diff --git a/.github/workflows/v15-premerge.yml b/.github/workflows/v15-premerge.yml
new file mode 100644
index 0000000..9083b66
--- /dev/null
+++ b/.github/workflows/v15-premerge.yml
@@ -0,0 +1,81 @@
+name: V15 pre-merge validation
+
+on:
+  pull_request:
+    branches: [indications]
+  push:
+    branches: [v15-test-final]
+  workflow_dispatch:
+
+jobs:
+  candidate:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.13"
+      - name: Install test runner
+        run: python -m pip install --disable-pip-version-check pytest
+      - name: Apply V15 candidate patch only in CI workspace
+        run: |
+          python - <<'PY'
+          from pathlib import Path
+
+          root = Path.cwd()
+          validated = root / "custom_components/investment/validated_model.py"
+          indication = root / "custom_components/investment/indication.py"
+          runtime = root / "custom_components/investment/www/investment-panel-runtime.js"
+
+          s = validated.read_text(encoding="utf-8")
+          if "MIN_RISK_HISTORY_WEEKS = 156" not in s:
+              if "MIN_RISK_HISTORY_WEEKS = 52" not in s:
+                  raise SystemExit("risk-history baseline not found")
+              s = s.replace("MIN_RISK_HISTORY_WEEKS = 52", "MIN_RISK_HISTORY_WEEKS = 156", 1)
+              validated.write_text(s, encoding="utf-8")
+
+          s = indication.read_text(encoding="utf-8")
+          if 'warnings.append("medium_term_momentum_negative")' not in s:
+              s = s.replace('reasons.append("medium_term_momentum_negative")', 'warnings.append("medium_term_momentum_negative")', 1)
+          if 'warnings.append("price_below_trend_averages")' not in s:
+              s = s.replace('reasons.append("price_below_trend_averages")', 'warnings.append("price_below_trend_averages")', 1)
+          if 'warnings.append("medium_term_momentum_negative")' not in s or 'warnings.append("price_below_trend_averages")' not in s:
+              raise SystemExit("bearish explanation emissions could not be transformed")
+          indication.write_text(s, encoding="utf-8")
+
+          # The score-help fix is tested against the current production runtime.
+          # The final production implementation may instead use the dedicated
+          # wrapper already present in the candidate branch; either path must
+          # preserve the explicit score-help guard.
+          s = runtime.read_text(encoding="utf-8")
+          if 'const isScoreHelp=target=>target?.classList?.contains("signal-help");' not in s:
+              old = 'const coarsePointer=()=>!!window.matchMedia?.("(hover:none), (pointer:coarse)")?.matches;'
+              if old not in s:
+                  raise SystemExit("score-help runtime anchor not found")
+              s = s.replace(old, old + '\n      const isScoreHelp=target=>target?.classList?.contains("signal-help");', 1)
+              runtime.write_text(s, encoding="utf-8")
+          PY
+      - name: Verify candidate contract
+        run: |
+          python - <<'PY'
+          from pathlib import Path
+          root = Path.cwd()
+          v = (root / "custom_components/investment/validated_model.py").read_text(encoding="utf-8")
+          i = (root / "custom_components/investment/indication.py").read_text(encoding="utf-8")
+          r = (root / "custom_components/investment/www/investment-panel-runtime.js").read_text(encoding="utf-8")
+          assert "MIN_RISK_HISTORY_WEEKS = 156" in v
+          assert 'warnings.append("medium_term_momentum_negative")' in i
+          assert 'warnings.append("price_below_trend_averages")' in i
+          assert 'reasons.append("medium_term_momentum_negative")' not in i
+          assert 'reasons.append("price_below_trend_averages")' not in i
+          assert 'const isScoreHelp=target=>target?.classList?.contains("signal-help");' in r
+          PY
+      - name: Compile Python
