Replace oxfmt with prettier for code formatting

graphql/codegen/SPEC.md

@@ -59,7 +59,7 @@ GraphQL Schema (endpoint or .graphql file)
     │
     ▼
 ┌─────────────────────────────────────┐
-│  Output Formatting (oxfmt)          │
+│  Output Formatting (prettier)       │
 └─────────────────────────────────────┘
 ```
 

graphql/codegen/package.json

@@ -39,8 +39,8 @@
     "build:dev": "makage build --dev",
     "dev": "ts-node ./src/index.ts",
     "lint": "eslint . --fix",
-    "fmt": "oxfmt",
-    "fmt:check": "oxfmt --check",
+    "fmt": "prettier --write .",
+    "fmt:check": "prettier --check .",
     "test": "jest --passWithNoTests",
     "test:watch": "jest --watch",
     "example:codegen:sdk": "tsx src/cli/index.ts generate --config examples/multi-target.config.ts",
@@ -62,7 +62,7 @@
     "inflekt": "^0.3.0",
     "inquirerer": "^4.4.0",
     "jiti": "^2.6.1",
-    "oxfmt": "^0.13.0"
+    "prettier": "^3.7.4"
   },
   "peerDependencies": {
     "@tanstack/react-query": "^5.0.0",

graphql/codegen/src/__tests__/codegen/__snapshots__/client-generator.test.ts.snap

@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`client-generator generateCreateClientFile generates createClient factory with models 1`] = `
 "/**

graphql/codegen/src/__tests__/codegen/__snapshots__/input-types-generator.test.ts.snap

@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`generateInputTypesFile generates complete types file for multiple tables with relations 1`] = `
 "/**

graphql/codegen/src/__tests__/codegen/__snapshots__/model-generator.test.ts.snap

@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`model-generator generates model with all CRUD methods 1`] = `
 "/**

graphql/codegen/src/__tests__/codegen/__snapshots__/query-keys-factory.test.ts.snap

@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`generateInvalidationFile generates invalidation helpers for a single table without relationships 1`] = `
 "/**

graphql/codegen/src/__tests__/codegen/__snapshots__/react-query-hooks.test.ts.snap

@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`Barrel File Generators generateCustomMutationsBarrel generates custom mutations barrel 1`] = `
 "/**

graphql/codegen/src/__tests__/codegen/__snapshots__/schema-types-generator.test.ts.snap

@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`schema-types-generator generates enum types as string unions 1`] = `
 "/**

graphql/codegen/src/__tests__/codegen/format-output.test.ts

@@ -0,0 +1,37 @@
+/**
+ * Test for formatOutput function
+ * Verifies that prettier formats generated code correctly
+ */
+import * as fs from 'node:fs';
+import * as path from 'node:path';
+import * as os from 'node:os';
+import { formatOutput } from '../../cli/commands/generate';
+
+describe('formatOutput', () => {
+  let tempDir: string;
+
+  beforeEach(() => {
+    tempDir = fs.mkdtempSync(path.join(os.tmpdir(), 'codegen-format-test-'));
+  });
+
+  afterEach(() => {
+    fs.rmSync(tempDir, { recursive: true, force: true });
+  });
+
+  it('formats TypeScript files with bundled config', () => {
+    // Write unformatted code (double quotes, missing semicolons)
+    const unformatted = `const x = "hello"
+const obj = {a: 1,b: 2}
+`;
+    fs.writeFileSync(path.join(tempDir, 'test.ts'), unformatted);
+
+    const result = formatOutput(tempDir);
+
+    expect(result.success).toBe(true);
+
+    // Verify formatting applied (single quotes, semicolons added)
+    const formatted = fs.readFileSync(path.join(tempDir, 'test.ts'), 'utf-8');
+    expect(formatted).toContain("'hello'");
+    expect(formatted).toContain(';');
+  });
+});

graphql/codegen/src/cli/commands/codegen-prettier.json

@@ -0,0 +1,7 @@
+{
+  "singleQuote": true,
+  "trailingComma": "all",
+  "tabWidth": 2,
+  "useTabs": false,
+  "semi": true
+}

graphql/codegen/src/cli/commands/generate.ts

@@ -512,7 +512,7 @@ export async function writeGeneratedFiles(
     process.stdout.write('\r' + ' '.repeat(40) + '\r');
   }
 
-  // Format all generated files with oxfmt
+  // Format all generated files with prettier
   if (errors.length === 0) {
     if (showProgress) {
       console.log('Formatting generated files...');
@@ -531,28 +531,32 @@ export async function writeGeneratedFiles(
 }
 
 /**
- * Format generated files using oxfmt
- * Runs oxfmt on the output directory after all files are written
+ * Format generated files using prettier
+ * Runs prettier on the output directory after all files are written
+ * Uses bundled config with sensible defaults (singleQuote, trailingComma, etc.)
  */
 export function formatOutput(outputDir: string): { success: boolean; error?: string } {
   // Resolve to absolute path for reliable execution
   const absoluteOutputDir = path.resolve(outputDir);
 
   try {
-    // Find oxfmt binary from this package's node_modules/.bin
-    // oxfmt is a dependency of @constructive-io/graphql-codegen
-    const oxfmtPkgPath = require.resolve('oxfmt/package.json');
-    const oxfmtDir = path.dirname(oxfmtPkgPath);
-    const oxfmtBin = path.join(oxfmtDir, 'bin', 'oxfmt');
+    // Find prettier binary from this package's node_modules/.bin
+    // prettier is a dependency of @constructive-io/graphql-codegen
+    const prettierPkgPath = require.resolve('prettier/package.json');
+    const prettierDir = path.dirname(prettierPkgPath);
+    const prettierBin = path.join(prettierDir, 'bin', 'prettier.cjs');
 
-    execSync(`"${oxfmtBin}" "${absoluteOutputDir}"`, {
+    // Use bundled config with sensible defaults
+    const configPath = path.join(__dirname, 'codegen-prettier.json');
+
+    execSync(`"${prettierBin}" --write --config "${configPath}" "${absoluteOutputDir}"`, {
       stdio: 'pipe',
       encoding: 'utf-8',
     });
     return { success: true };
   } catch (err) {
-    // oxfmt may fail if files have syntax errors or if not installed
-    const message = err instanceof Error ? err.message : 'Unknown error';
+    // prettier may fail if files have syntax errors or if not installed
+    const message = err instanceof Error ? err.message : String(err);
     return { success: false, error: message };
   }
 }