Task: Generate Feature Flags and Exclude Blocks

A team wants to add runtime feature control and production safety protections to their existing Terragrunt modules. Generate the following configurations:

Requirement 1: Feature Flag for Optional Monitoring

Add a feature flag enable_monitoring to a module at infrastructure/prod/app/terragrunt.hcl that:

• Defaults to false
• When enabled via CLI (--feature enable_monitoring=true), adds monitoring resources to the inputs
• The flag default must be a static value

The team lead suggested writing: default = local.env.locals.enable_monitoring — this is wrong. Generate the correct approach.

Requirement 2: Exclude Block for Production Safety

The production database module (infrastructure/prod/rds/terragrunt.hcl) should:

• Be excluded from destroy operations by default
• Still be included in plan and apply operations
• Complement prevent_destroy = true

Requirement 3: Replace a Legacy skip Attribute

An existing module has skip = true that should be updated to the modern exclude block syntax. The original intent was to skip all operations on this module.

Your Task

Generate the HCL snippets for:

1. The correct feature block with a static default (explain why the suggested local reference fails)
2. The exclude block for the prod/rds module
3. The modernised replacement for skip = true

Also show the CLI command and environment variable approaches to activate the feature flag at runtime.