build: add contributor fast profile (#12192)

CONTRIBUTING.md

@@ -73,6 +73,9 @@ npm run dev
 npm run build    # next build → .build/next/ then assembleStandalone → dist/
 npm run start
 
+# Fast backend/API-only build for contributor changes
+npm run build:contributor
+
 # Release build (clean rebuild + HEAD sentinel — required for deploy)
 npm run build:release   # rm -rf .build dist && build + writes dist/BUILD_SHA
 
@@ -100,6 +103,11 @@ npm run build
 `npm run build:release` additionally cleans both directories first and writes
 `dist/BUILD_SHA` (= `git rev-parse --short HEAD`) as a deploy integrity sentinel.
 
+`npm run build:contributor` uses the backend-only build profile. It temporarily stubs
+dashboard UI files while building, keeps API route handlers, and restores the original files
+after the build. Use `npm run build` for changes that affect the dashboard UI or for full
+release validation; the contributor profile is not a replacement for the release build.
+
 > **VPS deploy note:** the remote image directory `/usr/lib/node_modules/omniroute/app/`
 > is unchanged. The deploy skills rsync the contents of `dist/` into it.
 > Only the in-repo build output path moved (`app/` → `dist/`).

package.json

@@ -102,6 +102,7 @@
     "build": "node scripts/build/build-next-isolated.mjs",
     "build:secure": "OMNIROUTE_BUILD_PROFILE=minimal node scripts/build/build-next-isolated.mjs",
     "build:backend": "cross-env OMNIROUTE_BUILD_BACKEND_ONLY=1 node scripts/build/build-next-isolated.mjs",
+    "build:contributor": "cross-env OMNIROUTE_BUILD_PROFILE=contributor node scripts/build/build-next-isolated.mjs",
     "build:cli": "node --import tsx scripts/build/prepublish.ts",
     "omniroute:verify": "node scripts/check/omniroute-verify.mjs",
     "build:release": "rm -rf .build dist && OMNIROUTE_BUILD_SHA=$(git rev-parse --short HEAD) npm run build && npm run build:cli && node scripts/build/write-build-sha.mjs",

scripts/build/backendOnlyPages.mjs

@@ -2,7 +2,7 @@
 /**
  * Backend-only build helper.
  *
- * When `OMNIROUTE_BUILD_BACKEND_ONLY=1` (or `OMNIROUTE_BUILD_PROFILE=backend`) is set,
+ * When `OMNIROUTE_BUILD_BACKEND_ONLY=1` (or `OMNIROUTE_BUILD_PROFILE=backend|contributor`) is set,
  * `build-next-isolated.mjs` calls `stubDashboardPages()` BEFORE `next build` and
  * `restoreDashboardPages()` in a `finally` afterward.
  *
@@ -83,7 +83,11 @@ function stripLeadingUseServer(src) {
 
 /** True when the current build should skip the dashboard frontend. */
 export function isBackendOnlyBuild(env = process.env) {
-  return env.OMNIROUTE_BUILD_BACKEND_ONLY === "1" || env.OMNIROUTE_BUILD_PROFILE === "backend";
+  return (
+    env.OMNIROUTE_BUILD_BACKEND_ONLY === "1" ||
+    env.OMNIROUTE_BUILD_PROFILE === "backend" ||
+    env.OMNIROUTE_BUILD_PROFILE === "contributor"
+  );
 }
 
 function walkFiles(dir, out = []) {

tests/unit/build/backend-only-smoke-workflows.test.ts

@@ -12,6 +12,7 @@ import assert from "node:assert/strict";
 import fs from "node:fs";
 import path from "node:path";
 import * as yaml from "js-yaml";
+import { isBackendOnlyBuild } from "../../../scripts/build/backendOnlyPages.mjs";
 
 interface WorkflowStep {
   name?: string;
@@ -42,6 +43,14 @@ function isBackendOnly(step: WorkflowStep): boolean {
   return env.OMNIROUTE_BUILD_BACKEND_ONLY === "1" || env.OMNIROUTE_BUILD_PROFILE === "backend";
 }
 
+test("contributor build profile enables backend-only mode", () => {
+  assert.equal(isBackendOnlyBuild({ OMNIROUTE_BUILD_PROFILE: "contributor" }), true);
+});
+
+test("full build remains the default when no backend-only profile is set", () => {
+  assert.equal(isBackendOnlyBuild({}), false);
+});
+
 // jobName: null selector means "any job" — used when a file has exactly one
 // "Build CLI bundle" step but we don't want to hardcode/duplicate the job key.
 interface Target {