Digital product launch sequence

import { OpenFeature } from '@openfeature/server-sdk';

export interface LaunchPhase {
  id: string;
  name: string;
  timeoutMs: number;
  execute: () => Promise<void>;
  validate: () => Promise<boolean>;
  rollback: () => Promise<void>;
  rollbackOnFailure: boolean;
}

export interface LaunchConfig {
  environment: string;
  phases: LaunchPhase[];
  rollbackThreshold: {
    errorRate: number;
    latencyP99: number;
    healthCheckFailures: number;
  };
}

export class LaunchOrchestrator {
  private currentState: 'IDLE' | 'RUNNING' | 'ROLLED_BACK' | 'COMPLETED' = 'IDLE';
  private currentPhaseIndex = 0;

  constructor(private config: LaunchConfig) {}

  async execute(): Promise<void> {
    if (this.currentState !== 'IDLE') {
      throw new Error('Launch already in progress or completed.');
    }

    this.currentState = 'RUNNING';

    try {
      for (let i = 0; i < this.config.phases.length; i++) {
        this.currentPhaseIndex = i;
        const phase = this.config.phases[i];

        console.log(`[LAUNCH] Validating phase: ${phase.name}`);
        const isValid = await this.runWithTimeout(
          phase.validate(),
          phase.timeoutMs
        );

        if (!isValid) {
          throw new Error(`Validation failed for phase: ${phase.name}`);
        }

        console.log(`[LAUNCH] Executing phase: ${phase.name}`);
        await this.runWithTimeout(phase.execute(), phase.timeoutMs);

        console.log(`[LAUNCH] Phase verified: ${phase.name}`);
      }

      this.currentState = 'COMPLETED';
      console.log('[LAUNCH] Sequence completed successfully.');
    } catch (error) {
      console.error('[LAUNCH] Sequence failed:', error);
      if (this.config.phases[this.currentPhaseIndex]?.rollbackOnFailure) {
        await this.rollback();
      }
      throw error;
    }
  }

  private async rollback(): Promise<void> {
    this.currentState = 'RO

LLED_BACK'; console.log('[LAUNCH] Initiating rollback...');

for (let i = this.currentPhaseIndex; i >= 0; i--) {
  const phase = this.config.phases[i];
  try {
    await phase.rollback();
    console.log(`[ROLLBACK] Reverted phase: ${phase.name}`);
  } catch (err) {
    console.error(`[ROLLBACK] Failed to revert ${phase.name}:`, err);
  }
}

}

private runWithTimeout<T>(promise: Promise<T>, ms: number): Promise<T> { return Promise.race([ promise, new Promise<never>((_, reject) => setTimeout(() => reject(new Error('Phase timeout')), ms) ) ]); } }

