fix(ralph-wiggum): handle empty PROMPT_PARTS array with set -u #131
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When invoking /ralph-loop without arguments, the script crashes with "PROMPT_PARTS[*]: unbound variable" instead of showing the helpful "No prompt provided" error message. The fix uses the :- operator to provide a default empty string when the array is empty, allowing the subsequent validation to handle it gracefully. Fixes anthropics#130
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Summary
/ralph-loopwithout argumentsProblem
When running
/ralph-loopwith no prompt, the script crashes with:This happens because
set -euo pipefail(line 6) treats empty array expansion as unbound.Solution
Changed line 113 from:
PROMPT="${PROMPT_PARTS[*]}"To:
PROMPT="${PROMPT_PARTS[*]:-}"The
:-operator provides a default empty string, allowing the existing validation (lines 116-128) to handle the empty case and show the helpful usage message.Test plan
/ralph-loopwithout arguments - should show "No prompt provided" error with examples/ralph-loop Hello world- should work as beforeFixes #130