feat: confluence benchmark, pattern extractor, agent KB, UX spec

- extract-patterns.js: mines layered arch, ArgoCD appsets, cloud regions,
  CIDR allocations, naming conventions, sync waves, tech stack from code
- agent-kb.js: token-efficient JSON rendering of same doc tree
- eval-confluence-ref-questions.json: 32 reference-only benchmark questions
- wiggum-v2.sh: Ralph Wiggum loop targeting confluence baseline (77.8%)
- docs/human-ux-spec.md: BMad UX designer spec for human doc structure
- Eval results: V2 at 28.7% vs confluence 77.8% baseline
- Hub/spoke ownership now correctly extracted (95% on that question)
- Naming conventions, regions, CIDRs surfaced in system-architecture.md

foxtrot-docs-v3/reference/terraform/control-core-gcp-cluster-infra.md

@@ -0,0 +1,40 @@
+# Terraform: control-core/gcp/cluster-infra
+
+## Requirements
+
+| Name | Version |
+|------|---------|
+| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.9.0 |
+| <a name="requirement_google"></a> [google](#requirement\_google) | < 7.0.0 |
+| <a name="requirement_helm"></a> [helm](#requirement\_helm) | 2.15.0 |
+| <a name="requirement_kubernetes"></a> [kubernetes](#requirement\_kubernetes) | ~> 2.35 |
+| <a name="requirement_null"></a> [null](#requirement\_null) | >= 2.0 |
+| <a name="requirement_tls"></a> [tls](#requirement\_tls) | >= 3.1.0 |
+
+## Providers
+
+| Name | Version |
+|------|---------|
+| <a name="provider_google"></a> [google](#provider\_google) | 6.21.0 |
+
+## Modules
+
+| Name | Source | Version |
+|------|--------|---------|
+| <a name="module_gke"></a> [gke](#module\_gke) | terraform-google-modules/kubernetes-engine/google | ~> 33.0.4 |
+| <a name="module_network"></a> [network](#module\_network) | terraform-google-modules/network/google | <= 9.2.0 |
+| <a name="module_workload_identity"></a> [workload\_identity](#module\_workload\_identity) | terraform-google-modules/kubernetes-engine/google//modules/workload-identity | ~> 33.0.4 |
+
+## Resources
+
+| Name | Type |
+|------|------|
+| [google_client_config.provider](https://registry.terraform.io/providers/hashicorp/google/latest/docs/data-sources/client_config) | data source |
+
+## Inputs
+
+No inputs.
+
+## Outputs
+
+No outputs.