diff --git a/.gitignore b/.gitignore
index 63dc29fef..301b915d1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 staticfiles/
+/.ruff_cache/
 
 # Created by https://www.gitignore.io/api/django
 # Edit at https://www.gitignore.io/?templates=django
@@ -123,4 +124,4 @@ dmypy.json
 # End of https://www.gitignore.io/api/django
 
 # Editor settings
-.vscode 
+.vscode
diff --git a/dandiapi/__init__.py b/dandiapi/__init__.py
index f35d40bf1..aabca329d 100644
--- a/dandiapi/__init__.py
+++ b/dandiapi/__init__.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from importlib.metadata import version
 
 # This project module is imported for us when Django starts. To ensure that Celery app is always
diff --git a/dandiapi/analytics/apps.py b/dandiapi/analytics/apps.py
index 59aaa07c4..42d602b34 100644
--- a/dandiapi/analytics/apps.py
+++ b/dandiapi/analytics/apps.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.apps import AppConfig
 
 
diff --git a/dandiapi/analytics/migrations/0001_initial_v2.py b/dandiapi/analytics/migrations/0001_initial_v2.py
index 11d72d202..6ee97e473 100644
--- a/dandiapi/analytics/migrations/0001_initial_v2.py
+++ b/dandiapi/analytics/migrations/0001_initial_v2.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import django.core.validators
 from django.db import migrations, models
 
diff --git a/dandiapi/analytics/models.py b/dandiapi/analytics/models.py
index 39aed4edc..40b2996d2 100644
--- a/dandiapi/analytics/models.py
+++ b/dandiapi/analytics/models.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.core.validators import RegexValidator
 from django.db import models
 
diff --git a/dandiapi/analytics/tasks/__init__.py b/dandiapi/analytics/tasks/__init__.py
index 8b86ad383..2f3037c0c 100644
--- a/dandiapi/analytics/tasks/__init__.py
+++ b/dandiapi/analytics/tasks/__init__.py
@@ -1,6 +1,8 @@
+from __future__ import annotations
+
 from collections import Counter
-from collections.abc import Generator
 from pathlib import Path
+from typing import TYPE_CHECKING
 
 from celery.app import shared_task
 from celery.utils.log import get_task_logger
@@ -15,6 +17,9 @@
 from dandiapi.api.models.asset import AssetBlob, EmbargoedAssetBlob
 from dandiapi.api.storage import get_boto_client, get_embargo_storage, get_storage
 
+if TYPE_CHECKING:
+    from collections.abc import Generator
+
 logger = get_task_logger(__name__)
 
 # should be one of the DANDI_DANDISETS_*_LOG_BUCKET_NAME settings
@@ -77,14 +82,14 @@ def process_s3_log_file_task(bucket: LogBucket, s3_log_key: str) -> None:
         return
 
     s3 = get_boto_client(get_storage() if not embargoed else get_embargo_storage())
-    BlobModel = AssetBlob if not embargoed else EmbargoedAssetBlob
+    BlobModel = AssetBlob if not embargoed else EmbargoedAssetBlob  # noqa: N806
     data = s3.get_object(Bucket=bucket, Key=s3_log_key)
     download_counts = Counter()
 
     for log_entry in s3logparse.parse_log_lines(
         line.decode('utf8') for line in data['Body'].iter_lines()
     ):
-        if log_entry.operation == 'REST.GET.OBJECT' and log_entry.status_code == 200:
+        if log_entry.operation == 'REST.GET.OBJECT' and log_entry.status_code == 200:  # noqa: PLR2004
             download_counts.update({log_entry.s3_key: 1})
 
     with transaction.atomic():
diff --git a/dandiapi/analytics/tests/test_download_counts.py b/dandiapi/analytics/tests/test_download_counts.py
index 0eab45809..4b1f6a480 100644
--- a/dandiapi/analytics/tests/test_download_counts.py
+++ b/dandiapi/analytics/tests/test_download_counts.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.conf import settings
 import pytest
 
diff --git a/dandiapi/api/__init__.py b/dandiapi/api/__init__.py
index 282a42b22..0fa5df86a 100644
--- a/dandiapi/api/__init__.py
+++ b/dandiapi/api/__init__.py
@@ -1,3 +1,4 @@
-# flake8: noqa
+from __future__ import annotations
+
 # TODO: remove this after migration is complete
-import dandiapi.api.user_migration
+import dandiapi.api.user_migration  # noqa: F401
diff --git a/dandiapi/api/admin.py b/dandiapi/api/admin.py
index ee4a78077..06abb2e85 100644
--- a/dandiapi/api/admin.py
+++ b/dandiapi/api/admin.py
@@ -1,4 +1,7 @@
+from __future__ import annotations
+
 import csv
+from typing import TYPE_CHECKING
 
 from allauth.socialaccount.models import SocialAccount
 from django.contrib import admin, messages
@@ -8,7 +11,6 @@
 from django.db.models.aggregates import Count
 from django.db.models.query import Prefetch, QuerySet
 from django.forms.models import BaseInlineFormSet
-from django.http.request import HttpRequest
 from django.http.response import HttpResponse
 from django.urls import reverse
 from django.utils.html import format_html
@@ -26,6 +28,9 @@
 from dandiapi.api.views.users import social_account_to_dict
 from dandiapi.zarr.tasks import ingest_dandiset_zarrs
 
+if TYPE_CHECKING:
+    from django.http.request import HttpRequest
+
 admin.site.site_header = 'DANDI Admin'
 admin.site.site_title = 'DANDI Admin'
 
diff --git a/dandiapi/api/apps.py b/dandiapi/api/apps.py
index bc6ef64b0..93d3f29d6 100644
--- a/dandiapi/api/apps.py
+++ b/dandiapi/api/apps.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import logging
 import re
 
@@ -14,7 +16,7 @@ class PublishConfig(AppConfig):
     verbose_name = 'DANDI: Publish'
 
     @staticmethod
-    def _get_sentry_performance_sample_rate(*args, **kwargs) -> float:
+    def _get_sentry_performance_sample_rate(*args, **kwargs) -> float:  # noqa: ARG004
         from dandiapi.api.models.asset import Asset
         from dandiapi.api.models.dandiset import Dandiset
         from dandiapi.api.models.version import Version
@@ -44,7 +46,8 @@ def is_noisy():
         return 0.001 if is_noisy() else 0.01
 
     def ready(self):
-        import dandiapi.api.checks  # noqa: F401
+        # RUF100 is caused by https://github.com/astral-sh/ruff/issues/60
+        import dandiapi.api.checks  # noqa: F401, RUF100
         import dandiapi.api.signals  # noqa: F401
 
         if hasattr(settings, 'SENTRY_DSN'):
diff --git a/dandiapi/api/checks.py b/dandiapi/api/checks.py
index f53861126..a3339490e 100644
--- a/dandiapi/api/checks.py
+++ b/dandiapi/api/checks.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.conf import settings
 from django.core.checks import Error, register
 
diff --git a/dandiapi/api/doi.py b/dandiapi/api/doi.py
index 0a549edc4..92f272d54 100644
--- a/dandiapi/api/doi.py
+++ b/dandiapi/api/doi.py
@@ -1,9 +1,13 @@
+from __future__ import annotations
+
 import logging
+from typing import TYPE_CHECKING
 
 from django.conf import settings
 import requests
 
-from dandiapi.api.models import Version
+if TYPE_CHECKING:
+    from dandiapi.api.models import Version
 
 # All of the required DOI configuration settings
 DANDI_DOI_SETTINGS = [
diff --git a/dandiapi/api/garbage.py b/dandiapi/api/garbage.py
index 6efae1ecd..9ca9f48b7 100644
--- a/dandiapi/api/garbage.py
+++ b/dandiapi/api/garbage.py
@@ -1,11 +1,16 @@
+from __future__ import annotations
+
 from datetime import timedelta
+from typing import TYPE_CHECKING
 
 from django.db.models import Exists, OuterRef
-from django.db.models.query import QuerySet
 from django.utils import timezone
 
 from dandiapi.api.models import Asset, Version
 
+if TYPE_CHECKING:
+    from django.db.models.query import QuerySet
+
 # How long after the last modification things are eligible for deletion
 STALE_TIME_INTERVAL = timedelta(days=7)
 
diff --git a/dandiapi/api/mail.py b/dandiapi/api/mail.py
index a85389136..d786b3201 100644
--- a/dandiapi/api/mail.py
+++ b/dandiapi/api/mail.py
@@ -1,14 +1,18 @@
 from __future__ import annotations
 
-from collections.abc import Iterable
 import logging
+from typing import TYPE_CHECKING
 
-from allauth.socialaccount.models import SocialAccount
 from django.conf import settings
-from django.contrib.auth.models import User
 from django.core import mail
 from django.template.loader import render_to_string
 
+if TYPE_CHECKING:
+    from collections.abc import Iterable
+
+    from allauth.socialaccount.models import SocialAccount
+    from django.contrib.auth.models import User
+
 logger = logging.getLogger(__name__)
 
 BASE_RENDER_CONTEXT = {
diff --git a/dandiapi/api/management/commands/cleanup_blobs.py b/dandiapi/api/management/commands/cleanup_blobs.py
index bec0976f7..4051616f8 100644
--- a/dandiapi/api/management/commands/cleanup_blobs.py
+++ b/dandiapi/api/management/commands/cleanup_blobs.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.conf import settings
 import djclick as click
 from storages.backends.s3 import S3Storage
diff --git a/dandiapi/api/management/commands/collect_garbage.py b/dandiapi/api/management/commands/collect_garbage.py
index a2878363f..51bf64249 100644
--- a/dandiapi/api/management/commands/collect_garbage.py
+++ b/dandiapi/api/management/commands/collect_garbage.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import djclick as click
 
 from dandiapi.api.garbage import stale_assets
diff --git a/dandiapi/api/management/commands/create_dev_dandiset.py b/dandiapi/api/management/commands/create_dev_dandiset.py
index a07bfdc40..a2819c2cb 100644
--- a/dandiapi/api/management/commands/create_dev_dandiset.py
+++ b/dandiapi/api/management/commands/create_dev_dandiset.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from uuid import uuid4
 
 from django.conf import settings
diff --git a/dandiapi/api/management/commands/depose_placeholder.py b/dandiapi/api/management/commands/depose_placeholder.py
index 8b1c9501a..651916218 100644
--- a/dandiapi/api/management/commands/depose_placeholder.py
+++ b/dandiapi/api/management/commands/depose_placeholder.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.contrib.auth.models import User
 import djclick as click
 
diff --git a/dandiapi/api/management/commands/depose_placeholders.py b/dandiapi/api/management/commands/depose_placeholders.py
index 8fa80c923..1fd7d5cfd 100644
--- a/dandiapi/api/management/commands/depose_placeholders.py
+++ b/dandiapi/api/management/commands/depose_placeholders.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.contrib.auth.models import User
 import djclick as click
 
diff --git a/dandiapi/api/management/commands/ingest_asset_paths.py b/dandiapi/api/management/commands/ingest_asset_paths.py
index 42c99fa0f..ae3fe0a54 100644
--- a/dandiapi/api/management/commands/ingest_asset_paths.py
+++ b/dandiapi/api/management/commands/ingest_asset_paths.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import djclick as click
 
 from dandiapi.api.asset_paths import add_version_asset_paths
diff --git a/dandiapi/api/management/commands/list_placeholders.py b/dandiapi/api/management/commands/list_placeholders.py
index b85ef42a2..86f462af7 100644
--- a/dandiapi/api/management/commands/list_placeholders.py
+++ b/dandiapi/api/management/commands/list_placeholders.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.contrib.auth.models import User
 import djclick as click
 
diff --git a/dandiapi/api/management/commands/migrate_published_version_metadata.py b/dandiapi/api/management/commands/migrate_published_version_metadata.py
index 6b331f951..df648acc4 100644
--- a/dandiapi/api/management/commands/migrate_published_version_metadata.py
+++ b/dandiapi/api/management/commands/migrate_published_version_metadata.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from difflib import ndiff
 from pprint import pformat
 
@@ -14,7 +16,8 @@
 @click.argument('to_version')
 def migrate_published_version_metadata(*, dandiset: str, published_version: str, to_version: str):
     click.echo(
-        f'Migrating published version {dandiset}/{published_version} metadata to version {to_version}'  # noqa: E501
+        f'Migrating published version {dandiset}/{published_version} '
+        f'metadata to version {to_version}'
     )
     version = Version.objects.exclude(version='draft').get(
         dandiset=dandiset, version=published_version
@@ -23,7 +26,7 @@ def migrate_published_version_metadata(*, dandiset: str, published_version: str,
 
     try:
         metanew = migrate(metadata, to_version=to_version, skip_validation=False)
-    except Exception as e:
+    except Exception as e:  # noqa: BLE001
         click.echo(f'Failed to migrate {dandiset}/{published_version}')
         click.echo(e)
         raise click.Abort from e
diff --git a/dandiapi/api/management/commands/migrate_version_metadata.py b/dandiapi/api/management/commands/migrate_version_metadata.py
index 89f91ce15..9b5417509 100644
--- a/dandiapi/api/management/commands/migrate_version_metadata.py
+++ b/dandiapi/api/management/commands/migrate_version_metadata.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from dandischema import migrate
 import djclick as click
 
