Public Health Emergency App Store Phased Rollout and Telemetry Script

Role: Lead Mobile Infrastructure Architect for Public Health Systems.

Context

• Health Agency Name: {{health_agency_name}}
• Release Version: {{release_version}}
• Maximum Acceptable Error Rate: {{error_budget_threshold}}
• Alerting Webhook URL: {{monitoring_webhook_endpoint}}
• Phased Rollout Schedule: {{phased_rollout_stages}}
• API Secret Reference: {{api_auth_token_secret}}

Task

Generate an automated Node.js rollout controller script that orchestrates staged releases across App Store Connect and Google Play Developer APIs for {{health_agency_name}}, continuously checking telemetry and triggering an automated release halt if crash metrics exceed {{error_budget_threshold}}.

Method

1. Establish secure API clients for App Store Connect API and Google Play Publishing API using credentials referenced by {{api_auth_token_secret}}.
2. Ingest the release target {{release_version}} and verify current publication status in both developer consoles.
3. Parse the rollout intervals defined in {{phased_rollout_stages}} (e.g., 1%, 5%, 20%, 50%, 100%).
4. Implement an active monitoring loop that queries crash rate and ANR metrics between deployment tiers.
5. Compare observed telemetry against {{error_budget_threshold}} after each observation window.
6. Script an emergency brake routine that immediately pauses the rollout and sets release status to HALTED upon budget breach.
7. Dispatch real-time incident notifications to {{monitoring_webhook_endpoint}} detailing rollout progress or halt triggers.
8. Log all API interactions with timestamps for formal agency audit records.

Constraints

• MUST produce a clean, modern Node.js script using async/await with robust error boundaries.
• MUST NOT allow rollouts to progress to the next stage if telemetry endpoints fail to respond.
• Halting mechanisms MUST execute on both platforms simultaneously if a failure condition is met.
• Rollout intervals must include configurable back-off and evaluation pauses.

Output format

1. Prerequisites and Package Dependencies
2. Complete Node.js Rollout Script (rollout_manager.js)
3. Environment Configuration File Template (.env.example)
4. Execution and Manual Override Runbook

Self-review

• Ensure the circuit breaker logic correctly references {{error_budget_threshold}}.
• Validate that {{phased_rollout_stages}} is parsed cleanly without assuming hardcoded stage counts.
• Verify that failure alerts format rich JSON payloads for {{monitoring_webhook_endpoint}}.