fix(parser): normalize tsconfig compiler options for ts-morph

TS 6.0 (bundled in ts-morph@28 via @ts-morph/common@0.29) refuses raw
JSON compilerOptions with string-form enum values like
target: "ESNext", throwing:

  target is a string value; tsconfig JSON must be parsed with
  parseJsonSourceFileConfigFileContent or getParsedCommandLineOfConfigFile
  before passing to createProgram

Run compilerOptions through ts.convertCompilerOptionsFromJson before
handing them to ts-morph's Project, so string enums are converted to
their numeric form.

Author: segunadebayo

.changeset/normalize-tsconfig-compiler-options.md

@@ -0,0 +1,20 @@
+---
+'@pandacss/parser': patch
+---
+
+Normalize tsconfig `compilerOptions` before passing them to ts-morph.
+
+TypeScript 6.0 (bundled inside `ts-morph@28` via `@ts-morph/common@0.29`) now refuses to accept
+raw JSON `compilerOptions` with string-form enum values like `target: "ESNext"`. They must be
+converted to numeric enum values via the TypeScript parser API.
+
+Previously, panda forwarded the parsed-as-JSON `compilerOptions` from `get-tsconfig` straight
+to ts-morph, which caused `panda` (codegen and any command that loads source files) to throw:
+
+```
+target is a string value; tsconfig JSON must be parsed with parseJsonSourceFileConfigFileContent
+or getParsedCommandLineOfConfigFile before passing to createProgram
+```
+
+We now run `compilerOptions` through `ts.convertCompilerOptionsFromJson` so string enums are
+normalized before ts-morph instantiates its TypeScript program.

packages/parser/src/project.ts

@@ -12,12 +12,21 @@ import {
   ScriptKind,
   SourceFile,
   Project as TsProject,
+  ts,
   type ProjectOptions as TsProjectOptions,
 } from 'ts-morph'
 import { classifyProject } from './classify'
 import { createParser } from './parser'
 import { ParserResult } from './parser-result'
 
+// TS 6.0 rejects raw JSON compiler options (e.g. `target: "ESNext"`) in createProgram.
+// They must be normalized to numeric enum values via TypeScript's own parser API first.
+const normalizeCompilerOptions = (raw: ts.CompilerOptions | undefined): ts.CompilerOptions => {
+  if (!raw) return {}
+  const { options } = ts.convertCompilerOptionsFromJson(raw, process.cwd())
+  return options
+}
+
 const createTsProject = (options: Partial<TsProjectOptions>) =>
   new TsProject({
     skipAddingFilesFromTsConfig: true,
@@ -28,7 +37,7 @@ const createTsProject = (options: Partial<TsProjectOptions>) =>
       allowJs: true,
       strictNullChecks: false,
       skipLibCheck: true,
-      ...options.compilerOptions,
+      ...normalizeCompilerOptions(options.compilerOptions),
     },
   })