@@ -15,7 +17,7 @@ def migrate_version_metadata(*, to_version: str):
 
         try:
             metanew = migrate(metadata, to_version=to_version, skip_validation=True)
-        except Exception as e:
+        except Exception as e:  # noqa: BLE001
             click.echo(f'Failed to migrate {version.dandiset.identifier}/{version.version}')
             click.echo(e)
             continue
diff --git a/dandiapi/api/management/commands/revalidate.py b/dandiapi/api/management/commands/revalidate.py
index 3c9008bb7..e324c8090 100644
--- a/dandiapi/api/management/commands/revalidate.py
+++ b/dandiapi/api/management/commands/revalidate.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import djclick as click
 
 from dandiapi.api.models import Asset, Version
diff --git a/dandiapi/api/manifests.py b/dandiapi/api/manifests.py
index 87c04adf4..a67403abe 100644
--- a/dandiapi/api/manifests.py
+++ b/dandiapi/api/manifests.py
@@ -1,6 +1,8 @@
+from __future__ import annotations
+
 from contextlib import contextmanager
 import tempfile
-from typing import IO, Any, Generator, Iterable
+from typing import IO, TYPE_CHECKING, Any
 from urllib.parse import urlparse, urlunparse
 
 from django.conf import settings
@@ -11,6 +13,9 @@
 from dandiapi.api.models import Asset, AssetBlob, Version
 from dandiapi.api.storage import create_s3_storage
 
+if TYPE_CHECKING:
+    from collections.abc import Generator, Iterable
+
 
 def _s3_url(path: str) -> str:
     """Turn an object path into a fully qualified S3 URL."""
@@ -68,7 +73,7 @@ def _streaming_file_upload(path: str) -> Generator[IO[bytes], None, None]:
 
         # Piggyback on the AssetBlob storage since we want to store manifests in the same bucket
         storage = AssetBlob.blob.field.storage
-        storage._save(path, File(outfile))
+        storage._save(path, File(outfile))  # noqa: SLF001
 
 
 def _yaml_dump_sequence_from_generator(stream: IO[bytes], generator: Iterable[Any]) -> None:
diff --git a/dandiapi/api/migrations/0001_initial_v2.py b/dandiapi/api/migrations/0001_initial_v2.py
index c7e66029a..351eb82aa 100644
--- a/dandiapi/api/migrations/0001_initial_v2.py
+++ b/dandiapi/api/migrations/0001_initial_v2.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import uuid
 
 from django.conf import settings
diff --git a/dandiapi/api/migrations/0001_stagingapplication.py b/dandiapi/api/migrations/0001_stagingapplication.py
index fba013cfa..86953d76b 100644
--- a/dandiapi/api/migrations/0001_stagingapplication.py
+++ b/dandiapi/api/migrations/0001_stagingapplication.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.conf import settings
 from django.db import migrations, models
 import django.db.models.deletion
diff --git a/dandiapi/api/migrations/0002_asset_zarr.py b/dandiapi/api/migrations/0002_asset_zarr.py
index 6c8f5371e..49f2f2186 100644
--- a/dandiapi/api/migrations/0002_asset_zarr.py
+++ b/dandiapi/api/migrations/0002_asset_zarr.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.db import migrations, models
 import django.db.models.deletion
 
diff --git a/dandiapi/api/migrations/0003_default_oauth_application.py b/dandiapi/api/migrations/0003_default_oauth_application.py
index 3c1414d8d..fb65f036c 100644
--- a/dandiapi/api/migrations/0003_default_oauth_application.py
+++ b/dandiapi/api/migrations/0003_default_oauth_application.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.db import migrations
 from django.db.models import Q
 from oauth2_provider.settings import oauth2_settings
diff --git a/dandiapi/api/migrations/0004_merge.py b/dandiapi/api/migrations/0004_merge.py
index 5a1f3336a..56e2312ce 100644
--- a/dandiapi/api/migrations/0004_merge.py
+++ b/dandiapi/api/migrations/0004_merge.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.db import migrations
 
 
diff --git a/dandiapi/api/migrations/0005_null_charfield.py b/dandiapi/api/migrations/0005_null_charfield.py
new file mode 100644
index 000000000..f5341b658
--- /dev/null
+++ b/dandiapi/api/migrations/0005_null_charfield.py
@@ -0,0 +1,65 @@
+# Generated by Django 4.1.13 on 2023-11-11 04:25
+from __future__ import annotations
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('api', '0004_merge'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='assetblob',
+            name='sha256',
+            field=models.CharField(
+                blank=True,
+                default=None,
+                max_length=64,
+                null=True,
+                validators=[django.core.validators.RegexValidator('^[0-9a-f]{64}$')],
+            ),
+        ),
+        migrations.AlterField(
+            model_name='embargoedassetblob',
+            name='sha256',
+            field=models.CharField(
+                blank=True,
+                default=None,
+                max_length=64,
+                null=True,
+                validators=[django.core.validators.RegexValidator('^[0-9a-f]{64}$')],
+            ),
+        ),
+        migrations.AlterField(
+            model_name='embargoedupload',
+            name='etag',
+            field=models.CharField(
+                blank=True,
+                db_index=True,
+                default=None,
+                max_length=40,
+                null=True,
+                validators=[django.core.validators.RegexValidator('^[0-9a-f]{32}(-[1-9][0-9]*)?$')],
+            ),
+        ),
+        migrations.AlterField(
+            model_name='upload',
+            name='etag',
+            field=models.CharField(
+                blank=True,
+                db_index=True,
+                default=None,
+                max_length=40,
+                null=True,
+                validators=[django.core.validators.RegexValidator('^[0-9a-f]{32}(-[1-9][0-9]*)?$')],
+            ),
+        ),
+        migrations.AlterField(
+            model_name='version',
+            name='doi',
+            field=models.CharField(blank=True, default=None, max_length=64, null=True),
+        ),
+    ]
diff --git a/dandiapi/api/models/__init__.py b/dandiapi/api/models/__init__.py
index c3eb3fc44..fdc3bd2b5 100644
--- a/dandiapi/api/models/__init__.py
+++ b/dandiapi/api/models/__init__.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from .asset import Asset, AssetBlob, EmbargoedAssetBlob
 from .asset_paths import AssetPath, AssetPathRelation
 from .dandiset import Dandiset
diff --git a/dandiapi/api/models/asset.py b/dandiapi/api/models/asset.py
index a61ff99b7..b967d9b5c 100644
--- a/dandiapi/api/models/asset.py
+++ b/dandiapi/api/models/asset.py
@@ -27,7 +27,7 @@
 from .version import Version
 
 ASSET_CHARS_REGEX = r'[A-z0-9(),&\s#+~_=-]'
-ASSET_PATH_REGEX = fr'^({ASSET_CHARS_REGEX}?\/?\.?{ASSET_CHARS_REGEX})+$'
+ASSET_PATH_REGEX = rf'^({ASSET_CHARS_REGEX}?\/?\.?{ASSET_CHARS_REGEX})+$'
 ASSET_COMPUTED_FIELDS = [
     'id',
     'path',
@@ -58,8 +58,9 @@ class BaseAssetBlob(TimeStampedModel):
     ETAG_REGEX = r'[0-9a-f]{32}(-[1-9][0-9]*)?'
 
     blob_id = models.UUIDField(unique=True)
-    sha256 = models.CharField(
+    sha256 = models.CharField(  # noqa: DJ001
         null=True,
+        default=None,
         blank=True,
         max_length=64,
         validators=[RegexValidator(f'^{SHA256_REGEX}$')],
diff --git a/dandiapi/api/models/metadata.py b/dandiapi/api/models/metadata.py
index 6a45d22b9..2aec442d5 100644
--- a/dandiapi/api/models/metadata.py
+++ b/dandiapi/api/models/metadata.py
@@ -1,6 +1,11 @@
-import datetime
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
 from uuid import uuid4
 
+if TYPE_CHECKING:
+    import datetime
+
 
 class PublishableMetadataMixin:
     def published_by(self, now: datetime.datetime):
diff --git a/dandiapi/api/models/oauth.py b/dandiapi/api/models/oauth.py
index 70bfec800..5493d92d2 100644
--- a/dandiapi/api/models/oauth.py
+++ b/dandiapi/api/models/oauth.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from fnmatch import fnmatch
 
 from django.core.exceptions import ValidationError
diff --git a/dandiapi/api/models/upload.py b/dandiapi/api/models/upload.py
index a5b3fac51..220e61b92 100644
--- a/dandiapi/api/models/upload.py
+++ b/dandiapi/api/models/upload.py
@@ -26,8 +26,9 @@ class BaseUpload(models.Model):
 
     # This is the key used to generate the object key, and the primary identifier for the upload.
     upload_id = models.UUIDField(unique=True, default=uuid4, db_index=True)
-    etag = models.CharField(
+    etag = models.CharField(  # noqa: DJ001
         null=True,
+        default=None,
         blank=True,
         max_length=40,
         validators=[RegexValidator(f'^{ETAG_REGEX}$')],
@@ -43,7 +44,7 @@ class Meta:
 
     @staticmethod
     @abstractmethod
-    def object_key(upload_id, *, dandiset: Dandiset):  # noqa: N805
+    def object_key(upload_id, *, dandiset: Dandiset):
         pass
 
     @classmethod
@@ -83,8 +84,11 @@ class Upload(BaseUpload):
     blob = models.FileField(blank=True, storage=get_storage, upload_to=get_storage_prefix)
     dandiset = models.ForeignKey(Dandiset, related_name='uploads', on_delete=models.CASCADE)
 
+    def __str__(self) -> str:
+        return self.upload_id
+
     @staticmethod
-    def object_key(upload_id, *, dandiset: Dandiset | None = None):
+    def object_key(upload_id, *, dandiset: Dandiset | None = None):  # noqa: ARG004
         upload_id = str(upload_id)
         return (
             f'{settings.DANDI_DANDISETS_BUCKET_PREFIX}'
@@ -109,6 +113,9 @@ class EmbargoedUpload(BaseUpload):
         Dandiset, related_name='embargoed_uploads', on_delete=models.CASCADE
     )
 
+    def __str__(self) -> str:
+        return self.upload_id
+
     @staticmethod
     def object_key(upload_id, *, dandiset: Dandiset):
         upload_id = str(upload_id)
diff --git a/dandiapi/api/models/user.py b/dandiapi/api/models/user.py
index cc90c2005..b3c324dae 100644
--- a/dandiapi/api/models/user.py
+++ b/dandiapi/api/models/user.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.contrib.auth.models import User
 from django.db import models
 from django_extensions.db.models import TimeStampedModel
diff --git a/dandiapi/api/models/version.py b/dandiapi/api/models/version.py
index 0cf3f728d..cac103586 100644
--- a/dandiapi/api/models/version.py
+++ b/dandiapi/api/models/version.py
@@ -36,7 +36,7 @@ class Status(models.TextChoices):
         max_length=13,
         validators=[RegexValidator(f'^{VERSION_REGEX}$')],
     )
-    doi = models.CharField(max_length=64, null=True, blank=True)
+    doi = models.CharField(max_length=64, null=True, default=None, blank=True)  # noqa: DJ001
     """Track the validation status of this version, without considering assets"""
     status = models.CharField(
         max_length=10,
@@ -185,7 +185,10 @@ def _populate_metadata(self):
             'version': self.version,
             'id': f'DANDI:{self.dandiset.identifier}/{self.version}',
             'repository': settings.DANDI_WEB_APP_URL,
-            'url': f'{settings.DANDI_WEB_APP_URL}/dandiset/{self.dandiset.identifier}/{self.version}',  # noqa
+            'url': (
+                f'{settings.DANDI_WEB_APP_URL}/dandiset/'
+                f'{self.dandiset.identifier}/{self.version}'
+            ),
             'dateCreated': self.dandiset.created.isoformat(),
         }
 
diff --git a/dandiapi/api/permissions.py b/dandiapi/api/permissions.py
index 5af54f7db..61b961b09 100644
--- a/dandiapi/api/permissions.py
+++ b/dandiapi/api/permissions.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from rest_framework.permissions import SAFE_METHODS, BasePermission, IsAuthenticated
 
 from dandiapi.api.models.user import UserMetadata
diff --git a/dandiapi/api/services/asset/__init__.py b/dandiapi/api/services/asset/__init__.py
index d1b1a34ac..8cedcd739 100644
--- a/dandiapi/api/services/asset/__init__.py
+++ b/dandiapi/api/services/asset/__init__.py
@@ -1,3 +1,7 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
 from django.db import transaction
 
