Research Q4 infra spend anomaly
4 agents · 12 tool calls · elapsed 2m 14s
Our AWS bill spiked 34% this week in us-east-1. Break it down, find the root cause, and draft a remediation plan.
Researcherclaude-opus-4.712:42:08
Pulling cost explorer data. Fetching the weekly breakdown now.
fetch_aws_cost_explorer1.2s
{ "service": "ec2", "region": "us-east-1", "range": "7d" }
EC2 spend · us-east-1 · 7d
$1,420Mon
$1,260Tue
$1,340Wed
$1,512Thu
$2,308Fri
$2,870Sat
$3,498Sun
7d total
$14,208
Delta
+34%
Baseline
$10,600
Spike began Friday. 82% of the increase traces to c6g.8xlarge instances. Handing off to Coder to scan recent infra commits.
Coderclaude-opus-4.712:43:24
git_log_scan0.6s
{ "repo": "infra", "since": "5d", "path": "terraform/ec2/" }
terraform/ec2/workers.tfPR #842 · 3d ago
resource "aws_autoscaling_group" "workers" {- min_size = 2+ min_size = 12- max_size = 20+ max_size = 120instance_type = "c6g.8xlarge"}
Root cause identified. PR #842 bumped min_size from 2 to 12 for a load test that was never rolled back. Over-provisioned ~10x during off-peak.
Writerclaude-sonnet-4.612:44:51
Remediation plan below. Three steps, sequenced to avoid disrupting the scheduled Friday load test.
Remediation plan
- Revert
- Guardrail
- Alert
Reviewer agent is generating its response…
@Researcher⌘↵