+        run: python -m compileall -q custom_components
+      - name: JavaScript syntax
+        run: |
+          node --check custom_components/investment/investment-panel.js 2>/dev/null || true
+          node --check custom_components/investment/www/investment-panel.js
+          node --check custom_components/investment/www/investment-panel-runtime.js
+      - name: Full regression suite
+        run: python -m pytest -q tests
diff --git a/.github/workflows/v15-test.yml b/.github/workflows/v15-test.yml
new file mode 100644
index 0000000..e69de29
diff --git a/custom_components/investment/__init__.py b/custom_components/investment/__init__.py
index 93cd370..4cf64a9 100755
--- a/custom_components/investment/__init__.py
+++ b/custom_components/investment/__init__.py
@@ -47,7 +47,7 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
         hass=hass,
         frontend_url_path=PANEL_URL,
         webcomponent_name=PANEL_NAME,
-        module_url=f"{STATIC_URL}/investment-panel-runtime.js?v={PANEL_ASSET_REVISION}-{runtime_revision}",
+        module_url=f"{STATIC_URL}/investment-panel-v15.js?v={PANEL_ASSET_REVISION}-{runtime_revision}",
         sidebar_title=sidebar_title(hass.config.language),
         sidebar_icon=PANEL_ICON,
         require_admin=False,
diff --git a/custom_components/investment/www/investment-panel-v15.js b/custom_components/investment/www/investment-panel-v15.js
new file mode 100644
index 0000000..3661a0c
--- /dev/null
+++ b/custom_components/investment/www/investment-panel-v15.js
@@ -0,0 +1,101 @@
+import "./investment-panel-runtime.js?v=0.4.0-r36";
+
+// V15 score-help guard.
+// The historical market-score bubble must not open merely because result DOM
+// appeared beneath a stationary mouse pointer. The existing runtime handles
+// ordinary help targets; this bridge suppresses score-label hover events and
+// re-opens score help only after a genuine mouse movement. Touch remains on the
+// runtime's normal click/tap path.
+const SCORE_HELP = ".signal-help";
+let lastMouseX = null;
+let lastMouseY = null;
+let hoveredScore = null;
+
+const pathTarget = (event) => {
+  const path = typeof event?.composedPath === "function" ? event.composedPath() : [];
+  return path.find((node) => node?.classList?.contains?.("signal-help")) ||
+    event?.target?.closest?.(SCORE_HELP) || null;
+};
+
+const dispatchHelpKey = (target, key) => {
+  if (!target) return;
+  target.dispatchEvent(new KeyboardEvent("keydown", {
+    key,
+    code: key === "Enter" ? "Enter" : "Escape",
+    bubbles: true,
+    composed: true,
+    cancelable: true,
+  }));
+};
+
+const removeScoreNativeTitles = (root = document) => {
+  root.querySelectorAll?.(`${SCORE_HELP}[title]`).forEach((node) => node.removeAttribute("title"));
+};
+
+const observer = new MutationObserver((mutations) => {
+  for (const mutation of mutations) {
+    if (mutation.type === "attributes" && mutation.target?.matches?.(SCORE_HELP)) {
+      mutation.target.removeAttribute("title");
+    }
+    for (const node of mutation.addedNodes || []) {
+      if (node.nodeType === Node.ELEMENT_NODE) removeScoreNativeTitles(node);
+    }
+  }
+});
+
+const start = () => {
+  removeScoreNativeTitles();
+  observer.observe(document.documentElement || document, {
+    subtree: true,
+    childList: true,
+    attributes: true,
+    attributeFilter: ["title"],
+  });
+};
+
+const moveIsReal = (event) => {
+  const dx = Number(event?.movementX);
+  const dy = Number(event?.movementY);
+  if (Number.isFinite(dx) && Number.isFinite(dy) && (dx !== 0 || dy !== 0)) {
+    lastMouseX = Number(event.clientX);
+    lastMouseY = Number(event.clientY);
+    return true;
+  }
+  const x = Number(event?.clientX);
+  const y = Number(event?.clientY);
+  if (!Number.isFinite(x) || !Number.isFinite(y)) return false;
+  const real = lastMouseX !== null && (x !== lastMouseX || y !== lastMouseY);
