{
  "slug": "arm-adds-deployment-stacks-what-if-commands-59c747bc1afb",
  "title": "ARM adds deployment stacks what-if commands",
  "tools": [
    "az"
  ],
  "tags": [
    "agent"
  ],
  "introduced_at": "2026-08-04T00:00:00.000Z",
  "announced_at": "2026-08-04T00:00:00.000Z",
  "effective_at": null,
  "date_basis": "source-publication",
  "status": "unknown",
  "how": {
    "incantation": "When previewing a deployment stack change, run `az stack-whatif <scope> create` at its resource group, subscription, or management group scope, supplying the stack ID and required scope settings. The command creates a deployment stack what-if result.",
    "examples": [
      "az stack-whatif group create --name <result-name> --resource-group <resource-group> --template-file <template-file> --deny-settings-mode none --action-on-unmanage deleteResources --ri P5D --stack-id <stack-resource-id>",
      "az stack-whatif sub create --name <result-name> --template-file <template-file> --location <location> --deny-settings-mode none --action-on-unmanage deleteResources --ri P5D --stack-id <stack-resource-id>",
      "az stack-whatif mg create --name <result-name> --template-file <template-file> --location <location> --management-group-id <management-group-id> --deny-settings-mode none --action-on-unmanage deleteResources --ri P5D --stack-id <stack-resource-id>"
    ],
    "gotchas": [
      "Version: 2.89.0",
      "--name (required): Name for the what-if result.",
      "--resource-group (required): Resource group scope for the result.",
      "--management-group-id (required): Management group scope for the result.",
      "--location (required): Location for the subscription- or management-group-scope result.",
      "--stack-id (required): Resource ID of the deployment stack being previewed.",
      "--action-on-unmanage / --aou (required): Action for resources removed from the stack: deleteAll, deleteResources, or detachAll.",
      "--deny-settings-mode / --dm (required): Deny settings mode: denyDelete, denyWriteAndDelete, or none.",
      "--retention-interval / --ri (required): Retention interval for the what-if result.",
      "--template-file: Path to the template file; create also accepts --template-spec or --template-uri.",
      "--parameters: Template parameters, including parameter files and key/value pairs.",
      "Prerequisite: Azure CLI 2.89.0 or later is required for `az stack-whatif`."
    ]
  },
  "why_it_matters": "Preview a deployment stack change before applying it.",
  "sources": [
    "https://learn.microsoft.com/en-us/cli/azure/release-notes-azure-cli#august-04-2026",
    "https://learn.microsoft.com/en-us/cli/azure/stack-whatif/group?view=azure-cli-latest",
    "https://learn.microsoft.com/en-us/cli/azure/stack-whatif/sub?view=azure-cli-latest",
    "https://learn.microsoft.com/en-us/cli/azure/stack-whatif/mg?view=azure-cli-latest",
    "https://github.com/Azure/arm-template-whatif"
  ],
  "rank": 0.94028,
  "judge": {
    "publish": true,
    "judge_model": "codex-cli/gpt-6-luna+typesafe/jev-1.13.0",
    "prompt_version": "extract-v7+enrich-v2+judge-v2x3+jev-publish-v1"
  },
  "review_state": "approved",
  "provenance": {
    "run_id": "wave2b-20261017",
    "verdict_id": "wave2b-20261017:wave2b-20261017-4b61078b537e02c6-8:gate",
    "evidence_hash": "69a82c42736c0abef9ac251e24bcb04119ed7ae807fd0043a370fee1b9f259a5"
  },
  "review": {
    "draft_hash": "ef5e4e68f62e2f5b2758bf29476263172fc47d0707c6d655b796eeb8a9f4f3f1",
    "reviewer": "publication-gate",
    "reviewed_at": "2026-10-07T00:00:00.000Z",
    "decision": "wave2b-20261017:gate",
    "reason": "3 of 3 judge runs approved with p_yes >= 0.9 (mean 0.94 >= 0.9; 2 needed) and Jev gave 0.72 (>= 0.6 needed)."
  }
}