diff --git a/scripts/check-environment-readiness.sh b/scripts/check-environment-readiness.sh
index 8a8095a..dca5713 100755
--- a/scripts/check-environment-readiness.sh
+++ b/scripts/check-environment-readiness.sh
@@ -131,6 +131,35 @@ valid_nonempty_csv() {
   done
 }
 
+valid_public_rate_limit_policy() {
+  local json=$1
+
+  command -v jq >/dev/null 2>&1 || return 1
+
+  printf '%s' "$json" | jq -e '
+    type == "object" and
+    length > 0 and
+    ([
+      "registration_email",
+      "registration_ip",
+      "magic_link_email",
+      "magic_link_ip",
+      "password_login_email",
+      "password_login_ip",
+      "email_change_email",
+      "email_change_ip",
+      "support_request",
+      "support_request_ip",
+      "content_removal_notice",
+      "content_removal_notice_ip"
+    ] | all(. as $action |
+      ($json[$action] | type == "object") and
+      ($json[$action].limit | type == "number" and floor == . and . > 0) and
+      ($json[$action].window_seconds | type == "number" and floor == . and . > 0)
+    ))
+  ' --argjson json "$json" >/dev/null 2>&1
+}
+
 failures=0
 warnings=0
 
@@ -202,6 +231,17 @@ else
   missing "support inbox" "SUPPORT_INBOX_ADDRESS"
 fi
 
+rate_limit_policies_json=$(value RATE_LIMIT_POLICIES_JSON)
+if [[ "$deployment_env" == test && "$rate_limit_policies_json" == "{}" ]]; then
+  local_only "public rate limits" "all shared counters are disabled for this isolated test deployment"
+elif [[ -z "$rate_limit_policies_json" ]]; then
+  missing "public rate limits" "RATE_LIMIT_POLICIES_JSON"
+elif valid_public_rate_limit_policy "$rate_limit_policies_json"; then
+  ready "public rate limits" "authentication and anonymous-intake policies are enabled"
+else
+  invalid "public rate limits" "required public policies are missing, malformed, or disabled"
+fi
+
 if all_empty GOOGLE_OAUTH_CLIENT_ID GOOGLE_OAUTH_CLIENT_SECRET; then
   missing "Google sign-in" "GOOGLE_OAUTH_CLIENT_ID and GOOGLE_OAUTH_CLIENT_SECRET"
 elif all_set GOOGLE_OAUTH_CLIENT_ID GOOGLE_OAUTH_CLIENT_SECRET; then
diff --git a/scripts/quality.sh b/scripts/quality.sh
index 7bcbe0b..1913768 100755
--- a/scripts/quality.sh
+++ b/scripts/quality.sh
@@ -671,6 +671,20 @@ grep -Fx 'GOOGLE_OAUTH_AUTHORIZED_PARTY_IDS=quality-production-android-client' \
   "$production_env" >/dev/null
 ./scripts/validate-production-env.sh "$production_env" help.test >/dev/null
 ./scripts/check-environment-readiness.sh "$production_env" --require-release >/dev/null
+disabled_rate_limits_env="$scan_dir/production.disabled-rate-limits.env"
+cp "$production_env" "$disabled_rate_limits_env"
+sed -i 's|^RATE_LIMIT_POLICIES_JSON=.*|RATE_LIMIT_POLICIES_JSON={}|' \
+  "$disabled_rate_limits_env"
+if ./scripts/validate-production-env.sh \
+  "$disabled_rate_limits_env" help.test >/dev/null 2>&1; then
+  echo "Production validation accepted disabled shared rate limits." >&2
+  exit 1
+fi
+if ./scripts/check-environment-readiness.sh \
+  "$disabled_rate_limits_env" --require-release >/dev/null 2>&1; then
+  echo "Environment readiness accepted disabled shared rate limits." >&2
+  exit 1
+fi
 if PRODUCTION_CODEX_SESSION_ID=00000000-0000-0000-0000-000000000001 \
   PRODUCTION_WNH_FIREBASE_APPLICATION_ID=1:987654321:android:quality \
   PRODUCTION_WNH_FIREBASE_API_KEY=quality-public-client-key \
diff --git a/scripts/validate-production-env.sh b/scripts/validate-production-env.sh
index 3b785aa..209e5a2 100755
--- a/scripts/validate-production-env.sh
+++ b/scripts/validate-production-env.sh
@@ -92,6 +92,38 @@ valid_nonempty_csv() {
   done
 }
 
+valid_public_rate_limit_policy() {
+  local json=$1
+
+  command -v jq >/dev/null 2>&1 || {
+    echo "Required command is unavailable for rate-limit validation: jq" >&2
+    return 1
+  }
+
+  printf '%s' "$json" | jq -e '
+    type == "object" and
+    length > 0 and
+    ([
+      "registration_email",
+      "registration_ip",
+      "magic_link_email",
+      "magic_link_ip",
+      "password_login_email",
+      "password_login_ip",
+      "email_change_email",
+      "email_change_ip",
+      "support_request",
+      "support_request_ip",
+      "content_removal_notice",
+      "content_removal_notice_ip"
+    ] | all(. as $action |
+      ($json[$action] | type == "object") and
+      ($json[$action].limit | type == "number" and floor == . and . > 0) and
+      ($json[$action].window_seconds | type == "number" and floor == . and . > 0)
+    ))
+  ' --argjson json "$json" >/dev/null 2>&1
+}
+
 reject_marker() {
   local key=$1
   local value=$2
@@ -145,6 +177,7 @@ smtp_tls=$(optional_value SMTP_TLS)
 smtp_ssl=$(optional_value SMTP_SSL)
 email_from_address=$(require_value EMAIL_FROM_ADDRESS)
 support_inbox_address=$(optional_value SUPPORT_INBOX_ADDRESS)
+rate_limit_policies_json=$(require_value RATE_LIMIT_POLICIES_JSON)
 google_oauth_client_id=$(optional_value GOOGLE_OAUTH_CLIENT_ID)
 google_oauth_client_secret=$(optional_value GOOGLE_OAUTH_CLIENT_SECRET)
 google_oauth_authorized_party_ids=$(optional_value GOOGLE_OAUTH_AUTHORIZED_PARTY_IDS)
@@ -374,6 +407,11 @@ if [[ -n "$support_inbox_address" &&
   exit 1
 fi
 
+valid_public_rate_limit_policy "$rate_limit_policies_json" || {
+  echo "RATE_LIMIT_POLICIES_JSON must enable every documented public authentication and intake policy with positive integer limit and window_seconds values; {} is reserved for isolated tests." >&2
+  exit 1
+}
+
 if [[ -n "$google_oauth_client_id" || -n "$google_oauth_client_secret" ]]; then
   [[ -n "$google_oauth_client_id" && -n "$google_oauth_client_secret" ]] || {
     echo "Google OAuth client ID and secret must either both be set or both be empty." >&2