diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..ff6df15
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,22 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.5.0
+    hooks:
+      - id: end-of-file-fixer
+        exclude: "business-facing/layer"
+      - id: trailing-whitespace
+        exclude: "business-facing/layer"
+      - id: check-yaml
+        exclude: "business-facing/layer"
+      - id: check-json
+        exclude: "business-facing/layer"
+
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+  # Ruff version.
+    rev: v0.4.4
+    hooks:
+      # Run the linter, and enable lint fixes
+      - id: ruff
+        args: [ --fix ]
+      # Run the formatter.
+      - id: ruff-format
diff --git a/README.md b/README.md
index 76aec1a..98e33b7 100644
--- a/README.md
+++ b/README.md
@@ -375,3 +375,20 @@ Example usage:
 
 
 Since the `EDTFField` and the `_earliest` and `_latest` field values are set automatically, you may want to make them readonly, or not visible in your model admin.
+
+## To develop
+### Setup
+- Clone the repository: `git clone https://github.com/ixc/python-edtf.git`
+- Set up a virtual environment: `python3 -m venv venv`
+- Install the dependencies: `pip install -r dev-requirements.txt`
+- Install precommit hooks: `pre-commit install`
+
+### Running tests
+- From `python-edtf`, run the unit tests: `pytest`
+- From `python-edtf/edtf_django_tests`, run the integration tests: `python manage.py test edtf_integration`
+
+### Linting and formatting
+- Check linting: `ruff check --output-format=github --config pyproject.toml`
+- Check formatting: `ruff format --check --config pyproject.toml`
+- Fix formatting: `ruff format --config pyproject.toml`
+- Linting and formatting checks and attempted fixes are also run as precommit hooks if you installed them.
diff --git a/dev-requirements.txt b/dev-requirements.txt
new file mode 100644
index 0000000..1e37df5
--- /dev/null
+++ b/dev-requirements.txt
@@ -0,0 +1,5 @@
+-r requirements.txt  # Include all main requirements
+django>=4.2,<5.0
+pytest
+ruff
+pre-commit
diff --git a/edtf/__init__.py b/edtf/__init__.py
index 4d423fa..7bb2885 100644
--- a/edtf/__init__.py
+++ b/edtf/__init__.py
@@ -1,4 +1,31 @@
-from edtf.convert import (
+from edtf.natlang import text_to_edtf
+from edtf.parser import (
+    UA,
+    Consecutives,
+    Date,
+    DateAndTime,
+    EarlierConsecutives,
+    EDTFObject,
+    EDTFParseException,
+    ExponentialYear,
+    Interval,
+    LaterConsecutives,
+    Level1Interval,
+    Level2Interval,
+    Level2Season,
+    LongYear,
+    MultipleDates,
+    OneOfASet,
+    PartialUncertainOrApproximate,
+    PartialUnspecified,
+    Season,
+    UncertainOrApproximate,
+    Unspecified,
+    UnspecifiedIntervalSection,
+    parse_edtf,
+)
+
+from .convert import (
     dt_to_struct_time,
     jd_to_struct_time,
     old_specs_to_new_specs_expression,
@@ -7,6 +34,40 @@
     struct_time_to_jd,
     trim_struct_time,
 )
-from edtf.natlang import text_to_edtf
-from edtf.parser.grammar import parse_edtf
-from edtf.parser.parser_classes import *
+
+# public
+__all__ = [
+    "dt_to_struct_time",
+    "jd_to_struct_time",
+    "old_specs_to_new_specs_expression",
+    "struct_time_to_date",
+    "struct_time_to_datetime",
+    "struct_time_to_jd",
+    "trim_struct_time",
+    "text_to_edtf",
+    "parse_edtf",
+    # parser_exceptions
+    "EDTFParseException",
+    # parser_classes
+    "EDTFObject",
+    "Date",
+    "DateAndTime",
+    "Interval",
+    "UA",
+    "UncertainOrApproximate",
+    "UnspecifiedIntervalSection",
+    "Unspecified",
+    "Level1Interval",
+    "LongYear",
+    "Season",
+    "PartialUncertainOrApproximate",
+    "PartialUnspecified",
+    "Consecutives",
+    "EarlierConsecutives",
+    "LaterConsecutives",
+    "OneOfASet",
+    "MultipleDates",
+    "Level2Interval",
+    "Level2Season",
+    "ExponentialYear",
+]
diff --git a/edtf/fields.py b/edtf/fields.py
index 525fef6..f717592 100644
--- a/edtf/fields.py
+++ b/edtf/fields.py
@@ -89,7 +89,7 @@ def from_db_value(self, value, expression, connection):
 
