diff --git a/backend/app/config.py b/backend/app/config.py
index 4561504..38962a1 100644
--- a/backend/app/config.py
+++ b/backend/app/config.py
@@ -107,6 +107,11 @@ class Settings(BaseSettings):
     STALE_THRESHOLD_DAYS: int = 365  # days before coverage is considered stale
 
     # ── Reporting ─────────────────────────────────────────────────────
+    # PDF/DOCX/HTML report generation (professional_reports router) is
+    # unfinished — the frontend hides the Reports UI entirely. Defaults
+    # off so a fresh deploy returns a clean 503 instead of a raw 500 from
+    # a half-working render pipeline (e.g. missing weasyprint system deps).
+    REPORTS_ENABLED: bool = False
     REPORT_TEMPLATES_DIR: str = "app/templates/reports"
     # Assign REPORT_OUTPUT_DIR = "/tmp/aegis_reports"
     REPORT_OUTPUT_DIR: str = "/app/reports"
diff --git a/backend/app/routers/professional_reports.py b/backend/app/routers/professional_reports.py
index c15e6d1..98bd810 100644
--- a/backend/app/routers/professional_reports.py
+++ b/backend/app/routers/professional_reports.py
@@ -40,6 +40,18 @@ def _assert_safe_report_path(filepath: str) -> str:
         raise HTTPException(status_code=500, detail="Report generation path error")
     return filepath
 
+
+def _assert_reports_enabled() -> None:
+    """Raise a clean 503 while report generation is unfinished/disabled.
+
+    The frontend hides the Reports UI entirely; without this guard, hitting
+    these endpoints directly falls through to whatever the underlying
+    render pipeline raises (e.g. missing weasyprint system deps) as a raw,
+    unhelpful 500.
+    """
+    if not settings.REPORTS_ENABLED:
+        raise HTTPException(status_code=503, detail="Report generation is not yet available on this platform")
+
 # Assign router = APIRouter(prefix="/reports/generate", tags=["professional-reports"])
 router = APIRouter(prefix="/reports/generate", tags=["professional-reports"])
 
@@ -72,6 +84,7 @@ def generate_purple_report(
     user: User = Depends(require_any_role("red_lead", "blue_lead", "viewer")),
 ) -> FileResponse:
     """Generate a Purple Team campaign assessment report."""
+    _assert_reports_enabled()
     # Assign filepath = report_generation_service.generate_purple_campaign_report(
     filepath = report_generation_service.generate_purple_campaign_report(
         db, str(campaign_id), output_format=format,
@@ -102,6 +115,7 @@ def generate_coverage_report(
     user: User = Depends(require_any_role("red_lead", "blue_lead", "viewer")),
 ) -> FileResponse:
     """Generate an organization-wide MITRE ATT&CK coverage report."""
+    _assert_reports_enabled()
     # Assign filepath = report_generation_service.generate_coverage_report(
     filepath = report_generation_service.generate_coverage_report(
         db, output_format=format,
@@ -132,6 +146,7 @@ def generate_executive_report(
     user: User = Depends(require_any_role("red_lead", "blue_lead", "viewer")),
 ) -> FileResponse:
     """Generate an executive security summary report."""
+    _assert_reports_enabled()
     # Assign filepath = report_generation_service.generate_executive_summary(
     filepath = report_generation_service.generate_executive_summary(
         db, output_format=format,
@@ -162,6 +177,7 @@ def generate_quarterly_report(
     user: User = Depends(require_any_role("red_lead", "blue_lead", "viewer")),
 ) -> FileResponse:
     """Generate a quarterly security summary report."""
+    _assert_reports_enabled()
     # Assign filepath = report_generation_service.generate_quarterly_summary(
     filepath = report_generation_service.generate_quarterly_summary(
         db, output_format=format,
@@ -194,6 +210,7 @@ def generate_technique_report(
     user: User = Depends(get_current_user),
 ) -> FileResponse:
     """Generate a detailed report for one MITRE technique."""
+    _assert_reports_enabled()
     # Assign filepath = report_generation_service.generate_technique_detail_report(
     filepath = report_generation_service.generate_technique_detail_report(
         db, str(technique_id), output_format=format,
diff --git a/backend/app/routers/scores.py b/backend/app/routers/scores.py
index 1fd91ad..691e9f4 100644
--- a/backend/app/routers/scores.py
+++ b/backend/app/routers/scores.py
@@ -165,7 +165,7 @@ def score_history(
     db: Session = Depends(get_db),
     # Entry: current_user
     current_user: User = Depends(get_current_user),
-) -> dict:
+) -> list:
     """Get historical score data points (weekly).
 
