lettr-com · voj-tech-j · Apr 20, 2026 · Apr 20, 2026
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -7,6 +7,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.0.0] - 2026-04-20
+
+### Changed
+- Marked the SDK as stable (1.0.0). No code-behavior changes since 0.3.0;
+  this release commits to the current public API under semantic versioning.
+  Breaking changes will require a 2.0.0.
+
+## [0.3.0] - 2026-04-20
+
 ### Changed
 - Synced with the latest OpenAPI spec: `ListEmailsResponse` and
   `ListProjectsResponse` no longer carry a top-level `success` flag;
@@ -105,6 +114,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   `ValidationError`, `NotFoundError`, `ConflictError`, `BadRequestError`,
   `ServerError`)
 
-[Unreleased]: https://github.com/lettr/lettr-python/compare/v0.2.0...HEAD
+[Unreleased]: https://github.com/lettr/lettr-python/compare/v1.0.0...HEAD
+[1.0.0]: https://github.com/lettr/lettr-python/compare/v0.3.0...v1.0.0
+[0.3.0]: https://github.com/lettr/lettr-python/compare/v0.2.0...v0.3.0
 [0.2.0]: https://github.com/lettr/lettr-python/compare/v0.1.0...v0.2.0
 [0.1.0]: https://github.com/lettr/lettr-python/releases/tag/v0.1.0
diff --git a/pyproject.toml b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "lettr"
-version = "0.3.0"
+version = "1.0.0"
 description = "Official Python SDK for the Lettr Email API"
 readme = "README.md"
 license = "MIT"
@@ -14,7 +14,7 @@ authors = [
 ]
 keywords = ["email", "transactional", "lettr", "api", "sdk"]
 classifiers = [
-    "Development Status :: 4 - Beta",
+    "Development Status :: 5 - Production/Stable",
     "Intended Audience :: Developers",
     "License :: OSI Approved :: MIT License",
     "Operating System :: OS Independent",

diff --git a/src/lettr/__init__.py b/src/lettr/__init__.py
@@ -61,7 +61,7 @@
 )
 from .resources import Domains, Emails, Projects, Templates, Webhooks
 
-__version__ = "0.3.0"
+__version__ = "1.0.0"
 
 __all__ = [
     # Client

diff --git a/src/lettr/__pycache__/__init__.cpython-313.pyc b/src/lettr/__pycache__/__init__.cpython-313.pyc
diff --git a/src/lettr/__pycache__/_client.cpython-313.pyc b/src/lettr/__pycache__/_client.cpython-313.pyc
diff --git a/src/lettr/__pycache__/_exceptions.cpython-313.pyc b/src/lettr/__pycache__/_exceptions.cpython-313.pyc
diff --git a/src/lettr/__pycache__/_types.cpython-313.pyc b/src/lettr/__pycache__/_types.cpython-313.pyc
diff --git a/src/lettr/_client.py b/src/lettr/_client.py
@@ -31,7 +31,7 @@ def __init__(
                 "Authorization": f"Bearer {api_key}",
                 "Content-Type": "application/json",
                 "Accept": "application/json",
-                "User-Agent": "lettr-python/0.3.0",
+                "User-Agent": "lettr-python/1.0.0",
             },
         )
 
@@ -98,7 +98,7 @@ def get_no_auth(self, path: str, *, params: dict[str, Any] | None = None) -> Any
                 timeout=self._timeout,
                 headers={
                     "Accept": "application/json",
-                    "User-Agent": "lettr-python/0.3.0",
+                    "User-Agent": "lettr-python/1.0.0",
                 },
             )
         except httpx.HTTPError as exc:

diff --git a/src/lettr/resources/__pycache__/domains.cpython-313.pyc b/src/lettr/resources/__pycache__/domains.cpython-313.pyc
diff --git a/src/lettr/resources/__pycache__/emails.cpython-313.pyc b/src/lettr/resources/__pycache__/emails.cpython-313.pyc
diff --git a/src/lettr/resources/__pycache__/projects.cpython-313.pyc b/src/lettr/resources/__pycache__/projects.cpython-313.pyc
diff --git a/src/lettr/resources/__pycache__/templates.cpython-313.pyc b/src/lettr/resources/__pycache__/templates.cpython-313.pyc
diff --git a/src/lettr/resources/__pycache__/webhooks.cpython-313.pyc b/src/lettr/resources/__pycache__/webhooks.cpython-313.pyc
diff --git a/tests/__pycache__/__init__.cpython-313.pyc b/tests/__pycache__/__init__.cpython-313.pyc
diff --git a/tests/__pycache__/conftest.cpython-313-pytest-9.0.3.pyc b/tests/__pycache__/conftest.cpython-313-pytest-9.0.3.pyc
diff --git a/tests/__pycache__/test_client.cpython-313-pytest-9.0.3.pyc b/tests/__pycache__/test_client.cpython-313-pytest-9.0.3.pyc
diff --git a/tests/__pycache__/test_domains.cpython-313-pytest-9.0.3.pyc b/tests/__pycache__/test_domains.cpython-313-pytest-9.0.3.pyc
diff --git a/tests/__pycache__/test_emails.cpython-313-pytest-9.0.3.pyc b/tests/__pycache__/test_emails.cpython-313-pytest-9.0.3.pyc
diff --git a/tests/__pycache__/test_exceptions.cpython-313-pytest-9.0.3.pyc b/tests/__pycache__/test_exceptions.cpython-313-pytest-9.0.3.pyc
diff --git a/tests/__pycache__/test_lettr.cpython-313-pytest-9.0.3.pyc b/tests/__pycache__/test_lettr.cpython-313-pytest-9.0.3.pyc
diff --git a/tests/__pycache__/test_projects.cpython-313-pytest-9.0.3.pyc b/tests/__pycache__/test_projects.cpython-313-pytest-9.0.3.pyc
diff --git a/tests/__pycache__/test_templates.cpython-313-pytest-9.0.3.pyc b/tests/__pycache__/test_templates.cpython-313-pytest-9.0.3.pyc
diff --git a/tests/__pycache__/test_types.cpython-313-pytest-9.0.3.pyc b/tests/__pycache__/test_types.cpython-313-pytest-9.0.3.pyc
diff --git a/tests/__pycache__/test_webhooks.cpython-313-pytest-9.0.3.pyc b/tests/__pycache__/test_webhooks.cpython-313-pytest-9.0.3.pyc