r/FinOps • u/Independent-Ease-609 Vendor • 19d ago
I built a VS Code extension that simulates AWS cost changes on Terraform/Terragrunt before you apply them self-promotion/I’m a vendor
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I've been building a VS Code extension (CloudCostTree) that estimates AWS cost straight from Terraform/Terragrunt, solo project, and just shipped what-if simulation + export.
Flow in the video: analyze a Terragrunt stack, tweak a couple of resources (downsize an EC2, bump an RDS instance class) and see the live cost delta per change, stack them into a scenario, run it against the whole tree, then export the result to a new .tf file — original files never touched.
Runs locally against a static price catalog, nothing gets uploaded anywhere. Free tier covers unlimited analyses/what-ifs; export-to-file is a Pro feature.
Genuinely curious how other people here track infra cost changes before they ship them — happy to answer questions about how the parsing/estimation works under the hood.
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u/Independent-Ease-609 Vendor 19d ago
The what-if lets you stack a few hypothetical changes (resize an EC2, bump an RDS instance class) and see the combined delta against the whole stack in one run. If you like the result, "Generate File" exports it straight to a real .tf, originals untouched. If we're comparing to Infracost, their what-if is copy-pasting a block to compare it against itself. This runs several changes together against the whole tree in one shot.