diff --git a/packages/compiler/tsconfig.app.json b/packages/compiler/tsconfig.app.json
index 564a599..7ee67f9 100644
--- a/packages/compiler/tsconfig.app.json
+++ b/packages/compiler/tsconfig.app.json
@@ -1,4 +1,4 @@
 {
-  "extends": "../../tsconfig.base.json",
+  "extends": "tempblot-config/tsconfig.json",
   "include": ["src"]
 }
diff --git a/packages/compiler/tsconfig.config.json b/packages/compiler/tsconfig.config.json
index 0100358..e82a91d 100644
--- a/packages/compiler/tsconfig.config.json
+++ b/packages/compiler/tsconfig.config.json
@@ -1,5 +1,5 @@
 {
-  "extends": "../../tsconfig.base.json",
+  "extends": "tempblot-config/tsconfig.json",
   "compilerOptions": {
     "baseUrl": "."
   },
diff --git a/packages/compiler/tsconfig.spec.json b/packages/compiler/tsconfig.spec.json
index 909b092..05fb679 100644
--- a/packages/compiler/tsconfig.spec.json
+++ b/packages/compiler/tsconfig.spec.json
@@ -1,5 +1,5 @@
 {
-  "extends": "../../tsconfig.base.json",
+  "extends": "tempblot-config/tsconfig.json",
   "compilerOptions": {
     "baseUrl": "."
   },
diff --git a/packages/config/tsconfig.json b/packages/config/tsconfig.json
index a955ab0..d3ee015 100644
--- a/packages/config/tsconfig.json
+++ b/packages/config/tsconfig.json
@@ -2,13 +2,20 @@
   "$schema": "https://json.schemastore.org/tsconfig",
   "compilerOptions": {
     "target": "ESNext",
+    "lib": ["ES2021"],
+    "types": ["node"],
     "module": "NodeNext",
+    "sourceMap": true,
+    "composite": true,
+    "declaration": true,
     "strict": true,
-    "noEmit": true,
     "verbatimModuleSyntax": true,
     "skipLibCheck": true,
     "allowImportingTsExtensions": true,
-    "erasableSyntaxOnly": true
+    "rewriteRelativeImportExtensions": true,
+    "erasableSyntaxOnly": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true
   },
   "include": ["tsignore.ts", "eslint-preset.js", "eslint.config.mjs"]
 }
diff --git a/packages/language-server/tsconfig.json b/packages/language-server/tsconfig.json
index 3036f8e..ca69544 100644
--- a/packages/language-server/tsconfig.json
+++ b/packages/language-server/tsconfig.json
@@ -1,5 +1,5 @@
 {
-  "extends": "../../tsconfig.base.json",
+  "extends": "tempblot-config/tsconfig.json",
   "compilerOptions": {
     "outDir": "lib",
     "rootDir": "src",
@@ -17,4 +17,4 @@
     "lib",
     "test"
   ]
-}
\ No newline at end of file
+}
diff --git a/packages/language-service/src/language-plugin.ts b/packages/language-service/src/language-plugin.ts
index f0713e0..e0364cc 100644
--- a/packages/language-service/src/language-plugin.ts
+++ b/packages/language-service/src/language-plugin.ts
@@ -1,5 +1,5 @@
 /// <reference types="@volar/typescript" />
-import { CodeMapping, type VirtualCode } from "@volar/language-core";
+import type { CodeMapping, VirtualCode } from "@volar/language-core";
 import { type LanguagePlugin } from "@volar/language-service";
 import {
   getRootBlocks,
@@ -99,7 +99,10 @@ export class TempblotVirtualCode implements VirtualCode {
   // Reuse in custom language service plugin
   rootDocument: ParsedRoot;
 
