fix: bound release builds to one worker by default

app/gateway-api/src/orchestrator/buildRunner.ts

@@ -26,7 +26,17 @@ export interface BuildRunner {
 }
 
 export const MAX_BUILD_OUTPUT_CHARS = 64 * 1024;
-export const RELEASE_TURBO_CONCURRENCY = 2;
+export const DEFAULT_RELEASE_TURBO_CONCURRENCY = 1;
+
+export const resolveReleaseTurboConcurrency = (env?: Record<string, string>): number => {
+    const configured = env?.RELEASE_TURBO_CONCURRENCY?.trim();
+    if (!configured) return DEFAULT_RELEASE_TURBO_CONCURRENCY;
+    const parsed = Number(configured);
+    if (!Number.isInteger(parsed) || parsed <= 0) {
+        throw new Error('RELEASE_TURBO_CONCURRENCY must be a positive integer.');
+    }
+    return parsed;
+};
 
 export const resolveReleaseTurboCacheDir = (cacheAnchorRoot: string, env?: Record<string, string>): string => {
     const configured = env?.TURBO_CACHE_DIR?.trim();
@@ -48,7 +58,7 @@ export const buildTurboReleaseCommand = (
         'build',
         ...packageNames.map((packageName) => `--filter=${packageName}`),
         `--cache-dir=${resolveReleaseTurboCacheDir(cacheAnchorRoot, env)}`,
-        `--concurrency=${RELEASE_TURBO_CONCURRENCY}`,
+        `--concurrency=${resolveReleaseTurboConcurrency(env)}`,
         '--ui=stream',
         '--output-logs=new-only',
     ],

app/gateway-api/test/buildRunner.test.ts

@@ -7,6 +7,7 @@ import {
     MAX_BUILD_OUTPUT_CHARS,
     PnpmBuildRunner,
     resolveReleaseTurboCacheDir,
+    resolveReleaseTurboConcurrency,
 } from '../src/orchestrator/buildRunner.js';
 
 describe('Turbo release build plan', () => {
@@ -24,6 +25,14 @@ describe('Turbo release build plan', () => {
         ).toBe('/srv/core/repository/.cache/turbo');
     });
 
+    it('defaults to one worker for bounded runtimes and accepts a larger-host override', () => {
+        expect(resolveReleaseTurboConcurrency()).toBe(1);
+        expect(resolveReleaseTurboConcurrency({ RELEASE_TURBO_CONCURRENCY: '2' })).toBe(2);
+        expect(() => resolveReleaseTurboConcurrency({ RELEASE_TURBO_CONCURRENCY: '0' })).toThrow(
+            'RELEASE_TURBO_CONCURRENCY must be a positive integer.'
+        );
+    });
+
     it('uses a bounded streaming Turbo build for the selected packages', () => {
         expect(
             buildTurboReleaseCommand(
@@ -41,7 +50,7 @@ describe('Turbo release build plan', () => {
                 'build',
                 '--filter=@sammo-ts/game-api',
                 '--cache-dir=/srv/core/repository/.turbo/release-cache',
-                '--concurrency=2',
+                '--concurrency=1',
                 '--ui=stream',
                 '--output-logs=new-only',
             ],

app/gateway-api/test/orchestratorPlan.test.ts

@@ -237,7 +237,7 @@ describe('buildWorkspaceCommands', () => {
                 '--filter=@sammo-ts/game-api',
                 '--filter=@sammo-ts/gateway-api',
                 '--cache-dir=/srv/sammo/controller/.turbo/release-cache',
-                '--concurrency=2',
+                '--concurrency=1',
                 '--ui=stream',
                 '--output-logs=new-only',
             ],

app/release-controller/README.md

@@ -32,6 +32,9 @@ Gateway process 환경에 전달하지 않습니다. 이 값이 frontend 정의
 - `TURBO_CACHE_DIR`: 선택 사항인 공유 local cache 경로입니다. 없으면 원래
   `RELEASE_CONTROLLER_WORKSPACE_ROOT/.turbo/release-cache`를 사용합니다. 상대 경로는
   원래 workspace 기준으로 해석합니다.
+- `RELEASE_TURBO_CONCURRENCY`: Turbo worker 수입니다. 기본값 1은 실행 중인 game/Gateway
+  process와 4 GiB runtime을 공유하는 production cold build의 OOM을 피합니다. 더 큰
+  격리 build host에서만 측정 후 2 이상으로 올립니다.
 
 비밀값은 Git에서 제외된 환경 파일 또는 process 환경으로 전달해 주세요.
 `VITE_*`에는 공개 URL만 넣어 주세요.
@@ -49,7 +52,7 @@ DEPLOY의 rollback이 frontend build가 없는 controller worktree를 이전 Gat
 
 ```sh
 pnpm install --frozen-lockfile
-pnpm exec turbo run build --filter=@sammo-ts/release-controller --concurrency=2 --ui=stream
+pnpm exec turbo run build --filter=@sammo-ts/release-controller --concurrency=1 --ui=stream
 pnpm --filter @sammo-ts/infra prisma:migrate:deploy:gateway
 pnpm --filter @sammo-ts/release-controller start
 ```