this.runStepRepo.findOne({
+      where: { status: 'pending' },
+      relations: ['scenarioStep'],
+      order: { order: 'ASC' },
+    });
+    if (!stepRun) return;
+
+    const step = stepRun.scenarioStep as ScenarioStepEntity;
+
+    // Mark in_progress
+    stepRun.status = 'in_progress';
+    await this.runStepRepo.save(stepRun);
+    this.logger.log(`StepRun #${stepRun.id} (run #${stepRun.runId}, step #${step.id} order=${step.order}) → in_progress`);
+
+    try {
+      if (step.type === 'login') {
+        await this.executeLoginStep(stepRun, step);
+      } else {
+        await this.executeExecStep(stepRun, step);
+      }
+    } catch (err) {
+      const msg = (err as Error).message ?? String(err);
+      this.logger.error(`StepRun #${stepRun.id} threw: ${msg}`);
+      await this.failStepRun(stepRun, msg);
+    }
+  }
+
+  // ── Login step ─────────────────────────────────────────────────────────────
+
+  private async executeLoginStep(stepRun: ScenarioRunStepEntity, step: ScenarioStepEntity): Promise<void> {
+    // execCode must be a JSON object: { "keyId": "...", "environmentName": "..." }
+    let params: { keyId: string; environmentName: string };
+    try {
+      params = JSON.parse(step.execCode ?? '{}');
+    } catch {
+      throw new Error('login step execCode must be valid JSON with keyId and environmentName');
+    }
+    if (!params.keyId || !params.environmentName) {
+      throw new Error('login step execCode must include keyId and environmentName');
+    }
+
+    const loginResult = await this.authService.login(params.keyId, params.environmentName, step.sessionName);
+    this.logger.log(`StepRun #${stepRun.id}: login OK, session=${loginResult.sessionName}`);
+
+    // Optional validation
+    if (step.validateCode) {
+      const validateResult = await this.runValidateCode(step.sessionName, step.validateCode);
+      if (!validateResult.success) {
+        throw new Error(validateResult.description ?? 'Validation failed');
+      }
+    }
+
+    await this.passStepRun(stepRun, null);
+  }
+
+  // ── Exec step ──────────────────────────────────────────────────────────────
+
+  private async executeExecStep(stepRun: ScenarioRunStepEntity, step: ScenarioStepEntity): Promise<void> {
+    if (!step.execCode) {
+      throw new Error('exec step has no execCode');
+    }
+
+    this.codeExecutor.validate(step.execCode);
+    await this.runExecCode(step.sessionName, step.execCode);
+    this.logger.log(`StepRun #${stepRun.id}: exec OK`);
+
+    // Optional validation
+    if (step.validateCode) {
+      const validateResult = await this.runValidateCode(step.sessionName, step.validateCode);
+      if (!validateResult.success) {
+        throw new Error(validateResult.description ?? 'Validation failed');
+      }
+    }
+
+    await this.passStepRun(stepRun, null);
+  }
+
+  // ── Browser helpers ────────────────────────────────────────────────────────
+
+  private async runExecCode(sessionName: string, code: string): Promise<unknown> {
+    const session = await this.sessionService.findBySessionName(sessionName);
+    if (!session) throw new Error(`Session not found: ${sessionName}`);
+
+    const cookies: unknown[] = JSON.parse(session.cookies);
+    const localStorageData: Record<string, string> = JSON.parse(session.localStorage);
+
+    const browser = await chromium.launch({ headless: true });
+    try {
+      const context = await browser.newContext();
+      await context.addCookies(cookies as Parameters<typeof context.addCookies>[0]);
+      const page = await context.newPage();
+      await context.addInitScript((entries: Record<string, string>) => {
+        for (const [k, v] of Object.entries(entries)) window.localStorage.setItem(k, v);
+      }, localStorageData);
+      const { result } = await this.codeExecutor.execute(page, context, code);
+      return result;
+    } finally {
+      await browser.close();
+    }
+  }
+
+  private async runValidateCode(sessionName: string, validateCode: string): Promise<ValidateResult> {
+    let raw: unknown;
+    try {
+      raw = await this.runExecCode(sessionName, validateCode);
+    } catch (err) {
+      return { success: false, description: (err as Error).message };
+    }
+
+    if (typeof raw === 'boolean') return { success: raw };
+    if (raw && typeof raw === 'object') {
+      const r = raw as Record<string, unknown>;
+      return {
+        success: Boolean(r['success']),
+        description: r['description'] != null ? String(r['description']) : undefined,
+      };
+    }
+    // Anything truthy = pass
+    return { success: Boolean(raw) };
+  }
+
+  // ── Pass / fail helpers ────────────────────────────────────────────────────
+
+  private async passStepRun(stepRun: ScenarioRunStepEntity, description: string | null): Promise<void> {
+    stepRun.status = 'pass';
+    stepRun.description = description;
+    await this.runStepRepo.save(stepRun);
+    this.logger.log(`StepRun #${stepRun.id} → pass`);
+
+    // Find the next waiting step in this run (next by order)
+    const nextStep = await this.runStepRepo.findOne({
+      where: { runId: stepRun.runId, status: 'waiting' },
+      order: { order: 'ASC' },
+    });
+
+    if (nextStep) {
+      nextStep.status = 'pending';
+      await this.runStepRepo.save(nextStep);
+      this.logger.log(`StepRun #${nextStep.id} → pending (next in sequence)`);
+    } else {
+      // No more waiting steps — check if any are still in_progress/pending (shouldn't be, but guard anyway)
+      const remaining = await this.runStepRepo.count({
+        where: [
+          { runId: stepRun.runId, status: 'pending' },
+          { runId: stepRun.runId, status: 'in_progress' },
+          { runId: stepRun.runId, status: 'waiting' },
+        ],
+      });
+      if (remaining === 0) {
+        await this.runRepo.update(stepRun.runId, { status: 'pass' });
+        this.logger.log(`Run #${stepRun.runId} → pass (all steps passed)`);
+      }
+    }
+  }
+
+  private async failStepRun(stepRun: ScenarioRunStepEntity, description: string): Promise<void> {
+    stepRun.status = 'fail';
+    stepRun.description = description;
+    await this.runStepRepo.save(stepRun);
+    this.logger.log(`StepRun #${stepRun.id} → fail: ${description}`);
+
+    // Cancel all remaining waiting/pending step runs in this run
+    await this.runStepRepo
+      .createQueryBuilder()
+      .update()
+      .set({ status: 'cancelled' })
+      .where('runId = :runId AND status IN (:...statuses)', {
+        runId: stepRun.runId,
+        statuses: ['waiting', 'pending'],
+      })
+      .execute();
+
+    this.logger.log(`Run #${stepRun.runId}: remaining steps cancelled`);
+
+    await this.runRepo.update(stepRun.runId, { status: 'fail' });
+    this.logger.log(`Run #${stepRun.runId} → fail`);
+  }
+}
diff --git a/src/scenario/scenario.controller.ts b/src/scenario/scenario.controller.ts
index b7402b5..b24ba8f 100644
--- a/src/scenario/scenario.controller.ts
+++ b/src/scenario/scenario.controller.ts
@@ -17,6 +17,7 @@ import { UpdateScenarioDto } from './dto/update-scenario.dto';
 import { CreateScenarioStepDto } from './dto/create-scenario-step.dto';
 import { UpdateScenarioStepDto } from './dto/update-scenario-step.dto';
 import { PaginationQueryDto } from './dto/pagination-query.dto';
+import { RunsQueryDto } from './dto/runs-query.dto';
 
