{"version":"2.1.299","anchor":"bash-command-telemetry-flags-for-zshbash-divergence","canonical_anchor":"bash-command-telemetry-flags-for-zshbash-divergence","heading":"Claude Code now checks shell commands for zsh and bash differences","tier":"internal","area":"Elsewhere","scope":"individual","heads_up":false,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.299\/e\/bash-command-telemetry-flags-for-zshbash-divergence","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.299","markdown":"### Claude Code now checks shell commands for zsh and bash differences\n\nClaude Code now spots shell command patterns that behave differently in zsh than in bash and records them as usage data\n\n**What**\n\nClaude Code now analyses shell commands for patterns that act differently depending on whether they run in zsh or bash (two common command-line shells). It produces four yes\/no flags:\n\n- `zsh_nomatch_error`\n\n- `zsh_equals_error`\n\n- `bash_pipestatus_use`\n\n- `bash_word_split_use`\n\nA new remotely controlled switch also appears alongside this check.\n\n**Why**\n\nThis measures how often commands run into shell compatibility problems. It does not change how commands run.\n\n- Area: Elsewhere\n- Tier: Under the hood\n- Useful: 2\/5\n- Signal: 2\/5\n- Scope: individual\n- Heads-up: no"}