diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7104fec..d02f139 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,7 +5,7 @@ on:
   pull_request:
 
 jobs:
-  quality:
+  lint:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -26,5 +26,38 @@ jobs:
       - name: mypy
         run: mypy src
 
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install dependencies
+        run: pip install -e ".[dev]"
+
       - name: pytest
-        run: pytest
+        run: pytest --cov=visor --cov-report=term-missing
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Install build tools
+        run: pip install build twine
+
+      - name: Build
+        run: python -m build
+
+      - name: Check dist
+        run: python -m twine check dist/*
diff --git a/.gitignore b/.gitignore
index 3409ff2..721137a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,6 +12,9 @@ env/
 .pytest_cache/
 .ruff_cache/
 .mypy_cache/
+.coverage
+coverage.xml
+htmlcov/
 
 # Build artifacts
 dist/
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 17a96e1..d384dd1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 All notable changes to this project will be documented in this file.
 
-The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
@@ -19,9 +19,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Auto-pagination helpers: `paginate_listings`, `paginate_dealers` (async generators),
   `iter_listings`, `iter_dealers` (sync iterators)
 - Public export audit and test suite (`tests/test_exports.py`)
+- `src/visor/py.typed` PEP 561 marker for typed-package distribution
+- Publish-grade `pyproject.toml` metadata: authors, classifiers, keywords, license files, URLs
+- CI matrix across Python 3.10–3.13 with separate lint, test, and build jobs
 
-## Future Work
-
-- Retry-with-backoff strategy
-- MCP server wrapper
-- Response caching
+[Unreleased]: https://github.com/whitewalls86/visor-python/commits/master/
diff --git a/pyproject.toml b/pyproject.toml
index e25220f..fea2df1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["hatchling"]
+requires = ["hatchling>=1.27"]
 build-backend = "hatchling.build"
 
 [project]
@@ -8,7 +8,23 @@ version = "0.1.0"
 description = "Python SDK for the Visor Public API"
 readme = "README.md"
 license = "MIT"
+license-files = ["LICENSE"]
 requires-python = ">=3.10"
+authors = [
+    { name = "Andrew Miller", email = "miller.andrew.preston@gmail.com" },
+]
+keywords = ["visor", "automotive", "car", "vehicle", "listings", "inventory", "api", "sdk"]
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+    "Typing :: Typed",
+]
 dependencies = [
     "httpx>=0.27",
     "pydantic>=2.0",
@@ -18,19 +34,36 @@ dependencies = [
 dev = [
     "pytest>=8.0",
     "pytest-asyncio>=0.23",
+    "pytest-cov>=5.0",
     "respx>=0.21",
     "ruff>=0.4",
     "mypy>=1.10",
     "pre-commit>=3.0",
+    "build>=1.0",
+    "twine>=5.0",
 ]
 
 [project.urls]
 Homepage = "https://visor.vin"
-Repository = "https://github.com/drewpearce/visor-python"
+Repository = "https://github.com/whitewalls86/visor-python"
+Issues = "https://github.com/whitewalls86/visor-python/issues"
+Changelog = "https://github.com/whitewalls86/visor-python/blob/master/CHANGELOG.md"
 
 [tool.hatch.build.targets.wheel]
 packages = ["src/visor"]
 
+[tool.hatch.build.targets.sdist]
+exclude = [
+    "Visor API Docs/",
+    "Design Docs/",
+    ".coverage",
+    ".pytest_cache/",
+    "dist/",
+    "*.egg-info/",
+    "__pycache__/",
+    "tests/",
+]
+
 [tool.ruff]
 line-length = 88
 target-version = "py310"
diff --git a/src/visor/models/listings.py b/src/visor/models/listings.py
index f4e2684..4db8c15 100644
--- a/src/visor/models/listings.py
+++ b/src/visor/models/listings.py
@@ -104,8 +104,9 @@ def to_params(self) -> dict[str, str]:
 class ListingSummary(VisorResponseModel):
     """Returned by filter_listings() and dealer_inventory().
 
-    Fields are optional because the caller controls projection via
-    ListingsFilter.fields.
+    id and vin are always present; the API returns them regardless of fields
+    projection. All other fields are optional because the caller controls which
+    fields are returned via ListingsFilter.fields.
     """
 
     id: str
diff --git a/src/visor/py.typed b/src/visor/py.typed
new file mode 100644
index 0000000..e69de29