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Manage infrastructure with version-controlled, reviewed, and tested IaC
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| name | infrastructure-as-code |
| description | Manage infrastructure with version-controlled, reviewed, and tested IaC |
| difficulty | senior |
| domains | ["infrastructure"] |
Infrastructure defined by hand is infrastructure that drifts, that can't be reviewed, and that can't be reproduced. This skill enforces that all infrastructure is version-controlled code with the same discipline as application code: specs, reviews, tests, and staged deployment.
Write the IaC code that represents the desired state before applying it. Terraform plan / Pulumi preview / CloudFormation change set must be reviewed before apply.
The plan is the diff for infrastructure changes. Review it as carefully as a code diff:
Before applying:
High blast radius changes require explicit approval from a second engineer.
Run drift detection on a schedule. If the actual state diverges from the IaC state, investigate and resolve — don't let drift accumulate.
Apply to: development → staging → production. Wait for validation at each stage before proceeding.
"It's a small change — I'll do it in the console" Console changes become invisible drift. IaC is the only source of truth. No exceptions.
"We don't need to test infrastructure" Untested IaC fails at the worst moment: during an incident when you need to provision fast.
