docs: add MIR13 mode doc and set PHI-off as default; bridge lowering split (if/loop/try); llvmlite resolver stabilization; curated runner default PHI-off; refresh CURRENT_TASK.md

tools/smokes/curated_phi_invariants.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [[ "${NYASH_CLI_VERBOSE:-0}" == "1" ]]; then
+  set -x
+fi
+
+ROOT_DIR=$(cd "$(dirname "$0")/../.." && pwd)
+
+APPS=(
+  "apps/tests/shortcircuit_nested_selective_assign.nyash"
+  "apps/tests/loop_if_phi.nyash"
+  "apps/tests/ternary_nested.nyash"
+)
+
+echo "[phi] Running curated PHI invariants parity checks (PyVM vs llvmlite)" >&2
+
+FAIL=0
+for app in "${APPS[@]}"; do
+  echo "[phi] case: $app" >&2
+  if ! "$ROOT_DIR/tools/pyvm_vs_llvmlite.sh" "$ROOT_DIR/$app"; then
+    echo "[phi] ❌ parity failed: $app" >&2
+    FAIL=1
+  else
+    echo "[phi] ✅ parity OK: $app" >&2
+  fi
+done
+
+if [[ "$FAIL" -ne 0 ]]; then
+  echo "[phi] ❌ curated PHI invariants parity has failures" >&2
+  exit 1
+fi
+echo "[phi] ✅ all curated PHI invariants cases passed"
+