nitinjain999/platform-skills/finops

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Cost visibility and tag governance for platform changes. Estimates the monthly cost of a Terraform pull request with Infracost, sets up in-cluster cost allocation by namespace and label with OpenCost, and enforces required cost tags in four layers (Terraform default_tags and variable validation, a Conftest gate on the plan, AWS Config REQUIRED_TAGS, and a Kyverno namespace-label policy). Use when asked "what will this cost", "add cost estimates to PRs", "who owns this spend", "enforce cost-center tags", or "set up OpenCost". Cost as one dimension of a full PR review → /platform-skills:pr-review.

Install

npx vskill@latest install nitinjain999/platform-skills/finops

SKILL.md

Make cost visible before a change merges, attributable after it runs, and impossible to leave untagged.

Read references/finops.md before responding. It holds the four-layer tag pattern and what each layer misses, the Infracost workflow and CLI, OpenCost configuration, and rollback. The working files are in examples/finops.

The required tag keys for this organisation are ${user_config.required_tag_keys}. If that reads as a literal placeholder or is empty, it is not configured: use owner, cost-center, environment and say so.

Mode dispatch

ModeWhat it does
estimateMonthly cost difference of a Terraform change with Infracost; the PR workflow from examples/finops/workflows/infracost.yml
allocateOpenCost via Flux, pointed at the user's Prometheus, with a per-cluster ID
tagsThe four-layer tag enforcement for the user's keys: provider default_tags and validation, the Conftest policy and its tests, the AWS Config rule, the Kyverno policy (Audit first)
auditFind untagged resources and unowned namespaces now: AWS Config compliance for REQUIRED_TAGS, namespaces missing cost labels, OpenCost's idle and unallocated cost

Rules

  • Keep the tag key list identical in every layer, and state it once at the top of the output.
  • Never suggest bypassing the CI gate for a single change; fix the tags or change the rule in Git.
  • Treat Infracost output as a direction: name the usage assumptions it could not know.

Output format

Every mode ends with:

  • Changes, as exact files and fields
  • Blast radius, in one line
  • Validation, as commands (opa test, conftest test, kubeconform, infracost diff)
  • Rollback

Security

  • Security scanPassed, 90 of 100Pattern checks on the skill's files.
  • Model reviewPassed

See the full security report

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