diff --git a/.eslintignore b/.eslintignore
new file mode 100644
index 00000000..73270f08
--- /dev/null
+++ b/.eslintignore
@@ -0,0 +1,5 @@
+dist
+/docs
+examples
+node_modules
+types/demo
diff --git a/.eslintrc b/.eslintrc
new file mode 100644
index 00000000..47ca2e38
--- /dev/null
+++ b/.eslintrc
@@ -0,0 +1,42 @@
+{
+  "extends": ["prettier", "eslint:recommended"],
+  "settings": {
+    "import/extensions": ["", ".js", ".ejs", ".json", ".yml", ".jsx"],
+    "import/ignore": [".ejs$", ".yml$", ".jsx", "node_modules"]
+  },
+  "rules": {
+    "no-console": "off",
+    "import/no-unresolved": "off",
+    "no-param-reassign": "off",
+    "filenames/match-regex": "off",
+    "lines-between-class-members": "off",
+    "global-require": "off"
+  },
+  "globals": {
+    "window": true,
+    "$": true
+  },
+  "parserOptions": {
+    "ecmaVersion": 13,
+    "requireConfigFile": false,
+    "sourceType": "module"
+  },
+  "env": {
+    "node": true,
+    "es6": true
+  },
+  "overrides": [
+    {
+      "files": ["**/*.ts"],
+      "parser": "@typescript-eslint/parser",
+      "plugins": ["@typescript-eslint"],
+      "parserOptions": {
+        "ecmaVersion": 2022,
+        "sourceType": "module"
+      },
+      "rules": {
+        "no-undef": "off"
+      }
+    }
+  ]
+}
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6cfd794c..8a01aadc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
       - uses: actions/setup-node@v7
         with:
           node-version: 24
-      - run: EASYPOST_TEST_API_KEY=123 EASYPOST_PROD_API_KEY=123 just install install-styleguide build test
+      - run: EASYPOST_TEST_API_KEY=123 EASYPOST_PROD_API_KEY=123 just install build test
   # node-compatibility checks that the build version of the app can be imported
   # and used on older versions of node
   node-compatibility:
@@ -30,7 +30,7 @@ jobs:
       - uses: actions/setup-node@v7
         with:
           node-version: 24
-      - run: EASYPOST_TEST_API_KEY=123 EASYPOST_PROD_API_KEY=123 just install install-styleguide build
+      - run: EASYPOST_TEST_API_KEY=123 EASYPOST_PROD_API_KEY=123 just install build
       - uses: actions/setup-node@v7
         with:
           node-version: ${{ matrix.node-version }}
@@ -48,7 +48,7 @@ jobs:
           cd types/demo
           npm install
           cd ../../
-          just install install-styleguide typescript
+          just install typescript
   lint:
     runs-on: ubuntu-latest
     steps:
@@ -57,7 +57,7 @@ jobs:
       - uses: actions/setup-node@v7
         with:
           node-version: 24
-      - run: just install install-styleguide build lint
+      - run: just install build lint
   coverage:
     runs-on: ubuntu-latest
     steps:
@@ -66,7 +66,7 @@ jobs:
       - uses: actions/setup-node@v7
         with:
           node-version: 24
-      - run: just install install-styleguide build
+      - run: just install build
       - run: EASYPOST_TEST_API_KEY=123 EASYPOST_PROD_API_KEY=123 just coverage
       - name: Coverage
         if: github.ref == 'refs/heads/master'
diff --git a/.gitignore b/.gitignore
index 8092032e..d3c7971d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,7 +15,6 @@ docs
 Icon
 node_modules
 npm-debug.log
-/.eslintrc
 /.eslintignore
