diff --git a/.github/workflows/antsibull-docs.yml b/.github/workflows/antsibull-docs.yml
index 022aa07..b0fcb0c 100644
--- a/.github/workflows/antsibull-docs.yml
+++ b/.github/workflows/antsibull-docs.yml
@@ -30,34 +30,43 @@ jobs:
         with:
           path: antsibull-core
 
+      - name: Checkout antsibull-docs-parser main
+        uses: actions/checkout@v4
+        with:
+          repository: ansible-community/antsibull-docs-parser
+          ref: main
+          path: antsibull-docs-parser
+
       # nb: this is the first version of antsibull-docs that declares support
-      # for antsibull-core v2
-      - name: Check out antsibull-docs 1.8.0
+      # for antsibull-core v3.
+      # TODO: Change ref to a released version once antsibull-docs officially
+      # supports antsibull-core.
+      - name: Check out antsibull-docs main
         uses: actions/checkout@v4
         with:
           repository: ansible-community/antsibull-docs
-          ref: 1.8.0
+          ref: main
           path: antsibull-docs
 
       - name: Set up Python 3.11
+        id: python
         uses: actions/setup-python@v5
         with:
           python-version: '3.11'
 
       - name: Install dependencies
+        env:
+          PYTHON: "${{ steps.python.outputs.python-path }}"
         run: |
-          python3 -m venv venv
+          pipx install --python "${PYTHON}" nox
+          python -m venv venv
           . ./venv/bin/activate
-          python -m pip install --upgrade pip
-          python -m pip install . ../antsibull-core "pyre-check ~= 0.9"
+          python -m pip install . ../antsibull-core
         working-directory: antsibull-docs
 
-      # pyre should complain if a signature changed in an incompatible way
-      - name: Lint with pyre
+      - name: Run type checkers
         run: |
-          . ./venv/bin/activate
-          sed -i 's|poetry run||' ./lint-pyre.sh
-          ./lint-pyre.sh
+          nox -e typing
         working-directory: antsibull-docs
 
       - name: Use antsibull-docs sphinx-init
diff --git a/.github/workflows/antsibull.yml b/.github/workflows/antsibull.yml
index 6507d25..a27157e 100644
--- a/.github/workflows/antsibull.yml
+++ b/.github/workflows/antsibull.yml
@@ -38,35 +38,37 @@ jobs:
           ref: 0.14.0
           path: antsibull-changelog
 
-      # nb: this is the first version of antsibull that declares support for antsibull-core v2
-      - name: Check out antsibull 0.52.0
+      # nb: this is the first version of antsibull that declares support
+      # for antsibull-core v3.
+      # TODO: Change ref to a released version once antsibull officially
+      # supports antsibull-core.
+      - name: Check out antsibull main
         uses: actions/checkout@v4
         with:
           repository: ansible-community/antsibull
-          ref: 0.52.0
+          ref: main
           path: antsibull
 
       - name: Set up Python 3.11
+        id: python
         uses: actions/setup-python@v5
         with:
           python-version: '3.11'
 
       - name: Install dependencies
+        env:
+          PYTHON: "${{ steps.python.outputs.python-path }}"
         run: |
+          pipx install --python "${PYTHON}" nox
           python -m venv venv
           . ./venv/bin/activate
-          python -m pip install --upgrade pip
-          python -m pip install . ../antsibull-changelog ../antsibull-core "pyre-check ~= 0.9" ansible-core "wheel"
+          python -m pip install . ../antsibull-core ../antsibull-changelog
           ansible-galaxy collection install community.general
         working-directory: antsibull
 
-      # pyre should complain if a signature changed in an incompatible way
-      - name: Lint with pyre
+      - name: Run type checkers
         run: |
-          . ./venv/bin/activate
-          sed -i 's|poetry run||' ./lint-pyre.sh
-          sed -i 's|--search-path ../antsibull-docs/src/||' ./lint-pyre.sh
-          ./lint-pyre.sh
+          nox -e typing
         working-directory: antsibull
 
       - name: "Test building a release: Ansible 7 with ansible-core 2.14"
diff --git a/README.md b/README.md
index cdbe9e0..7878e30 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ antsibull-core is covered by the [Ansible Code of Conduct](https://docs.ansible.
 
 From version 1.0.0 on, antsibull-core sticks to semantic versioning and aims at providing no backwards compatibility breaking changes during a major release cycle. We might make exceptions from this in case of security fixes for vulnerabilities that are severe enough.
 
-The current major version is 2.x.y. Development for 2.x.y occurs on the `main` branch. 1.x.y is End of Life and was developed on the `stable-1` branch. It is no longer updated. 2.x.y mainly differs from 1.x.y by dropping support for Python 3.6, 3.7, and 3.8. It deprecates several compatibility functions for older Python versions that are no longer needed; see the changelog for details.
+The current development version is 3.x.y. 3.x.y is developed on the `main` branch. The current supported major version is 2.x.y. Development for 2.x.y occurs on the `stable-2` branch. 1.x.y is End of Life and was developed on the `stable-1` branch. It is no longer updated. 2.x.y mainly differs from 1.x.y by dropping support for Python 3.6, 3.7, and 3.8. It deprecates several compatibility functions for older Python versions that are no longer needed; see the changelog for details.
 
 ## Development
 
diff --git a/src/antsibull_core/__init__.py b/src/antsibull_core/__init__.py
index ce75392..943d0f3 100644
--- a/src/antsibull_core/__init__.py
+++ b/src/antsibull_core/__init__.py
@@ -9,6 +9,6 @@
 
 from __future__ import annotations
 
-__version__ = "2.2.0.post0"
+__version__ = "3.0.0.dev0"
 
 __all__ = ("__version__",)