diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..956cf2d
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,32 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+jobs:
+  pre-commit:
+    name: Checks via pre-commit
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v7
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@c771a70e6277c0a99b617c7a806ffedaca235ff9
+        with:
+          enable-cache: true
+
+      - name: Install dependencies
+        run: uv sync --locked
+
+      - name: Run pre-commit
+        run: uv run pre-commit run --all-files
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 8c6af73..cef9089 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -7,7 +7,7 @@ repos:
     -   id: end-of-file-fixer
     -   id: check-added-large-files
 
-# Run tests, including doctests
+# Project checks
 -   repo: local
     hooks:
     -   id: copyright-header
@@ -22,6 +22,13 @@ repos:
         types: [python]
         always_run: true
         pass_filenames: false
+    -   id: mypy
+        name: mypy
+        entry: uv run mypy dcaf/
+        language: system
+        types: [python]
+        always_run: true
+        pass_filenames: false
 
 # Linting and formatting
 -   repo: https://github.com/astral-sh/ruff-pre-commit
@@ -29,4 +36,3 @@ repos:
     hooks:
     -   id: ruff-check
     -   id: ruff-format
-        args: [ --check ]
diff --git a/LICENSE b/LICENSE
index 94554cf..a19484d 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2026 Battelle Energy Alliance, LLC 
+Copyright (c) 2026 Battelle Energy Alliance, LLC
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/dcaf/finance/opex.py b/dcaf/finance/opex.py
index 9e489ed..4534271 100644
--- a/dcaf/finance/opex.py
+++ b/dcaf/finance/opex.py
@@ -10,7 +10,13 @@
 from datetime import date
 
 from dcaf.finance.escalation import EscalationPolicy
-from dcaf.shared.types import DayCountConvention, Period, ProFormaCategory, TaxTreatment, TimingConvention
+from dcaf.shared.types import (
+    DayCountConvention,
+    Period,
+    ProFormaCategory,
+    TaxTreatment,
+    TimingConvention,
+)
 from dcaf.shared.validation import validate_finite
 from dcaf.streams.cashflows import CashFlowStream
 
diff --git a/dcaf/project/contracts.py b/dcaf/project/contracts.py
index f3a96fc..1466bf8 100644
--- a/dcaf/project/contracts.py
+++ b/dcaf/project/contracts.py
@@ -1,3 +1,5 @@
+# © 2026 Battelle Energy Alliance, LLC
+# ALL RIGHTS RESERVED
 """Generation-linked contract terms for project-level revenue policies."""
 
 from __future__ import annotations
diff --git a/dcaf/project/policies.py b/dcaf/project/policies.py
index a17a506..0d59132 100644
--- a/dcaf/project/policies.py
+++ b/dcaf/project/policies.py
@@ -1,3 +1,5 @@
+# © 2026 Battelle Energy Alliance, LLC
+# ALL RIGHTS RESERVED
 """Public protocol for generation-linked project cash-flow policies."""
 
 from __future__ import annotations
diff --git a/tests/unit/test_cashflow_stream.py b/tests/unit/test_cashflow_stream.py
index 29af78b..ce7d71a 100644
--- a/tests/unit/test_cashflow_stream.py
+++ b/tests/unit/test_cashflow_stream.py
@@ -134,8 +134,7 @@ def test_from_recurring_annual_escalation_is_date_based():
     )
     expected_dates = [date(2026, 4, 4), date(2026, 5, 4), date(2026, 6, 4)]
     expected_amounts = [
-        -200.0 * _annual_factor(date(2026, 3, 5), flow_date, 0.1)
-        for flow_date in expected_dates
+        -200.0 * _annual_factor(date(2026, 3, 5), flow_date, 0.1) for flow_date in expected_dates
     ]
     for i, flow in enumerate(cf_stream.entries):
         assert flow.date == expected_dates[i]
diff --git a/tests/unit/test_generation.py b/tests/unit/test_generation.py
index ce19862..3284a20 100644
--- a/tests/unit/test_generation.py
+++ b/tests/unit/test_generation.py
@@ -183,7 +183,7 @@ def test_from_capacity_rejects_capacity_factor_outside_unit_interval(capacity_fa
             periods=1,
         )
 
-        
+
 def test_from_capacity_supports_timing_conventions():
     begin = GenerationStream.from_capacity(1.0, 1.0, date(2030, 1, 1), 1, timing="begin")
     middle = GenerationStream.from_capacity(1.0, 1.0, date(2030, 1, 1), 1, timing="middle")
diff --git a/tests/unit/test_generation_linked_policies.py b/tests/unit/test_generation_linked_policies.py
index 4c3ac23..fea4fc9 100644
--- a/tests/unit/test_generation_linked_policies.py
+++ b/tests/unit/test_generation_linked_policies.py
@@ -1,3 +1,5 @@
+# © 2026 Battelle Energy Alliance, LLC
+# ALL RIGHTS RESERVED
 from datetime import date
 from math import inf, nan
 from typing import cast
@@ -279,7 +281,9 @@ def test_generation_revenue_callable_receives_whole_project_settlement_context()
     events: list[GenerationSettlementEvent] = []
 
     def price(event: GenerationSettlementEvent) -> float:
-        events.append(event)  # creates an external artifact that the `price` function was called for every generation event
+        events.append(
+            event
+        )  # creates an external artifact that the `price` function was called for every generation event
         return prices[event.date]
 
     analysis = (