Observer embryo, Maestro done

GPS/simulationState.js

@@ -0,0 +1,23 @@
+export const SimState = {
+    IDLE: 'idle',
+    PREPARE: 'prepare',
+    LIVE: 'live',
+}
+
+export function validateAgentSets(expected, found) {
+    if(!Array.isArray(expected) || !Array.isArray(found)) {
+        return('agentIds must be arrays')
+    }
+    const exp = new Set(expected)
+    const fnd = new Set(found)
+    if(exp.size !== fnd.size) {
+        return(`Agent count mismatch: expected ${exp.size}, found ${fnd.size}`)
+    }
+    for(const id of exp) {
+        if(!fnd.has(id)) return(`Missing agent: ${id}`)
+    }
+    for(const id of fnd) {
+        if(!exp.has(id)) return(`Unexpected agent: ${id}`)
+    }
+    return(null)
+}