fix: use unified Prisma CLI when available

composer.mjs

@@ -9,9 +9,17 @@
  *
  * @param {string} composerVersion - @prisma/composer-cli version to fetch via bunx when the local bin is absent.
  * @param {boolean} binExists - Whether node_modules/.bin/prisma-composer exists in the working directory.
+ * @param {boolean} unifiedCliAvailable - Whether the local Prisma CLI mounts the Composer command family.
  * @returns {[string, string[], string]}
  */
-export function selectComposerCommand(composerVersion, binExists) {
+export function selectComposerCommand(composerVersion, binExists, unifiedCliAvailable) {
+  if (unifiedCliAvailable) {
+    return [
+      "bun",
+      ["run", "--bun", "prisma", "composer"],
+      "composer=local Prisma CLI (bun run --bun)",
+    ];
+  }
   if (binExists) {
     return ["bun", ["run", "--bun", "prisma-composer"], "composer=local bin (bun run --bun)"];
   }

main.mjs

@@ -245,15 +245,20 @@ if (buildCommand === null) {
 // The stage reaches the argv array straight from the environment; it is
 // never interpolated into a shell string.
 //
-// The CLI bin is named prisma-composer. From 0.7.0 it ships inside
-// @prisma/composer-cli (previously @prisma/composer); there is no npm package
-// named prisma-composer, so `npx prisma-composer@v` 404s. The repo's own
-// install already provides the bin, so prefer the local bin under Bun; fall
-// back to bunx fetching the pinned package when the repo does not carry it.
+// The unified Prisma CLI accepts every registered prisma.config.ts section,
+// which lets ORM and Composer share one config file.
+const localPrismaBin = join(workdir, "node_modules", ".bin", "prisma");
+const unifiedCliAvailable =
+  existsSync(localPrismaBin) &&
+  spawnSync("bun", ["run", "--bun", "prisma", "composer", "--help"], {
+    cwd: workdir,
+    stdio: "ignore",
+  }).status === 0;
 const localBin = join(workdir, "node_modules", ".bin", "prisma-composer");
 const [composerCmd, composerLead, composerLabel] = selectComposerCommand(
   composerVersion,
   existsSync(localBin),
+  unifiedCliAvailable,
 );
 log(composerLabel);
 const composerArgs = [

tests/composer.test.mjs

@@ -3,14 +3,21 @@ import { test } from "node:test";
 import { selectComposerCommand } from "../composer.mjs";
 
 test("runs the local bin with bun run --bun when it exists", () => {
-  const [cmd, lead, label] = selectComposerCommand("0.9.0", true);
+  const [cmd, lead, label] = selectComposerCommand("0.9.0", true, false);
   assert.equal(cmd, "bun");
   assert.deepEqual(lead, ["run", "--bun", "prisma-composer"]);
   assert.equal(label, "composer=local bin (bun run --bun)");
 });
 
+test("prefers the unified Prisma CLI when it mounts Composer", () => {
+  const [cmd, lead, label] = selectComposerCommand("0.10.0", true, true);
+  assert.equal(cmd, "bun");
+  assert.deepEqual(lead, ["run", "--bun", "prisma", "composer"]);
+  assert.equal(label, "composer=local Prisma CLI (bun run --bun)");
+});
+
 test("falls back to bunx with --bun when the local bin is absent", () => {
-  const [cmd, lead, label] = selectComposerCommand("0.9.0", false);
+  const [cmd, lead, label] = selectComposerCommand("0.9.0", false, false);
   assert.equal(cmd, "bunx");
   assert.deepEqual(lead, [
     "--bun",
@@ -22,11 +29,11 @@ test("falls back to bunx with --bun when the local bin is absent", () => {
 });
 
 test("bunx fallback log label includes the exact version", () => {
-  const [, , label] = selectComposerCommand("0.7.5", false);
+  const [, , label] = selectComposerCommand("0.7.5", false, false);
   assert.equal(label, "composer=0.7.5 (bunx fallback)");
 });
 
 test("local bin label is always the same string regardless of version", () => {
-  const [, , label] = selectComposerCommand("0.7.5", true);
+  const [, , label] = selectComposerCommand("0.7.5", true, false);
   assert.equal(label, "composer=local bin (bun run --bun)");
 });