refactor: enforce package boundaries

app/game-engine/src/turn/runtimeTrace.ts

@@ -0,0 +1,35 @@
+import type { TraceEvent, TracePort, TraceSubject } from '@sammo-ts/logic/ports/trace.js';
+
+const parseIds = (value: string | undefined): Set<string> => new Set(value?.split(',') ?? []);
+
+const intersects = (configured: ReadonlySet<string>, requested: readonly number[] | undefined): boolean =>
+    requested?.some((id) => configured.has(String(id))) ?? false;
+
+export const createRuntimeTrace = (
+    env: NodeJS.ProcessEnv = process.env,
+    write: (line: string) => void = (line) => process.stdout.write(line)
+): TracePort => {
+    const generalIds = parseIds(env.CORE_AI_TRACE_GENERAL_IDS);
+    const nationIds = parseIds(env.CORE_AI_TRACE_NATION_IDS);
+    const warTechNationIds = parseIds(env.CORE_WAR_TECH_TRACE_NATION_IDS);
+
+    return {
+        isEnabled(event: TraceEvent, subject: TraceSubject = {}): boolean {
+            switch (event) {
+                case 'AI_ACTION_PATCH_TRACE':
+                    return intersects(generalIds, subject.generalIds) || intersects(nationIds, subject.nationIds);
+                case 'AI_WAR_TRACE':
+                    return intersects(generalIds, subject.generalIds);
+                case 'AI_WAR_FIXTURE_CORE':
+                    return env.CORE_BATTLE_FIXTURE_TRACE === '1';
+                case 'WAR_TECH_TRACE':
+                    return intersects(warTechNationIds, subject.nationIds);
+                default:
+                    return false;
+            }
+        },
+        write(event: TraceEvent, payload: unknown): void {
+            write(`${event} ${JSON.stringify(payload)}\n`);
+        },
+    };
+};