RED at Terraform init + apply in 12 s. No droplets provisioned, $0 spent.
Non-technical end users
Think of the VPC CIDR as the street address for a private neighbourhood we're about to build. Someone wrote "123 Maple Street, suite 260" when the building only has suites 0 through 255 — the mail courier just returned the envelope. Zero houses were built, zero money was spent. The typo was obvious as soon as we looked.
C-level decision makers
Controlled failure with zero cloud spend. Fail-fast design worked exactly as intended: an invalid input killed the campaign before any infrastructure was created. No cleanup debt, no orphan resources. The iteration cost is bounded by how fast the fix lands (minutes), not by what was provisioned (nothing).
Engineers & architects
terraform/main.tf:90 had ip_range "10.260.0.0/24" — invalid IPv4 because the second octet caps at 255. DO's VPC API rejected it at plan time. One-character-class fix: replaced with 10.251.0.0/24 (adjacent to ship-gate's 10.250.0.0/24). The next iteration exposed a second, latent bug in the firewall rules that referenced the same stale CIDR literally — proving the value of fail-fast staged discovery over trying to audit the whole file manually.
Redispatch as r3 after CIDR fix + add XAI_API_KEY plumbing to workflow env + setup_node.sh.