diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index 69fe5bbf..00000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,191 +0,0 @@
-version: 2
-jobs:
-    test-autoio-interfaces:
-        docker:
-            - image: continuumio/miniconda3
-        steps:
-            - checkout  # checkout the code
-            - run: 
-                name: Create conda environment
-                command: |
-                    apt-get update --yes
-                    apt-get install --yes libxrender-dev build-essential
-                    conda env create -f autoio-interfaces/environment.yml
-            - run:
-                name: Build/install autoio-interfaces
-                command: |
-                    source activate autoio-interfaces-env
-                    cd autoio-interfaces
-                    python setup.py install
-            - run:
-                name: Test chemkin_io
-                command: |
-                    cd autoio-interfaces/chemkin_io
-                    source activate autoio-interfaces-env
-                    pytest . -v --disable-pytest-warnings --cov=chemkin_io --pyargs chemkin_io --cov-report=html
-                    coverage report
-            # - run:
-            #   name: Test intder_io
-            #   command: |
-            #       cd autoio-interfaces/intder_io
-            #       source activate autoio-interfaces-env
-            #       pytest . -v --disable-pytest-warnings --cov=intder_io --pyargs intder_io --cov-report=html
-            #       coverage report
-            - run:
-                name: Test pac99_io
-                command: |
-                    cd autoio-interfaces/pac99_io
-                    source activate autoio-interfaces-env
-                    pytest . -v --disable-pytest-warnings --cov=pac99_io --pyargs pac99_io --cov-report=html
-                    coverage report
-            - run:
-                name: Test projrot_io
-                command: |
-                    cd autoio-interfaces/projrot_io
-                    source activate autoio-interfaces-env
-                    pytest . -v --disable-pytest-warnings --cov=projrot_io --pyargs projrot_io --cov-report=html
-                    coverage report
-            - run:
-                name: Test polyrate_io
-                command: |
-                    cd autoio-interfaces/polyrate_io
-                    source activate autoio-interfaces-env
-                    pytest . -v --disable-pytest-warnings --cov=polyrate_io --pyargs polyrate_io --cov-report=html
-                    coverage report
-            - run:
-                name: Test thermp_io
-                command: |
-                    cd autoio-interfaces/thermp_io
-                    source activate autoio-interfaces-env
-                    pytest . -v --disable-pytest-warnings --cov=thermp_io --pyargs thermp_io --cov-report=html
-                    coverage report
-            - run:
-                name: Test varecof_io
-                command: |
-                    cd autoio-interfaces/varecof_io
-                    source activate autoio-interfaces-env
-                    pytest . -v --disable-pytest-warnings --cov=varecof_io --pyargs varecof_io --cov-report=html
-                    coverage report
-            - run:
-                name: Test onedmin_io
-                command: |
-                    cd autoio-interfaces/onedmin_io
-                    source activate autoio-interfaces-env
-                    pytest . -v --disable-pytest-warnings --cov=onedmin_io --pyargs onedmin_io --cov-report=html
-                    coverage report
-            - run:
-                name: Test mess_io
-                command: |
-                    cd autoio-interfaces/mess_io
-                    source activate autoio-interfaces-env
-                    pytest . -v --disable-pytest-warnings --cov=mess_io --pyargs mess_io --cov-report=html
-                    coverage report
-            - run:
-                name: Test autorun
-                command: |
-                    cd autoio-interfaces/autorun
-                    source activate autoio-interfaces-env
-                    pytest . -v --disable-pytest-warnings --cov=autorun --pyargs autorun --cov-report=html
-                    coverage report
-            - run:
-                name: Test elstruct
-                command: |
-                    cd autoio-interfaces/elstruct
-                    source activate autoio-interfaces-env
-                    pytest -v --cov=elstruct . --cov-report=html
-                    coverage report
-            - run:
-                name: Test autoio-interfaces format
-                command: |
-                    cd autoio-interfaces
-                    source activate autoio-interfaces-env
-                    flake8 --exit-zero ../autoio-interfaces
-                    pylint --rcfile=../.pylintrc $(git ls-files '*.py')
-            - store_artifacts:
-                    path: autoio-interfaces/chemkin_io/htmlcov
-            - store_artifacts:
-                    path: autoio-interfaces/intder_io/htmlcov
-            - store_artifacts:
-                    path: autoio-interfaces/pac99_io/htmlcov
-            - store_artifacts:
-                    path: autoio-interfaces/projrot_io/htmlcov
-            - store_artifacts:
-                    path: autoio-interfaces/polyrate_io/htmlcov
-            - store_artifacts:
-                    path: autoio-interfaces/thermp_io/htmlcov
-            - store_artifacts:
-                    path: autoio-interfaces/varecof_io/htmlcov
