bash-cli-refactoring

Refactor bash CLI tools systematically using BDD methodology. Covers helper extraction (debug-aware wrappers, interactive pickers, two-tier resolution), god function decomposition (orchestrator pattern, extraction by concern), bash-specific gotchas (set -e traps, local masking, ANSI-C quoting, pipefail), BDD testing for bash (pytest-bdd with subprocess runner, testing without external dependencies), standard command patterns (entry point architecture, two-path flow, argument parsing), and a 9-item anti-pattern catalog with detection signals and fix recipes. Synthesized from real refactoring of a 1500-line kubectl wrapper CLI. Trigger phrases: "refactor bash", "bash CLI", "shell script refactoring", "bash refactor", "refactor shell script", "bash best practices", "shell script quality", "bash anti-patterns", "bash god function", "bash helper extraction", "BDD bash", "test bash CLI", "bash cleanup", "bash set -e", "bash debugging", "refactoring CLI tool", "bash code quality", "shell script patterns", "bash cod