diff --git a/.changeset/young-emus-pump.md b/.changeset/young-emus-pump.md
new file mode 100644
index 00000000..7a50e627
--- /dev/null
+++ b/.changeset/young-emus-pump.md
@@ -0,0 +1,11 @@
+---
+'@powersync/kysely-driver': patch
+'@powersync/react-native': patch
+'@powersync/attachments': patch
+'@powersync/common': patch
+'@powersync/react': patch
+'@powersync/vue': patch
+'@powersync/web': patch
+---
+
+Introduced base tsconfig. SourceMaps are now excluded in dev and release publishes.
diff --git a/.github/workflows/dev-packages.yaml b/.github/workflows/dev-packages.yaml
index 5031b8b9..7bfedb60 100644
--- a/.github/workflows/dev-packages.yaml
+++ b/.github/workflows/dev-packages.yaml
@@ -37,7 +37,7 @@ jobs:
       - name: Install dependencies
         run: pnpm install
       - name: Build
-        run: pnpm build:packages
+        run: pnpm build:packages:prod
       - name: Publish
         run: |
           pnpm changeset version --no-git-tag --snapshot dev
diff --git a/demos/react-native-supabase-todolist/package.json b/demos/react-native-supabase-todolist/package.json
index 20851f24..7cf17cb2 100644
--- a/demos/react-native-supabase-todolist/package.json
+++ b/demos/react-native-supabase-todolist/package.json
@@ -5,8 +5,7 @@
   "scripts": {
     "android": "expo run:android",
     "ios": "expo run:ios",
-    "clean": "watchman watch-del-all && rm -rf .expo",
-    "preinstall": "cd ../.. && pnpm build:packages"
+    "clean": "watchman watch-del-all && rm -rf .expo"
   },
   "dependencies": {
     "@azure/core-asynciterator-polyfill": "^1.0.2",
diff --git a/package.json b/package.json
index 47454d54..1d5efdf5 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,7 @@
   "main": "index.js",
   "scripts": {
     "build:packages": "pnpm run --filter './packages/**' -r build",
+    "build:packages:prod": "pnpm build:packages --sourceMap false",
     "watch:packages": "pnpm run --parallel --filter './packages/**' -r build -w",
     "build": "pnpm run -r build",
     "ci:publish": "changeset publish && git push --follow-tags",
@@ -15,7 +16,7 @@
     "docs:start": "pnpm --filter docs start",
     "format": "prettier --write .",
     "lint": "eslint .",
-    "release": "pnpm build:packages && pnpm changeset publish",
+    "release": "pnpm build:packages:prod && pnpm changeset publish",
     "test": "pnpm run -r test"
   },
   "keywords": [],
diff --git a/packages/attachments/tsconfig.json b/packages/attachments/tsconfig.json
index c3821cad..2e5a4401 100644
--- a/packages/attachments/tsconfig.json
+++ b/packages/attachments/tsconfig.json
@@ -1,22 +1,10 @@
 {
+  "extends": "../../tsconfig.base",
   "compilerOptions": {
     "baseUrl": "./",
-    "esModuleInterop": true,
     "jsx": "react",
     "rootDir": "src",
-    "composite": true,
-    "outDir": "./lib",
-    "lib": ["esnext", "DOM"],
-    "module": "esnext",
-    "sourceMap": true,
-    "moduleResolution": "node",
-    "noFallthroughCasesInSwitch": true,
-    "noImplicitReturns": true,
-    "noImplicitUseStrict": false,
-    "noStrictGenericChecks": false,
-    "resolveJsonModule": true,
-    "skipLibCheck": true,
-    "target": "esnext"
+    "outDir": "./lib"
   },
   "references": [
     {
diff --git a/packages/common/tsconfig.json b/packages/common/tsconfig.json
index 3f9b79e0..43686f95 100644
--- a/packages/common/tsconfig.json
+++ b/packages/common/tsconfig.json
@@ -1,24 +1,13 @@
 {
+  "extends": "../../tsconfig.base",
   "compilerOptions": {
     "baseUrl": "./",
