#!/bin/sh
# LLM backend that hands each prompt to whoever watches $MAILBOX:
# prompt-N.md goes out, the reply is read from reply-N.md. For driving
# the generator from an agent session, or by hand.
set -eu
: "${MAILBOX:?set MAILBOX to a directory}"
mkdir -p "$MAILBOX"
n=$(( $(ls "$MAILBOX" | grep -c '^prompt-' || true) + 1 ))
cat > "$MAILBOX/prompt-$n.md"
until [ -s "$MAILBOX/reply-$n.md" ]; do sleep 2; done
sleep 1
cat "$MAILBOX/reply-$n.md"