Update mechanic authoring persistence

src/lib/calculations/mechanic.ts

@@ -28,6 +28,13 @@ export const MECHANIC_EVENT_KINDS = [
   'tick',
 ] as const;
 
+export const PROXIMITY_AGENT_GRANTED_BUFF_ALLY_COUNT_VALUE_KEY =
+  'alliesWithin30MetersWithAgentGrantedBuff' as const;
+export const PROXIMITY_AGENT_GRANTED_BUFF_ALLY_COUNT_FIELD =
+  `values.${PROXIMITY_AGENT_GRANTED_BUFF_ALLY_COUNT_VALUE_KEY}` as const;
+export const PROXIMITY_AGENT_GRANTED_BUFF_ALLY_COUNT_INPUT =
+  'allies-within-30m-with-agent-granted-buff' as const;
+
 export type MechanicEventKind = (typeof MECHANIC_EVENT_KINDS)[number];
 export type MechanicEventDefinition = {
   key: MechanicEventKind;
@@ -39,6 +46,7 @@ export type MechanicEventDefinition = {
     type: 'boolean' | 'number' | 'string';
     required?: boolean;
     minimum?: number;
+    integer?: boolean;
   }[];
   strictFields?: boolean;
 };
@@ -308,6 +316,15 @@ export const MECHANIC_EVENT_REGISTRY: Readonly<
     label: 'Proximity snapshot',
     description:
       'A sampled count or state for nearby allies, enemies, and Agent-owned buffs.',
+    fields: [
+      {
+        path: PROXIMITY_AGENT_GRANTED_BUFF_ALLY_COUNT_FIELD,
+        label: 'Allies within 30 meters with an Agent-granted buff',
+        type: 'number',
+        minimum: 0,
+        integer: true,
+      },
+    ],
   },
   firing_started: {
     key: 'firing_started',
@@ -2049,6 +2066,13 @@ function validateMechanicEvents(events: MechanicEvent[]) {
       ) {
         errors.push(`${fieldPath} must be ${field.minimum} or greater.`);
       }
+      if (
+        field.type === 'number' &&
+        field.integer &&
+        !Number.isInteger(value)
+      ) {
+        errors.push(`${fieldPath} must be an integer.`);
+      }
     }
     const hasExtraHealth = getPath(event, 'values.hasExtraHealth');
     const currentExtraHealth = getPath(event, 'values.currentExtraHealth');