diff --git a/.github/workflows/sync-extension.yml b/.github/workflows/sync-extension.yml
new file mode 100644
index 0000000..3aae02a
--- /dev/null
+++ b/.github/workflows/sync-extension.yml
@@ -0,0 +1,126 @@
+name: Sync Extension from sentience-chrome
+
+on:
+  repository_dispatch:
+    types: [extension-updated]
+  workflow_dispatch:
+    inputs:
+      release_tag:
+        description: 'Release tag from sentience-chrome (e.g., v1.0.0)'
+        required: true
+        type: string
+  schedule:
+    # Check for new releases daily at 2 AM UTC
+    - cron: '0 2 * * *'
+
+jobs:
+  sync-extension:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+      
+    steps:
+    - name: Checkout sdk-python
+      uses: actions/checkout@v4
+      with:
+        token: ${{ secrets.GITHUB_TOKEN }}
+        
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.11'
+        
+    - name: Determine release tag
+      id: release
+      run: |
+        if [ "${{ github.event_name }}" == "workflow_dispatch" ]; then
+          TAG="${{ github.event.inputs.release_tag }}"
+        elif [ "${{ github.event_name }}" == "repository_dispatch" ]; then
+          TAG="${{ github.event.client_payload.release_tag }}"
+        else
+          # Scheduled check - get latest release
+          TAG=$(curl -s https://api.github.com/repos/${{ secrets.SENTIENCE_CHROME_REPO }}/releases/latest | jq -r '.tag_name // empty')
+        fi
+        
+        if [ -z "$TAG" ] || [ "$TAG" == "null" ]; then
+          echo "No release found, skipping"
+          echo "skip=true" >> $GITHUB_OUTPUT
+          exit 0
+        fi
+        
+        echo "tag=$TAG" >> $GITHUB_OUTPUT
+        echo "Release tag: $TAG"
+        
+    - name: Download extension files
+      if: steps.release.outputs.skip != 'true'
+      run: |
+        TAG="${{ steps.release.outputs.tag }}"
+        REPO="${{ secrets.SENTIENCE_CHROME_REPO }}"
+        
+        # Download release assets
+        mkdir -p extension-temp
+        cd extension-temp
+        
+        # Download each file from release
+        curl -L -H "Authorization: token ${{ secrets.SENTIENCE_CHROME_TOKEN }}" \
+          "https://api.github.com/repos/$REPO/releases/tags/$TAG" | \
+          jq -r '.assets[] | select(.name | endswith(".js") or endswith(".wasm") or endswith(".json") or endswith(".d.ts")) | .browser_download_url' | \
+          while read url; do
+            filename=$(basename "$url")
+            curl -L -H "Authorization: token ${{ secrets.SENTIENCE_CHROME_TOKEN }}" "$url" -o "$filename"
+          done
+        
+        # Alternative: Download from release archive if available
+        # Or use the extension-package artifact
+        
+    - name: Copy extension files
+      if: steps.release.outputs.skip != 'true'
+      run: |
+        # Create extension directory structure
+        mkdir -p sentience/extension/pkg
+        
+        # Copy extension files
+        cp extension-temp/manifest.json sentience/extension/ 2>/dev/null || echo "manifest.json not found in release"
+        cp extension-temp/content.js sentience/extension/ 2>/dev/null || echo "content.js not found in release"
+        cp extension-temp/background.js sentience/extension/ 2>/dev/null || echo "background.js not found in release"
+        cp extension-temp/injected_api.js sentience/extension/ 2>/dev/null || echo "injected_api.js not found in release"
+        
+        # Copy WASM files
+        cp extension-temp/pkg/sentience_core.js sentience/extension/pkg/ 2>/dev/null || echo "sentience_core.js not found"
+        cp extension-temp/pkg/sentience_core_bg.wasm sentience/extension/pkg/ 2>/dev/null || echo "sentience_core_bg.wasm not found"
+        cp extension-temp/pkg/*.d.ts sentience/extension/pkg/ 2>/dev/null || echo "Type definitions not found"
+        
+    - name: Check for changes
+      if: steps.release.outputs.skip != 'true'
+      id: changes
+      run: |
+        git config --local user.email "action@github.com"
+        git config --local user.name "GitHub Action"
+        git add sentience/extension/ || true
+        if git diff --staged --quiet; then
+          echo "changed=false" >> $GITHUB_OUTPUT
+          echo "No changes detected"
+        else
+          echo "changed=true" >> $GITHUB_OUTPUT
+          echo "Changes detected"
+        fi
+        
+    - name: Create Pull Request
+      if: steps.release.outputs.skip != 'true' && steps.changes.outputs.changed == 'true'
+      uses: peter-evans/create-pull-request@v5
+      with:
+        token: ${{ secrets.GITHUB_TOKEN }}
+        commit-message: "chore: sync extension files from sentience-chrome ${{ steps.release.outputs.tag }}"
+        title: "Sync Extension: ${{ steps.release.outputs.tag }}"
+        body: |
+          This PR syncs extension files from sentience-chrome release ${{ steps.release.outputs.tag }}.
+          
+          **Files updated:**
+          - Extension manifest and scripts
+          - WASM binary and bindings
+          
+          **Source:** [sentience-chrome release ${{ steps.release.outputs.tag }}](${{ secrets.SENTIENCE_CHROME_REPO }}/releases/tag/${{ steps.release.outputs.tag }})
+        branch: sync-extension-${{ steps.release.outputs.tag }}
+        delete-branch: true
+
diff --git a/sentience/browser.py b/sentience/browser.py
index 3ad7c71..521a964 100644
--- a/sentience/browser.py
+++ b/sentience/browser.py
@@ -53,18 +53,34 @@ def __init__(
     
     def start(self) -> None:
         """Launch browser with extension loaded"""
-        # Get extension path (sentience-chrome directory)
+        # Try to find extension in multiple locations:
+        # 1. Embedded extension (sentience/extension/) - for production/CI
+        # 2. Development mode (../sentience-chrome/) - for local development
+        
         # __file__ is sdk-python/sentience/browser.py, so:
         # parent = sdk-python/sentience/
         # parent.parent = sdk-python/
-        # parent.parent.parent = Sentience/ (project root)
-        repo_root = Path(__file__).parent.parent.parent
-        extension_source = repo_root / "sentience-chrome"
+        sdk_root = Path(__file__).parent.parent
+        
+        # Check for embedded extension first (production/CI)
+        embedded_extension = sdk_root / "sentience" / "extension"
         
