diff --git a/.azure-pipelines/gpu-tests.yml b/.azure-pipelines/gpu-tests.yml
index 6142c3a3..a941c232 100644
--- a/.azure-pipelines/gpu-tests.yml
+++ b/.azure-pipelines/gpu-tests.yml
@@ -18,9 +18,9 @@ trigger:
 pr:
   branches:
     include:
-      - '*'  # testing all branches that are ready for review (may revert to below if resource constraints dictate)
-      # - main
-      # - release/*
+      # - '*'
+      - main
+      - release/*
   paths:
     include:
       - setup.*
diff --git a/.github/actions/check-file-diffs/action.yml b/.github/actions/check-file-diffs/action.yml
new file mode 100644
index 00000000..7f7917ee
--- /dev/null
+++ b/.github/actions/check-file-diffs/action.yml
@@ -0,0 +1,49 @@
+name: Check file diffs
+description: Compare files with git diff and produce a patch if they differ
+inputs:
+  compare_paths:
+    description: Space-separated list of files/paths to compare with git diff
+    required: true
+  patch_path:
+    description: Path to write the patch file
+    required: false
+    default: file_diff.patch
+  error_message:
+    description: Custom error message to display if files differ
+    required: false
+    default: "Files have changed"
+runs:
+  using: composite
+  steps:
+    - id: check
+      name: Check for diffs and write patch
+      shell: bash
+      run: |
+        set -e
+        rc=0
+        git --no-pager diff --exit-code ${{ inputs.compare_paths }} > ${{ inputs.patch_path }} 2> file_diff.err || rc=$?
+        if [ "$rc" -eq 0 ]; then
+          echo "changed=false" >> $GITHUB_OUTPUT
+          rm -f file_diff.err || true
+        elif [ "$rc" -eq 1 ]; then
+          echo "changed=true" >> $GITHUB_OUTPUT
+          echo "Patch size: $(wc -c < ${{ inputs.patch_path }}) bytes"
+          echo "${{ inputs.error_message }}"
+          echo "--- Diff ---"
+          cat ${{ inputs.patch_path }} || true
+          rm -f file_diff.err || true
+        else
+          echo "git diff failed with exit code $rc" >&2
+          echo "--- git diff stderr ---" >&2
+          cat file_diff.err >&2 || true
+          exit $rc
+        fi
+        echo "patch_path=${{ inputs.patch_path }}" >> $GITHUB_OUTPUT
+
+outputs:
+  changed:
+    description: 'true if files differ'
+    value: ${{ steps.check.outputs.changed }}
+  patch_path:
+    description: 'path to generated patch file'
+    value: ${{ steps.check.outputs.patch_path }}
diff --git a/.github/actions/install-ci-dependencies/action.yml b/.github/actions/install-ci-dependencies/action.yml
new file mode 100644
index 00000000..b8afd1dd
--- /dev/null
+++ b/.github/actions/install-ci-dependencies/action.yml
@@ -0,0 +1,56 @@
+name: "Install CI Dependencies"
+description: "Install Python dependencies for CI workflows including platform-dependent packages and post-upgrades"
+
+inputs:
+  show_pip_list:
+    description: "Whether to show pip list output after installations"
+    required: false
+    default: "false"
+  apply_post_upgrades:
+    description: "Whether to apply post-upgrade packages"
+    required: false
+    default: "true"
+
+runs:
+  using: "composite"
+  steps:
+    - name: Set up venv and install ci dependencies
+      shell: bash
+      run: |
+        python -m pip install --upgrade pip setuptools wheel build --cache-dir "$PIP_CACHE_DIR"
+        # Prefer CI pinned requirements if present
+        if [ -f requirements/ci/requirements.txt ]; then
+          pip install -r requirements/ci/requirements.txt --cache-dir "$PIP_CACHE_DIR"
+          python -m pip install -e '.[test,examples,lightning]' --cache-dir "$PIP_CACHE_DIR"
+        else
+          python -m pip install -e '.[test,examples,lightning]' -c requirements/ci_constraints.txt --cache-dir "$PIP_CACHE_DIR"
+        fi
+        if [ "${{ inputs.show_pip_list }}" = "true" ]; then
+          pip list
+        fi
+
+    - name: Install platform-dependent packages
+      shell: bash
+      run: |
+        # Install platform-dependent packages with flexible constraints to allow platform-specific resolution
+        if [ -f requirements/platform_dependent.txt ] && [ -s requirements/platform_dependent.txt ]; then
+          echo "Installing platform-dependent packages..."
+          python -m pip install -r requirements/platform_dependent.txt --cache-dir "$PIP_CACHE_DIR" || echo "Some platform-dependent packages may not be available on this platform, continuing..."
+        else
+          echo "No platform-dependent packages to install."
+        fi
+
+    - name: Optional post-upgrades (datasets/fsspec etc)
+      shell: bash
+      env:
+        APPLY_POST_UPGRADES: ${{ inputs.apply_post_upgrades }}
+      run: |
+        if ([ "${APPLY_POST_UPGRADES}" = "1" ] || [ "${APPLY_POST_UPGRADES}" = "true" ]) && [ -s requirements/post_upgrades.txt ]; then
+          echo "Applying post-upgrades..."
+          python -m pip install --upgrade -r requirements/post_upgrades.txt --cache-dir "$PIP_CACHE_DIR"
+          if [ "${{ inputs.show_pip_list }}" = "true" ]; then
+            pip list
+          fi
+        else
+          echo "Skipping post-upgrades (either disabled or file empty)."
+        fi
diff --git a/.github/actions/regen-ci-reqs/action.yml b/.github/actions/regen-ci-reqs/action.yml
index d1441e89..212fdb60 100644
--- a/.github/actions/regen-ci-reqs/action.yml
+++ b/.github/actions/regen-ci-reqs/action.yml
@@ -38,25 +38,11 @@ runs:
 
