Terraform

HashiCorp’s releases page is the canonical changelog for Terraform core. Provider-version mismatches and state-format changes surface here first, before they propagate through the ecosystem: a Terraform patch may stabilise a planning behaviour that a downstream provider release has already started depending on, and the releases page is where that dependency becomes legible.

State-format compatibility is the fault line worth watching. The 0.12 cycle brought HCL2 and a state-format break that required explicit migration; the 0.13-through-1.0 run settled on a format that has since held, but the lock file introduced in 0.14 means provider-pin mismatches now produce explicit errors rather than silent drift. When something breaks after terraform init, checking the releases page for both Terraform core and the relevant provider together is the diagnostic that resolves most of it.