 from dandiapi.api.asset_paths import add_asset_paths, delete_asset_paths, get_conflicting_paths
@@ -10,7 +14,9 @@
     DraftDandisetNotModifiableError,
     ZarrArchiveBelongsToDifferentDandisetError,
 )
-from dandiapi.zarr.models import ZarrArchive
+
+if TYPE_CHECKING:
+    from dandiapi.zarr.models import ZarrArchive
 
 
 def _create_asset(
@@ -37,7 +43,7 @@ def _create_asset(
     return asset
 
 
-def change_asset(
+def change_asset(  # noqa: PLR0913
     *,
     user,
     asset: Asset,
@@ -134,7 +140,7 @@ def add_asset_to_version(
         asset_blob = None
     else:
         embargoed_asset_blob = None
-        asset_blob = asset_blob
+        asset_blob = asset_blob  # noqa: PLW0127
 
     with transaction.atomic():
         asset = _create_asset(
diff --git a/dandiapi/api/services/asset/exceptions.py b/dandiapi/api/services/asset/exceptions.py
index 0bd06d91d..3c6413fc9 100644
--- a/dandiapi/api/services/asset/exceptions.py
+++ b/dandiapi/api/services/asset/exceptions.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from rest_framework import status
 
 from dandiapi.api.services.exceptions import DandiError
diff --git a/dandiapi/api/services/dandiset/__init__.py b/dandiapi/api/services/dandiset/__init__.py
index 32a8d31b9..0cf80d82c 100644
--- a/dandiapi/api/services/dandiset/__init__.py
+++ b/dandiapi/api/services/dandiset/__init__.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.db import transaction
 
 from dandiapi.api.models.dandiset import Dandiset
diff --git a/dandiapi/api/services/dandiset/exceptions.py b/dandiapi/api/services/dandiset/exceptions.py
index c5df12e27..a71088c1b 100644
--- a/dandiapi/api/services/dandiset/exceptions.py
+++ b/dandiapi/api/services/dandiset/exceptions.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from rest_framework import status
 
 from dandiapi.api.services.exceptions import DandiError
@@ -7,7 +9,7 @@ class DandisetAlreadyExistsError(DandiError):
     http_status_code = status.HTTP_400_BAD_REQUEST
 
 
-class UnauthorizedEmbargoAccess(DandiError):
+class UnauthorizedEmbargoAccessError(DandiError):
     http_status_code = status.HTTP_401_UNAUTHORIZED
     message = (
         'Authentication credentials must be provided when attempting to access embargoed dandisets'
diff --git a/dandiapi/api/services/embargo/__init__.py b/dandiapi/api/services/embargo/__init__.py
index 05b6cf4a2..9b3e4425b 100644
--- a/dandiapi/api/services/embargo/__init__.py
+++ b/dandiapi/api/services/embargo/__init__.py
@@ -1,6 +1,8 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
 from django.conf import settings
-from django.contrib.auth.models import User
-from django.db.models import QuerySet
 
 from dandiapi.api.copy import copy_object_multipart
 from dandiapi.api.models import Asset, AssetBlob, Dandiset, Upload, Version
@@ -9,6 +11,10 @@
 
 from .exceptions import AssetNotEmbargoedError, DandisetNotEmbargoedError
 
+if TYPE_CHECKING:
+    from django.contrib.auth.models import User
+    from django.db.models import QuerySet
+
 
 def _unembargo_asset(asset: Asset):
     """Unembargo an asset by copying its blob to the public bucket."""
diff --git a/dandiapi/api/services/embargo/exceptions.py b/dandiapi/api/services/embargo/exceptions.py
index 1955b49d6..736dedfb7 100644
--- a/dandiapi/api/services/embargo/exceptions.py
+++ b/dandiapi/api/services/embargo/exceptions.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from rest_framework import status
 
 from dandiapi.api.services.exceptions import DandiError
diff --git a/dandiapi/api/services/exceptions.py b/dandiapi/api/services/exceptions.py
index 777dc432e..386869c13 100644
--- a/dandiapi/api/services/exceptions.py
+++ b/dandiapi/api/services/exceptions.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from rest_framework import status
 
 
diff --git a/dandiapi/api/services/metadata/__init__.py b/dandiapi/api/services/metadata/__init__.py
index 2b05d01cb..022ee3379 100644
--- a/dandiapi/api/services/metadata/__init__.py
+++ b/dandiapi/api/services/metadata/__init__.py
@@ -1,19 +1,25 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
 from celery.utils.log import get_task_logger
 import dandischema.exceptions
 from dandischema.metadata import aggregate_assets_summary, validate
 from django.conf import settings
 from django.db import transaction
 from django.utils import timezone
-import jsonschema.exceptions
 
 from dandiapi.api.models import Asset, Version
 from dandiapi.api.services.metadata.exceptions import (
     AssetHasBeenPublishedError,
     VersionHasBeenPublishedError,
-    VersionMetadataConcurrentlyModified,
+    VersionMetadataConcurrentlyModifiedError,
 )
 from dandiapi.api.services.publish import _build_publishable_version_from_draft
 
+if TYPE_CHECKING:
+    import jsonschema.exceptions
+
 logger = get_task_logger(__name__)
 
 
@@ -96,7 +102,7 @@ def version_aggregate_assets_summary(version: Version) -> None:
     )
     if updated_count == 0:
         logger.info('Skipped updating assetsSummary for version %s', version.id)
-        raise VersionMetadataConcurrentlyModified
+        raise VersionMetadataConcurrentlyModifiedError
 
 
 def validate_version_metadata(*, version: Version) -> None:
@@ -110,10 +116,11 @@ def _build_validatable_version_metadata(version: Version) -> dict:
 
         metadata_for_validation[
             'id'
-        ] = f'DANDI:{publishable_version.dandiset.identifier}/{publishable_version.version}'  # noqa
-        metadata_for_validation[
-            'url'
-        ] = f'{settings.DANDI_WEB_APP_URL}/dandiset/{publishable_version.dandiset.identifier}/{publishable_version.version}'  # noqa
+        ] = f'DANDI:{publishable_version.dandiset.identifier}/{publishable_version.version}'
+        metadata_for_validation['url'] = (
+            f'{settings.DANDI_WEB_APP_URL}/dandiset/'
+            f'{publishable_version.dandiset.identifier}/{publishable_version.version}'
+        )
         metadata_for_validation['doi'] = '10.80507/dandi.123456/0.123456.1234'
         metadata_for_validation['assetsSummary'] = {
             'schemaKey': 'AssetsSummary',
diff --git a/dandiapi/api/services/metadata/exceptions.py b/dandiapi/api/services/metadata/exceptions.py
index 012b81842..1aeb365f0 100644
--- a/dandiapi/api/services/metadata/exceptions.py
+++ b/dandiapi/api/services/metadata/exceptions.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from rest_framework import status
 
 from dandiapi.api.services.exceptions import DandiError
@@ -13,6 +15,6 @@ class VersionHasBeenPublishedError(DandiError):
     message = 'This version has been published and cannot be modified.'
 
 
-class VersionMetadataConcurrentlyModified(DandiError):
+class VersionMetadataConcurrentlyModifiedError(DandiError):
     http_status_code = status.HTTP_500_INTERNAL_SERVER_ERROR
     message = 'The metadata for this version has been modified since the request began.'
diff --git a/dandiapi/api/services/publish/__init__.py b/dandiapi/api/services/publish/__init__.py
index 289e5de1e..a41ead487 100644
--- a/dandiapi/api/services/publish/__init__.py
+++ b/dandiapi/api/services/publish/__init__.py
@@ -1,9 +1,10 @@
+from __future__ import annotations
+
 import datetime
+from typing import TYPE_CHECKING
 
 from dandischema.metadata import aggregate_assets_summary, validate
-from django.contrib.auth.models import User
 from django.db import transaction
-from django.db.models import QuerySet
 from more_itertools import ichunked
 
 from dandiapi.api import doi
@@ -20,6 +21,10 @@
 )
 from dandiapi.api.tasks import write_manifest_files
 
+if TYPE_CHECKING:
+    from django.contrib.auth.models import User
+    from django.db.models import QuerySet
+
 
 def publish_asset(*, asset: Asset) -> None:
     with transaction.atomic():
@@ -120,7 +125,7 @@ def _publish_dandiset(dandiset_id: int) -> None:
         new_version.save()
 
         # Bulk create the join table rows to optimize linking assets to new_version
-        AssetVersions = Version.assets.through
+        AssetVersions = Version.assets.through  # noqa: N806
 
         # Add a new many-to-many association directly to any already published assets
         already_published_assets: QuerySet[Asset] = old_version.assets.filter(published=True)
diff --git a/dandiapi/api/services/publish/exceptions.py b/dandiapi/api/services/publish/exceptions.py
index a0a3cb95f..f2310d9c1 100644
--- a/dandiapi/api/services/publish/exceptions.py
+++ b/dandiapi/api/services/publish/exceptions.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from rest_framework import status
 
 from dandiapi.api.services.exceptions import DandiError
diff --git a/dandiapi/api/services/version/metadata.py b/dandiapi/api/services/version/metadata.py
index 576540a25..ed3f10011 100644
--- a/dandiapi/api/services/version/metadata.py
+++ b/dandiapi/api/services/version/metadata.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from dandischema.models import Dandiset as PydanticDandiset
 from django.conf import settings
 
diff --git a/dandiapi/api/signals.py b/dandiapi/api/signals.py
index 1eed71f00..095a03117 100644
--- a/dandiapi/api/signals.py
+++ b/dandiapi/api/signals.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from allauth.account.signals import user_signed_up
 from corsheaders.signals import check_request_enabled
 from django.conf import settings
diff --git a/dandiapi/api/storage.py b/dandiapi/api/storage.py
index 64a4f12d6..ff0de3702 100644
--- a/dandiapi/api/storage.py
+++ b/dandiapi/api/storage.py
@@ -1,9 +1,8 @@
 from __future__ import annotations
 
-from collections.abc import Iterator
 from datetime import timedelta
 import hashlib
-from typing import Any
+from typing import TYPE_CHECKING, Any
 from urllib.parse import urlsplit, urlunsplit
 
 import boto3
@@ -19,6 +18,9 @@
 from s3_file_field._multipart_s3 import S3MultipartManager
 from storages.backends.s3 import S3Storage
 
+if TYPE_CHECKING:
+    from collections.abc import Iterator
+
 
 class ChecksumCalculatorFile:
     """File-like object that calculates the checksum of everything written to it."""
@@ -61,7 +63,7 @@ class DandiMinioMultipartManager(DandiMultipartMixin, MinioMultipartManager):
     """A custom multipart manager for passing ACL information."""
 
     def _create_upload_id(self, object_key: str, content_type: str) -> str:
-        return self._client._create_multipart_upload(
+        return self._client._create_multipart_upload(  # noqa: SLF001
             bucket_name=self._bucket_name,
             object_name=object_key,
             headers={
@@ -312,9 +314,9 @@ def get_boto_client(storage: Storage | None = None):
 def get_storage_params(storage: Storage):
     if isinstance(storage, MinioStorage):
         return {
-            'endpoint_url': storage.client._base_url._url.geturl(),
-            'access_key': storage.client._provider.retrieve().access_key,
-            'secret_key': storage.client._provider.retrieve().secret_key,
+            'endpoint_url': storage.client._base_url._url.geturl(),  # noqa: SLF001
+            'access_key': storage.client._provider.retrieve().access_key,  # noqa: SLF001
+            'secret_key': storage.client._provider.retrieve().secret_key,  # noqa: SLF001
         }
 
     return {
diff --git a/dandiapi/api/tasks/__init__.py b/dandiapi/api/tasks/__init__.py
index 5332da639..80f8ef87c 100644
--- a/dandiapi/api/tasks/__init__.py
+++ b/dandiapi/api/tasks/__init__.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from celery import shared_task
 from celery.utils.log import get_task_logger
 
diff --git a/dandiapi/api/tasks/scheduled.py b/dandiapi/api/tasks/scheduled.py
index f2402b915..e1cff81b7 100644
--- a/dandiapi/api/tasks/scheduled.py
+++ b/dandiapi/api/tasks/scheduled.py
@@ -3,12 +3,13 @@
 