 /.prettierrc.yml
 /.prettierignore
diff --git a/.prettierignore b/.prettierignore
new file mode 100644
index 00000000..07356dd8
--- /dev/null
+++ b/.prettierignore
@@ -0,0 +1,15 @@
+.golangci.yml
+.mypy_cache
+.nyc_output
+cassettes
+composer.json
+composer.lock
+coverage
+dist/
+/docs
+examples
+official/fixtures/
+package-lock.json
+style_guides/
+vendor/
+venv/
diff --git a/.prettierrc.yml b/.prettierrc.yml
new file mode 100644
index 00000000..72620da5
--- /dev/null
+++ b/.prettierrc.yml
@@ -0,0 +1,3 @@
+trailingComma: all
+singleQuote: true
+printWidth: 100
diff --git a/audit-ci.jsonc b/audit-ci.jsonc
index 3621ba8d..009d4335 100644
--- a/audit-ci.jsonc
+++ b/audit-ci.jsonc
@@ -9,5 +9,7 @@
     "GHSA-7r86-cg39-jmmj",
     "GHSA-mh99-v99m-4gvg",
     "GHSA-rgw5-rvv9-x895",
+    "GHSA-5p4m-2wfm-xmqj",
+    "GHSA-7p8r-x3mc-p8w7",
   ],
 }
diff --git a/package.json b/package.json
index 14ba2f5d..0134f858 100644
--- a/package.json
+++ b/package.json
@@ -29,13 +29,15 @@
     "docs": "jsdoc src/models src/services src/errors src/utils -d docs",
     "format": "prettier --write .",
     "formatCheck": "prettier --check .",
-    "lint": "eslint --ext .js,.ts .",
-    "lintFix": "eslint --ext .js,.ts --fix .",
+    "lint": "eslint --ext .js,.ts --ignore-pattern 'examples/**' .",
+    "lintFix": "eslint --ext .js,.ts --ignore-pattern 'examples/**' --fix .",
     "prepublishOnly": "npm run clean && npm run build && npm run test && npm run lint && npm run formatCheck",
     "scan": "npx audit-ci -m --config ./audit-ci.jsonc",
     "test": "cross-env NODE_ENV=test vitest run",
     "test:node-compatibility": "cross-env NODE_ENV=test node ./test/node_compatibility",
-    "typescript": "npx tsc",
+    "typescript": "npm run typescript:declarations && npm run typescript:source",
+    "typescript:declarations": "npx tsc -p tsconfig.json",
+    "typescript:source": "npx tsc -p tsconfig.build.json",
     "watch": "vite build --watch"
   },
   "dependencies": {
diff --git a/tsconfig.base.json b/tsconfig.base.json
new file mode 100644
index 00000000..a62fb87a
--- /dev/null
+++ b/tsconfig.base.json
@@ -0,0 +1,11 @@
+{
+  "compilerOptions": {
+    "target": "es5",
+    "module": "nodenext",
+    "strict": true,
+    "ignoreDeprecations": "5.0",
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "skipLibCheck": true
+  }
+}
diff --git a/tsconfig.build.json b/tsconfig.build.json
new file mode 100644
index 00000000..e301a68b
--- /dev/null
+++ b/tsconfig.build.json
@@ -0,0 +1,11 @@
+{
+  "extends": "./tsconfig.base.json",
+  "compilerOptions": {
+    "allowJs": true,
+    "checkJs": false,
+    "declaration": true,
+    "noEmit": true
+  },
+  "include": ["src/**/*.js", "src/**/*.ts", "test/**/*.js", "test/**/*.ts"],
+  "exclude": ["dist/**", "docs/**", "coverage/**", "node_modules/**"]
+}
diff --git a/tsconfig.json b/tsconfig.json
index f0fc974b..1f0f4c7e 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,11 +1,7 @@
 {
+  "extends": "./tsconfig.base.json",
   "compilerOptions": {
-    "target": "es5",
-    "module": "nodenext",
-    "strict": true,
-    "noEmit": true,
-    "esModuleInterop": true,
-    "forceConsistentCasingInFileNames": true
+    "noEmit": true
   },
   "include": ["types"]
 }