diff --git a/tools/hako_check.sh b/tools/hako_check.sh
index 03acd87a..ce939b39 100644
--- a/tools/hako_check.sh
+++ b/tools/hako_check.sh
@@ -78,10 +78,18 @@ run_one() {
   HAKO_ENABLE_USING=1 \
   NYASH_USING_AST=1 \
   NYASH_NY_COMPILER_TIMEOUT_MS="${NYASH_NY_COMPILER_TIMEOUT_MS:-8000}" \
+  HAKO_CHECK_DEBUG="${HAKO_CHECK_DEBUG:-0}" \
+  HAKO_CHECK_VERBOSE="${HAKO_CHECK_VERBOSE:-0}" \
   "$BIN" --backend vm "$ROOT/tools/hako_check/cli.hako" -- "${args_arr[@]}" --format "$FORMAT" $EXTRA_ARGS \
     >"/tmp/hako_lint_out_$$.log" 2>&1 || true
   local out rc
   out="$(cat "/tmp/hako_lint_out_$$.log")"; rc=0
+
+  # Phase 1: Filter out debug noise unless HAKO_CHECK_DEBUG=1
+  if [ "${HAKO_CHECK_DEBUG:-0}" != "1" ]; then
+    out="$(echo "$out" | grep -v '^\[DEBUG' | grep -v '^\[ControlForm::' | grep -v '^\[BUILDER\]' | grep -v '^\[rule/exec\]')"
+  fi
+
   # Extract RC
   if echo "$out" | grep -q '^RC: '; then
     rc="$(echo "$out" | sed -n 's/^RC: //p' | tail -n1)"