 This module is imported from celery.py in a post-app-load hook.
 """
-from collections.abc import Iterable
+from __future__ import annotations
+
 from datetime import timedelta
 import time
+from typing import TYPE_CHECKING
 
 from celery import shared_task
-from celery.app.base import Celery
 from celery.schedules import crontab
 from celery.utils.log import get_task_logger
 from django.conf import settings
@@ -21,7 +22,7 @@
 from dandiapi.api.models import UserMetadata, Version
 from dandiapi.api.models.asset import Asset
 from dandiapi.api.services.metadata import version_aggregate_assets_summary
-from dandiapi.api.services.metadata.exceptions import VersionMetadataConcurrentlyModified
+from dandiapi.api.services.metadata.exceptions import VersionMetadataConcurrentlyModifiedError
 from dandiapi.api.tasks import (
     validate_asset_metadata_task,
     validate_version_metadata_task,
@@ -29,6 +30,11 @@
 )
 from dandiapi.zarr.models import ZarrArchiveStatus
 
+if TYPE_CHECKING:
+    from collections.abc import Iterable
+
+    from celery.app.base import Celery
+
 logger = get_task_logger(__name__)
 
 
@@ -46,7 +52,7 @@ def throttled_iterator(iterable: Iterable, max_per_second: int = 100) -> Iterabl
 
 @shared_task(
     soft_time_limit=60,
-    autoretry_for=(VersionMetadataConcurrentlyModified,),
+    autoretry_for=(VersionMetadataConcurrentlyModifiedError,),
     retry_backoff=True,
 )
 def aggregate_assets_summary_task(version_id: int):
diff --git a/dandiapi/api/tests/factories.py b/dandiapi/api/tests/factories.py
index d8451c38d..c0626d2be 100644
--- a/dandiapi/api/tests/factories.py
+++ b/dandiapi/api/tests/factories.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import datetime
 import hashlib
 
diff --git a/dandiapi/api/tests/fuzzy.py b/dandiapi/api/tests/fuzzy.py
index 0b95e458e..739f9872b 100644
--- a/dandiapi/api/tests/fuzzy.py
+++ b/dandiapi/api/tests/fuzzy.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import re
 
 
diff --git a/dandiapi/api/tests/test_asset.py b/dandiapi/api/tests/test_asset.py
index 23fda2f4a..f1f18ccb3 100644
--- a/dandiapi/api/tests/test_asset.py
+++ b/dandiapi/api/tests/test_asset.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import json
 import os.path
 from uuid import uuid4
@@ -197,7 +199,7 @@ def test_asset_full_metadata(draft_asset_factory):
         'contentUrl': [download_url, blob_url],
         'contentSize': asset.blob.size,
         'digest': asset.blob.digest,
-        '@context': f'https://raw.githubusercontent.com/dandi/schema/master/releases/{settings.DANDI_SCHEMA_VERSION}/context.json',  # noqa: E501
+        '@context': f'https://raw.githubusercontent.com/dandi/schema/master/releases/{settings.DANDI_SCHEMA_VERSION}/context.json',
     }
 
 
@@ -225,7 +227,7 @@ def test_asset_full_metadata_zarr(draft_asset_factory, zarr_archive):
         'digest': asset.digest,
         # This should be injected on all zarr assets
         'encodingFormat': 'application/x-zarr',
-        '@context': f'https://raw.githubusercontent.com/dandi/schema/master/releases/{settings.DANDI_SCHEMA_VERSION}/context.json',  # noqa: E501
+        '@context': f'https://raw.githubusercontent.com/dandi/schema/master/releases/{settings.DANDI_SCHEMA_VERSION}/context.json',
     }
 
 
diff --git a/dandiapi/api/tests/test_asset_paths.py b/dandiapi/api/tests/test_asset_paths.py
index 00fb41ea2..3d8f5b1ff 100644
--- a/dandiapi/api/tests/test_asset_paths.py
+++ b/dandiapi/api/tests/test_asset_paths.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.db.models import Q, QuerySet
 import pytest
 
diff --git a/dandiapi/api/tests/test_auth.py b/dandiapi/api/tests/test_auth.py
index 354a7f56d..24cd3a9f5 100644
--- a/dandiapi/api/tests/test_auth.py
+++ b/dandiapi/api/tests/test_auth.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import pytest
 from rest_framework.authtoken.models import Token
 
diff --git a/dandiapi/api/tests/test_checksum.py b/dandiapi/api/tests/test_checksum.py
index df83bc1e5..15236ee0d 100644
--- a/dandiapi/api/tests/test_checksum.py
+++ b/dandiapi/api/tests/test_checksum.py
@@ -1,7 +1,12 @@
+from __future__ import annotations
+
 import hashlib
+from typing import TYPE_CHECKING
 
 from django.core.files.base import ContentFile
-from django.core.files.storage import Storage
+
+if TYPE_CHECKING:
+    from django.core.files.storage import Storage
 
 
 def test_checksum(faker, storage: Storage):
diff --git a/dandiapi/api/tests/test_create_dev_dandiset.py b/dandiapi/api/tests/test_create_dev_dandiset.py
index 5af53da92..6a738bf50 100644
--- a/dandiapi/api/tests/test_create_dev_dandiset.py
+++ b/dandiapi/api/tests/test_create_dev_dandiset.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import pytest
 
 from dandiapi.api.management.commands.create_dev_dandiset import create_dev_dandiset
diff --git a/dandiapi/api/tests/test_dandiset.py b/dandiapi/api/tests/test_dandiset.py
index 5b0cabb38..5495b97d4 100644
--- a/dandiapi/api/tests/test_dandiset.py
+++ b/dandiapi/api/tests/test_dandiset.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import datetime
 
 from django.conf import settings
@@ -375,7 +377,7 @@ def test_dandiset_rest_create(api_client, user):
     assert dandiset.draft_version.metadata == {
         **metadata,
         'manifestLocation': [
-            f'{settings.DANDI_API_URL}/api/dandisets/{dandiset.identifier}/versions/draft/assets/'  # noqa: E501
+            f'{settings.DANDI_API_URL}/api/dandisets/{dandiset.identifier}/versions/draft/assets/'
         ],
         'name': name,
         'identifier': DANDISET_SCHEMA_ID_RE,
@@ -387,7 +389,7 @@ def test_dandiset_rest_create(api_client, user):
             f'{user.last_name}, {user.first_name} ({year}) {name} '
             f'(Version draft) [Data set]. DANDI archive. {url}'
         ),
-        '@context': f'https://raw.githubusercontent.com/dandi/schema/master/releases/{settings.DANDI_SCHEMA_VERSION}/context.json',  # noqa: E501
+        '@context': f'https://raw.githubusercontent.com/dandi/schema/master/releases/{settings.DANDI_SCHEMA_VERSION}/context.json',
         'schemaVersion': settings.DANDI_SCHEMA_VERSION,
         'schemaKey': 'Dandiset',
         'access': [{'schemaKey': 'AccessRequirements', 'status': 'dandi:OpenAccess'}],
@@ -468,7 +470,7 @@ def test_dandiset_rest_create_with_identifier(api_client, admin_user):
     assert dandiset.draft_version.metadata == {
         **metadata,
         'manifestLocation': [
-            f'{settings.DANDI_API_URL}/api/dandisets/{dandiset.identifier}/versions/draft/assets/'  # noqa: E501
+            f'{settings.DANDI_API_URL}/api/dandisets/{dandiset.identifier}/versions/draft/assets/'
         ],
         'name': name,
         'identifier': f'DANDI:{identifier}',
@@ -480,7 +482,7 @@ def test_dandiset_rest_create_with_identifier(api_client, admin_user):
             f'{admin_user.last_name}, {admin_user.first_name} ({year}) {name} '
             f'(Version draft) [Data set]. DANDI archive. {url}'
         ),
-        '@context': f'https://raw.githubusercontent.com/dandi/schema/master/releases/{settings.DANDI_SCHEMA_VERSION}/context.json',  # noqa: E501
+        '@context': f'https://raw.githubusercontent.com/dandi/schema/master/releases/{settings.DANDI_SCHEMA_VERSION}/context.json',
         'schemaVersion': settings.DANDI_SCHEMA_VERSION,
         'schemaKey': 'Dandiset',
         'access': [{'schemaKey': 'AccessRequirements', 'status': 'dandi:OpenAccess'}],
@@ -575,7 +577,7 @@ def test_dandiset_rest_create_with_contributor(api_client, admin_user):
     assert dandiset.draft_version.metadata == {
         **metadata,
         'manifestLocation': [
-            f'{settings.DANDI_API_URL}/api/dandisets/{dandiset.identifier}/versions/draft/assets/'  # noqa: E501
+            f'{settings.DANDI_API_URL}/api/dandisets/{dandiset.identifier}/versions/draft/assets/'
         ],
         'name': name,
         'identifier': f'DANDI:{identifier}',
@@ -586,7 +588,7 @@ def test_dandiset_rest_create_with_contributor(api_client, admin_user):
         'citation': (
             f'Jane Doe ({year}) {name} ' f'(Version draft) [Data set]. DANDI archive. {url}'
         ),
-        '@context': f'https://raw.githubusercontent.com/dandi/schema/master/releases/{settings.DANDI_SCHEMA_VERSION}/context.json',  # noqa: E501
+        '@context': f'https://raw.githubusercontent.com/dandi/schema/master/releases/{settings.DANDI_SCHEMA_VERSION}/context.json',
         'schemaVersion': settings.DANDI_SCHEMA_VERSION,
         'schemaKey': 'Dandiset',
         'access': [{'schemaKey': 'AccessRequirements', 'status': 'dandi:OpenAccess'}],
@@ -665,7 +667,7 @@ def test_dandiset_rest_create_embargoed(api_client, user):
     assert dandiset.draft_version.metadata == {
         **metadata,
         'manifestLocation': [
-            f'{settings.DANDI_API_URL}/api/dandisets/{dandiset.identifier}/versions/draft/assets/'  # noqa: E501
+            f'{settings.DANDI_API_URL}/api/dandisets/{dandiset.identifier}/versions/draft/assets/'
         ],
         'name': name,
         'identifier': DANDISET_SCHEMA_ID_RE,
@@ -677,7 +679,7 @@ def test_dandiset_rest_create_embargoed(api_client, user):
             f'{user.last_name}, {user.first_name} ({year}) {name} '
             f'(Version draft) [Data set]. DANDI archive. {url}'
         ),
-        '@context': f'https://raw.githubusercontent.com/dandi/schema/master/releases/{settings.DANDI_SCHEMA_VERSION}/context.json',  # noqa: E501
+        '@context': f'https://raw.githubusercontent.com/dandi/schema/master/releases/{settings.DANDI_SCHEMA_VERSION}/context.json',
         'schemaVersion': settings.DANDI_SCHEMA_VERSION,
         'schemaKey': 'Dandiset',
         'access': [{'schemaKey': 'AccessRequirements', 'status': 'dandi:EmbargoedAccess'}],
diff --git a/dandiapi/api/tests/test_embargo.py b/dandiapi/api/tests/test_embargo.py
index b6e911832..191733c8a 100644
--- a/dandiapi/api/tests/test_embargo.py
+++ b/dandiapi/api/tests/test_embargo.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import pytest
 
 from dandiapi.api.models import Dandiset
@@ -54,7 +56,7 @@ def embargo_status(request):
         ),
         (
             'get',
-            '/api/dandisets/{dandiset.identifier}/versions/draft/assets/{asset.asset_id}/validation/',  # noqa: E501
+            '/api/dandisets/{dandiset.identifier}/versions/draft/assets/{asset.asset_id}/validation/',
         ),
     ],
 )
diff --git a/dandiapi/api/tests/test_garbage.py b/dandiapi/api/tests/test_garbage.py
index 866e497b5..0a191cef9 100644
--- a/dandiapi/api/tests/test_garbage.py
+++ b/dandiapi/api/tests/test_garbage.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from datetime import timedelta
 
 from django.utils import timezone
diff --git a/dandiapi/api/tests/test_info.py b/dandiapi/api/tests/test_info.py
index f1eec871c..ce4c7eb0f 100644
--- a/dandiapi/api/tests/test_info.py
+++ b/dandiapi/api/tests/test_info.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.conf import settings
 
 from dandiapi import __version__
diff --git a/dandiapi/api/tests/test_manifests.py b/dandiapi/api/tests/test_manifests.py
index 9db4b6019..a148479f3 100644
--- a/dandiapi/api/tests/test_manifests.py
+++ b/dandiapi/api/tests/test_manifests.py
@@ -1,6 +1,9 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
 from django.conf import settings
 from django.core.files.base import ContentFile
-from django.core.files.storage import Storage
 import pytest
 from rest_framework.renderers import JSONRenderer
 from rest_framework_yaml.renderers import YAMLRenderer
@@ -14,6 +17,9 @@
 )
 from dandiapi.api.models import AssetBlob, Version
 
+if TYPE_CHECKING:
+    from django.core.files.storage import Storage
+
 
 @pytest.mark.django_db()
 def test_write_dandiset_jsonld(storage: Storage, version: Version):
diff --git a/dandiapi/api/tests/test_permission.py b/dandiapi/api/tests/test_permission.py
index 4f8b88196..14ea28dc2 100644
--- a/dandiapi/api/tests/test_permission.py
+++ b/dandiapi/api/tests/test_permission.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import pytest
 from rest_framework.permissions import SAFE_METHODS
 