-        if not extension_source.exists():
+        # Check for development extension (local development)
+        repo_root = sdk_root.parent
+        dev_extension = repo_root / "sentience-chrome"
+        
+        # Prefer embedded extension, fall back to dev extension
+        if embedded_extension.exists() and (embedded_extension / "manifest.json").exists():
+            extension_source = embedded_extension
+        elif dev_extension.exists() and (dev_extension / "manifest.json").exists():
+            extension_source = dev_extension
+        else:
             raise FileNotFoundError(
-                f"Extension not found at {extension_source}. "
-                "Make sure sentience-chrome directory exists."
+                f"Extension not found. Checked:\n"
+                f"  1. {embedded_extension}\n"
+                f"  2. {dev_extension}\n"
+                "Make sure extension files are available. "
+                "For development: cd ../sentience-chrome && ./build.sh"
             )
         
         # Create temporary extension bundle
diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..a1d7ccf
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,59 @@
+"""
+Pytest configuration and fixtures for Sentience SDK tests
+"""
+import os
+import pytest
+from pathlib import Path
+
+
+def pytest_configure(config):
+    """Register custom markers"""
+    config.addinivalue_line(
+        "markers", "requires_extension: mark test as requiring the sentience-chrome extension"
+    )
+
+
+@pytest.fixture(scope="session")
+def extension_available():
+    """Check if the sentience-chrome extension is available"""
+    # Check if extension exists
+    # __file__ is sdk-python/tests/conftest.py
+    # parent = sdk-python/tests/
+    # parent.parent = sdk-python/
+    # parent.parent.parent = Sentience/ (project root)
+    repo_root = Path(__file__).parent.parent.parent
+    extension_source = repo_root / "sentience-chrome"
+    
+    # Also check for required extension files
+    if extension_source.exists():
+        required_files = ["manifest.json", "content.js", "injected_api.js"]
+        pkg_dir = extension_source / "pkg"
+        if pkg_dir.exists():
+            # Check if WASM files exist
+            wasm_files = ["sentience_core.js", "sentience_core_bg.wasm"]
+            all_exist = all(
+                (extension_source / f).exists() for f in required_files
+            ) and all(
+                (pkg_dir / f).exists() for f in wasm_files
+            )
+            return all_exist
+    
+    return False
+
+
+@pytest.fixture(autouse=True)
+def skip_if_no_extension(request, extension_available):
+    """Automatically skip tests that require extension if it's not available"""
+    # Check if test is marked as requiring extension
+    marker = request.node.get_closest_marker("requires_extension")
+    
+    if marker and not extension_available:
+        # In CI, skip silently
+        # Otherwise, show a helpful message
+        if os.getenv("CI"):
+            pytest.skip("Extension not available in CI environment")
+        else:
+            pytest.skip(
+                "Extension not found. Build it first: cd ../sentience-chrome && ./build.sh"
+            )
+
diff --git a/tests/test_snapshot.py b/tests/test_snapshot.py
index b0678e7..febe3c5 100644
--- a/tests/test_snapshot.py
+++ b/tests/test_snapshot.py
@@ -7,6 +7,7 @@
 from sentience.models import Snapshot
 
 
+@pytest.mark.requires_extension
 def test_snapshot_basic():
     """Test basic snapshot on example.com"""
     with SentienceBrowser(headless=False) as browser:
@@ -23,6 +24,7 @@ def test_snapshot_basic():
                    for el in snap.elements)
 
 
+@pytest.mark.requires_extension
 def test_snapshot_roundtrip():
     """Test snapshot round-trip on multiple sites"""
     # Use sites that reliably have elements
@@ -57,6 +59,7 @@ def test_snapshot_roundtrip():
             # (min size 5x5, visibility, etc.) - this is acceptable
 
 
+@pytest.mark.requires_extension
 def test_snapshot_save():
     """Test snapshot save functionality"""
     import tempfile
diff --git a/tests/test_spec_validation.py b/tests/test_spec_validation.py
index f3fd032..f4cbb38 100644
--- a/tests/test_spec_validation.py
+++ b/tests/test_spec_validation.py
@@ -11,7 +11,10 @@
 
 def load_schema():
     """Load JSON schema from spec directory"""
-    repo_root = Path(__file__).parent.parent.parent
+    # __file__ is sdk-python/tests/test_spec_validation.py
+    # parent = sdk-python/tests/
+    # parent.parent = sdk-python/
+    repo_root = Path(__file__).parent.parent
     schema_path = repo_root / "spec" / "snapshot.schema.json"
     
     with open(schema_path) as f:
@@ -57,6 +60,7 @@ def validate_against_schema(data: dict, schema: dict) -> list:
     return errors
 
 
+@pytest.mark.requires_extension
 def test_snapshot_matches_spec():
     """Test that snapshot response matches spec schema"""
     schema = load_schema()