-  constructor(public snapshot: ts.IScriptSnapshot) {
+  snapshot: ts.IScriptSnapshot;
+
+  constructor(snapshot: ts.IScriptSnapshot) {
+    this.snapshot = snapshot;
     this.mappings = [
       {
         sourceOffsets: [0],
diff --git a/packages/language-service/tsconfig.json b/packages/language-service/tsconfig.json
index 3df0bd9..97fc79b 100644
--- a/packages/language-service/tsconfig.json
+++ b/packages/language-service/tsconfig.json
@@ -1,5 +1,5 @@
 {
-  "extends": "../../tsconfig.base.json",
+  "extends": "tempblot-config/tsconfig.json",
   "include": ["src"],
   "references": [{ "path": "../parser/tsconfig.json" }],
 
diff --git a/packages/parser/tsconfig.json b/packages/parser/tsconfig.json
index 8c97071..1223db8 100644
--- a/packages/parser/tsconfig.json
+++ b/packages/parser/tsconfig.json
@@ -1,5 +1,5 @@
 {
-  "extends": "../../tsconfig.base.json",
+  "extends": "tempblot-config/tsconfig.json",
   "include": ["src"],
   "compilerOptions": {
     "declaration": true,
diff --git a/packages/prettier-plugin/tsconfig.json b/packages/prettier-plugin/tsconfig.json
index d921b32..8d69d41 100644
--- a/packages/prettier-plugin/tsconfig.json
+++ b/packages/prettier-plugin/tsconfig.json
@@ -1,5 +1,5 @@
 {
-  "extends": "../../tsconfig.base.json",
+  "extends": "tempblot-config/tsconfig.json",
   "include": ["src"],
   "compilerOptions": {
     "declaration": true,
diff --git a/packages/typescript-plugin/tsconfig.json b/packages/typescript-plugin/tsconfig.json
index baff0a4..8f2588e 100644
--- a/packages/typescript-plugin/tsconfig.json
+++ b/packages/typescript-plugin/tsconfig.json
@@ -1,5 +1,5 @@
 {
-  "extends": "../../tsconfig.base.json",
+  "extends": "tempblot-config/tsconfig.json",
   "include": ["lib"],
   "references": [{"path": "../language-service/tsconfig.json"}],
   "compilerOptions": {
@@ -9,4 +9,4 @@
     "outDir": "types",
     "rootDir": "lib"
   }
-}
\ No newline at end of file
+}
diff --git a/packages/vscode/tsconfig.json b/packages/vscode/tsconfig.json
index 38bf661..a4b3594 100644
--- a/packages/vscode/tsconfig.json
+++ b/packages/vscode/tsconfig.json
@@ -1,5 +1,5 @@
 {
-	"extends": "../../tsconfig.base.json",
+	"extends": "tempblot-config/tsconfig.json",
 	"compilerOptions": {
 		"outDir": "out",
 		"rootDir": "src",
@@ -7,4 +7,4 @@
 	"include": [
 		"src",
 	]
-}
\ No newline at end of file
+}
diff --git a/tsconfig.base.json b/tsconfig.base.json
index 6f95c3a..180695a 100644
--- a/tsconfig.base.json
+++ b/tsconfig.base.json
@@ -1,19 +1,4 @@
 {
-	"compilerOptions": {
-		"target": "ESNext",
-		"lib": [
-			"ES2021",
-		],
-		"types": ["node"],
-		"module": "NodeNext",
-		"sourceMap": true,
-		"composite": true,
-		"declaration": true,
-		"strict": true,
-		"skipLibCheck": true,
-		"allowImportingTsExtensions": true,
-		"rewriteRelativeImportExtensions": true,
-		"noUnusedLocals": true,
-		"noUnusedParameters": true
-	},
+	"extends": "./packages/config/tsconfig.json",
+	"files": []
 }
-- 
2.51.2


From 9e3b572f172daee69bebacd15591276108c4e2db Mon Sep 17 00:00:00 2001
From: Corbin Crutchley <git@crutchcorn.dev>
Date: Thu, 14 May 2026 03:29:04 -0400
Subject: [PATCH 2/2] chore: handle build spec split