         try:
             # Try to unpickle if the value was pickled
-            return pickle.loads(value)
+            return pickle.loads(value)  # noqa S301
         except (pickle.PickleError, TypeError):
             # If it fails because it's not pickled data, try parsing as EDTF
             return parse_edtf(value, fail_silently=True)
diff --git a/edtf/natlang/__init__.py b/edtf/natlang/__init__.py
index 325672f..463863c 100644
--- a/edtf/natlang/__init__.py
+++ b/edtf/natlang/__init__.py
@@ -1 +1,3 @@
 from .en import text_to_edtf
+
+__all__ = ["text_to_edtf"]
diff --git a/edtf/parser/__init__.py b/edtf/parser/__init__.py
index e5a0e5f..43197d5 100644
--- a/edtf/parser/__init__.py
+++ b/edtf/parser/__init__.py
@@ -1,2 +1,51 @@
-from edtf.parser.grammar import parse_edtf
-from edtf.parser.parser_classes import *
+from .edtf_exceptions import EDTFParseException
+from .grammar import parse_edtf
+from .parser_classes import (
+    UA,
+    Consecutives,
+    Date,
+    DateAndTime,
+    EarlierConsecutives,
+    EDTFObject,
+    ExponentialYear,
+    Interval,
+    LaterConsecutives,
+    Level1Interval,
+    Level2Interval,
+    Level2Season,
+    LongYear,
+    MultipleDates,
+    OneOfASet,
+    PartialUncertainOrApproximate,
+    PartialUnspecified,
+    Season,
+    UncertainOrApproximate,
+    Unspecified,
+    UnspecifiedIntervalSection,
+)
+
+__all__ = [
+    "parse_edtf",
+    "EDTFParseException",
+    "EDTFObject",
+    "Date",
+    "DateAndTime",
+    "Interval",
+    "UA",
+    "UncertainOrApproximate",
+    "Unspecified",
+    "UnspecifiedIntervalSection",
+    "Level1Interval",
+    "LongYear",
+    "Season",
+    "PartialUncertainOrApproximate",
+    "PartialUnspecified",
+    "Consecutives",
+    "EarlierConsecutives",
+    "LaterConsecutives",
+    "OneOfASet",
+    "MultipleDates",
+    "Level2Interval",
+    "Level2Season",
+    "ExponentialYear",
+]
diff --git a/edtf_django_tests/edtf_integration/tests.py b/edtf_django_tests/edtf_integration/tests.py
index fbea7f6..88fdca8 100644
--- a/edtf_django_tests/edtf_integration/tests.py
+++ b/edtf_django_tests/edtf_integration/tests.py
@@ -1,8 +1,7 @@
 from django.test import TestCase
 
-from edtf.convert import struct_time_to_jd
-from edtf.parser import EDTFObject
-from edtf.parser.grammar import parse_edtf as parse
+from edtf import EDTFObject, struct_time_to_jd
+from edtf import parse_edtf as parse
 
 from .models import TestEvent
 
diff --git a/pyproject.toml b/pyproject.toml
index 7cebc56..869daf6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,7 +38,8 @@ classifiers = [
 test = [
     "django>=4.2,<5.0",
     "pytest",
-    "ruff"
+    "ruff",
+    "pre-commit",
 ]
 
 [project.urls]
@@ -117,4 +118,3 @@ ignore = [
     # Ignore McCabe complexity (for now).
     "C901",
 ]
-