### Phase Configuration Example

```typescript
const launchConfig: LaunchConfig = {
  environment: 'production',
  rollbackThreshold: { errorRate: 0.02, latencyP99: 800, healthCheckFailures: 3 },
  phases: [
    {
      id: 'migration',
      name: 'Database Schema Migration',
      timeoutMs: 30000,
      execute: async () => { /* run forward-compatible migration */ },
      validate: async () => { /* verify schema version & backward compatibility */ },
      rollback: async () => { /* run down migration or restore snapshot */ },
      rollbackOnFailure: true
    },
    {
      id: 'deploy',
      name: 'Artifact Deployment',
      timeoutMs: 60000,
      execute: async () => { /* push containers/static assets */ },
      validate: async () => { /* verify image digest & checksums */ },
      rollback: async () => { /* revert to previous image tag */ },
      rollbackOnFailure: true
    },
    {
      id: 'health',
      name: 'Health Verification',
      timeoutMs: 45000,
      execute: async () => { /* trigger synthetic transactions */ },
      validate: async () => { /* check 2xx responses & latency < threshold */ },
      rollback: async () => { /* disable traffic routing */ },
      rollbackOnFailure: true
    },
    {
      id: 'traffic',
      name: 'Traffic Shift & Feature Activation',
      timeoutMs: 120000,
      execute: async () => {
        await OpenFeature.setProvider(new CustomProvider());
        // progressive traffic shift (1% → 10% → 100%)
      },
      validate: async () => { /* verify flag evaluation & routing rules */ },
      rollback: async () => { /* deactivate flags, revert traffic to 0% */ },
      rollbackOnFailure: true
    }
  ]
};

The orchestrator enforces sequential execution, validates each phase before proceeding, and automatically reverts on failure. Timeouts prevent hanging states. Rollback proceeds in reverse order to respect dependency chains.

Pitfall Guide

1. Treating Deployment as Launch Deploying artifacts does not validate runtime behavior. Without health checks, traffic shifting, and flag activation, teams expose unverified code to production. Mitigation: Decouple deployment from activation. Use the orchestrator to gate traffic until synthetic and real-user metrics pass thresholds.

2. Ignoring Database Migration Sequencing Forward-only migrations break backward compatibility during rolling updates. Teams often deploy code before migrations or vice versa, causing schema mismatches. Mitigation: Enforce contract testing. Migrations must be backward-compatible, deployed independently, and verified before code activation.

3. Hardcoding Gate Thresholds Static error rate or latency thresholds ignore traffic patterns, seasonal spikes, and service tiering. A 5% error rate may be acceptable for internal tools but catastrophic for payment APIs. Mitigation: Parameterize thresholds per service tier. Load thresholds from configuration management, not code.

4. Feature Flag Sprawl & Lifecycle Debt Flags accumulate without cleanup. Orphaned flags increase code complexity, degrade performance, and create security blind spots. Mitigation: Enforce flag TTLs. Integrate flag lifecycle into the launch sequence. Require cleanup PRs before GA promotion.

5. Manual Approval Bottlenecks Human gates break automation, introduce latency, and create single points of failure. Approvals are often rubber-stamped, adding friction without risk reduction. Mitigation: Replace manual gates with automated validation. Use policy-as-code (OPA/Conftest) to enforce compliance checks. Reserve manual intervention for exception handling only.

6. Missing Rollback Triggers Teams assume rollback is manual. When incidents escalate, decision fatigue delays recovery. Mitigation: Implement automated circuit breakers tied to observability metrics. Configure the orchestrator to trigger rollback on threshold breach without human input.

7. Skipping Post-Launch Observability Validation Launches often end at traffic shift. Missing post-launch metric validation means teams miss delayed failures, cache warming issues, or third-party integration drift. Mitigation: Add a POST_LAUNCH phase that validates SLOs, logs, traces, and dependent service health over a 15-30 minute window.

Production Bundle

Action Checklist

• Define launch phases: Map each digital asset (API, UI, DB, flags) to a sequenced phase with explicit entry/exit conditions.
• Implement gate validators: Add synchronous checks for health, compatibility, and routing before phase execution.
• Configure rollback thresholds: Set error rate, latency, and health check limits per service tier.
• Integrate OpenFeature: Standardize flag evaluation across environments and enforce TTL-based cleanup.
• Automate rollback sequencing: Ensure reverse-order reversion with idempotent operations and timeout guards.
• Add post-launch validation: Schedule metric verification over a 15-30 minute window to catch delayed failures.
• Audit flag lifecycle: Require cleanup PRs and archive orphaned flags quarterly.

Decision Matrix

Scenario	Recommended Approach	Why	Cost Impact
Mission-critical payment API	Canary rollout with 1% → 10% → 100% traffic shift + automated rollback	Minimizes blast radius; financial systems require strict failure containment	High infra cost, low incident cost
Internal admin dashboard	Blue-green deployment with immediate traffic switch	Low user impact; speed outweighs progressive delivery overhead	Low infra cost, moderate incident cost
Mobile app release	Staged rollout via app store + feature flag gating	App store review cycles require phased exposure; flags enable remote kill switches	Moderate infra cost, low incident cost
High-traffic web application	Progressive delivery with synthetic traffic validation + SLO monitoring	CDN caching and edge routing require warm-up; SLOs prevent SLA breaches	High infra cost, low incident cost
Database schema migration	Forward-compatible migration deployed separately, validated before code activation	Prevents schema mismatch during rolling updates; ensures zero-downtime compatibility	Low infra cost, high incident cost if skipped

Configuration Template

launch:
  environment: production
  rollback_threshold:
    error_rate: 0.02
    latency_p99_ms: 800
    health_check_failures: 3
  phases:
    - id: migration
      name: Database Schema Migration
      timeout_ms: 30000
      rollback_on_failure: true
      validators:
        - type: schema_compatibility
          config: { backward_compatible: true }
      actions:
        execute: "run_migration --direction up"
        rollback: "run_migration --direction down"

    - id: deploy
      name: Artifact Deployment
      timeout_ms: 60000
      rollback_on_failure: true
      validators:
        - type: image_digest
          config: { registry: "ecr", verify: true }
      actions:
        execute: "deploy --image ${IMAGE_TAG}"
        rollback: "deploy --image ${PREVIOUS_IMAGE_TAG}"

    - id: health
      name: Health Verification
      timeout_ms: 45000
      rollback_on_failure: true
      validators:
        - type: http_status
          config: { endpoint: "/health", expected: 200, retries: 3 }
      actions:
        execute: "run_synthetic_tests"
        rollback: "disable_traffic"

    - id: traffic
      name: Traffic Shift & Feature Activation
      timeout_ms: 120000
      rollback_on_failure: true
      validators:
        - type: feature_flag_evaluation
          config: { provider: "openfeature", flags: ["new_checkout"] }
      actions:
        execute: "shift_traffic --percent 100"
        rollback: "shift_traffic --percent 0"

Quick Start Guide

1. Install dependencies: npm install @openfeature/server-sdk ts-node
2. Save the configuration template as launch-config.yaml and update thresholds/endpoints for your environment.
3. Initialize the orchestrator: ts-node launch-orchestrator.ts --config launch-config.yaml
4. Monitor phase execution via structured logs. Verify rollback triggers by simulating a health check failure during the health phase.
5. Integrate with CI/CD: Add the orchestrator as a post-deployment step in your pipeline. Ensure artifact deployment completes before launch sequencing begins.