aws eks list-clusters - cluster name silently replaced with "date?" type placeholder

Bug

rtk aws eks list-clusters replaces the actual cluster name with date? instead of showing the real value.

Steps to reproduce

rtk aws eks list-clusters --region eu-central-1

Actual rtk output:

{
  clusters:
  [
    date?
  ]
}

Real AWS CLI output:

{"clusters": ["argocd-dev"]}

Expected rtk output: compact but preserving the actual cluster name(s), e.g. clusters: ["argocd-dev"]

Root cause (investigated)

Inspected the rtk binary via strings - found a type-inference sequence: float, string, date?, string[.

The JSON compaction logic infers types for array element values and replaces them with the inferred type label. The cluster name "argocd-dev" is being misclassified as date? (uncertain date), likely because the hyphen-separated lowercase pattern word-word matches the date heuristic regex.

The actual string value is then silently discarded and replaced with the type label - so the information is completely lost, not just compressed.

Impact

• Cluster names are silently lost - the LLM receives date? instead of the actual name
• Affects virtually all real-world cluster names since AWS naming conventions use hyphens
• Workaround: rtk proxy aws eks list-clusters returns correct raw output

Environment

• rtk version: 0.37.1 (Homebrew, macOS arm64)
• Confirmed reproducible via the hook and direct rtk aws eks list-clusters call