diff --git a/.github/ISSUE_TEMPLATE/bug_report.md b/.github/ISSUE_TEMPLATE/bug_report.md
new file mode 100644
index 0000000..102ae9e
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@@ -0,0 +1,35 @@
+---
+name: Bug Report
+about: Report a bug to help us improve
+title: "[BUG] "
+labels: bug
+assignees: ""
+---
+
+## Description
+
+A clear and concise description of the bug.
+
+## Steps to Reproduce
+
+1. ...
+2. ...
+3. ...
+
+## Expected Behavior
+
+What you expected to happen.
+
+## Actual Behavior
+
+What actually happened. Include error messages and tracebacks if applicable.
+
+## Environment
+
+- OS: [e.g., macOS 14, Ubuntu 22.04]
+- Python version: [e.g., 3.11.5]
+- steer-materials version: [e.g., 0.2.11]
+
+## Additional Context
+
+Any other context about the problem.
diff --git a/.github/ISSUE_TEMPLATE/feature_request.md b/.github/ISSUE_TEMPLATE/feature_request.md
new file mode 100644
index 0000000..792fe22
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/feature_request.md
@@ -0,0 +1,23 @@
+---
+name: Feature Request
+about: Suggest an idea for this project
+title: "[FEATURE] "
+labels: enhancement
+assignees: ""
+---
+
+## Problem
+
+A clear description of the problem or use case this feature would address.
+
+## Proposed Solution
+
+A clear description of what you'd like to happen.
+
+## Alternatives Considered
+
+Any alternative solutions or features you've considered.
+
+## Additional Context
+
+Any other context, references, or screenshots about the feature request.
diff --git a/.gitignore b/.gitignore
index 38f04dd..a27efb4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,6 @@ scripts/
 dist/
 Archive/
 app_builds/
+.vscode/
+.venv/
+.pytest_cache/
diff --git a/CITATION.cff b/CITATION.cff
index cb8ab79..8f2288b 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -12,9 +12,9 @@ authors:
     orcid: https://orcid.org/0000-0002-0755-3981
 repository-code: https://github.com/stanford-developers/steer-materials
 license: AGPL-3.0-or-later
-version: 0.1.39
+version: "0.1.44"
 doi: 
-date-released: '2026-03-17'
+date-released: '2026-06-10'
 keywords:
   - battery
   - materials
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index a86cd72..55fc7bc 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -88,4 +88,4 @@ This project follows the [Contributor Covenant Code of Conduct](CODE_OF_CONDUCT.
 
 ## License
 
-By contributing, you agree that your contributions will be licensed under the [AGPL-3.0](LICENCE.txt) license and, per the CLA, may also be distributed under the project's commercial license.
+By contributing, you agree that your contributions will be licensed under the [AGPL-3.0](LICENSE) license and, per the CLA, may also be distributed under the project's commercial license.
diff --git a/LICENCE.txt b/LICENSE
similarity index 99%
rename from LICENCE.txt
rename to LICENSE
index be745ec..a52c571 100644
--- a/LICENCE.txt
+++ b/LICENSE
@@ -1,6 +1,6 @@
 STEER Materials - Dual Licensed
 
-Copyright (c) 2024-2026 Nicholas Siemons
+Copyright (c) 2024-2026 Stanford University
 
 1. Open-source license: GNU Affero General Public License v3.0 (AGPL-3.0)
    See the full AGPL-3.0 license text below.
diff --git a/README.md b/README.md
index 4151c2d..52f46a2 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,7 @@ pytest --cov=steer_materials
 
 ## Documentation
 
-Full documentation for the STEER ecosystem is available at the [STEER documentation site](https://github.com/stanford-developers).
+Full documentation for this package is available at [stanford-developers.github.io/steer-materials](https://stanford-developers.github.io/steer-materials/).
 
 ## Contributing
 
@@ -69,4 +69,4 @@ This project is dual-licensed:
 1. **Open source** — [GNU Affero General Public License v3.0](https://www.gnu.org/licenses/agpl-3.0) (AGPL-3.0-or-later)
 2. **Commercial** — A separate commercial license is available for use without AGPL-3.0 copyleft requirements. Contact [nsiemons@stanford.edu](mailto:nsiemons@stanford.edu) for details.
 
