claude-code - 💡(How to fix) Fix "Unhandled node type: array" emitted during bash tool call display

1. Fall back to displaying the raw command text verbatim rather than emitting an error

TL;DR

The issue can be mitigated by modifying the bash command to avoid nested subshells with bash array expansions or by displaying the raw command text verbatim.

Guidance

• Verify that the rendering layer is the cause of the issue by checking if the command runs correctly despite the error message.
• Consider modifying the bash command to use a different approach, such as storing the array expansion in a variable before passing it to the tool call.
• Check if the Claude Code CLI has an option to display the raw command text verbatim instead of rendering it.
• Test if the issue is specific to the claude-opus-4-6 model or if it occurs with other models as well.

Example

# Store array expansion in a variable
LABELS_JSON=$(jq -n '$ARGS.positional' --args "${LABELS[@]}")
jq -n --argjson labels "$LABELS_JSON" '...'

Notes

The issue may be specific to the Claude Code CLI and its rendering layer, and the solution may depend on the specific version and model being used.

Recommendation

Apply workaround: Modify the bash command to avoid nested subshells with bash array expansions, as shown in the example above, to prevent the rendering layer from emitting an error message.