terraform-standards

A set of rules for writing and checking Terraform files, which describe cloud infrastructure in code, for the CBA foundation. It covers reusable modules, naming, event-stream settings, dependencies, tags, secrets, disaster recovery, and monitoring.

In plain words
What is it for?
Use it when changing files under infra/ or platform infrastructure, especially for regional resources, Event Hubs, dependencies, tags, secrets, disaster recovery, and Datadog monitoring.
Why use it?
It keeps infrastructure changes consistent and prevents the agent from applying changes directly or editing production variable files. Human review remains required for plans and applies.

Cursor rule for Cursor

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add rules/pallerana/agentic-loop-engineering-kit/terraform-standards
Clone the repo
git clone --depth 1 https://github.com/pallerana/agentic-loop-engineering-kit

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 398 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00398
Opus 5 $0.00000 $0.00199
Sonnet 5 $0.00000 $0.00080
Haiku 4.5 $0.00000 $0.00040

Measured 2d ago against content hash b83c5785faeb, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

terraform-standards scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.cursor/rules/terraform-standards.mdc · 40 lines

What it actually says

CBA Terraform standards

Applies to infra// and platform infrastructure Terraform. Agent loop never runs terraform apply.

Patterns (from infra/)

  • Modules: prefer existing modules under automation/terraform/ over inline resources.
  • Naming: azurerm_* resources use consistent primary / secondary pairing when var.secondary_region is set.
  • Event Hub: consumer groups named explicitly (e.g. my-service-central on my-service-status hub).
  • depends_on: explicit when module outputs are required before child resources.
  • Tags: follow workspace tagging conventions in parent module variables.

Agent loop constraints

Action Allowed in loop
terraform fmt / validate Yes (read-only validation)
terraform plan Yes with human review of output
terraform apply No — human gate only
Edit prod *.tfvars No — denylist hook

Review checklist

  • No secrets in .tf files (use Key Vault / variable refs)
  • DR pattern respected when secondary_region non-empty
  • knowledge-graph path from resource → consuming Java service documented in wiki if new
  • DDog monitors updated in DDog_1000896_iac_live when observability surface changes
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 40 lines · 0 tokens per session scan A b83c5785faeb

Subscribe to this mod's changes

terraform-standards is a cursor rule published in the GitHub repository pallerana/agentic-loop-engineering-kit (4 stars, last pushed 2mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 398 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Related

Other cursor rules, from other repositories