@@ -54,7 +56,7 @@
         ),
         (
             'get',
-            '/api/dandisets/{dandiset.identifier}/versions/draft/assets/{asset.asset_id}/validation/',  # noqa: E501
+            '/api/dandisets/{dandiset.identifier}/versions/draft/assets/{asset.asset_id}/validation/',
             False,
         ),
         # Zarrs
diff --git a/dandiapi/api/tests/test_search.py b/dandiapi/api/tests/test_search.py
index edd334553..bd5511774 100644
--- a/dandiapi/api/tests/test_search.py
+++ b/dandiapi/api/tests/test_search.py
@@ -1,5 +1,11 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
 import pytest
-from rest_framework.test import APIClient
+
+if TYPE_CHECKING:
+    from rest_framework.test import APIClient
 
 
 @pytest.mark.django_db()
diff --git a/dandiapi/api/tests/test_stats.py b/dandiapi/api/tests/test_stats.py
index c4fffc759..5de16f0c8 100644
--- a/dandiapi/api/tests/test_stats.py
+++ b/dandiapi/api/tests/test_stats.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import pytest
 
 
diff --git a/dandiapi/api/tests/test_tasks.py b/dandiapi/api/tests/test_tasks.py
index d5dcb3056..15cdea730 100644
--- a/dandiapi/api/tests/test_tasks.py
+++ b/dandiapi/api/tests/test_tasks.py
@@ -1,18 +1,23 @@
+from __future__ import annotations
+
 import datetime
 import hashlib
+from typing import TYPE_CHECKING
 
 from django.conf import settings
-from django.contrib.auth.models import User
-from django.core.files.storage import Storage
 from guardian.shortcuts import assign_perm
 import pytest
-from rest_framework.test import APIClient
 
 from dandiapi.api import tasks
 from dandiapi.api.models import Asset, AssetBlob, EmbargoedAssetBlob, Version
 
 from .fuzzy import URN_RE, UTC_ISO_TIMESTAMP_RE
 
+if TYPE_CHECKING:
+    from django.contrib.auth.models import User
+    from django.core.files.storage import Storage
+    from rest_framework.test import APIClient
+
 
 @pytest.mark.django_db()
 def test_calculate_checksum_task(storage: Storage, asset_blob_factory):
@@ -317,7 +322,7 @@ def test_publish_task(
         },
         'datePublished': UTC_ISO_TIMESTAMP_RE,
         'manifestLocation': [
-            f'http://{settings.MINIO_STORAGE_ENDPOINT}/test-dandiapi-dandisets/test-prefix/dandisets/{draft_version.dandiset.identifier}/{published_version.version}/assets.yaml',  # noqa: E501
+            f'http://{settings.MINIO_STORAGE_ENDPOINT}/test-dandiapi-dandisets/test-prefix/dandisets/{draft_version.dandiset.identifier}/{published_version.version}/assets.yaml',
         ],
         'identifier': f'DANDI:{draft_version.dandiset.identifier}',
         'version': published_version.version,
diff --git a/dandiapi/api/tests/test_unembargo.py b/dandiapi/api/tests/test_unembargo.py
index b7177d112..8f98d4775 100644
--- a/dandiapi/api/tests/test_unembargo.py
+++ b/dandiapi/api/tests/test_unembargo.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import math
 import os
 
diff --git a/dandiapi/api/tests/test_upload.py b/dandiapi/api/tests/test_upload.py
index 764b0ff1b..6bd3abf49 100644
--- a/dandiapi/api/tests/test_upload.py
+++ b/dandiapi/api/tests/test_upload.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import os
 import uuid
 
@@ -175,9 +177,9 @@ def test_upload_initialize_embargo(api_client, user, dandiset_factory):
     assert not Upload.objects.all().exists()
     upload = EmbargoedUpload.objects.get(upload_id=resp.data['upload_id'])
     upload_id = str(upload.upload_id)
-    assert (
-        upload.blob.name
-        == f'test-embargo-prefix/{dandiset.identifier}/blobs/{upload_id[:3]}/{upload_id[3:6]}/{upload_id}'  # noqa: E501
+    assert upload.blob.name == (
+        f'test-embargo-prefix/{dandiset.identifier}/blobs/'
+        f'{upload_id[:3]}/{upload_id[3:6]}/{upload_id}'
     )
 
 
diff --git a/dandiapi/api/tests/test_users.py b/dandiapi/api/tests/test_users.py
index 35f698e48..feac3af91 100644
--- a/dandiapi/api/tests/test_users.py
+++ b/dandiapi/api/tests/test_users.py
@@ -1,24 +1,26 @@
 from __future__ import annotations
 
 import json
-from typing import Any
+from typing import TYPE_CHECKING, Any
 
-from allauth.socialaccount.models import SocialAccount
-from django.contrib.auth.models import User
-from django.core.mail.message import EmailMessage
-from django.test.client import Client
 from django.urls.base import reverse
 import pytest
 from pytest_django.asserts import assertContains
 from rest_framework.exceptions import ErrorDetail
-from rest_framework.response import Response
-from rest_framework.test import APIClient
 
 from dandiapi.api.mail import ADMIN_EMAIL
 from dandiapi.api.models import UserMetadata
 from dandiapi.api.views.auth import COLLECT_USER_NAME_QUESTIONS, NEW_USER_QUESTIONS, QUESTIONS
 from dandiapi.api.views.users import user_to_dict
 
+if TYPE_CHECKING:
+    from allauth.socialaccount.models import SocialAccount
+    from django.contrib.auth.models import User
+    from django.core.mail.message import EmailMessage
+    from django.test.client import Client
+    from rest_framework.response import Response
+    from rest_framework.test import APIClient
+
 
 def serialize_social_account(social_account):
     return {
diff --git a/dandiapi/api/tests/test_version.py b/dandiapi/api/tests/test_version.py
index 87ec5300c..142ebe23a 100644
--- a/dandiapi/api/tests/test_version.py
+++ b/dandiapi/api/tests/test_version.py
@@ -5,15 +5,15 @@
 from typing import TYPE_CHECKING
 
 from django.conf import settings
-from django.contrib.auth.models import User
 from freezegun import freeze_time
 from guardian.shortcuts import assign_perm
 import pytest
 
 from dandiapi.api.services.metadata import version_aggregate_assets_summary
-from dandiapi.api.services.metadata.exceptions import VersionMetadataConcurrentlyModified
+from dandiapi.api.services.metadata.exceptions import VersionMetadataConcurrentlyModifiedError
 
 if TYPE_CHECKING:
+    from django.contrib.auth.models import User
     from rest_framework.test import APIClient
 
 from dandiapi.api import tasks
@@ -72,7 +72,7 @@ def test_draft_version_metadata_computed(draft_version: Version):
     expected_metadata = {
         **original_metadata,
         'manifestLocation': [
-            f'{settings.DANDI_API_URL}/api/dandisets/{draft_version.dandiset.identifier}/versions/draft/assets/'  # noqa: E501
+            f'{settings.DANDI_API_URL}/api/dandisets/{draft_version.dandiset.identifier}/versions/draft/assets/'
         ],
         'name': draft_version.name,
         'identifier': f'DANDI:{draft_version.dandiset.identifier}',
@@ -84,7 +84,7 @@ def test_draft_version_metadata_computed(draft_version: Version):
         ),
         'repository': settings.DANDI_WEB_APP_URL,
         'dateCreated': draft_version.dandiset.created.isoformat(),
-        '@context': f'https://raw.githubusercontent.com/dandi/schema/master/releases/{settings.DANDI_SCHEMA_VERSION}/context.json',  # noqa: E501
+        '@context': f'https://raw.githubusercontent.com/dandi/schema/master/releases/{settings.DANDI_SCHEMA_VERSION}/context.json',
         'assetsSummary': {
             'numberOfBytes': 0,
             'numberOfFiles': 0,
@@ -117,14 +117,17 @@ def test_published_version_metadata_computed(published_version: Version):
         'identifier': f'DANDI:{published_version.dandiset.identifier}',
         'version': published_version.version,
         'id': f'DANDI:{published_version.dandiset.identifier}/{published_version.version}',
-        'doi': f'10.80507/dandi.{published_version.dandiset.identifier}/{published_version.version}',  # noqa: E501
+        'doi': (
+            f'10.80507/dandi.'
+            f'{published_version.dandiset.identifier}/{published_version.version}'
+        ),
         'url': (
             f'{settings.DANDI_WEB_APP_URL}/dandiset/'
             f'{published_version.dandiset.identifier}/{published_version.version}'
         ),
         'repository': settings.DANDI_WEB_APP_URL,
         'dateCreated': published_version.dandiset.created.isoformat(),
-        '@context': f'https://raw.githubusercontent.com/dandi/schema/master/releases/{settings.DANDI_SCHEMA_VERSION}/context.json',  # noqa: E501
+        '@context': f'https://raw.githubusercontent.com/dandi/schema/master/releases/{settings.DANDI_SCHEMA_VERSION}/context.json',
         'assetsSummary': {
             'numberOfBytes': 0,
             'numberOfFiles': 0,
@@ -140,10 +143,13 @@ def test_published_version_metadata_computed(published_version: Version):
 def test_version_metadata_citation_draft(draft_version):
     name = draft_version.metadata['name'].rstrip('.')
     year = datetime.datetime.now(datetime.UTC).year
-    url = f'{settings.DANDI_WEB_APP_URL}/dandiset/{draft_version.dandiset.identifier}/{draft_version.version}'  # noqa: E501
+    url = (
+        f'{settings.DANDI_WEB_APP_URL}/dandiset/'
+        f'{draft_version.dandiset.identifier}/{draft_version.version}'
+    )
     assert (
         draft_version.metadata['citation']
-        == f'{name} ({year}). (Version {draft_version.version}) [Data set]. DANDI archive. {url}'  # noqa: E501
+        == f'{name} ({year}). (Version {draft_version.version}) [Data set]. DANDI archive. {url}'
     )
 
 
@@ -152,9 +158,9 @@ def test_version_metadata_citation_published(published_version):
     name = published_version.metadata['name'].rstrip('.')
     year = datetime.datetime.now(datetime.UTC).year
     url = f'https://doi.org/{published_version.doi}'
-    assert (
-        published_version.metadata['citation']
-        == f'{name} ({year}). (Version {published_version.version}) [Data set]. DANDI archive. {url}'  # noqa: E501
+    assert published_version.metadata['citation'] == (
+        f'{name} ({year}). (Version {published_version.version}) [Data set]. '
+        f'DANDI archive. {url}'
     )
 
 
@@ -325,7 +331,7 @@ def test_version_publish_version(draft_version, asset):
         'dateCreated': UTC_ISO_TIMESTAMP_RE,
         'datePublished': UTC_ISO_TIMESTAMP_RE,
         'manifestLocation': [
-            f'http://{settings.MINIO_STORAGE_ENDPOINT}/test-dandiapi-dandisets/test-prefix/dandisets/{publish_version.dandiset.identifier}/{publish_version.version}/assets.yaml',  # noqa: E501
+            f'http://{settings.MINIO_STORAGE_ENDPOINT}/test-dandiapi-dandisets/test-prefix/dandisets/{publish_version.dandiset.identifier}/{publish_version.version}/assets.yaml',
         ],
         'identifier': f'DANDI:{publish_version.dandiset.identifier}',
         'version': publish_version.version,
@@ -370,7 +376,7 @@ def test_version_aggregate_assets_summary_metadata_modified(
 
     # Modify the metadata passed to the function so that it's mismatched
     version.metadata['foo'] = 'bar'
-    with pytest.raises(VersionMetadataConcurrentlyModified):
+    with pytest.raises(VersionMetadataConcurrentlyModifiedError):
         version_aggregate_assets_summary(version)
 