-    "esModuleInterop": true,
     "jsx": "react",
     "types": ["node"],
     "rootDir": "src",
     "outDir": "./lib",
-    "composite": true,
     "lib": ["esnext"],
-    "module": "esnext",
     "declaration": true,
-    "sourceMap": true,
-    "moduleResolution": "node",
-    "noFallthroughCasesInSwitch": true,
-    "noImplicitReturns": true,
-    "noImplicitUseStrict": false,
-    "noStrictGenericChecks": false,
-    "resolveJsonModule": true,
-    "skipLibCheck": true,
-    "target": "esnext",
     "strictNullChecks": true
   },
   "include": ["src/**/*"]
diff --git a/packages/kysely-driver/package.json b/packages/kysely-driver/package.json
index 13e58f59..dc7e7141 100644
--- a/packages/kysely-driver/package.json
+++ b/packages/kysely-driver/package.json
@@ -20,7 +20,7 @@
   "homepage": "https://docs.powersync.com",
   "scripts": {
     "build": "tsc --build",
-    "clean": "rm -rf dist tsconfig.tsbuildinfo",
+    "clean": "rm -rf lib tsconfig.tsbuildinfo",
     "watch": "tsc --build -w",
     "test": "pnpm build && vitest"
   },
diff --git a/packages/kysely-driver/tsconfig.json b/packages/kysely-driver/tsconfig.json
index a112118f..e626ebec 100644
--- a/packages/kysely-driver/tsconfig.json
+++ b/packages/kysely-driver/tsconfig.json
@@ -1,16 +1,12 @@
 {
+  "extends": "../../tsconfig.base",
   "compilerOptions": {
-    "composite": true,
     "baseUrl": "./",
     "declaration": true /* Generates corresponding '.d.ts' file. */,
-    "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
     "forceConsistentCasingInFileNames": true /* Disallow inconsistently-cased references to the same file. */,
     "lib": ["DOM", "ES2020", "WebWorker"] /* Specify library files to be included in the compilation. */,
     "module": "es2020" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */,
-    "moduleResolution": "node" /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */,
     "outDir": "./lib" /* Redirect output structure to the directory. */,
-    "skipLibCheck": true /* Skip type checking of declaration files. */,
-    "sourceMap": true /* Generates corresponding '.map' file. */,
     "strict": true /* Enable all strict type-checking options. */,
     "target": "es6" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */
   },
diff --git a/packages/react-native/tsconfig.json b/packages/react-native/tsconfig.json
index f373a39c..08a47064 100644
--- a/packages/react-native/tsconfig.json
+++ b/packages/react-native/tsconfig.json
@@ -1,22 +1,10 @@
 {
+  "extends": "../../tsconfig.base",
   "compilerOptions": {
     "baseUrl": "./",
-    "esModuleInterop": true,
     "jsx": "react",
     "rootDir": "src",
-    "composite": true,
     "outDir": "./lib",
-    "lib": ["esnext", "DOM"],
-    "module": "esnext",
-    "sourceMap": true,
-    "moduleResolution": "node",
-    "noFallthroughCasesInSwitch": true,
-    "noImplicitReturns": true,
-    "noImplicitUseStrict": false,
-    "noStrictGenericChecks": false,
-    "resolveJsonModule": true,
-    "skipLibCheck": true,
-    "target": "esnext",
     "strictNullChecks": true
   },
   "references": [
diff --git a/packages/react/tsconfig.json b/packages/react/tsconfig.json
index c8cbe375..f660e295 100644
--- a/packages/react/tsconfig.json
+++ b/packages/react/tsconfig.json
@@ -1,22 +1,11 @@
 {
+  "extends": "../../tsconfig.base",
   "compilerOptions": {
     "baseUrl": "./",
-    "esModuleInterop": true,
     "jsx": "react",
     "rootDir": "src",
-    "composite": true,
     "outDir": "./lib",
