chore: turn on lint rule to prefer type over interface

packages/vinext/src/build/prerender.ts

@@ -33,10 +33,10 @@ export { readPrerenderSecret } from "./server-manifest.js";
 
 // ─── Public Types ─────────────────────────────────────────────────────────────
 
-export interface PrerenderResult {
+export type PrerenderResult = {
   /** One entry per route (including skipped/error routes). */
   routes: PrerenderRouteResult[];
-}
+};
 
 export type PrerenderRouteResult =
   | {
@@ -77,7 +77,7 @@ export type PrerenderProgressCallback = (update: {
   status: PrerenderRouteResult["status"];
 }) => void;
 
-export interface PrerenderOptions {
+export type PrerenderOptions = {
   /**
    * 'default' — prerender static/ISR routes; skip SSR routes
    * 'export'  — same as default but SSR routes are errors
@@ -110,9 +110,9 @@ export interface PrerenderOptions {
    * multiple phases and write a single unified manifest itself.
    */
   skipManifest?: boolean;
-}
+};
 
-export interface PrerenderPagesOptions extends PrerenderOptions {
+export type PrerenderPagesOptions = {
   /** Discovered page routes (non-API). */
   routes: Route[];
   /** Discovered API routes. */
@@ -127,16 +127,16 @@ export interface PrerenderPagesOptions extends PrerenderOptions {
    * `runPrerender` passes a shared `_prodServer` instead.
    */
   pagesBundlePath?: string;
-}
+} & PrerenderOptions;
 
-export interface PrerenderAppOptions extends PrerenderOptions {
+export type PrerenderAppOptions = {
   /** Discovered app routes. */
   routes: AppRoute[];
   /**
    * Absolute path to the pre-built RSC handler bundle (e.g. `dist/server/index.js`).
    */
   rscBundlePath: string;
-}
+} & PrerenderOptions;
 
 // ─── Internal option extensions ───────────────────────────────────────────────
 // These types extend the public option interfaces with an internal `_prodServer`

packages/vinext/src/build/report.ts

@@ -29,7 +29,7 @@ import type { PrerenderResult } from "./prerender.js";
 
 export type RouteType = "static" | "isr" | "ssr" | "unknown" | "api";
 
-export interface RouteRow {
+export type RouteRow = {
   pattern: string;
   type: RouteType;
   /** Only set for `isr` routes. */
@@ -40,7 +40,7 @@ export interface RouteRow {
    * Used by `formatBuildReport` to add a note in the legend.
    */
   prerendered?: boolean;
-}
+};
 
 // ─── Regex-based export detection ────────────────────────────────────────────
 

packages/vinext/src/build/run-prerender.ts

@@ -72,7 +72,7 @@ export class PrerenderProgress {
 
 // ─── Shared runner ────────────────────────────────────────────────────────────
 
-export interface RunPrerenderOptions {
+export type RunPrerenderOptions = {
   /** Project root directory. */
   root: string;
   /**
@@ -93,7 +93,7 @@ export interface RunPrerenderOptions {
    * Intended for tests that build to a custom outDir.
    */
   rscBundlePath?: string;
-}
+};
 
 /**
  * Run the prerender phase using pre-built production bundles.

packages/vinext/src/build/static-export.ts

@@ -22,7 +22,7 @@ import type { AppRoute } from "../routing/app-router.js";
 import type { ResolvedNextConfig } from "../config/next-config.js";
 import { prerenderPages, prerenderApp, type PrerenderRouteResult } from "./prerender.js";
 
-export interface StaticExportOptions {
+export type StaticExportOptions = {
   /**
    * Absolute path to the pre-built Pages Router server bundle
    * (e.g. `dist/server/entry.js`).
@@ -38,9 +38,9 @@ export interface StaticExportOptions {
   outDir: string;
   /** Resolved next.config.js */
   config: ResolvedNextConfig;
-}
+};
 