 @ApiTags('scenarios')
 @Controller('scenarios')
@@ -114,6 +115,17 @@ export class ScenarioController {
 
   // ── Runs ──────────────────────────────────────────────────────────────────
 
+  @Get(':id/runs')
+  @ApiOperation({ summary: 'List runs for a scenario (paginated, filterable by status)' })
+  @ApiResponse({ status: 200 })
+  @ApiResponse({ status: 404, description: 'Scenario not found' })
+  findRuns(
+    @Param('id', ParseIntPipe) id: number,
+    @Query() query: RunsQueryDto,
+  ) {
+    return this.scenarioService.findRuns(id, query);
+  }
+
   @Post(':id/run')
   @ApiOperation({ summary: 'Create a new run for a scenario' })
   @ApiResponse({ status: 201, description: 'Run created with step runs' })
diff --git a/src/scenario/scenario.module.ts b/src/scenario/scenario.module.ts
index 1479816..fa8240d 100644
--- a/src/scenario/scenario.module.ts
+++ b/src/scenario/scenario.module.ts
@@ -6,11 +6,20 @@ import { ScenarioRunEntity } from './scenario-run.entity';
 import { ScenarioRunStepEntity } from './scenario-run-step.entity';
 import { ScenarioService } from './scenario.service';
 import { ScenarioController } from './scenario.controller';
+import { ScenarioSchedulerService } from './scenario-scheduler.service';
+import { AuthModule } from '../auth/auth.module';
+import { CodeExecutorModule } from '../code-executor/code-executor.module';
+import { SessionModule } from '../session/session.module';
 
 @Module({
-  imports: [TypeOrmModule.forFeature([ScenarioEntity, ScenarioStepEntity, ScenarioRunEntity, ScenarioRunStepEntity])],
+  imports: [
+    TypeOrmModule.forFeature([ScenarioEntity, ScenarioStepEntity, ScenarioRunEntity, ScenarioRunStepEntity]),
+    AuthModule,
+    CodeExecutorModule,
+    SessionModule,
+  ],
   controllers: [ScenarioController],
-  providers: [ScenarioService],
+  providers: [ScenarioService, ScenarioSchedulerService],
   exports: [ScenarioService],
 })
 export class ScenarioModule {}
diff --git a/src/scenario/scenario.service.ts b/src/scenario/scenario.service.ts
index a0889dc..404fd51 100644
--- a/src/scenario/scenario.service.ts
+++ b/src/scenario/scenario.service.ts
@@ -10,6 +10,7 @@ import { UpdateScenarioDto } from './dto/update-scenario.dto';
 import { CreateScenarioStepDto } from './dto/create-scenario-step.dto';
 import { UpdateScenarioStepDto } from './dto/update-scenario-step.dto';
 import { PaginationQueryDto } from './dto/pagination-query.dto';
+import { RunsQueryDto } from './dto/runs-query.dto';
 
 export interface PaginatedResult<T> {
   data: T[];
@@ -100,7 +101,21 @@ export class ScenarioService {
     await this.stepRepo.delete(stepId);
   }
 
-  // ── Runs ──────────────────────────────────────────────────────────────────
+  async findRuns(scenarioId: number, query: RunsQueryDto): Promise<PaginatedResult<ScenarioRunEntity>> {
+    await this.findOne(scenarioId); // 404 guard
+    const page = query.page ?? 1;
+    const limit = query.limit ?? 20;
+    const where: Record<string, unknown> = { scenarioId };
+    if (query.status) where['status'] = query.status;
+    const [data, total] = await this.runRepo.findAndCount({
+      where,
+      relations: ['stepRuns'],
+      order: { id: 'DESC', stepRuns: { order: 'ASC' } },
+      skip: (page - 1) * limit,
+      take: limit,
+    });
+    return { data, total, page, limit };
+  }
 
   async createRun(scenarioId: number): Promise<ScenarioRunEntity> {
     const scenario = await this.findOne(scenarioId);