The Complete Production SOP: How to Deploy and Run tfsec Pre-Deployment Terraform Security Linter in Autonomous AI Agents

---
name: "tfsec-terraform-security-linter"
description: "Detect cloud infrastructure security flaws locally before provisioning resources."
metadata:
  author: "Aqua Security"
  version: "1.0.0"
  runtime_compatibility:
    - "codex"
    - "claude-code"
    - "cursor"
    - "windsurf"
triggers:
  - "run tfsec scan"
  - "fix terraform security alert tfsec"
  - "audit aws terraform tfsec"
permissions:
  fs_read: true
  fs_write: "workspace"
  shell_exec: false
  net_access: false
---

# tfsec Pre-Deployment Terraform Security Linter

Runs tfsec static analysis against Terraform code: evaluating resource blocks, references, and variables against cloud security benchmarks (AWS, Azure, GCP).

## Execution SOP & Rules
1. Execute `tfsec . --format json` in the root of the Terraform project before running `terraform plan`.
2. Review remediation advice provided in tfsec output and apply recommended attributes directly to HCL files.
3. Ensure sensitive variables declare `sensitive = true` to prevent cleartext logging.
4. Re-run scan to verify zero critical or high severity alerts exist.

---
minimum_severity: "MEDIUM"
severity_overrides:
  aws-s3-enable-bucket-logging: "LOW"
exclude:
  - "aws-vpc-no-public-ingress"

# Pre-remediation resource flagged by tfsec
resource "aws_s3_bucket" "data_lake" {
  bucket = "corp-telemetry-lake"
}

# Post-remediation expected from agent
resource "aws_s3_bucket" "data_lake" {
  bucket = "corp-telemetry-lake"
}

resource "aws_s3_bucket_server_side_encryption_configuration" "data_lake" {
  bucket = aws_s3_bucket.data_lake.id

  rule {
    apply_server_side_encryption_by_default {
      sse_algorithm = "aws:kms"
    }
  }
}

resource "aws_s3_bucket_public_access_block" "data_lake" {
  bucket                  = aws_s3_bucket.data_lake.id
  block_public_acls       = true
  block_public_policy     = true
  ignore_public_acls      = true
  restrict_public_buckets = true
}

#!/usr/bin/env bash
set -euo pipefail

echo "[1/3] Checking Terraform format..."
terraform fmt -check -diff

echo "[2/3] Validating configuration..."
terraform validate

echo "[3/3] Running tfsec static analysis..."
tfsec . --exclude-downloaded-modules --minimum-severity HIGH

echo "All security checks passed."