 
@@ -543,7 +549,7 @@ def test_version_rest_update(api_client, user, draft_version):
         **new_metadata,
         'schemaVersion': settings.DANDI_SCHEMA_VERSION,
         'manifestLocation': [
-            f'{settings.DANDI_API_URL}/api/dandisets/{draft_version.dandiset.identifier}/versions/draft/assets/'  # noqa: E501
+            f'{settings.DANDI_API_URL}/api/dandisets/{draft_version.dandiset.identifier}/versions/draft/assets/'
         ],
         'name': new_name,
         'identifier': f'DANDI:{draft_version.dandiset.identifier}',
diff --git a/dandiapi/api/user_migration.py b/dandiapi/api/user_migration.py
index 628039a92..51c804c16 100644
--- a/dandiapi/api/user_migration.py
+++ b/dandiapi/api/user_migration.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import logging
 
 from allauth.account.signals import user_logged_in
diff --git a/dandiapi/api/views/__init__.py b/dandiapi/api/views/__init__.py
index a38cefef3..7254ba465 100644
--- a/dandiapi/api/views/__init__.py
+++ b/dandiapi/api/views/__init__.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from .asset import AssetViewSet, NestedAssetViewSet
 from .auth import auth_token_view, authorize_view, user_questionnaire_form_view
 from .dandiset import DandisetViewSet
diff --git a/dandiapi/api/views/asset.py b/dandiapi/api/views/asset.py
index aed2815b2..8bb97b2cb 100644
--- a/dandiapi/api/views/asset.py
+++ b/dandiapi/api/views/asset.py
@@ -23,10 +23,10 @@
     MinioStorage = type('FakeMinioStorage', (), {})
 
 import os.path
+from typing import TYPE_CHECKING
 
 from django.conf import settings
 from django.db import transaction
-from django.db.models import QuerySet
 from django.http import HttpResponse, HttpResponseRedirect
 from django.utils.decorators import method_decorator
 from django_filters import rest_framework as filters
@@ -58,6 +58,9 @@
     AssetValidationSerializer,
 )
 
+if TYPE_CHECKING:
+    from django.db.models import QuerySet
+
 
 class AssetFilter(filters.FilterSet):
     path = filters.CharFilter(lookup_expr='istartswith')
diff --git a/dandiapi/api/views/auth.py b/dandiapi/api/views/auth.py
index b5cfcf611..a7884957d 100644
--- a/dandiapi/api/views/auth.py
+++ b/dandiapi/api/views/auth.py
@@ -2,11 +2,10 @@
 
 import json
 from json.decoder import JSONDecodeError
+from typing import TYPE_CHECKING
 
 from django.conf import settings
-from django.contrib.auth.models import User
 from django.db import transaction
-from django.http import HttpRequest, HttpResponse
 from django.http.response import Http404, HttpResponseBase, HttpResponseRedirect
 from django.shortcuts import get_object_or_404, render
 from django.urls import reverse
@@ -16,7 +15,6 @@
 from rest_framework.authtoken.models import Token
 from rest_framework.decorators import api_view, permission_classes
 from rest_framework.permissions import IsAuthenticated
-from rest_framework.request import Request
 from rest_framework.response import Response
 
 from dandiapi.api.mail import (
@@ -27,6 +25,11 @@
 from dandiapi.api.models import UserMetadata
 from dandiapi.api.permissions import IsApproved
 
+if TYPE_CHECKING:
+    from django.contrib.auth.models import User
+    from django.http import HttpRequest, HttpResponse
+    from rest_framework.request import Request
+
 
 @swagger_auto_schema(
     methods=['GET', 'POST'],
diff --git a/dandiapi/api/views/common.py b/dandiapi/api/views/common.py
index 44c8996fe..d1391aa63 100644
--- a/dandiapi/api/views/common.py
+++ b/dandiapi/api/views/common.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from drf_yasg import openapi
 from rest_framework.pagination import PageNumberPagination
 
diff --git a/dandiapi/api/views/dandiset.py b/dandiapi/api/views/dandiset.py
index 787836be0..040395aef 100644
--- a/dandiapi/api/views/dandiset.py
+++ b/dandiapi/api/views/dandiset.py
@@ -1,3 +1,7 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
 from allauth.socialaccount.models import SocialAccount
 from django.contrib.auth.models import User
 from django.db.models import Count, Max, OuterRef, Subquery, Sum
@@ -13,7 +17,6 @@
 from rest_framework.decorators import action
 from rest_framework.exceptions import NotAuthenticated, PermissionDenied
 from rest_framework.generics import get_object_or_404
-from rest_framework.request import Request
 from rest_framework.response import Response
 from rest_framework.serializers import ValidationError
 from rest_framework.viewsets import ReadOnlyModelViewSet
@@ -22,7 +25,7 @@
 from dandiapi.api.mail import send_ownership_change_emails
 from dandiapi.api.models import Dandiset, Version
 from dandiapi.api.services.dandiset import create_dandiset, delete_dandiset
-from dandiapi.api.services.dandiset.exceptions import UnauthorizedEmbargoAccess
+from dandiapi.api.services.dandiset.exceptions import UnauthorizedEmbargoAccessError
 from dandiapi.api.services.embargo import unembargo_dandiset
 from dandiapi.api.views.common import DANDISET_PK_PARAM, DandiPagination
 from dandiapi.api.views.serializers import (
@@ -37,6 +40,9 @@
 )
 from dandiapi.search.models import AssetSearch
 
+if TYPE_CHECKING:
+    from rest_framework.request import Request
+
 
 class DandisetFilterBackend(filters.OrderingFilter):
     ordering_fields = ['id', 'name', 'modified', 'size']
@@ -122,7 +128,7 @@ def get_queryset(self):
 
             # Return early if attempting to access embargoed data without authentication
             if show_embargoed and not self.request.user.is_authenticated:
-                raise UnauthorizedEmbargoAccess()
+                raise UnauthorizedEmbargoAccessError
 
             if not show_draft:
                 # Only include dandisets that have more than one version, i.e. published dandisets.
diff --git a/dandiapi/api/views/dashboard.py b/dandiapi/api/views/dashboard.py
index 642b0f9c5..6a595e086 100644
--- a/dandiapi/api/views/dashboard.py
+++ b/dandiapi/api/views/dashboard.py
@@ -1,4 +1,7 @@
-from allauth.socialaccount.models import SocialAccount
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
 from django.conf import settings
 from django.contrib.auth.mixins import LoginRequiredMixin, UserPassesTestMixin
 from django.contrib.auth.models import User
@@ -13,6 +16,9 @@
 from dandiapi.api.models import Asset, AssetBlob, Upload, UserMetadata, Version
 from dandiapi.api.views.users import social_account_to_dict
 
+if TYPE_CHECKING:
+    from allauth.socialaccount.models import SocialAccount
+
 
 class DashboardMixin(LoginRequiredMixin, UserPassesTestMixin):
     def test_func(self):
diff --git a/dandiapi/api/views/info.py b/dandiapi/api/views/info.py
index b6e4bd86c..5561a78a4 100644
--- a/dandiapi/api/views/info.py
+++ b/dandiapi/api/views/info.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.conf import settings
 from drf_yasg.utils import no_body, swagger_auto_schema
 from rest_framework import serializers
diff --git a/dandiapi/api/views/root.py b/dandiapi/api/views/root.py
index e68f011b8..b39da5311 100644
--- a/dandiapi/api/views/root.py
+++ b/dandiapi/api/views/root.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.conf import settings
 from django.shortcuts import render
 
diff --git a/dandiapi/api/views/serializers.py b/dandiapi/api/views/serializers.py
index f28a39fe8..c7b99f422 100644
--- a/dandiapi/api/views/serializers.py
+++ b/dandiapi/api/views/serializers.py
@@ -1,5 +1,6 @@
-from collections import OrderedDict
-from typing import Any
+from __future__ import annotations
+
+from typing import TYPE_CHECKING, Any
 
 from django.conf import settings
 from django.contrib.auth.validators import UnicodeUsernameValidator
@@ -10,6 +11,9 @@
 from dandiapi.api.models import Asset, AssetBlob, AssetPath, Dandiset, Version
 from dandiapi.search.models import AssetSearch
 
+if TYPE_CHECKING:
+    from collections import OrderedDict
+
 
 def extract_contact_person(version: Version) -> str:
     """Extract a version's contact person from its metadata."""
diff --git a/dandiapi/api/views/stats.py b/dandiapi/api/views/stats.py
index cf3c2a296..7175dd00d 100644
--- a/dandiapi/api/views/stats.py
+++ b/dandiapi/api/views/stats.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.contrib.auth.models import User
 from django.views.decorators.cache import cache_page
 from rest_framework.decorators import api_view
diff --git a/dandiapi/api/views/upload.py b/dandiapi/api/views/upload.py
index 89ba37be5..fb00f12e7 100644
--- a/dandiapi/api/views/upload.py
+++ b/dandiapi/api/views/upload.py
@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import logging
+from typing import TYPE_CHECKING
 
 from django.db import transaction
 from django.http.response import Http404, HttpResponseBase
@@ -11,7 +12,6 @@
 from rest_framework.decorators import api_view, parser_classes, permission_classes
 from rest_framework.exceptions import ValidationError
 from rest_framework.parsers import JSONParser
-from rest_framework.request import Request
 from rest_framework.response import Response
 from s3_file_field._multipart import TransferredPart, TransferredParts
 
@@ -21,6 +21,9 @@
 from dandiapi.api.tasks import calculate_sha256
 from dandiapi.api.views.serializers import AssetBlobSerializer
 
+if TYPE_CHECKING:
+    from rest_framework.request import Request
+
 supported_digests = {'dandi:dandi-etag': 'etag', 'dandi:sha2-256': 'sha256'}
 
 
diff --git a/dandiapi/api/views/users.py b/dandiapi/api/views/users.py
index c4e6beccf..27362b8c1 100644
--- a/dandiapi/api/views/users.py
+++ b/dandiapi/api/views/users.py
@@ -2,22 +2,25 @@
 
 import logging
 import re
+from typing import TYPE_CHECKING
 
 from allauth.socialaccount.models import SocialAccount
 from django.contrib.auth.models import User
 from django.db.models import OuterRef, Q, Subquery
-from django.http.response import HttpResponseBase
 from drf_yasg.utils import swagger_auto_schema
 from rest_framework.decorators import api_view, parser_classes, permission_classes
 from rest_framework.parsers import JSONParser
 from rest_framework.permissions import IsAuthenticated
-from rest_framework.request import Request
 from rest_framework.response import Response
 
 from dandiapi.api.models import UserMetadata
 from dandiapi.api.permissions import IsApproved
 from dandiapi.api.views.serializers import UserDetailSerializer, UserSerializer
 
+if TYPE_CHECKING:
+    from django.http.response import HttpResponseBase
+    from rest_framework.request import Request
+
 logger = logging.getLogger(__name__)
 
 
diff --git a/dandiapi/api/views/version.py b/dandiapi/api/views/version.py
index 5c8ce119a..b94592414 100644
--- a/dandiapi/api/views/version.py
+++ b/dandiapi/api/views/version.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.db import transaction
 from django.utils.decorators import method_decorator
 from django_filters import rest_framework as filters
diff --git a/dandiapi/asgi.py b/dandiapi/asgi.py
index bf8afa87a..bec2a9522 100644
--- a/dandiapi/asgi.py
+++ b/dandiapi/asgi.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import os
 
 import configurations.importer
diff --git a/dandiapi/celery.py b/dandiapi/celery.py
index 4ca1d3d72..91e3ba7be 100644
--- a/dandiapi/celery.py
+++ b/dandiapi/celery.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import os
 
 from celery import Celery, signals
diff --git a/dandiapi/conftest.py b/dandiapi/conftest.py
index 79e2ffb2d..4af84693b 100644
--- a/dandiapi/conftest.py
+++ b/dandiapi/conftest.py
@@ -1,10 +1,11 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
 from django.conf import settings
-from django.core.files.storage import Storage
-from minio_storage.storage import MinioStorage
 import pytest
 from pytest_factoryboy import register
 from rest_framework.test import APIClient
-from storages.backends.s3 import S3Storage
 
 from dandiapi.api.storage import create_s3_storage
 from dandiapi.api.tests.factories import (
@@ -23,6 +24,11 @@
 from dandiapi.zarr.tests.factories import ZarrArchiveFactory
 from dandiapi.zarr.tests.utils import upload_zarr_file
 
+if TYPE_CHECKING:
+    from django.core.files.storage import Storage
+    from minio_storage.storage import MinioStorage
+    from storages.backends.s3 import S3Storage
+
 register(PublishedAssetFactory, _name='published_asset')
 register(DraftAssetFactory, _name='draft_asset')
 register(AssetBlobFactory)
@@ -84,7 +90,7 @@ def authenticated_api_client(user) -> APIClient:
 # storage fixtures are copied from django-s3-file-field test fixtures
 
 
-def base_s3_storage_factory(bucket_name: str) -> 'S3Storage':
+def base_s3_storage_factory(bucket_name: str) -> S3Storage:
     return create_s3_storage(bucket_name)
 
 
@@ -109,12 +115,12 @@ def embargoed_minio_storage_factory() -> MinioStorage:
 
 
 @pytest.fixture()
-def s3_storage() -> 'S3Storage':
+def s3_storage() -> S3Storage:
     return s3_storage_factory()
 
