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CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

What This Is

A Go CLI tool (k8s) for managing Kubernetes contexts, namespaces, and GCP projects. It wraps kubectl and gcloud commands with an interactive numbered-menu interface.

Build & Run

go build -o bin/k8s k8s.go    # build binary
go run k8s.go -cc              # run directly

No tests exist yet. No linter is configured.

Architecture

Single-file Go CLI (k8s.go) — everything lives in package main. The binary is a thin interactive wrapper around kubectl and gcloud shell commands using os/exec.

Pattern: Most commands follow the same flow:

  1. Shell out to kubectl/gcloud to get a list (contexts, namespaces, projects)
  2. Parse output into a numbered map, render with tablewriter
  3. Prompt user for a number via bufio.Reader
  4. Shell out again to apply the selection

CLI flags: parsed manually via os.Args (no flag library). Flags: -cc, -cn, -cp, -dc, -lc, -ln, -lp, -rc, -t.

External dependencies: only github.com/olekukonko/tablewriter for table formatting.