feat(switch): assemble loose nro + game.love dist

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/build_switch.sh

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+#!/usr/bin/env bash
+# Nintendo Switch packaging entry point.
+#
+# Usage:
+#   scripts/build_switch.sh --loose [path/to/game.love]
+#
+# Additional modes (fused NRO) are added in later tasks.
+
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+LOOSE=0
+GAME_LOVE=""
+
+while [ $# -gt 0 ]; do
+  case "$1" in
+    --loose) LOOSE=1; shift ;;
+    -h|--help)
+      sed -n '2,8p' "$0" | sed 's/^# \{0,1\}//'
+      exit 0
+      ;;
+    *)
+      if [ -z "$GAME_LOVE" ]; then
+        GAME_LOVE="$1"
+      else
+        echo "unknown argument: $1" >&2
+        exit 2
+      fi
+      shift
+      ;;
+  esac
+done
+
+if [ "$LOOSE" -eq 1 ]; then
+  if [ -n "$GAME_LOVE" ]; then
+    exec "$ROOT/scripts/switch/assemble_loose.sh" "$GAME_LOVE"
+  else
+    exec "$ROOT/scripts/switch/assemble_loose.sh"
+  fi
+fi
+
+echo "error: specify --loose (fused build not implemented yet)" >&2
+exit 2

scripts/switch/assemble_loose.sh

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+#!/usr/bin/env bash
+# Assemble loose-mode Switch dist: gen1recomp.nro + game.love side by side.
+#
+# Usage:
+#   scripts/switch/assemble_loose.sh [path/to/game.love]
+#
+# Defaults game.love to .bazinga/work/game.love. Copies pinned love.nro from
+# .bazinga/love-nx/11.5-nx1/love.nro → dist/switch/loose/gen1recomp.nro.
+# Prints SHA-256 for both outputs. Exits non-zero if love.nro is missing.
+
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "$0")/../.." && pwd)"
+LOVE_NRO="$ROOT/.bazinga/love-nx/11.5-nx1/love.nro"
+GAME_LOVE="${1:-$ROOT/.bazinga/work/game.love}"
+OUT_DIR="$ROOT/dist/switch/loose"
+OUT_NRO="$OUT_DIR/gen1recomp.nro"
+OUT_LOVE="$OUT_DIR/game.love"
+
+fail() { printf 'error: %s\n' "$*" >&2; exit 1; }
+
+if [ ! -f "$LOVE_NRO" ]; then
+  fail "missing pinned love.nro at $LOVE_NRO — fetch per docs/switch-development.md"
+fi
+
+if [ ! -f "$GAME_LOVE" ]; then
+  fail "missing game.love at $GAME_LOVE (build with scripts/build.sh first)"
+fi
+
+mkdir -p "$OUT_DIR"
+cp "$LOVE_NRO" "$OUT_NRO"
+cp "$GAME_LOVE" "$OUT_LOVE"
+
+echo "assembled loose Switch dist:"
+echo "  $OUT_NRO"
+echo "  $OUT_LOVE"
+echo ""
+shasum -a 256 "$OUT_NRO" "$OUT_LOVE"