 
 @pytest.fixture()
-def embargoed_s3_storage() -> 'S3Storage':
+def embargoed_s3_storage() -> S3Storage:
     return s3_storage_factory()
 
 
diff --git a/dandiapi/drf_utils.py b/dandiapi/drf_utils.py
index ddb80f9e0..8aeb3da12 100644
--- a/dandiapi/drf_utils.py
+++ b/dandiapi/drf_utils.py
@@ -1,9 +1,14 @@
+from __future__ import annotations
+
 from django.core.exceptions import (
     PermissionDenied as DjangoPermissionDenied,
+)
+from django.core.exceptions import (
     ValidationError as DjangoValidationError,
 )
 from django.http import Http404
-from rest_framework import exceptions as drf_exceptions, status
+from rest_framework import exceptions as drf_exceptions
+from rest_framework import status
 from rest_framework.response import Response
 from rest_framework.serializers import as_serializer_error
 from rest_framework.views import exception_handler
diff --git a/dandiapi/search/apps.py b/dandiapi/search/apps.py
index a83b47ccc..099c61ef4 100644
--- a/dandiapi/search/apps.py
+++ b/dandiapi/search/apps.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.apps import AppConfig
 
 
diff --git a/dandiapi/search/migrations/0001_initial.py b/dandiapi/search/migrations/0001_initial.py
index 7a327a543..34ef2fae5 100644
--- a/dandiapi/search/migrations/0001_initial.py
+++ b/dandiapi/search/migrations/0001_initial.py
@@ -1,5 +1,5 @@
 # Generated by Django 4.1.4 on 2023-03-14 22:52
-# flake8: noqa
+from __future__ import annotations
 
 from django.contrib.postgres.operations import TrigramExtension
 from django.db import migrations, models
@@ -12,7 +12,7 @@
 VERSION_TABLE = Version._meta.db_table
 VERSION_ASSET_TABLE = Asset.versions.through._meta.db_table
 
-raw_sql = f'''
+raw_sql = f"""
 CREATE MATERIALIZED VIEW asset_search AS
     SELECT DISTINCT
         {VERSION_TABLE}.dandiset_id AS dandiset_id,
@@ -27,13 +27,18 @@
 CREATE UNIQUE INDEX idx_asset_search_dandiset_id_asset_id ON asset_search (dandiset_id, asset_id);
 
 
-CREATE INDEX idx_asset_search_asset_size ON asset_search (asset_size);
-CREATE INDEX idx_asset_search_measurement_technique ON asset_search USING gin ((asset_metadata->'measurementTechnique'));
-CREATE INDEX asset_search_metadata_species_name_idx ON asset_search ((asset_metadata #> '{{wasAttributedTo,0,species,name}}'));
-CREATE INDEX asset_search_metadata_genotype_name_idx ON asset_search ((asset_metadata #> '{{wasAttributedTo,0,genotype,name}}'));
+CREATE INDEX idx_asset_search_asset_size
+    ON asset_search (asset_size);
+CREATE INDEX idx_asset_search_measurement_technique
+    ON asset_search USING gin ((asset_metadata->'measurementTechnique'));
+CREATE INDEX asset_search_metadata_species_name_idx
+    ON asset_search ((asset_metadata #> '{{wasAttributedTo,0,species,name}}'));
+CREATE INDEX asset_search_metadata_genotype_name_idx
+    ON asset_search ((asset_metadata #> '{{wasAttributedTo,0,genotype,name}}'));
 
-CREATE INDEX idx_asset_search_encoding_format ON asset_search USING gin (UPPER(asset_metadata->>'encodingFormat') gin_trgm_ops);
-'''
+CREATE INDEX idx_asset_search_encoding_format
+    ON asset_search USING gin (UPPER(asset_metadata->>'encodingFormat') gin_trgm_ops);
+"""  # noqa: S608
 
 
 class Migration(migrations.Migration):
@@ -48,7 +53,10 @@ class Migration(migrations.Migration):
             name='AssetSearch',
             fields=[
                 ('dandiset_id', models.PositiveBigIntegerField()),
-                ('asset_id', models.PositiveBigIntegerField(primary_key=True, serialize=False)),
+                (
+                    'asset_id',
+                    models.PositiveBigIntegerField(primary_key=True, serialize=False),
+                ),
                 ('asset_metadata', models.JSONField()),
                 ('asset_size', models.PositiveBigIntegerField()),
             ],
diff --git a/dandiapi/search/models.py b/dandiapi/search/models.py
index 6be39ac03..41eb4f68c 100644
--- a/dandiapi/search/models.py
+++ b/dandiapi/search/models.py
@@ -1,12 +1,16 @@
 from __future__ import annotations
 
-from django.contrib.auth.models import User
+from typing import TYPE_CHECKING
+
 from django.db import models
 from django.db.models import OuterRef, Q, Subquery
 from guardian.shortcuts import get_objects_for_user
 
 from dandiapi.api.models import Dandiset
 
+if TYPE_CHECKING:
+    from django.contrib.auth.models import User
+
 
 class AssetSearchManager(models.Manager):
     def visible_to(self, user: User) -> models.QuerySet[AssetSearch]:
diff --git a/dandiapi/search/tests/test_permissions.py b/dandiapi/search/tests/test_permissions.py
index bf9f82578..1de98f343 100644
--- a/dandiapi/search/tests/test_permissions.py
+++ b/dandiapi/search/tests/test_permissions.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.db import connection
 import pytest
 
diff --git a/dandiapi/search/tests/test_views.py b/dandiapi/search/tests/test_views.py
index 01b5593fc..5f777d765 100644
--- a/dandiapi/search/tests/test_views.py
+++ b/dandiapi/search/tests/test_views.py
@@ -1,5 +1,11 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
 import pytest
-from rest_framework.test import APIClient
+
+if TYPE_CHECKING:
+    from rest_framework.test import APIClient
 
 
 @pytest.mark.django_db()
diff --git a/dandiapi/search/views/__init__.py b/dandiapi/search/views/__init__.py
index 055a3473c..ebe19a85d 100644
--- a/dandiapi/search/views/__init__.py
+++ b/dandiapi/search/views/__init__.py
@@ -1,5 +1,7 @@
-from django.contrib.auth.models import User
-from django.db.models.query import QuerySet
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
 from django.http.response import JsonResponse
 from drf_yasg.utils import swagger_auto_schema
 from rest_framework import serializers
@@ -8,6 +10,10 @@
 
 from dandiapi.search.models import AssetSearch
 
+if TYPE_CHECKING:
+    from django.contrib.auth.models import User
+    from django.db.models.query import QuerySet
+
 
 class SearchSerializer(serializers.Serializer):
     def to_queryset(self, user: User) -> QuerySet[AssetSearch]:
diff --git a/dandiapi/settings.py b/dandiapi/settings.py
index 51b898e2a..5550e116e 100644
--- a/dandiapi/settings.py
+++ b/dandiapi/settings.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import os
 from pathlib import Path
 
diff --git a/dandiapi/swagger.py b/dandiapi/swagger.py
index ac10510f0..8cdc144ef 100644
--- a/dandiapi/swagger.py
+++ b/dandiapi/swagger.py
@@ -1,5 +1,7 @@
 # Separate from settings.py due to being a somewhat of a premature import there.
 # See https://github.com/dandi/dandi-api/pull/482#issuecomment-901250541 .
+from __future__ import annotations
+
 from drf_yasg.inspectors import SwaggerAutoSchema
 
 
diff --git a/dandiapi/urls.py b/dandiapi/urls.py
index b6f889b85..32267b165 100644
--- a/dandiapi/urls.py
+++ b/dandiapi/urls.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.conf import settings
 from django.contrib import admin
 from django.urls import include, path, re_path, register_converter
diff --git a/dandiapi/wsgi.py b/dandiapi/wsgi.py
index a42b8a6a3..607460f4a 100644
--- a/dandiapi/wsgi.py
+++ b/dandiapi/wsgi.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import os
 
 import configurations.importer
diff --git a/dandiapi/zarr/admin.py b/dandiapi/zarr/admin.py
index 690f07569..b0fba4eda 100644
--- a/dandiapi/zarr/admin.py
+++ b/dandiapi/zarr/admin.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.contrib import admin, messages
 from django.utils.translation import ngettext
 
diff --git a/dandiapi/zarr/apps.py b/dandiapi/zarr/apps.py
index c849386eb..8b4b30035 100644
--- a/dandiapi/zarr/apps.py
+++ b/dandiapi/zarr/apps.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.apps import AppConfig
 
 
diff --git a/dandiapi/zarr/management/commands/ingest_dandiset_zarrs.py b/dandiapi/zarr/management/commands/ingest_dandiset_zarrs.py
index 92f6adecb..78da99ae5 100644
--- a/dandiapi/zarr/management/commands/ingest_dandiset_zarrs.py
+++ b/dandiapi/zarr/management/commands/ingest_dandiset_zarrs.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import djclick as click
 
 from dandiapi.zarr.tasks import ingest_dandiset_zarrs as _ingest_dandiset_zarrs
diff --git a/dandiapi/zarr/management/commands/ingest_zarr_archive.py b/dandiapi/zarr/management/commands/ingest_zarr_archive.py
index 0ba14ed4f..3bae54d3d 100644
--- a/dandiapi/zarr/management/commands/ingest_zarr_archive.py
+++ b/dandiapi/zarr/management/commands/ingest_zarr_archive.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import djclick as click
 
 from dandiapi.zarr.tasks import ingest_zarr_archive as _ingest_zarr_archive
diff --git a/dandiapi/zarr/migrations/0001_initial_v2.py b/dandiapi/zarr/migrations/0001_initial_v2.py
index 8c5c46835..b50facfe6 100644
--- a/dandiapi/zarr/migrations/0001_initial_v2.py
+++ b/dandiapi/zarr/migrations/0001_initial_v2.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import uuid
 
 from django.db import migrations, models
diff --git a/dandiapi/zarr/migrations/0002_null_charfield.py b/dandiapi/zarr/migrations/0002_null_charfield.py
new file mode 100644
index 000000000..782703bd1
--- /dev/null
+++ b/dandiapi/zarr/migrations/0002_null_charfield.py
@@ -0,0 +1,23 @@
+# Generated by Django 4.1.13 on 2023-11-11 04:25
+from __future__ import annotations
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('zarr', '0001_initial_v2'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='embargoedzarrarchive',
+            name='checksum',
+            field=models.CharField(blank=True, default=None, max_length=512, null=True),
+        ),
+        migrations.AlterField(
+            model_name='zarrarchive',
+            name='checksum',
+            field=models.CharField(blank=True, default=None, max_length=512, null=True),
+        ),
+    ]
diff --git a/dandiapi/zarr/models.py b/dandiapi/zarr/models.py
index 33a0dfdec..d558e9b92 100644
--- a/dandiapi/zarr/models.py
+++ b/dandiapi/zarr/models.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 import logging
-from pathlib import Path
+from typing import TYPE_CHECKING
 from urllib.parse import urlparse, urlunparse
 from uuid import uuid4
 
@@ -13,6 +13,9 @@
 from dandiapi.api.models import Dandiset
 from dandiapi.api.storage import get_embargo_storage, get_storage
 
+if TYPE_CHECKING:
+    from pathlib import Path
+
 logger = logging.Logger(name=__name__)
 
 
@@ -54,7 +57,7 @@ class Meta:
     name = models.CharField(max_length=512)
     file_count = models.BigIntegerField(default=0)
     size = models.BigIntegerField(default=0)
-    checksum = models.CharField(max_length=512, null=True, default=None)
+    checksum = models.CharField(max_length=512, null=True, default=None, blank=True)  # noqa: DJ001
     status = models.CharField(
         max_length=max(len(choice[0]) for choice in ZarrArchiveStatus.choices),
         choices=ZarrArchiveStatus.choices,
@@ -102,7 +105,10 @@ class ZarrArchive(BaseZarrArchive):
 
     def s3_path(self, zarr_path: str | Path):
         """Generate a full S3 object path from a path in this zarr_archive."""
-        return f'{settings.DANDI_DANDISETS_BUCKET_PREFIX}{settings.DANDI_ZARR_PREFIX_NAME}/{self.zarr_id}/{zarr_path}'  # noqa: E501
+        return (
+            f'{settings.DANDI_DANDISETS_BUCKET_PREFIX}{settings.DANDI_ZARR_PREFIX_NAME}/'
+            f'{self.zarr_id}/{zarr_path}'
+        )
 
 
 class EmbargoedZarrArchive(BaseZarrArchive):
@@ -113,4 +119,7 @@ class EmbargoedZarrArchive(BaseZarrArchive):
 
     def s3_path(self, zarr_path: str | Path):
         """Generate a full S3 object path from a path in this zarr_archive."""
-        return f'{settings.DANDI_DANDISETS_EMBARGO_BUCKET_PREFIX}{settings.DANDI_ZARR_PREFIX_NAME}/{self.dandiset.identifier}/{self.zarr_id}/{zarr_path}'  # noqa: E501
+        return (
+            f'{settings.DANDI_DANDISETS_EMBARGO_BUCKET_PREFIX}{settings.DANDI_ZARR_PREFIX_NAME}/'
+            f'{self.dandiset.identifier}/{self.zarr_id}/{zarr_path}'
+        )
diff --git a/dandiapi/zarr/tests/factories.py b/dandiapi/zarr/tests/factories.py
index 844b6e5f1..d536e3152 100644
--- a/dandiapi/zarr/tests/factories.py
+++ b/dandiapi/zarr/tests/factories.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import factory
 
 from dandiapi.api.tests.factories import DandisetFactory
diff --git a/dandiapi/zarr/tests/test_ingest_zarr_archive.py b/dandiapi/zarr/tests/test_ingest_zarr_archive.py
index 54bd06068..c14c3b8b6 100644
--- a/dandiapi/zarr/tests/test_ingest_zarr_archive.py
+++ b/dandiapi/zarr/tests/test_ingest_zarr_archive.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.conf import settings
 from guardian.shortcuts import assign_perm
 import pytest
diff --git a/dandiapi/zarr/tests/test_zarr.py b/dandiapi/zarr/tests/test_zarr.py
index e568d7c19..dfbc651d4 100644
--- a/dandiapi/zarr/tests/test_zarr.py
+++ b/dandiapi/zarr/tests/test_zarr.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from django.conf import settings
 from guardian.shortcuts import assign_perm
 import pytest
@@ -432,7 +434,7 @@ def test_zarr_file_list(api_client, storage, zarr_archive: ZarrArchive, zarr_fil
     )
     assert resp.status_code == 302
     assert resp.headers['Location'].startswith(
-        f'http://{settings.MINIO_STORAGE_ENDPOINT}/test-dandiapi-dandisets/test-prefix/test-zarr/{zarr_archive.zarr_id}/foo/bar/a.txt?'  # noqa: E501
+        f'http://{settings.MINIO_STORAGE_ENDPOINT}/test-dandiapi-dandisets/test-prefix/test-zarr/{zarr_archive.zarr_id}/foo/bar/a.txt?'
     )
 
