Script stops prematurely at iteration 34/38 and subsequent runs are extremely slow

[MarkMolina]

When running the PRD skill with a large number of user stories (38), the script encounters two issues:

Premature termination: The script stopped at iteration 34 and incorrectly reported completion, leaving 4 user stories unprocessed

Claude Code becomes unresponsive: After the premature stop, Claude Code is stuck/frozen when prompting anything in this repo

Extremely slow retry: Re-running the script correctly picks up at user story 35, but performance is severely degraded (30+ minutes and still processing only the 3rd remaining story). Also, after completing the 2nd, it didn't report back what it did and just started working the third user story.

It looks like all stories will be completed eventually though.

[NNTin]

Claude Ralph sometimes stop because Claude repeats the following instruction to remind itself to say it when it is done.

If ALL stories are complete and passing, reply with:
<promise>COMPLETE</promise>

I fixed this behavior in #93