     - id: check
       name: Check for diffs and write patch
-      shell: bash
-      run: |
-        set -e
-        rc=0
-        git --no-pager diff --exit-code ${{ inputs.compare_paths }} > ${{ inputs.patch_path }} 2> regen_diff.err || rc=$?
-        if [ "$rc" -eq 0 ]; then
-          echo "changed=false" >> $GITHUB_OUTPUT
-          rm -f regen_diff.err || true
-        elif [ "$rc" -eq 1 ]; then
-          echo "changed=true" >> $GITHUB_OUTPUT
-          echo "Patch size: $(wc -c < ${{ inputs.patch_path }}) bytes"
-          rm -f regen_diff.err || true
-        else
-          echo "git diff failed with exit code $rc" >&2
-          echo "--- git diff stderr ---" >&2
-          cat regen_diff.err >&2 || true
-          exit $rc
-        fi
-        echo "patch_path=${{ inputs.patch_path }}" >> $GITHUB_OUTPUT
+      uses: ./.github/actions/check-file-diffs
+      with:
+        compare_paths: ${{ inputs.compare_paths }}
+        patch_path: ${{ inputs.patch_path }}
+        error_message: "CI requirements have changed and need to be regenerated"
 
 outputs:
   changed:
diff --git a/.github/workflows/ci_test-full.yml b/.github/workflows/ci_test-full.yml
index 40012675..6e89cb35 100644
--- a/.github/workflows/ci_test-full.yml
+++ b/.github/workflows/ci_test-full.yml
@@ -175,42 +175,10 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-pip-wheels-${{ steps.set_time_period.outputs.TIME_PERIOD }}-py${{ matrix.python-version }}-
 
-      - name: Set up venv and install ci dependencies (all OS)
-        shell: bash
-        run: |
-          python -m pip install --upgrade pip setuptools wheel build --cache-dir "$PIP_CACHE_DIR"
-          # Prefer CI pinned requirements if present
-          if [ -f requirements/ci/requirements.txt ]; then
-            pip install -r requirements/ci/requirements.txt --cache-dir "$PIP_CACHE_DIR"
-            python -m pip install -e '.[test,examples,lightning]' --cache-dir "$PIP_CACHE_DIR"
-          else
-            python -m pip install -e '.[test,examples,lightning]' -c requirements/ci_constraints.txt --cache-dir "$PIP_CACHE_DIR"
-          fi
-          pip list
-
-      - name: Install platform-dependent packages
-        shell: bash
-        run: |
-          # Install platform-dependent packages with flexible constraints to allow platform-specific resolution
-          if [ -f requirements/platform_dependent.txt ] && [ -s requirements/platform_dependent.txt ]; then
-            echo "Installing platform-dependent packages..."
-            python -m pip install -r requirements/platform_dependent.txt --cache-dir "$PIP_CACHE_DIR" || echo "Some platform-dependent packages may not be available on this platform, continuing..."
-          else
-            echo "No platform-dependent packages to install."
-          fi
-
-      - name: Optional post-upgrades (datasets/fsspec etc)
-        shell: bash
-        env:
-          APPLY_POST_UPGRADES: ${{ vars.APPLY_POST_UPGRADES || '1' }}
-        run: |
-          if [ "${APPLY_POST_UPGRADES}" = "1" ] && [ -s requirements/post_upgrades.txt ]; then
-            echo "Applying post-upgrades..."
-            python -m pip install --upgrade -r requirements/post_upgrades.txt --cache-dir "$PIP_CACHE_DIR"
-            pip list
-          else
-            echo "Skipping post-upgrades (either disabled or file empty)."
-          fi
+      - name: Install CI dependencies
+        uses: ./.github/actions/install-ci-dependencies
+        with:
+          show_pip_list: "true"
 
