chore: add pre-commit configuration and CI

.cspell.json

@@ -15,9 +15,9 @@
   ],
   "dictionaryDefinitions": [
     {
-        "name": "custom-words",
-        "path": ".cspell/custom-words.txt",
-        "addWords": true
+      "name": "custom-words",
+      "path": ".cspell/custom-words.txt",
+      "addWords": true
     }
   ],
   "dictionaries": [

.cspell/custom-words.txt

@@ -74,6 +74,8 @@ renderable
 repudiable
 schemas
 sdjwt
+shellcheck
+codespell
 shopify
 superfences
 vulnz

.github/workflows/pre-commit.yml

@@ -0,0 +1,30 @@
+#   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: pre-commit
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+      - uses: pre-commit/action@v3.0.1

.gitignore

@@ -3,3 +3,4 @@
 .ruff_cache
 uv.lock
 .venv
+node_modules/

.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]
+      - id: ruff-format
+  - repo: https://github.com/pre-commit/mirrors-prettier
+    rev: v4.0.0-alpha.8
+    hooks:
+      - id: prettier
+        files: \.(json|md|yaml|yml)$
+  - repo: https://github.com/koalaman/shellcheck-precommit
+    rev: v0.10.0
+    hooks:
+      - id: shellcheck
+        args: ["-e", "SC1091", "-e", "SC2086"]
+  - repo: https://github.com/codespell-project/codespell
+    rev: v2.4.1
+    hooks:
+      - id: codespell

LICENSE

@@ -199,4 +199,4 @@
    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.
+   limitations under the License.

test_data/flower_shop/discounts.csv

@@ -1,4 +1,4 @@
 code,type,value,description
 10OFF,percentage,10,10% Off
 WELCOME20,percentage,20,20% Off
-FIXED500,fixed_amount,500,$5.00 Off
+FIXED500,fixed_amount,500,$5.00 Off

test_data/flower_shop/products.csv

@@ -4,4 +4,4 @@ pot_ceramic,Ceramic Pot,1500,https://example.com/pot.jpg
 bouquet_sunflowers,Sunflower Bundle,2500,https://example.com/sunflowers.jpg
 bouquet_tulips,Spring Tulips,3000,https://example.com/tulips.jpg
 orchid_white,White Orchid,4500,https://example.com/orchid.jpg
-gardenias,Gardenias,2000,https://example.com/gardenias.jpg
+gardenias,Gardenias,2000,https://example.com/gardenias.jpg