-export interface StaticExportResult {
+export type StaticExportResult = {
   /** Number of HTML files generated */
   pageCount: number;
   /** Generated file paths (relative to outDir) */
@@ -49,7 +49,7 @@ export interface StaticExportResult {
   warnings: string[];
   /** Errors encountered (non-fatal, specific pages) */
   errors: Array<{ route: string; error: string }>;
-}
+};
 
 /**
  * Convert a `PrerenderResult` into the legacy `StaticExportResult` shape.
@@ -103,7 +103,7 @@ export async function staticExportPages(options: StaticExportOptions): Promise<S
   return toStaticExportResult(result.routes);
 }
 
-export interface AppStaticExportOptions {
+export type AppStaticExportOptions = {
   /** Discovered app routes */
   routes: AppRoute[];
   /**
@@ -115,7 +115,7 @@ export interface AppStaticExportOptions {
   outDir: string;
   /** Resolved next.config.js */
   config: ResolvedNextConfig;
-}
+};
 
 /**
  * Run static export for App Router.

packages/vinext/src/check.ts

@@ -13,14 +13,14 @@ import path from "node:path";
 
 type Status = "supported" | "partial" | "unsupported";
 
-interface CheckItem {
+type CheckItem = {
   name: string;
   status: Status;
   detail?: string;
   files?: string[];
-}
+};
 
-export interface CheckResult {
+export type CheckResult = {
   imports: CheckItem[];
   config: CheckItem[];
   libraries: CheckItem[];
@@ -32,7 +32,7 @@ export interface CheckResult {
     total: number;
     score: number;
   };
-}
+};
 
 // ── Import support map ─────────────────────────────────────────────────────
 

packages/vinext/src/cli.ts

@@ -37,14 +37,14 @@ import { loadNextConfig, resolveNextConfig } from "./config/next-config.js";
 // To fix this, we resolve Vite dynamically from `process.cwd()` at runtime
 // using `createRequire`. This ensures we always use the project's Vite.
 
-interface ViteModule {
+type ViteModule = {
   createServer: typeof import("vite").createServer;
   build: typeof import("vite").build;
   createBuilder: typeof import("vite").createBuilder;
   createLogger: typeof import("vite").createLogger;
   loadConfigFromFile: typeof import("vite").loadConfigFromFile;
   version: string;
-}
+};
 
 let _viteModule: ViteModule | null = null;
 
@@ -90,15 +90,15 @@ const VERSION = JSON.parse(fs.readFileSync(new URL("../package.json", import.met
 const command = process.argv[2];
 const rawArgs = process.argv.slice(3);
 
-interface ParsedArgs {
+type ParsedArgs = {
   port?: number;
   hostname?: string;
   help?: boolean;
   verbose?: boolean;
   turbopack?: boolean; // accepted for compat, always ignored
   experimental?: boolean; // accepted for compat, always ignored
   prerenderAll?: boolean;
-}
+};
 
 function parseArgs(args: string[]): ParsedArgs {
   const result: ParsedArgs = {};

packages/vinext/src/client/instrumentation-client.ts

@@ -4,9 +4,9 @@ import {
   setClientInstrumentationHooks,
 } from "./instrumentation-client-state.js";
 
-export interface ClientInstrumentationHooks {
+export type ClientInstrumentationHooks = {
   onRouterTransitionStart?: (href: string, navigationType: "push" | "replace" | "traverse") => void;
-}
+};
 
 export const clientInstrumentationHooks = setClientInstrumentationHooks(
   normalizeClientInstrumentationHooks(instrumentationClientHooks as ClientInstrumentationHooks),

packages/vinext/src/client/vinext-next-data.ts

@@ -7,7 +7,7 @@
  */
 import type { NEXT_DATA } from "../shims/internal/utils.js";
 
-export interface VinextNextData extends NEXT_DATA {
+export type VinextNextData = {
   /** vinext-specific additions (not part of Next.js upstream). */
   __vinext?: {
     /** Absolute URL of the page module for dynamic import. */
@@ -19,4 +19,4 @@ export interface VinextNextData extends NEXT_DATA {
   __pageModule?: string;
   /** Serialised `_app` module path (legacy — used by `client/entry.ts`). */
   __appModule?: string;
-}
+} & NEXT_DATA;

packages/vinext/src/cloudflare/kv-cache-handler.ts

@@ -63,7 +63,7 @@ type SerializedIncrementalCacheValue =
   | SerializedCachedImageValue;
 