-            - store_artifacts:
-                    path: autoio-interfaces/onedmin_io/htmlcov
-            - store_artifacts:
-                    path: autoio-interfaces/mess_io/htmlcov
-            - store_artifacts:
-                    path: autoio-interfaces/elstruct/htmlcov
-            - store_artifacts:
-                    path: autoio-interfaces/autorun/htmlcov
-    test-autoio-base:
-        docker:
-            - image: continuumio/miniconda3
-        steps:
-            - checkout  # checkout the code
-            - run: 
-                name: Create conda environment
-                command: |
-                    apt-get update --yes
-                    apt-get install --yes libxrender-dev build-essential
-                    conda env create -f autoio-base/environment.yml
-            - run:
-                name: Build/install autoio-base
-                command: |
-                    source activate autoio-base-env
-                    cd autoio-base
-                    python setup.py install
-            - run:
-                name: Test autoparse
-                command: |
-                    source activate autoio-base-env
-                    cd autoio-base/autoparse
-                    pytest . -v --disable-pytest-warnings --cov=autoparse --cov-report=html
-                    coverage report
-            - run:
-                name: Test autoread
-                command: |
-                    cd autoio-base/autoread
-                    source activate autoio-base-env
-                    pytest . -v --disable-pytest-warnings --cov=autoread --cov-report=html
-                    coverage report
-            - run:
-                name: Test autowrite
-                command: |
-                    cd autoio-base/autowrite
-                    source activate autoio-base-env
-                    pytest . -v --disable-pytest-warnings --cov=autowrite --cov-report=html
-                    coverage report
-            - run:
-                name: Test ioformat
-                command: |
-                    cd autoio-base/ioformat
-                    source activate autoio-base-env
-                    pytest . -v --disable-pytest-warnings --cov=ioformat --cov-report=html
-                    coverage report
-            - run:
-                name: Test autoio-base format
-                command: |
-                    cd autoio-base
-                    source activate autoio-base-env
-                    flake8 --exit-zero ../autoio-base
-                    pylint --rcfile=../.pylintrc $(git ls-files '*.py')
-            - store_artifacts:
-                    path: autoio-base/autoparse/htmlcov
-            - store_artifacts:
-                    path: autoio-base/autoread/htmlcov
-            - store_artifacts:
-                    path: autoio-base/autowrite/htmlcov
-            - store_artifacts:
-                    path: autoio-base/ioformat/htmlcov
-workflows:
-    version: 2
-    build-all:
-        jobs:
-            - test-autoio-base
-            - test-autoio-interfaces
diff --git a/.github/workflows/lint.yaml b/.github/workflows/lint.yaml
new file mode 100644
index 00000000..f7195b7e
--- /dev/null
+++ b/.github/workflows/lint.yaml
@@ -0,0 +1,37 @@
+name: lint
+
+on: 
+  push:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+
+    steps:
+      # Repository
+      - name: Checkout the code
+        uses: actions/checkout@v4
+
+      # Environment
+      - name: Download environment files
+        run: |
+          wget https://raw.githubusercontent.com/Auto-Mech/amech-dev/main/pixi.toml
+          wget https://raw.githubusercontent.com/Auto-Mech/amech-dev/main/pixi.lock
+
+      - name: Set up Pixi
+        uses: prefix-dev/setup-pixi@v0.8.1
+
+      - name: Pip install
+        run: |
+          pixi run pip install -e . --no-deps
+
+      # Lint
+      - name: Lint
+        run: |
+          # # broken
+          # pixi run ./lint.sh
+          echo "Skipping until we are ready to turn this on again..."
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
new file mode 100644
index 00000000..4535d6ff
--- /dev/null
+++ b/.github/workflows/test.yaml
@@ -0,0 +1,50 @@
+name: test
+
+on: 
+  push:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+
+    steps:
+      # Repository
+      - name: Checkout the code
+        uses: actions/checkout@v4
+
+      # Environment
+      - name: Download environment files
+        run: |
+          wget https://raw.githubusercontent.com/Auto-Mech/amech-dev/main/pixi.toml
+          wget https://raw.githubusercontent.com/Auto-Mech/amech-dev/main/pixi.lock
+
+      - name: Set up Pixi
+        uses: prefix-dev/setup-pixi@v0.8.1
+
+      - name: Pip install
+        run: |
+          pixi run pip install git+https://github.com/Auto-Mech/autochem.git
+          pixi run pip install -e . --no-deps
+
+      # Test
+      - name: Test
+        run: |
+          pixi run pytest -v autoparse
+          pixi run pytest -v autoread
+          pixi run pytest -v autowrite
+          pixi run pytest -v ioformat
+          pixi run pytest -v chemkin_io
+          pixi run pytest -v projrot_io
+          pixi run pytest -v polyrate_io
+          pixi run pytest -v thermp_io
+          pixi run pytest -v onedmin_io
+          # # broken:
+          # pixi run pytest -v pac99_io   # ! fix
+          # pixi run pytest -v varecof_io # ! fix
+          # pixi run pytest -v mess_io    # ! FIX !
+          # pixi run pytest -v autorun    # ! fix
+          # pixi run pytest -v elstruct   # ! fix