A module version is a consumer agreement
Infrastructure modules can reduce repeated configuration while spreading an incompatible change to every consumer. Versioning needs to describe what users can rely on: inputs, outputs, provider assumptions, resource identity and an upgrade path. A release number alone does not explain those boundaries. This guide offers a planning method, not a claim about an XIVTech client implementation.
For an India team sharing infrastructure across squads, begin with one representative consumer rather than redesigning every environment at once. Name a module maintainer and a consumer owner. They have different responsibilities: the maintainer explains the supported interface, while the consumer decides whether a particular environment can accept the change.
Inventory the interface before editing it
List required and optional inputs, defaults, exposed outputs and supported runtime/provider combinations. Include assumptions that exist only in examples or personal knowledge. A default network setting can be as consequential as a renamed variable. Describe which behaviors are supported and which remain implementation details.
Review resource addresses and persistence requirements separately from the input contract. A module refactor can produce a destructive infrastructure plan even if the consumer's input file barely changes. A source-code revert is not a general data-recovery procedure.
Pin a retrievable source
HashiCorp's module configuration documentation distinguishes registry version constraints from Git source references. Registry modules can use the version argument; Git sources select a supported revision through the source reference. Confirm the behavior for the actual Terraform version and module source rather than assuming one syntax applies everywhere.
Record the exact source selected during an upgrade rehearsal. A moving branch reference may resolve differently later. Version constraints also express a range, not proof that every version in that range was tested by the consuming team. Retain the accepted source and the evidence required to reproduce the review.