 // Cloudflare KV namespace interface (matches Workers types)
-interface KVNamespace {
+type KVNamespace = {
   get(key: string, options?: { type?: string }): Promise<string | null>;
   get(key: string, options: { type: "arrayBuffer" }): Promise<ArrayBuffer | null>;
   put(
@@ -77,16 +77,16 @@ interface KVNamespace {
     list_complete: boolean;
     cursor?: string;
   }>;
-}
+};
 
 /** Shape stored in KV for each cache entry. */
-interface KVCacheEntry {
+type KVCacheEntry = {
   value: SerializedIncrementalCacheValue | null;
   tags: string[];
   lastModified: number;
   /** Absolute timestamp (ms) after which the entry is "stale" (but still served). */
   revalidateAt: number | null;
-}
+};
 
 /** Key prefix for tag invalidation timestamps. */
 const TAG_PREFIX = "__tag:";

packages/vinext/src/cloudflare/tpr.ts

@@ -26,7 +26,7 @@ import { spawn, type ChildProcess } from "node:child_process";
 
 // ─── Types ───────────────────────────────────────────────────────────────────
 
-export interface TPROptions {
+export type TPROptions = {
   /** Project root directory. */
   root: string;
   /** Traffic coverage percentage (0–100). Default: 90. */
@@ -35,9 +35,9 @@ export interface TPROptions {
   limit: number;
   /** Analytics lookback window in hours. Default: 24. */
   window: number;
-}
+};
 
-export interface TPRResult {
+export type TPRResult = {
   /** Total unique page paths found in analytics. */
   totalPaths: number;
   /** Number of pages successfully pre-rendered and uploaded. */
@@ -48,31 +48,31 @@ export interface TPRResult {
   durationMs: number;
   /** If TPR was skipped, the reason. */
   skipped?: string;
-}
+};
 
-interface TrafficEntry {
+type TrafficEntry = {
   path: string;
   requests: number;
-}
+};
 
-interface SelectedRoutes {
+type SelectedRoutes = {
   routes: TrafficEntry[];
   totalRequests: number;
   coveredRequests: number;
   coveragePercent: number;
-}
+};
 
-interface PrerenderResult {
+type PrerenderResult = {
   html: string;
   status: number;
   headers: Record<string, string>;
-}
+};
 
-interface WranglerConfig {
+type WranglerConfig = {
   accountId?: string;
   kvNamespaceId?: string;
   customDomain?: string;
-}
+};
 
 // ─── Wrangler Config Parsing ─────────────────────────────────────────────────
 

packages/vinext/src/config/config-matchers.ts

@@ -421,12 +421,12 @@ export function escapeHeaderSource(source: string): string {
  * Request context needed for evaluating has/missing conditions.
  * Callers extract the relevant parts from the incoming Request.
  */
-export interface RequestContext {
+export type RequestContext = {
   headers: Headers;
   cookies: Record<string, string>;
   query: URLSearchParams;
   host: string;
-}
+};
 
 /**
  * Parse a Cookie header string into a key-value record.

packages/vinext/src/config/dotenv.ts

@@ -4,17 +4,17 @@ import { parseEnv } from "node:util";
 
 export type VinextEnvMode = "development" | "production" | "test";
 
-export interface LoadDotenvOptions {
+export type LoadDotenvOptions = {
   root: string;
   mode: VinextEnvMode;
   processEnv?: NodeJS.ProcessEnv;
-}
+};
 
-export interface LoadDotenvResult {
+export type LoadDotenvResult = {
   mode: VinextEnvMode;
   loadedFiles: string[];
   loadedEnv: Record<string, string>;
-}
+};
 
 /**
  * Next.js-compatible dotenv lookup order (highest priority first).