Bundle the api package with rolldown and a workspace self-reference

The api package no longer rewrites its own name through a tsconfig
path alias and @ttsc/paths. Instead it declares itself in
devDependencies via workspace:^, so the nestia-generated self-imports
resolve through the package "exports" field — the same Node/TypeScript
self-reference mechanism consumers use after npm publish, where the
type-only imports survive solely in the d.ts files and pnpm rewrites
the workspace protocol to a real semver on pack.

The bespoke in-memory rollup + terser pipeline is replaced by the
typia-style rolldown config: ttsc keeps emitting lib/*.js + d.ts, and
rolldown feeds the TypeScript sources through @ttsc/unplugin to emit
1:1 ESM twins at lib/*.mjs with preserveModules. dependabot now tracks
rolldown so the new toolchain stays fresh.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01X9pGKmKPpm1pbc8TkjQqUx

Author: samchon

.github/dependabot.yml

@@ -19,6 +19,7 @@ updates:
       - dependency-name: "typescript"
       - dependency-name: "ttsc"
       - dependency-name: "@ttsc/*"
+      - dependency-name: "rolldown"
     groups:
       Samchon:
         patterns:
@@ -40,3 +41,6 @@ updates:
           - "typescript"
           - "ttsc"
           - "@ttsc/*"
+      Rolldown:
+        patterns:
+          - "rolldown"

packages/api/package.json

@@ -7,10 +7,10 @@
     ".": "./src/index.ts"
   },
   "scripts": {
-    "build": "pnpm build:sdk && pnpm build:ttsc && pnpm build:rollup",
+    "build": "pnpm build:sdk && pnpm build:ttsc && pnpm build:rolldown",
     "build:sdk": "cd ../backend && pnpm build:sdk",
-    "build:ttsc": "ttsc -p tsconfig.json",
-    "build:rollup": "rollup -c",
+    "build:ttsc": "rimraf lib && ttsc -p tsconfig.json",
+    "build:rolldown": "rolldown -c",
     "format": "ttsc format -p tsconfig.json",
     "lint": "ttsc -p tsconfig.json --noEmit",
     "prepack": "pnpm build"
@@ -37,10 +37,12 @@
     "typia": "catalog:samchon"
   },
   "devDependencies": {
-    "@rollup/plugin-terser": "^0.4.4",
+    "@ORGANIZATION/PROJECT-api": "workspace:^",
     "@ttsc/lint": "catalog:typescript",
-    "@ttsc/paths": "catalog:typescript",
-    "rollup": "^4.18.0",
+    "@ttsc/unplugin": "catalog:typescript",
+    "rimraf": "catalog:utils",
+    "rolldown": "catalog:rolldown",
+    "tinyglobby": "^0.2.12",
     "ttsc": "catalog:typescript",
     "typescript": "catalog:typescript"
   },

packages/api/rolldown.config.mjs

@@ -0,0 +1,24 @@
+import ttsc from "@ttsc/unplugin/rolldown";
+import path from "node:path";
+import { globSync } from "tinyglobby";
+
+// The `.mjs` build feeds the TypeScript sources straight to rolldown, which
+// transpiles them natively; `@ttsc/unplugin` applies the project's ttsc
+// plugins on the way in. `preserveModules` keeps the 1:1 module layout, so
+// every `lib/<path>.js` from the main ttsc build gets a genuine ESM twin at
+// `lib/<path>.mjs` — named exports intact, no facade chunks, no CommonJS
+// transcoding. Everything outside `src/` is an external module, including the
+// package's type-only imports of itself.
+export default {
+  input: globSync("./src/**/*.ts"),
+  external: (id) => !id.startsWith(".") && !path.isAbsolute(id),
+  output: {
+    dir: "./lib",
+    format: "esm",
+    sourcemap: true,
+    entryFileNames: "[name].mjs",
+    preserveModules: true,
+    preserveModulesRoot: "src",
+  },
+  plugins: [ttsc()],
+};

packages/api/rollup.config.js

@@ -5,9 +5,6 @@
     "stripInternal": true,
     "outDir": "lib",
     "rootDir": "src",
-    "paths": {
-      "@ORGANIZATION/PROJECT-api": ["./src"]
-    },
     "experimentalDecorators": true,
     "emitDecoratorMetadata": true
   },