diff --git a/.github/workflows/editorial_governance.yml b/.github/workflows/editorial_governance.yml
index 743d03d..93ee76b 100644
--- a/.github/workflows/editorial_governance.yml
+++ b/.github/workflows/editorial_governance.yml
@@ -23,8 +23,8 @@ jobs:
       - name: Install deps
         run: |
           python -m pip install --upgrade pip
-          pip install -r requirements.txt
-          if [ -f requirements-dev.txt ]; then pip install -r requirements-dev.txt; fi
+          python -m pip install -r requirements.txt
+          if [ -f requirements-dev.txt ]; then python -m pip install -r requirements-dev.txt; fi
       - name: Build catalog (alt output, seed)
         run: |
           python code/scripts/build_theme_catalog.py --output config/themes/theme_list_ci.json --limit 0
@@ -43,7 +43,7 @@ jobs:
           python code/scripts/validate_description_mapping.py
       - name: Run regression & unit tests (editorial subset + enforcement)
         run: |
-          pytest -q code/tests/test_theme_description_fallback_regression.py code/tests/test_synergy_pairs_and_provenance.py code/tests/test_editorial_governance_phase_d_closeout.py code/tests/test_theme_editorial_min_examples_enforced.py
+          python -m pytest -q code/tests/test_theme_description_fallback_regression.py code/tests/test_synergy_pairs_and_provenance.py code/tests/test_editorial_governance_phase_d_closeout.py code/tests/test_theme_editorial_min_examples_enforced.py
       - name: Ratchet proposal (non-blocking)
         run: |
           python code/scripts/ratchet_description_thresholds.py > ratchet_proposal.json || true
diff --git a/.gitignore b/.gitignore
index 9712ae3..fd0113e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@
 *.log
 *.txt
 !requirements.txt
+!requirements-dev.txt
 
 RELEASE_NOTES.md
 test.py
diff --git a/requirements-dev.txt b/requirements-dev.txt
new file mode 100644
index 0000000..21ef892
--- /dev/null
+++ b/requirements-dev.txt
@@ -0,0 +1,5 @@
+-r requirements.txt
+
+# Developer toolchain
+mypy>=1.9.0
+pytest>=8.2.0