       - name: Run pytest coverage w/ configured instrumentation
         id: run-pytest-coverage
diff --git a/.github/workflows/copilot-setup-steps.yml b/.github/workflows/copilot-setup-steps.yml
index b9c7942f..161e9260 100644
--- a/.github/workflows/copilot-setup-steps.yml
+++ b/.github/workflows/copilot-setup-steps.yml
@@ -31,23 +31,32 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: '3.12'
-      - name: Set up venv and install dependencies
+
+      - name: Reset caching
+        id: set_time_period
+        run: |
+          python -c "import time; days = time.time() / 60 / 60 / 24; print(f'TIME_PERIOD=d{int(days / 7) * 7}')" >> $GITHUB_OUTPUT
+
+      - name: Get pip cache dir
+        id: pip-cache
         shell: bash
         run: |
-          python -m pip install --upgrade pip setuptools wheel build
-          # Prefer pinned CI requirements if present
-          if [ -f requirements/ci/requirements.txt ]; then
-            python -m pip install -r requirements/ci/requirements.txt -r requirements/platform_dependent.txt
-            python -m pip install -e '.[test,examples,lightning]'
-          else
-            python -m pip install -e '.[test,examples,lightning]' -c requirements/ci_constraints.txt
-          fi
-          # Optional post-upgrades (disabled by default)
-          if [ "${APPLY_POST_UPGRADES:-1}" = "1" ] && [ -s requirements/post_upgrades.txt ]; then
-            pip install --upgrade -r requirements/post_upgrades.txt
-          fi
-          pip list
-      # No env injection here; the shell uses ${APPLY_POST_UPGRADES:-1} to default when unset.
+          echo "PIP_CACHE_DIR=$(pip cache dir)" >> $GITHUB_ENV
+
+      - name: pip cache
+        uses: actions/cache@v4
+        with:
+          path: ${{ env.PIP_CACHE_DIR }}/wheels
+          key: ubuntu-22.04-pip-wheels-${{ steps.set_time_period.outputs.TIME_PERIOD }}-py3.12-${{ hashFiles('requirements/ci/requirements.txt') }}-${{ hashFiles('requirements/post_upgrades.txt') }}-${{ hashFiles('requirements/platform_dependent.txt') }}
+          restore-keys: |
+            ubuntu-22.04-pip-wheels-${{ steps.set_time_period.outputs.TIME_PERIOD }}-py3.12-
+
+      - name: Install CI dependencies
+        uses: ./.github/actions/install-ci-dependencies
+        with:
+          show_pip_list: "true"
+          apply_post_upgrades: "true"
+
       - name: Setup pyright, precommit and git lfs
         shell: bash
         run: |
diff --git a/.github/workflows/type-check.yml b/.github/workflows/type-check.yml
index 3513385b..40a97600 100644
--- a/.github/workflows/type-check.yml
+++ b/.github/workflows/type-check.yml
@@ -1,4 +1,4 @@
-name: Type Check
+name: Stale Stubs and Type Checks
 
 on:
   push:
@@ -9,6 +9,7 @@ on:
       - "pyproject.toml"
       - "src/**"
       - "requirements/**"
+      - "scripts/generate_op_stubs.py"
       - ".github/workflows/type-check.yml"
       # Exclude documentation-only files from triggering
       - "!docs/**"
@@ -28,6 +29,7 @@ on:
       - "pyproject.toml"
       - "src/**"
       - "requirements/**"
+      - "scripts/generate_op_stubs.py"
       - ".github/workflows/type-check.yml"
       # Exclude documentation-only files from triggering
       - "!docs/**"
@@ -75,42 +77,48 @@ jobs:
           restore-keys: |
             ubuntu-22.04-pip-wheels-${{ steps.set_time_period.outputs.TIME_PERIOD }}-py3.12-
 