-See [LICENCE.txt](LICENCE.txt) for full terms.
\ No newline at end of file
+See [LICENSE](LICENSE) for full terms.
\ No newline at end of file
diff --git a/SECURITY.md b/SECURITY.md
new file mode 100644
index 0000000..5f45117
--- /dev/null
+++ b/SECURITY.md
@@ -0,0 +1,16 @@
+# Security Policy
+
+## Supported Versions
+
+Only the latest released version of steer-materials receives security updates.
+
+## Reporting a Vulnerability
+
+Please do **not** open a public GitHub issue for security vulnerabilities.
+
+Instead, report them privately by emailing [nsiemons@stanford.edu](mailto:nsiemons@stanford.edu)
+with a description of the issue, steps to reproduce, and any relevant details.
+
+You should receive an acknowledgement within a few business days. Once the issue
+is confirmed and a fix is available, we will coordinate disclosure and credit
+you in the release notes unless you prefer to remain anonymous.
diff --git a/docs/developer.md b/docs/developer.md
index 3ba012d..8245068 100644
--- a/docs/developer.md
+++ b/docs/developer.md
@@ -51,7 +51,7 @@ steer-materials/
 ├── docs/                  # MkDocs documentation (this site)
 ├── .github/workflows/     # CI: tests + linting
 ├── pyproject.toml         # Build config, dependencies, tool settings
-├── LICENCE.txt            # Dual license (AGPL-3.0 + commercial)
+├── LICENSE                # Dual license (AGPL-3.0 + commercial)
 ├── CITATION.cff           # Citation metadata
 ├── CONTRIBUTING.md        # Contribution guidelines
 └── CODE_OF_CONDUCT.md     # Contributor Covenant v2.1
diff --git a/pyproject.toml b/pyproject.toml
index 1c56e67..dc798fb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "steer-materials"
 dynamic = ["version"]
-description = "Modelling energy storage from cell to site - STEER OpenCell Design"
+description = "Base material classes for the STEER OpenCell platform."
 readme = "README.md"
 requires-python = ">=3.10"
 license = {text = "AGPL-3.0-or-later"}
@@ -31,7 +31,7 @@ classifiers = [
 ]
 
 dependencies = [
-    "steer-core==0.2.12",
+    "steer-core==0.2.18",
 ]
 
 [project.optional-dependencies]
@@ -58,7 +58,7 @@ docs = [
 Homepage = "https://github.com/stanford-developers/steer-materials/"
 Repository = "https://github.com/stanford-developers/steer-materials/"
 "Bug Tracker" = "https://github.com/stanford-developers/steer-materials/issues"
-Documentation = "https://github.com/stanford-developers"
+Documentation = "https://stanford-developers.github.io/steer-materials/"
 
 [tool.setuptools]
 package-dir = {"" = "."}
diff --git a/steer_materials/Base.py b/steer_materials/Base.py
index 3929dd6..8efc5bd 100644
--- a/steer_materials/Base.py
+++ b/steer_materials/Base.py
@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: 2024-2026 Nicholas Siemons
+# SPDX-FileCopyrightText: 2024-2026 Stanford University
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
 from steer_core.Constants.Units import *
@@ -9,8 +9,6 @@
 
 from datetime import datetime as dt
 
-import numpy as np
-
 
 class _Material(
     ValidationMixin, 
@@ -64,14 +62,14 @@ def _update_ranges(self):
     @property
     def density(self) -> float:
         """Density of the material in g/cm³."""
-        return np.round(self._density * (KG_TO_G / M_TO_CM**3), 2)
+        return self._density * (KG_TO_G / M_TO_CM**3)
 
     @property
     def density_range(self) -> tuple[float, float]:
         """Soft range for density (±10% of current value) in g/cm³."""
         return (
-            np.round(self._density_range[0] * (KG_TO_G / M_TO_CM**3), 2),
-            np.round(self._density_range[1] * (KG_TO_G / M_TO_CM**3), 2),
+            self._density_range[0] * (KG_TO_G / M_TO_CM**3),
+            self._density_range[1] * (KG_TO_G / M_TO_CM**3),
         )
 