---
 packages/language-service/tsconfig.json      |  2 +-
 packages/parser/eslint.config.mjs            |  4 +---
 packages/parser/package.json                 |  6 +++---
 packages/parser/tsconfig.build.json          |  9 +++++++++
 packages/parser/tsconfig.json                | 12 +++++-------
 packages/parser/tsconfig.spec.json           |  8 ++++++++
 packages/parser/vite.config.ts               |  2 +-
 packages/prettier-plugin/eslint.config.mjs   |  4 +---
 packages/prettier-plugin/package.json        |  4 ++--
 packages/prettier-plugin/tsconfig.build.json | 10 ++++++++++
 packages/prettier-plugin/tsconfig.json       | 13 +++++--------
 packages/prettier-plugin/tsconfig.spec.json  |  8 ++++++++
 packages/prettier-plugin/vite.config.ts      |  2 +-
 13 files changed, 55 insertions(+), 29 deletions(-)
 create mode 100644 packages/parser/tsconfig.build.json
 create mode 100644 packages/parser/tsconfig.spec.json
 create mode 100644 packages/prettier-plugin/tsconfig.build.json
 create mode 100644 packages/prettier-plugin/tsconfig.spec.json

diff --git a/packages/language-service/tsconfig.json b/packages/language-service/tsconfig.json
index 97fc79b..a99a88d 100644
--- a/packages/language-service/tsconfig.json
+++ b/packages/language-service/tsconfig.json
@@ -1,7 +1,7 @@
 {
   "extends": "tempblot-config/tsconfig.json",
   "include": ["src"],
-  "references": [{ "path": "../parser/tsconfig.json" }],
+  "references": [{ "path": "../parser/tsconfig.build.json" }],
 
   "compilerOptions": {
     "declaration": true,
diff --git a/packages/parser/eslint.config.mjs b/packages/parser/eslint.config.mjs
index b3931d8..7eb16fa 100644
--- a/packages/parser/eslint.config.mjs
+++ b/packages/parser/eslint.config.mjs
@@ -6,9 +6,7 @@ export default [
     files: ['**/*.ts', '**/*.tsx', '**/*.mts', '**/*.cts'],
     languageOptions: {
       parserOptions: {
-        projectService: {
-          allowDefaultProject: ['tests/*.ts', 'vite.config.ts'],
-        },
+        projectService: true,
         tsconfigRootDir: import.meta.dirname,
       },
     },
diff --git a/packages/parser/package.json b/packages/parser/package.json
index ed6e903..1e5e56c 100644
--- a/packages/parser/package.json
+++ b/packages/parser/package.json
@@ -14,10 +14,10 @@
     "lib"
   ],
   "scripts": {
-    "build": "tsc --build",
-    "prepack": "tsc --build --clean && tsc --build",
+    "build": "tsc --build tsconfig.build.json",
+    "prepack": "tsc --build tsconfig.build.json --clean && tsc --build tsconfig.build.json",
     "test:lib": "vitest",
-    "test:types": "tsc --noEmit",
+    "test:types": "tsc --noEmit --project tsconfig.spec.json",
     "test:eslint": "eslint ."
   },
   "devDependencies": {
diff --git a/packages/parser/tsconfig.build.json b/packages/parser/tsconfig.build.json
new file mode 100644
index 0000000..1223db8
--- /dev/null
+++ b/packages/parser/tsconfig.build.json
@@ -0,0 +1,9 @@
+{
+  "extends": "tempblot-config/tsconfig.json",
+  "include": ["src"],
+  "compilerOptions": {
+    "declaration": true,
+    "outDir": "lib",
+    "rootDir": "src"
+  }
+}
diff --git a/packages/parser/tsconfig.json b/packages/parser/tsconfig.json
index 1223db8..dcb77f1 100644
--- a/packages/parser/tsconfig.json
+++ b/packages/parser/tsconfig.json
@@ -1,9 +1,7 @@
 {
-  "extends": "tempblot-config/tsconfig.json",
-  "include": ["src"],
-  "compilerOptions": {
-    "declaration": true,
-    "outDir": "lib",
-    "rootDir": "src"
-  }
+  "files": [],
+  "references": [
+    { "path": "./tsconfig.build.json" },
+    { "path": "./tsconfig.spec.json" }
+  ]
 }
diff --git a/packages/parser/tsconfig.spec.json b/packages/parser/tsconfig.spec.json
new file mode 100644
index 0000000..10c6412
--- /dev/null
+++ b/packages/parser/tsconfig.spec.json
@@ -0,0 +1,8 @@
+{
+  "extends": "tempblot-config/tsconfig.json",
+  "include": ["src", "tests", "vite.config.ts"],
+  "compilerOptions": {
+    "noEmit": true,
+    "resolveJsonModule": true
+  }
+}
diff --git a/packages/parser/vite.config.ts b/packages/parser/vite.config.ts
index e3b748f..67c8c62 100644
--- a/packages/parser/vite.config.ts
+++ b/packages/parser/vite.config.ts
@@ -1,5 +1,5 @@
 import { defineConfig } from 'vitest/config'
-import packageJson from './package.json'
+import packageJson from './package.json' with { type: 'json' }
 
