diff --git a/src/bot/filter.ts b/src/bot/filter.ts
index f425690..744a64e 100644
--- a/src/bot/filter.ts
+++ b/src/bot/filter.ts
@@ -12,7 +12,14 @@ function splitWords(filterValue: string): string[] {
 }
 
 export const all = (filter: Filter, input: string) => {
-    throw new Error("'all' filter not implemented");
+    try {
+        const flags = filter.is_insensitive ? "i" : "";
+        return splitWords(filter.value)
+            .every(word => new RegExp(String.raw`\b(${word})\b`, flags).test(input));
+    } catch (error) {
+        console.error(`ALL: Invalid regex pattern: ${filter.value}`, error);
+        return false;
+    }
 };
 
 export const any = (filter: Filter, input: string) => {