     @property
@@ -82,14 +80,14 @@ def density_hard_range(self):
     @property
     def specific_cost(self):
         """Cost per kilogram in $/kg."""
-        return np.round(self._specific_cost, 2)
+        return self._specific_cost
 
     @property
     def specific_cost_range(self) -> tuple[float, float]:
         """Soft range for specific cost (0.5x–2x current value) in $/kg."""
         return (
-            np.round(self._specific_cost_range[0], 2),
-            np.round(self._specific_cost_range[1], 2),
+            self._specific_cost_range[0],
+            self._specific_cost_range[1],
         )
 
     @property
@@ -273,7 +271,7 @@ def __init__(
     def volume(self) -> float | None:
         """Volume in cm³, or `None` if not set."""
         if hasattr(self, '_volume') and self._volume is not None:
-            return np.round(self._volume * (M_TO_CM**3), 2)
+            return self._volume * (M_TO_CM**3)
         else:
             return None
         
@@ -281,7 +279,7 @@ def volume(self) -> float | None:
     def mass(self) -> float | None:
         """Mass in grams, or `None` if not set."""
         if hasattr(self, '_mass') and self._mass is not None:
-            return np.round(self._mass * KG_TO_G, 2)
+            return self._mass * KG_TO_G
         else:
             return None
         
@@ -289,7 +287,7 @@ def mass(self) -> float | None:
     def cost(self) -> float | None:
         """Cost in dollars, or `None` if not set."""
         if hasattr(self, '_cost') and self._cost is not None:
-            return np.round(self._cost, 2)
+            return self._cost
         else:
             return None
 
diff --git a/steer_materials/__init__.py b/steer_materials/__init__.py
index 8c77233..f59e3ef 100644
--- a/steer_materials/__init__.py
+++ b/steer_materials/__init__.py
@@ -1,5 +1,5 @@
-# SPDX-FileCopyrightText: 2024-2026 Nicholas Siemons
+# SPDX-FileCopyrightText: 2024-2026 Stanford University
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
-__version__ = "0.1.39"
+__version__ = "0.1.44"
 
diff --git a/test/test_material.py b/test/test_material.py
index 370704c..8d7a330 100644
--- a/test/test_material.py
+++ b/test/test_material.py
@@ -1,5 +1,4 @@
 import pytest
-import numpy as np
 from steer_materials.Base import _Material, Metal, Solvent
 
 
@@ -8,14 +7,14 @@ class TestMaterialConstruction:
 
     def test_metal_valid_construction(self, aluminum):
         assert aluminum.name == "Aluminum"
-        assert aluminum.density == 2.7
-        assert aluminum.specific_cost == 2.50
+        assert aluminum.density == pytest.approx(2.7, rel=1e-10)
+        assert aluminum.specific_cost == pytest.approx(2.50, rel=1e-10)
         assert aluminum.color == "silver"
 
     def test_solvent_valid_construction(self, water):
         assert water.name == "Water"
-        assert water.density == 1.0
-        assert water.specific_cost == 0.01
+        assert water.density == pytest.approx(1.0, rel=1e-10)
+        assert water.specific_cost == pytest.approx(0.01, rel=1e-10)
         assert water.color == "clear"
 
     def test_negative_density_raises(self):
@@ -54,11 +53,11 @@ class TestMaterialProperties:
     def test_density_returns_g_per_cm3(self):
         # Input 2.7 g/cm³ should come back as 2.7
         m = Metal(name="Al", density=2.7, specific_cost=1.0, color="grey")
-        assert m.density == 2.7
+        assert m.density == pytest.approx(2.7, rel=1e-10)
 
     def test_specific_cost_returns_per_kg(self):
         m = Metal(name="Al", density=2.7, specific_cost=3.45, color="grey")
-        assert m.specific_cost == 3.45
+        assert m.specific_cost == pytest.approx(3.45, rel=1e-10)
 
     def test_density_round_trip(self):
         # Verify internal storage → getter round-trips correctly
@@ -78,11 +77,11 @@ class TestMaterialSetters:
 
     def test_set_density(self, aluminum):
         aluminum.density = 5.0
-        assert aluminum.density == 5.0
+        assert aluminum.density == pytest.approx(5.0, rel=1e-10)
 