 
@@ -445,5 +447,5 @@ def test_zarr_explore_head(api_client, storage, zarr_archive: ZarrArchive):
     resp = api_client.head(f'/api/zarr/{zarr_archive.zarr_id}/files/', {'prefix': filepath})
     assert resp.status_code == 302
     assert resp.headers['Location'].startswith(
-        f'http://{settings.MINIO_STORAGE_ENDPOINT}/test-dandiapi-dandisets/test-prefix/test-zarr/{zarr_archive.zarr_id}/{filepath}?'  # noqa: E501
+        f'http://{settings.MINIO_STORAGE_ENDPOINT}/test-dandiapi-dandisets/test-prefix/test-zarr/{zarr_archive.zarr_id}/{filepath}?'
     )
diff --git a/dandiapi/zarr/tests/test_zarr_upload.py b/dandiapi/zarr/tests/test_zarr_upload.py
index 2cf4bdc5a..fbb29ddc1 100644
--- a/dandiapi/zarr/tests/test_zarr_upload.py
+++ b/dandiapi/zarr/tests/test_zarr_upload.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from guardian.shortcuts import assign_perm
 import pytest
 from zarr_checksum.checksum import EMPTY_CHECKSUM
diff --git a/dandiapi/zarr/tests/utils.py b/dandiapi/zarr/tests/utils.py
index 27133ee56..a4412284a 100644
--- a/dandiapi/zarr/tests/utils.py
+++ b/dandiapi/zarr/tests/utils.py
@@ -1,12 +1,17 @@
+from __future__ import annotations
+
 import hashlib
 import os
 from pathlib import Path
+from typing import TYPE_CHECKING
 
 import faker
 from zarr_checksum.generators import ZarrArchiveFile
 
 from dandiapi.api.storage import get_boto_client
-from dandiapi.zarr.models import ZarrArchive
+
+if TYPE_CHECKING:
+    from dandiapi.zarr.models import ZarrArchive
 
 
 def upload_zarr_file(zarr_archive: ZarrArchive, path: str | None = None, size: int = 100):
diff --git a/dandiapi/zarr/views/__init__.py b/dandiapi/zarr/views/__init__.py
index 7d780e066..8c5a60585 100644
--- a/dandiapi/zarr/views/__init__.py
+++ b/dandiapi/zarr/views/__init__.py
@@ -2,9 +2,9 @@
 
 import logging
 from pathlib import Path
+from typing import TYPE_CHECKING
 
 from django.db import IntegrityError, transaction
-from django.db.models.query import QuerySet
 from django.http import HttpResponseRedirect
 from drf_yasg.utils import no_body, swagger_auto_schema
 from rest_framework import serializers, status
@@ -21,6 +21,9 @@
 from dandiapi.zarr.models import ZarrArchive, ZarrArchiveStatus
 from dandiapi.zarr.tasks import ingest_zarr_archive
 
+if TYPE_CHECKING:
+    from django.db.models.query import QuerySet
+
 logger = logging.getLogger(__name__)
 
 
diff --git a/manage.py b/manage.py
index 27eb1a701..37dd76dfe 100755
--- a/manage.py
+++ b/manage.py
@@ -1,4 +1,6 @@
 #!/usr/bin/env python
+from __future__ import annotations
+
 import os
 import sys
 
diff --git a/pyproject.toml b/pyproject.toml
index 07d473f5d..40e898a78 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,17 +1,3 @@
-[tool.black]
-line-length = 100
-skip-string-normalization = true
-target-version = ["py311"]
-exclude='\.eggs|\.git|\.mypy_cache|\.tox|\.venv|_build|buck-out|build|dist'
-
-[tool.isort]
-profile = "black"
-line_length = 100
-# Sort by name, don't cluster "from" vs "import"
-force_sort_within_sections = true
-# Combines "as" imports on the same line
-combine_as_imports = true
-
 [tool.mypy]
 ignore_missing_imports = true
 show_error_codes = true
@@ -28,3 +14,78 @@ exclude = [
 
 # [tool.django-stubs]
 # django_settings_module = "dandiapi.settings"
+
+[tool.ruff]
+line-length = 100
+target-version = "py311"
+select = ["ALL"]
+ignore = [
+  # Incompatible with formatter
+  # https://docs.astral.sh/ruff/formatter/#conflicting-lint-rules
+  "COM812", # missing-trailing-comma
+  "COM819", # prohibited-trailing-comma
+  "D206", # indent-with-spaces
+  "D300", # triple-single-quotes
+  "E111", # indentation-with-invalid-multiple
+  "E114", # indentation-with-invalid-multiple-comment
+  "E117", # over-indented
+  "ISC001", # single-line-implicit-string-concatenation
+  "ISC002", # multi-line-implicit-string-concatenation
+  "Q", # flake8-quotes
+  "W191", # tab-indentation
+
+  "A003", # Class attribute is shadowing a Python builtin
+  "ANN", # flake8-annotations
+  "ARG001", # Unused function argument
+  "ARG002", # Unused method argument
+  "D1", # Missing docstring
+  "EM101", # Exception must not use a string literal, assign to variable first
+  "EM102", # Exception must not use an f-string literal, assign to variable first
+  "ERA001", # Found commented-out code
+  "FIX", # flake8-fixme
+  "TD002", # Missing author in TODO
+  "TD003", # Missing issue link on the line following this TODO
+  "TRY003", # Avoid specifying long messages outside the exception class
+
+  # Try to fix upstream
+  "RUF012", #  Mutable class attributes should be annotated with `typing.ClassVar`
+
+  # Fix in DANDI codebase. PR that will fix this:
+  # https://github.com/dandi/dandi-archive/pull/1782
+  "PTH119", # TODO: re-enable this when it's fixed
+]
+
+[tool.ruff.per-file-ignores]
+"scripts/**" = [
+  "INP001", # File is part of an implicit namespace package
+]
+"**/migrations/**" = [
+  "N806", # Variable in function should be lowercase
+  "RUF012", # Mutable class attributes should be annotated with `typing.ClassVar`
+]
+"**/management/commands/**" = [
+  "INP001", # File is part of an implicit namespace package
+]
+"**/tests/**" = [
+  "DJ007", # Do not use `__all__`
+  "DJ008", # Model does not define `__str__` method
+  "PLR0913", # Too many arguments to function call
+  "PLR2004", # Magic value used in comparison
+  "S", # flake8-bandit
+  "SLF001", # Private member accessed
+]
+
+[tool.ruff.format]
+quote-style = "single"
+
+[tool.ruff.lint.flake8-self]
+extend-ignore-names = ["_base_manager", "_default_manager",  "_meta"]
+
+[tool.ruff.lint.isort]
+# Sort by name, don't cluster "from" vs "import"
+force-sort-within-sections = true
+# Deferred annotations allows TCH rules to move more imports into TYPE_CHECKING blocks
+required-imports = ["from __future__ import annotations"]
+
+[tool.ruff.lint.pydocstyle]
+convention = "pep257"
diff --git a/scripts/delete_from_versioned_bucket.py b/scripts/delete_from_versioned_bucket.py
index e6595e80b..7528be7b0 100644
--- a/scripts/delete_from_versioned_bucket.py
+++ b/scripts/delete_from_versioned_bucket.py
@@ -11,6 +11,8 @@
 You will need an AWS CLI profile set up with permission to delete objects from the desired bucket.
 See https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-profiles.html
 """
+from __future__ import annotations
+
 from concurrent.futures import ThreadPoolExecutor, as_completed
 
 import boto3
@@ -31,7 +33,7 @@ def delete_version(bucket, thing):
 @click.option(
     '--profile',
     prompt='AWS profile name',
-    help='The AWS profile to use. See https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-profiles.html',  # noqa: E501
+    help='The AWS profile to use. See https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-profiles.html',
 )
 @click.option('--bucket', prompt='Bucket', help='The bucket to delete from')
 @click.option('--prefix', prompt='Path to delete', help='The prefix to delete all files under')
diff --git a/scripts/papertrail.py b/scripts/papertrail.py
index 72f4c2570..068dc07bd 100755
--- a/scripts/papertrail.py
+++ b/scripts/papertrail.py
@@ -1,5 +1,7 @@
 #!/usr/bin/env python3
 """Script that will export all desired papertrail log files."""
+from __future__ import annotations
+
 from datetime import datetime
 import os
 from pathlib import Path
@@ -31,7 +33,7 @@
 @click.option(
     '-o', '--out', 'output_file', help='The output file', default='logs.tsv.gz', show_default=True
 )
-def cli(*, start, end, force, amend, output_file):
+def cli(*, start, end, force, amend, output_file):  # noqa: C901
     if PAPERTRAIL_TOKEN is None:
         raise ClickException(
             'Must set the PAPERTRAIL_APIKEY environment variable. '
diff --git a/setup.py b/setup.py
index b53f1f84b..1245f9ffc 100644
--- a/setup.py
+++ b/setup.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from pathlib import Path
 
 from setuptools import find_namespace_packages, setup
diff --git a/tox.ini b/tox.ini
index 0197f71cd..5b4304efb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,4 +1,6 @@
 [tox]
+# Don't use "min_version", to ensure Tox 3 respects this
+minversion = 4
 envlist =
     lint,
     type,
@@ -6,20 +8,22 @@ envlist =
     check-migrations,
 
 [testenv:lint]
-skipsdist = true
-skip_install = true
+package = skip
 deps =
     codespell~=2.0
-    flake8
-    flake8-black >= 0.2.4
-    flake8-bugbear
-    flake8-docstrings
-    flake8-isort
-    flake8-quotes
-    pep8-naming
+    ruff
 commands =
-    flake8 --config=tox.ini {posargs:.}
-    codespell {posargs:.}
+    ruff check
+    ruff format --check
+    codespell .
+
+[testenv:format]
+package = skip
+deps =
+    ruff
+commands =
+    ruff check --fix-only
+    ruff format
 
 [testenv:type]
 deps =
@@ -29,16 +33,6 @@ extras =
 commands =
     mypy {posargs:dandiapi/}
 
-[testenv:format]
-skipsdist = true
-skip_install = true
-deps =
-    black >= 23.1.0
-    isort
-commands =
-    isort {posargs:.}
-    black {posargs:.}
-
 [testenv:test]
 passenv =
     DJANGO_CELERY_BROKER_URL
@@ -75,27 +69,6 @@ extras =
 commands =
     {envpython} ./manage.py makemigrations --check --dry-run
 
-[flake8]
-max-line-length = 100
-show-source = True
-ignore =
-    # closing bracket does not match indentation of opening bracket’s line
-    E123
-    # whitespace before ':'
-    E203,
-    # line break before binary operator
-    W503,
-    # Missing docstring in *
-    D10,
-    # variables should be lowercased
-    N806,
-    # exceptions need Error in their name
-    N818
-extend-exclude =
-    build,
-    dist,
-    venvs,
-
 [pytest]
 DJANGO_SETTINGS_MODULE = dandiapi.settings
 DJANGO_CONFIGURATION = TestingConfiguration