Implement Feature with Interleaved Testing

Implement the current feature by following the spec, with interleaved testing after each user story.

User arguments: $ARGUMENTS

Instructions for Claude

You MUST follow these steps:

1. Get current feature number from branch:

   BRANCH=$(git rev-parse --abbrev-ref HEAD)
   NUM=$(echo "$BRANCH" | grep -oE 'alg-([0-9]+)' | grep -oE '[0-9]+')