     def test_set_specific_cost(self, aluminum):
         aluminum.specific_cost = 10.0
-        assert aluminum.specific_cost == 10.0
+        assert aluminum.specific_cost == pytest.approx(10.0, rel=1e-10)
 
     def test_set_name(self, aluminum):
         aluminum.name = "Steel"
diff --git a/test/test_volumed_material.py b/test/test_volumed_material.py
index 0ba35f4..8d8ade8 100644
--- a/test/test_volumed_material.py
+++ b/test/test_volumed_material.py
@@ -34,14 +34,14 @@ class TestVolumedMaterialInit:
     """Tests for _VolumedMaterialMixin initialization."""
 
     def test_volume_init_derives_mass_and_cost(self, volumed_al):
-        assert volumed_al.volume == 100.0
-        assert volumed_al.mass == 270.0
-        assert volumed_al.cost == 0.68
+        assert volumed_al.volume == pytest.approx(100.0, rel=1e-10)
+        assert volumed_al.mass == pytest.approx(270.0, rel=1e-10)
+        assert volumed_al.cost == pytest.approx(0.675, abs=1e-5)
 
     def test_mass_init_derives_volume_and_cost(self, mass_al):
-        assert mass_al.volume == 100.0
-        assert mass_al.mass == 270.0
-        assert mass_al.cost == 0.68
+        assert mass_al.volume == pytest.approx(100.0, rel=1e-10)
+        assert mass_al.mass == pytest.approx(270.0, rel=1e-10)
+        assert mass_al.cost == pytest.approx(0.675, abs=1e-5)
 
     def test_no_volume_or_mass_gives_none(self, bare_al):
         assert bare_al.volume is None
@@ -65,15 +65,15 @@ class TestVolumedMaterialSetters:
 
     def test_set_volume(self, bare_al):
         bare_al.volume = 100.0
-        assert bare_al.volume == 100.0
-        assert bare_al.mass == 270.0
-        assert bare_al.cost == 0.68
+        assert bare_al.volume == pytest.approx(100.0, rel=1e-10)
+        assert bare_al.mass == pytest.approx(270.0, rel=1e-10)
+        assert bare_al.cost == pytest.approx(0.675, abs=1e-5)
 
     def test_set_mass(self, bare_al):
         bare_al.mass = 270.0
-        assert bare_al.volume == 100.0
-        assert bare_al.mass == 270.0
-        assert bare_al.cost == 0.68
+        assert bare_al.volume == pytest.approx(100.0, rel=1e-10)
+        assert bare_al.mass == pytest.approx(270.0, rel=1e-10)
+        assert bare_al.cost == pytest.approx(0.675, abs=1e-5)
 
     def test_set_volume_to_none_clears_all(self, volumed_al):
         volumed_al.volume = None
@@ -110,16 +110,16 @@ class TestVolumedMaterialPropagation:
     def test_density_change_updates_mass_and_cost(self, volumed_al):
         # volume=100 cm³, density 2.7→5.0 g/cm³
         volumed_al.density = 5.0
-        assert volumed_al.volume == 100.0
-        assert volumed_al.mass == 500.0
-        assert volumed_al.cost == 1.25
+        assert volumed_al.volume == pytest.approx(100.0, rel=1e-10)
+        assert volumed_al.mass == pytest.approx(500.0, rel=1e-10)
+        assert volumed_al.cost == pytest.approx(1.25, rel=1e-10)
 
     def test_specific_cost_change_updates_cost(self, volumed_al):
         # mass=270g, specific_cost 2.50→5.0 $/kg
         volumed_al.specific_cost = 5.0
-        assert volumed_al.volume == 100.0
-        assert volumed_al.mass == 270.0
-        assert volumed_al.cost == 1.35
+        assert volumed_al.volume == pytest.approx(100.0, rel=1e-10)
+        assert volumed_al.mass == pytest.approx(270.0, rel=1e-10)
+        assert volumed_al.cost == pytest.approx(1.35, rel=1e-10)
 
     def test_density_change_no_effect_without_volume(self, bare_al):
         bare_al.density = 5.0