diff --git a/.codespellignore b/.codespellignore
new file mode 100644
index 0000000..4d75c60
--- /dev/null
+++ b/.codespellignore
@@ -0,0 +1,4 @@
+mor
+tok
+fpan
+dpan
diff --git a/.github/workflows/linter.yml b/.github/workflows/linter.yml
new file mode 100644
index 0000000..102b38d
--- /dev/null
+++ b/.github/workflows/linter.yml
@@ -0,0 +1,31 @@
+#   Copyright 2026 Google LLC
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+
+name: Lint
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v5
+      with:
+        python-version: '3.x'
+    - uses: pre-commit/action@v3.0.1
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2874c4a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+node_modules/
+.ruff_cache/
+__pycache__/
+.venv/
+*.py[cod]
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..84ce949
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,48 @@
+#   Copyright 2026 Google LLC
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+
+exclude: '^(\.github/|\.vscode/|node_modules/).*|CODE_OF_CONDUCT\.md|CHANGELOG\.md'
+
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v6.0.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: check-yaml
+        args: [--unsafe]
+      - id: check-json
+      - id: check-added-large-files
+      - id: check-shebang-scripts-are-executable
+      - id: check-executables-have-shebangs
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.14.13
+    hooks:
+      - id: ruff
+        args: [--fix, --exit-non-zero-on-fix, --ignore, "D,E501"]
+      - id: ruff-format
+  - repo: https://github.com/pre-commit/mirrors-prettier
+    rev: v4.0.0-alpha.8
+    hooks:
+      - id: prettier
+        files: \.(md|yaml|yml|json)$
+  - repo: https://github.com/koalaman/shellcheck-precommit
+    rev: v0.10.0
+    hooks:
+      - id: shellcheck
+  - repo: https://github.com/codespell-project/codespell
+    rev: v2.4.1
+    hooks:
+      - id: codespell
+        args: ["-I", ".codespellignore"]
diff --git a/.prettierrc b/.prettierrc
new file mode 100644
index 0000000..fb0e95d
--- /dev/null
+++ b/.prettierrc
@@ -0,0 +1,19 @@
+{
+  "tabWidth": 2,
+  "useTabs": false,
+  "trailingComma": "es5",
+  "bracketSameLine": true,
+  "overrides": [
+    {
+      "files": "*.md",
+      "options": {
+        "tabWidth": 4,
+        "useTabs": false,
+        "trailingComma": "es5",
+        "endOfLine": "lf",
+        "printWidth": 80,
+        "proseWrap": "always"
+      }
+    }
+  ]
+}
diff --git a/README.md b/README.md
index 6a04f4b..aecbcf6 100644
--- a/README.md
+++ b/README.md
@@ -26,8 +26,8 @@
 
 This repository contains the Python SDK for the
 [Universal Commerce Protocol (UCP)](https://ucp.dev). It provides Pydantic
-models for UCP schemas, making it easy to build UCP-compliant applications
-in Python.
+models for UCP schemas, making it easy to build UCP-compliant applications in
+Python.
 
 ## Installation
 
@@ -69,7 +69,9 @@ The generated code is automatically formatted using `ruff`.
 
 ## Contributing
 
-We welcome community contributions. See our [Contribution Guide](https://github.com/Universal-Commerce-Protocol/.github/blob/main/CONTRIBUTING.md) for details.
+We welcome community contributions. See our
+[Contribution Guide](https://github.com/Universal-Commerce-Protocol/.github/blob/main/CONTRIBUTING.md)
+for details.
 
 ## License