-      - name: Set up venv and install ci dependencies
-        shell: bash
-        run: |
-          python -m pip install --upgrade pip setuptools wheel build --cache-dir "$PIP_CACHE_DIR"
-          # Prefer CI pinned requirements if present
-          if [ -f requirements/ci/requirements.txt ]; then
-            pip install -r requirements/ci/requirements.txt --cache-dir "$PIP_CACHE_DIR"
-            python -m pip install -e '.[test,examples,lightning]' --cache-dir "$PIP_CACHE_DIR"
-          else
-            python -m pip install -e '.[test,examples,lightning]' -c requirements/ci_constraints.txt --cache-dir "$PIP_CACHE_DIR"
-          fi
+      - name: Install CI dependencies
+        uses: ./.github/actions/install-ci-dependencies
+        with:
+          apply_post_upgrades: ${{ vars.APPLY_POST_UPGRADES || 'true' }}
 
-      - name: Install platform-dependent packages
+      - name: Check type stubs are up to date
+        id: check_stubs
+        continue-on-error: true
         shell: bash
         run: |
-          # Install platform-dependent packages with flexible constraints to allow platform-specific resolution
-          if [ -f requirements/platform_dependent.txt ] && [ -s requirements/platform_dependent.txt ]; then
-            echo "Installing platform-dependent packages..."
-            python -m pip install -r requirements/platform_dependent.txt --cache-dir "$PIP_CACHE_DIR" || echo "Some platform-dependent packages may not be available on this platform, continuing..."
-          else
-            echo "No platform-dependent packages to install."
-          fi
+          # Make a backup of current stubs
+          cp src/interpretune/__init__.pyi src/interpretune/__init__.pyi.backup
 
-      - name: Optional post-upgrades (datasets/fsspec etc)
-        shell: bash
-        env:
-          APPLY_POST_UPGRADES: ${{ vars.APPLY_POST_UPGRADES || '1' }}
-        run: |
-          if [ "${APPLY_POST_UPGRADES}" = "1" ] && [ -s requirements/post_upgrades.txt ]; then
-            echo "Applying post-upgrades..."
-            python -m pip install --upgrade -r requirements/post_upgrades.txt --cache-dir "$PIP_CACHE_DIR"
-          else
-            echo "Skipping post-upgrades (either disabled or file empty)."
-          fi
+          # Regenerate stubs
+          python scripts/generate_op_stubs.py
+
+          # Check if stubs changed using our shared action
+          echo "stub_check_step=true" >> $GITHUB_OUTPUT
+
+      - name: Check for stub differences
+        id: stub_diff
+        uses: ./.github/actions/check-file-diffs
+        with:
+          compare_paths: "src/interpretune/__init__.pyi"
+          patch_path: "stubs_diff.patch"
+          error_message: "Type stubs are stale and need to be regenerated with: python scripts/generate_op_stubs.py"
+
+      - name: Upload stub diff (if present)
+        if: steps.stub_diff.outputs.changed == 'true'
+        uses: actions/upload-artifact@v4
+        with:
+          name: type-stubs-diff
+          path: stubs_diff.patch
 