     Args:
@@ -174,7 +174,7 @@ def score_history(
         current_user (User): Authenticated user making the request.
 
     Returns:
-        dict: Weekly score data points for the requested period.
+        list: Weekly score data points for the requested period.
     """
     # Return get_score_history(db, period)
     return get_score_history(db, period)
diff --git a/backend/tests/test_professional_reports_router.py b/backend/tests/test_professional_reports_router.py
index f1190b3..702dc09 100644
--- a/backend/tests/test_professional_reports_router.py
+++ b/backend/tests/test_professional_reports_router.py
@@ -16,7 +16,8 @@ def test_purple_campaign_pdf_download(mock_gen, client, auth_headers, db):
             f.write(b"%PDF-1.4 fake")
         mock_gen.return_value = fake_pdf
 
-        with patch.object(settings, "REPORT_OUTPUT_DIR", tmpdir):
+        with patch.object(settings, "REPORT_OUTPUT_DIR", tmpdir), \
+             patch.object(settings, "REPORTS_ENABLED", True):
             campaign = Campaign(name="Export Camp", status="active")
             db.add(campaign)
             db.commit()
@@ -38,7 +39,8 @@ def test_coverage_summary_html(mock_gen, client, auth_headers):
             f.write("<html><body>ok</body></html>")
         mock_gen.return_value = fake_html
 
-        with patch.object(settings, "REPORT_OUTPUT_DIR", tmpdir):
+        with patch.object(settings, "REPORT_OUTPUT_DIR", tmpdir), \
+             patch.object(settings, "REPORTS_ENABLED", True):
             r = client.get(
                 "/api/v1/reports/generate/coverage-summary",
                 params={"format": "html"},
@@ -46,3 +48,15 @@ def test_coverage_summary_html(mock_gen, client, auth_headers):
             )
     assert r.status_code == 200
     assert "text/html" in r.headers["content-type"]
+
+
+def test_reports_disabled_by_default_returns_503(client, auth_headers):
+    """Reports are unfinished — the frontend hides the UI entirely, and the
+    backend must refuse cleanly rather than let a half-working render
+    pipeline (e.g. missing weasyprint system deps) surface a raw 500."""
+    r = client.get(
+        "/api/v1/reports/generate/coverage-summary",
+        params={"format": "pdf"},
+        headers=auth_headers,
+    )
+    assert r.status_code == 503
diff --git a/backend/tests/test_scores_history.py b/backend/tests/test_scores_history.py
new file mode 100644
index 0000000..471ff54
--- /dev/null
+++ b/backend/tests/test_scores_history.py
@@ -0,0 +1,19 @@
+"""GET /scores/history returns a list of weekly data points — regression
+test for a response-model mismatch (endpoint annotated -> dict while the
+service actually returns a list, causing a raw 500 on serialization)."""
+
+
+def test_scores_history_returns_a_list(client, auth_headers):
+    resp = client.get("/api/v1/scores/history", headers=auth_headers)
+    assert resp.status_code == 200, resp.text
+    body = resp.json()
+    assert isinstance(body, list)
+
+
+def test_scores_history_accepts_all_periods(client, auth_headers):
+    for period in ("30d", "90d", "1y"):
+        resp = client.get(
+            "/api/v1/scores/history", params={"period": period}, headers=auth_headers,
+        )
+        assert resp.status_code == 200, resp.text
+        assert isinstance(resp.json(), list)