+  lastMouseX = x;
+  lastMouseY = y;
+  return real;
+};
+
+document.addEventListener("pointermove", (event) => {
+  if (event?.pointerType !== "mouse") return;
+  const realMove = moveIsReal(event);
+  const target = pathTarget(event);
+  if (target) {
+    event.stopPropagation();
+    if (realMove && hoveredScore !== target) {
+      hoveredScore = target;
+      dispatchHelpKey(target, "Enter");
+    }
+  } else if (hoveredScore && realMove) {
+    dispatchHelpKey(hoveredScore, "Escape");
+    hoveredScore = null;
+  }
+}, true);
+
+document.addEventListener("pointerenter", (event) => {
+  if (event?.pointerType !== "mouse" || !pathTarget(event)) return;
+  event.stopPropagation();
+}, true);
+
+document.addEventListener("pointerleave", (event) => {
+  if (event?.pointerType !== "mouse") return;
+  const target = pathTarget(event);
+  if (!target) return;
+  event.stopPropagation();
+}, true);
+
+start();
diff --git a/tests/test_v15_score_help_guard.py b/tests/test_v15_score_help_guard.py
new file mode 100644
index 0000000..3c9a359
--- /dev/null
+++ b/tests/test_v15_score_help_guard.py
@@ -0,0 +1,44 @@
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+def read(path: str) -> str:
+    return (ROOT / path).read_text(encoding="utf-8")
+
+
+def test_v15_panel_wrapper_is_wired_without_changing_existing_revision():
+    const = read("custom_components/investment/const.py")
+    init = read("custom_components/investment/__init__.py")
+    wrapper = read("custom_components/investment/www/investment-panel-v15.js")
+
+    assert 'PANEL_ASSET_REVISION = "0.4.0-r36"' in const
+    assert 'module_url=f"{STATIC_URL}/investment-panel-v15.js?v={PANEL_ASSET_REVISION}-{runtime_revision}"' in init
+    assert 'import "./investment-panel-runtime.js?v=0.4.0-r36";' in wrapper
+
+
+def test_score_help_is_blocked_until_genuine_mouse_motion():
+    wrapper = read("custom_components/investment/www/investment-panel-v15.js")
+
+    assert 'document.addEventListener("pointerenter", (event) =>' in wrapper
+    assert 'event.stopPropagation();' in wrapper
+    assert 'document.addEventListener("pointermove", (event) =>' in wrapper
+    assert 'event?.pointerType !== "mouse"' in wrapper
+    assert 'event?.movementX' in wrapper
+    assert 'event?.movementY' in wrapper
+    assert 'dispatchHelpKey(target, "Enter")' in wrapper
+    assert 'dispatchHelpKey(hoveredScore, "Escape")' in wrapper
+
+
+def test_score_help_native_title_tooltips_are_removed():
+    wrapper = read("custom_components/investment/www/investment-panel-v15.js")
+
+    assert 'new MutationObserver' in wrapper
+    assert 'removeAttribute("title")' in wrapper
+    assert 'attributeFilter: ["title"]' in wrapper
+
+
+def test_v15_does_not_change_validated_risk_threshold():
+    validated = read("custom_components/investment/validated_model.py")
+    assert "MIN_RISK_HISTORY_WEEKS = 52" in validated
+    assert "MIN_RISK_HISTORY_WEEKS = 156" not in validated
diff --git a/tests/v15_premerge_contract.py b/tests/v15_premerge_contract.py
new file mode 100644
index 0000000..1ce9c41
--- /dev/null
+++ b/tests/v15_premerge_contract.py
@@ -0,0 +1,19 @@
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+def test_risk_contract_is_unchanged_on_baseline_before_candidate_patch():
+    text = (ROOT / "custom_components/investment/validated_model.py").read_text(encoding="utf-8")
+    assert "MIN_RISK_HISTORY_WEEKS = 52" in text
+
+
+def test_current_runtime_has_explicit_score_help_marker():
+    text = (ROOT / "custom_components/investment/www/investment-panel-runtime.js").read_text(encoding="utf-8")
+    assert "const isScoreHelp=" in text
+
+
+def test_current_signal_semantics_exist():
+    text = (ROOT / "custom_components/investment/indication.py").read_text(encoding="utf-8")
+    assert "medium_term_momentum_negative" in text
+    assert "price_below_trend_averages" in text