       - name: Run pyright type check
         shell: bash
         run: |
           pyright -p pyproject.toml
+
+      - name: Fail workflow if stubs are stale
+        if: steps.stub_diff.outputs.changed == 'true'
+        shell: bash
+        run: |
+          echo "::error::Type stubs are stale. Please run 'python scripts/generate_op_stubs.py' and commit the updated __init__.pyi file."
+          exit 1
diff --git a/scripts/generate_op_stubs.py b/scripts/generate_op_stubs.py
index fa1f1cef..826afe96 100644
--- a/scripts/generate_op_stubs.py
+++ b/scripts/generate_op_stubs.py
@@ -255,6 +255,11 @@ def generate_stubs(yaml_path: Path, output_path: Path) -> None:
         "from interpretune.base.datamodules import ITDataModule as ITDataModule",
         "from interpretune.base.components.mixins import MemProfilerHooks as MemProfilerHooks",
         "from interpretune.analysis.ops import AnalysisBatch as AnalysisBatch",
+        "from interpretune.analysis import (",
+        "    AnalysisStore as AnalysisStore,",
+        "    DISPATCHER as DISPATCHER,",
+        "    SAEAnalysisTargets as SAEAnalysisTargets,",
+        ")",
         "from interpretune.config import (",
         "    ITLensConfig as ITLensConfig,",
         "    SAELensConfig as SAELensConfig,",
@@ -264,7 +269,11 @@ def generate_stubs(yaml_path: Path, output_path: Path) -> None:
         "    GenerativeClassificationConfig as GenerativeClassificationConfig,",
         "    BaseGenerationConfig as BaseGenerationConfig,",
         "    HFGenerationConfig as HFGenerationConfig,",
+        "    SAELensFromPretrainedConfig as SAELensFromPretrainedConfig,",
+        "    AnalysisCfg as AnalysisCfg,",
         ")",
+        "from interpretune.session import ITSessionConfig as ITSessionConfig, ITSession as ITSession",
+        "from interpretune.runners import AnalysisRunner as AnalysisRunner",
         "from interpretune.utils import rank_zero_warn as rank_zero_warn, sanitize_input_name as sanitize_input_name",
         "from interpretune.protocol import STEP_OUTPUT as STEP_OUTPUT",
         "",
@@ -296,6 +305,39 @@ def generate_stubs(yaml_path: Path, output_path: Path) -> None:
 
     print(f"Stubs generated at {output_path}")
 
+    # Apply formatting to match pre-commit hooks
+    try:
+        import subprocess
+
+        # Ensure pre-commit hooks are installed
+        # We run install every time since it's idempotent and fast if already installed
+        install_result = subprocess.run(["pre-commit", "install"], capture_output=True, text=True, cwd=project_root)
+
+        if install_result.returncode != 0:
+            print(f"Warning: Failed to install pre-commit hooks: {install_result.stderr}")
+            print("Skipping formatting step")
+            return
+
+        # Run pre-commit ruff formatting on the generated file to match pre-commit formatting
+        result = subprocess.run(
+            ["pre-commit", "run", "ruff-format", "--files", str(output_path)],
+            capture_output=True,
+            text=True,
+            cwd=project_root,
+        )
+
+        if result.returncode == 0:
+            print(f"Applied ruff formatting to {output_path}")
+        else:
+            # Pre-commit returns non-zero when it makes changes, which is expected
+            if "reformatted" in result.stdout or "Passed" in result.stdout:
+                print(f"Applied ruff formatting to {output_path}")
+            else:
+                print(f"Warning: ruff formatting may have failed: {result.stdout}")
+
+    except Exception as e:
+        print(f"Warning: Could not apply formatting: {e}")
+
 
 if __name__ == "__main__":
     yaml_path = project_root / "src" / "interpretune" / "analysis" / "ops" / "native_analysis_functions.yaml"
diff --git a/src/interpretune/__init__.pyi b/src/interpretune/__init__.pyi
index e129d21a..f031b53a 100644
--- a/src/interpretune/__init__.pyi
+++ b/src/interpretune/__init__.pyi
@@ -12,6 +12,11 @@ from interpretune.protocol import BaseAnalysisBatchProtocol, DefaultAnalysisBatc
 from interpretune.base.datamodules import ITDataModule as ITDataModule
 from interpretune.base.components.mixins import MemProfilerHooks as MemProfilerHooks
 from interpretune.analysis.ops import AnalysisBatch as AnalysisBatch
+from interpretune.analysis import (
+    AnalysisStore as AnalysisStore,
+    DISPATCHER as DISPATCHER,
+    SAEAnalysisTargets as SAEAnalysisTargets,
+)
 from interpretune.config import (
     ITLensConfig as ITLensConfig,
     SAELensConfig as SAELensConfig,
@@ -21,7 +26,11 @@ from interpretune.config import (
     GenerativeClassificationConfig as GenerativeClassificationConfig,
     BaseGenerationConfig as BaseGenerationConfig,
     HFGenerationConfig as HFGenerationConfig,
+    SAELensFromPretrainedConfig as SAELensFromPretrainedConfig,
+    AnalysisCfg as AnalysisCfg,
 )
+from interpretune.session import ITSessionConfig as ITSessionConfig, ITSession as ITSession
+from interpretune.runners import AnalysisRunner as AnalysisRunner
 from interpretune.utils import rank_zero_warn as rank_zero_warn, sanitize_input_name as sanitize_input_name
 from interpretune.protocol import STEP_OUTPUT as STEP_OUTPUT