diff --git a/.editorconfig b/.editorconfig
index 65365be6..e21a98ee 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -8,6 +8,8 @@ root = true
 
 indent_style = space
 indent_size = 2
+max_line_length = 120
+quote_type = single
 
 end_of_line = lf
 charset = utf-8
diff --git a/.oxfmtrc.json b/.oxfmtrc.json
index 9d5ce399..074bfce7 100644
--- a/.oxfmtrc.json
+++ b/.oxfmtrc.json
@@ -1,5 +1,4 @@
 {
-  "printWidth": 120,
-  "singleQuote": true,
+  "ignorePatterns": [".changeset/**", "**/lib/**"],
   "trailingComma": "es5"
 }
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index d71400e5..128aaa87 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -39,7 +39,7 @@ yarn lint
 To fix formatting errors, run the following:
 
 ```sh
-yarn lint --fix
+yarn format
 ```
 
 Remember to add tests for your change if possible. Run the unit tests by:
@@ -50,9 +50,9 @@ yarn test
 
 ### Linting and tests
 
-[ESLint](https://eslint.org/), [Prettier](https://prettier.io/), [TypeScript](https://www.typescriptlang.org/)
+[ESLint](https://eslint.org/), [oxfmt](https://oxc.rs/docs/guide/usage/formatter.html), [TypeScript](https://www.typescriptlang.org/)
 
-We use [TypeScript](https://www.typescriptlang.org/) for type checking, [ESLint](https://eslint.org/) with [Prettier](https://prettier.io/) for linting and formatting the code, and [Jest](https://jestjs.io/) for testing.
+We use [TypeScript](https://www.typescriptlang.org/) for type checking, [ESLint](https://eslint.org/) for linting, [oxfmt](https://oxc.rs/docs/guide/usage/formatter.html) for formatting, and [Jest](https://jestjs.io/) for testing.
 
 Our pre-commit hooks verify that the linter and tests pass when committing.
 
diff --git a/docs/agents/style.md b/docs/agents/style.md
index 7e6c0fcb..511f4768 100644
--- a/docs/agents/style.md
+++ b/docs/agents/style.md
@@ -9,6 +9,6 @@
 
 Prefer small modules. Each package exports through its `src/index.ts` — add new public symbols there explicitly.
 
-## Prettier config
+## Formatter config
 
-Single quotes, trailing commas (ES5), `printWidth: 120`. Run `yarn lint` to enforce.
+Oxfmt is the formatter. Keep shared whitespace, quote, and line-length settings in `.editorconfig` when possible; use `.oxfmtrc.json` only for options EditorConfig cannot express. Run `yarn lint` to enforce code formatting.
diff --git a/test-apps/native/.oxfmtrc.json b/test-apps/native/.oxfmtrc.json
index 358db5d9..4e0da720 100644
--- a/test-apps/native/.oxfmtrc.json
+++ b/test-apps/native/.oxfmtrc.json
@@ -1,6 +1,5 @@
 {
   "arrowParens": "avoid",
   "bracketSameLine": true,
-  "singleQuote": true,
   "trailingComma": "all"
 }