 export default defineConfig(({ mode }) => ({
   test: {
diff --git a/packages/prettier-plugin/eslint.config.mjs b/packages/prettier-plugin/eslint.config.mjs
index b3931d8..7eb16fa 100644
--- a/packages/prettier-plugin/eslint.config.mjs
+++ b/packages/prettier-plugin/eslint.config.mjs
@@ -6,9 +6,7 @@ export default [
     files: ['**/*.ts', '**/*.tsx', '**/*.mts', '**/*.cts'],
     languageOptions: {
       parserOptions: {
-        projectService: {
-          allowDefaultProject: ['tests/*.ts', 'vite.config.ts'],
-        },
+        projectService: true,
         tsconfigRootDir: import.meta.dirname,
       },
     },
diff --git a/packages/prettier-plugin/package.json b/packages/prettier-plugin/package.json
index bb510e5..7709185 100644
--- a/packages/prettier-plugin/package.json
+++ b/packages/prettier-plugin/package.json
@@ -14,8 +14,8 @@
     "lib"
   ],
   "scripts": {
-    "build": "tsc --build",
-    "prepack": "tsc --build --clean && tsc --build",
+    "build": "tsc --build tsconfig.build.json",
+    "prepack": "tsc --build tsconfig.build.json --clean && tsc --build tsconfig.build.json",
     "test:lib": "vitest",
     "test:eslint": "eslint ."
   },
diff --git a/packages/prettier-plugin/tsconfig.build.json b/packages/prettier-plugin/tsconfig.build.json
new file mode 100644
index 0000000..0afa833
--- /dev/null
+++ b/packages/prettier-plugin/tsconfig.build.json
@@ -0,0 +1,10 @@
+{
+  "extends": "tempblot-config/tsconfig.json",
+  "include": ["src"],
+  "references": [{ "path": "../parser/tsconfig.build.json" }],
+  "compilerOptions": {
+    "declaration": true,
+    "outDir": "lib",
+    "rootDir": "src"
+  }
+}
diff --git a/packages/prettier-plugin/tsconfig.json b/packages/prettier-plugin/tsconfig.json
index 8d69d41..dcb77f1 100644
--- a/packages/prettier-plugin/tsconfig.json
+++ b/packages/prettier-plugin/tsconfig.json
@@ -1,10 +1,7 @@
 {
-  "extends": "tempblot-config/tsconfig.json",
-  "include": ["src"],
-  "compilerOptions": {
-    "declaration": true,
-    "outDir": "lib",
-    "rootDir": "src"
-  },
-  "references": [{ "path": "../parser" }]
+  "files": [],
+  "references": [
+    { "path": "./tsconfig.build.json" },
+    { "path": "./tsconfig.spec.json" }
+  ]
 }
diff --git a/packages/prettier-plugin/tsconfig.spec.json b/packages/prettier-plugin/tsconfig.spec.json
new file mode 100644
index 0000000..10c6412
--- /dev/null
+++ b/packages/prettier-plugin/tsconfig.spec.json
@@ -0,0 +1,8 @@
+{
+  "extends": "tempblot-config/tsconfig.json",
+  "include": ["src", "tests", "vite.config.ts"],
+  "compilerOptions": {
+    "noEmit": true,
+    "resolveJsonModule": true
+  }
+}
diff --git a/packages/prettier-plugin/vite.config.ts b/packages/prettier-plugin/vite.config.ts
index e3b748f..67c8c62 100644
--- a/packages/prettier-plugin/vite.config.ts
+++ b/packages/prettier-plugin/vite.config.ts
@@ -1,5 +1,5 @@
 import { defineConfig } from 'vitest/config'
-import packageJson from './package.json'
+import packageJson from './package.json' with { type: 'json' }
 
 export default defineConfig(({ mode }) => ({
   test: {