chore: scaffold tracks and tooling

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/check-stubs.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+# Usage: scripts/check-stubs.sh <js|scala|fsharp>
+# Runs each module M01..M11 that has tests against the stubs in src/. Fails if any module's tests pass.
+set -uo pipefail
+track="${1:?usage: check-stubs.sh <js|scala|fsharp>}"
+repo="$(cd "$(dirname "$0")/.." && pwd)"
+dir="$repo/$track"
+case "$track" in
+  js)     has() { compgen -G "$dir/test/m$1-*.test.js" >/dev/null; } ;;
+  scala)  has() { compgen -G "$dir/test/M$1*.test.scala" >/dev/null; } ;;
+  fsharp) has() { compgen -G "$dir/tests/M$1*.fs" >/dev/null; } ;;
+  *) echo "unknown track: $track" >&2; exit 2 ;;
+esac
+status=0
+for n in 01 02 03 04 05 06 07 08 09 10 11; do
+  m="M$n"
+  if ! has "$n"; then echo "$m: no tests"; continue; fi
+  if (cd "$dir" && ./test.sh "$m") >/dev/null 2>&1; then
+    echo "$m: FAIL (tests pass against stubs)"; status=1
+  else
+    echo "$m: ok (fails against stubs)"
+  fi
+done
+exit $status