diff --git a/.github/workflows/dupehound.yml b/.github/workflows/dupehound.yml
new file mode 100644
index 00000000..5c177709
--- /dev/null
+++ b/.github/workflows/dupehound.yml
@@ -0,0 +1,58 @@
+name: dupehound
+
+on:
+  pull_request:
+    paths:
+      - 'src/**'
+      - 'tests/**'
+  push:
+    branches: [main]
+    paths:
+      - 'src/**'
+      - 'tests/**'
+
+permissions:
+  contents: read
+
+jobs:
+  check:
+    name: Block new duplicates
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    continue-on-error: true
+    steps:
+      - name: Checkout
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4
+        with:
+          fetch-depth: 0
+      - name: Install dupehound
+        run: |
+          curl -sL https://github.com/Rafaelpta/dupehound/releases/latest/download/dupehound-x86_64-unknown-linux-gnu.tar.gz | tar xz
+          sudo mv dupehound /usr/local/bin/
+      - name: Block new duplicates vs base
+        env:
+          PR_BASE: ${{ github.event.pull_request.base.ref }}
+        run: |
+          if [ -n "$PR_BASE" ]; then
+            dupehound check --diff "origin/$PR_BASE" .
+          else
+            dupehound check --diff HEAD~1 .
+          fi
+
+  scan:
+    name: Repo slop score
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - name: Checkout
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4
+      - name: Install dupehound
+        run: |
+          curl -sL https://github.com/Rafaelpta/dupehound/releases/latest/download/dupehound-x86_64-unknown-linux-gnu.tar.gz | tar xz
+          sudo mv dupehound /usr/local/bin/
+      - name: Scan
+        run: |
+          dupehound scan . | tee /tmp/dh-scan.txt
+          SCORE=$(grep -oE 'SLOP SCORE[[:space:]]+[0-9.]+%' /tmp/dh-scan.txt | head -1 | grep -oE '[0-9.]+%' || echo "n/a")
+          echo "## dupehound slop score" >> "$GITHUB_STEP_SUMMARY"
+          echo "**${SCORE}**" >> "$GITHUB_STEP_SUMMARY"
diff --git a/src/browser_harness/admin.py b/src/browser_harness/admin.py
index 83109c41..2b9cc047 100644
--- a/src/browser_harness/admin.py
+++ b/src/browser_harness/admin.py
@@ -7,27 +7,7 @@
 from pathlib import Path
 
 from . import _ipc as ipc
-
-
-def _load_env():
-    repo_root = Path(__file__).resolve().parents[2]
-    workspace = Path(os.environ.get("BH_AGENT_WORKSPACE", repo_root / "agent-workspace")).expanduser()
-    for p in (repo_root / ".env", workspace / ".env"):
-        if not p.exists():
-            continue
-        _load_env_file(p)
-
-
-def _load_env_file(p):
-    for line in p.read_text().splitlines():
-        line = line.strip()
-        if not line or line.startswith("#") or "=" not in line:
-            continue
-        k, v = line.split("=", 1)
-        os.environ.setdefault(k.strip(), v.strip().strip('"').strip("'"))
-
-
-_load_env()
+from .helpers import _load_env, _load_env_file
 
 NAME = os.environ.get("BU_NAME", "default")
 BU_API = "https://api.browser-use.com/api/v3"
diff --git a/src/browser_harness/daemon.py b/src/browser_harness/daemon.py
index 01edad1c..8b510eff 100644
--- a/src/browser_harness/daemon.py
+++ b/src/browser_harness/daemon.py
@@ -4,28 +4,9 @@
 from pathlib import Path
 
 from . import _ipc as ipc
-from cdp_use.client import CDPClient
-
-
-def _load_env():
-    repo_root = Path(__file__).resolve().parents[2]
-    workspace = Path(os.environ.get("BH_AGENT_WORKSPACE", repo_root / "agent-workspace")).expanduser()
-    for p in (repo_root / ".env", workspace / ".env"):
-        if not p.exists():
-            continue
-        _load_env_file(p)
-
+from .helpers import _load_env, _load_env_file
 
-def _load_env_file(p):
-    for line in p.read_text().splitlines():
-        line = line.strip()
-        if not line or line.startswith("#") or "=" not in line:
-            continue
-        k, v = line.split("=", 1)
-        os.environ.setdefault(k.strip(), v.strip().strip('"').strip("'"))
-
-
-_load_env()
+from cdp_use.client import CDPClient
 
 NAME = os.environ.get("BU_NAME", "default")
 SOCK = ipc.sock_addr(NAME)