From 6973465d46615bf4f91163df3b6649c6fbb705a8 Mon Sep 17 00:00:00 2001
From: Robin Bolscher <robinbolscher@gmail.com>
Date: Thu, 19 Mar 2026 11:48:33 +0100
Subject: [PATCH] fix(types): narrow index signature to `on${string}` template
 literal

Prevents typos on non-handler properties from silently compiling.
---
 index.d.ts                | 2 +-
 scripts/generate-types.js | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/index.d.ts b/index.d.ts
index 3810013..0900b62 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -35,7 +35,7 @@ type ZCLEnum8Status = 'SUCCESS' | 'FAILURE' | 'NOT_AUTHORIZED' | 'RESERVED_FIELD
 
 export interface ZCLNodeCluster extends EventEmitter {
   /** Dynamic command handler methods (e.g. `onZoneStatusChangeNotification`). */
-  [key: string]: unknown;
+  [key: `on${string}`]: unknown;
 
   discoverCommandsGenerated(params?: {
     startValue?: number;
diff --git a/scripts/generate-types.js b/scripts/generate-types.js
index 4c71042..1f5097f 100644
--- a/scripts/generate-types.js
+++ b/scripts/generate-types.js
@@ -287,7 +287,7 @@ type ZCLEnum8Status = ${zclTypeToTS(ZCLDataTypes.enum8Status, false)};
   // Base ZCLNodeCluster interface
   lines.push(`export interface ZCLNodeCluster extends EventEmitter {
   /** Dynamic command handler methods (e.g. \`onZoneStatusChangeNotification\`). */
-  [key: string]: unknown;
+  [key: \`on\${string}\`]: unknown;
 
   discoverCommandsGenerated(params?: {
     startValue?: number;