#!/usr/bin/env bash
set -euo pipefail
repo="${1:?path to the synthetic repo-fixture created by seed.sh}"
cp "$repo/math.ts" "$repo/other.ts"
cat > "$repo/notes.md" <<'MD'
# Arithmetic notes
Add covers positive and negative integers.

Subtraction has its own example.
MD
git -C "$repo" add other.ts notes.md
git -C "$repo" -c user.name='Evidence fixture' -c user.email='fixture@example.invalid' commit -qm 'Add optional synthetic file fixtures'