Advanced AI Prompt for Feature Flag Guided Zero-Downtime Releases

Act as a Progressive Delivery Specialist. Draft a highly advanced GitHub Actions workflow that deeply integrates with a [FF_PROVIDER] (e.g., LaunchDarkly, Optimizely, Flagsmith) API. The pipeline must deploy the raw application code into the [TARGET_ENVIRONMENT] in a completely 'dark' state (the logic is physically deployed but hidden behind a boolean false feature flag). Once the physical deployment successfully completes and passes basic health checks, the workflow must execute a secure cURL/API request to the [FF_PROVIDER] utilizing the [PROJECT_KEY] to programmatically toggle the [FLAG_NAME] targeting exactly 10% of the user base. Implement a 15-minute wait state, followed by an API call to verify error rates; if stable, automatically execute another API call to roll the flag out to 100%.