-    "lib": ["es2022", "DOM"],
-    "module": "esnext",
-    "sourceMap": true,
-    "moduleResolution": "node",
-    "noFallthroughCasesInSwitch": true,
-    "noImplicitReturns": true,
-    "noImplicitUseStrict": false,
-    "noStrictGenericChecks": false,
-    "resolveJsonModule": true,
-    "skipLibCheck": true,
-    "target": "esnext"
+    "lib": ["es2022", "DOM"]
   },
   "references": [
     {
diff --git a/packages/vue/tsconfig.json b/packages/vue/tsconfig.json
index 714b7302..f0b7fa0b 100644
--- a/packages/vue/tsconfig.json
+++ b/packages/vue/tsconfig.json
@@ -1,22 +1,10 @@
 {
+  "extends": "../../tsconfig.base",
   "compilerOptions": {
     "baseUrl": "./",
-    "esModuleInterop": true,
     "jsx": "preserve",
-    "rootDir": "src",
-    "composite": true,
     "outDir": "./lib",
-    "lib": ["es2022", "DOM"],
-    "module": "esnext",
-    "sourceMap": true,
-    "moduleResolution": "node",
-    "noFallthroughCasesInSwitch": true,
-    "noImplicitReturns": true,
-    "noImplicitUseStrict": false,
-    "noStrictGenericChecks": false,
-    "resolveJsonModule": true,
-    "skipLibCheck": true,
-    "target": "esnext"
+    "rootDir": "src"
   },
   "references": [
     {
diff --git a/packages/web/package.json b/packages/web/package.json
index 4774c320..c299b2f0 100644
--- a/packages/web/package.json
+++ b/packages/web/package.json
@@ -19,7 +19,7 @@
   "homepage": "https://docs.powersync.com",
   "scripts": {
     "build": "tsc --build",
-    "clean": "rm -rf dist tsconfig.tsbuildinfo",
+    "clean": "rm -rf lib tsconfig.tsbuildinfo",
     "watch": "tsc --build -w",
     "test": "pnpm build && vitest"
   },
diff --git a/packages/web/tsconfig.json b/packages/web/tsconfig.json
index 10903ae1..4accee0f 100644
--- a/packages/web/tsconfig.json
+++ b/packages/web/tsconfig.json
@@ -1,19 +1,15 @@
 {
+  "extends": "../../tsconfig.base",
   "compilerOptions": {
-    "composite": true,
     "paths": {
       "@powersync/web": ["src/index.ts"]
     },
     "baseUrl": "./",
     "declaration": true /* Generates corresponding '.d.ts' file. */,
-    "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
     "forceConsistentCasingInFileNames": true /* Disallow inconsistently-cased references to the same file. */,
     "lib": ["DOM", "ES2020", "WebWorker"] /* Specify library files to be included in the compilation. */,
     "module": "es2020" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */,
-    "moduleResolution": "node" /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */,
     "outDir": "./lib" /* Redirect output structure to the directory. */,
-    "skipLibCheck": true /* Skip type checking of declaration files. */,
-    "sourceMap": true /* Generates corresponding '.map' file. */,
     "strict": true /* Enable all strict type-checking options. */,
     "target": "es6" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */,
     "strictNullChecks": true
diff --git a/tsconfig.base.json b/tsconfig.base.json
new file mode 100644
index 00000000..150b463d
--- /dev/null
+++ b/tsconfig.base.json
@@ -0,0 +1,17 @@
+{
+  "compilerOptions": {
+    "composite": true,
+    "esModuleInterop": true,
+    "lib": ["esnext", "DOM"],
+    "module": "esnext",
+    "moduleResolution": "node",
+    "noFallthroughCasesInSwitch": true,
+    "noImplicitReturns": true,
+    "noImplicitUseStrict": false,
+    "noStrictGenericChecks": false,
+    "resolveJsonModule": true,
+    "skipLibCheck": true,
+    "sourceMap": true,
+    "target": "esnext"
+  }
+}