diff --git a/docs/developer-testing-guidelines.md b/docs/developer-testing-guidelines.md
index d85c670..61abd75 100644
--- a/docs/developer-testing-guidelines.md
+++ b/docs/developer-testing-guidelines.md
@@ -54,6 +54,21 @@ Use `-q` for a compact summary and `-v` to see individual test names.
 ./venv/bin/python -m pytest tests/ -q
 ```
 
+### Web UI suite (#436)
+
+Hermetic unittest modules matching `test_webui_*.py` cover route rendering,
+read-only guards, registry/prompt/queue loaders, and optional child-issue
+modules when present on the branch.
+
+```bash
+./scripts/test-webui
+./scripts/ci-webui-check          # skip unless the diff touches web UI paths
+WEBUI_CI_FORCE=1 ./scripts/ci-webui-check
+```
+
+Wire `scripts/ci-webui-check` into Jenkins (or equivalent) for PRs that touch
+`webui/`, `tests/test_webui_*`, or `docs/webui*`.
+
 ### Run targeted tests
 
 ```bash
diff --git a/docs/webui-local-dev.md b/docs/webui-local-dev.md
index 990914e..c1eafc6 100644
--- a/docs/webui-local-dev.md
+++ b/docs/webui-local-dev.md
@@ -140,4 +140,25 @@ no tokens or MCP restart actions are exposed.
 pytest tests/test_webui_skeleton.py tests/test_webui_project_registry.py tests/test_webui_prompt_library.py tests/test_webui_queue_dashboard.py tests/test_webui_gated_actions.py -q
 pytest tests/test_webui_skeleton.py tests/test_webui_project_registry.py tests/test_webui_prompt_library.py tests/test_webui_queue_dashboard.py tests/test_webui_audit.py tests/test_webui_worktree_hygiene.py -q
 pytest tests/test_webui_skeleton.py tests/test_webui_project_registry.py tests/test_webui_prompt_library.py tests/test_webui_queue_dashboard.py tests/test_webui_lease_visibility.py tests/test_webui_runtime_health.py -q
+
+## Tests (#436)
+
+Run the full hermetic web UI suite (all `test_webui_*.py` modules):
+
+```bash
+./scripts/test-webui
+```
+
+CI / Jenkins multibranch can call the path-filtered gate (runs only when the
+diff touches `webui/`, `tests/test_webui_*`, or web UI docs/scripts):
+
+```bash
+./scripts/ci-webui-check
+WEBUI_CI_FORCE=1 ./scripts/ci-webui-check   # always run
+```
+
+Or invoke unittest directly:
+
+```bash
+python3 -m unittest discover -s tests -p 'test_webui_*.py' -q
 ```
\ No newline at end of file
diff --git a/scripts/ci-webui-check b/scripts/ci-webui-check
new file mode 100755
index 0000000..a679993
--- /dev/null
+++ b/scripts/ci-webui-check
@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+# Path-filtered CI gate for the internal web UI (#436).
+# Runs the hermetic web UI unittest suite when a change touches UI surfaces.
+set -euo pipefail
+
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+repo_root="$(cd "$script_dir/.." && pwd)"
+cd "$repo_root"
+
+if [[ "${WEBUI_CI_FORCE:-}" == "1" ]]; then
+  exec "$script_dir/test-webui"
+fi
+
+base_ref="${WEBUI_CI_BASE_REF:-}"
+if [[ -z "$base_ref" ]]; then
+  if git rev-parse --verify prgs/master >/dev/null 2>&1; then
+    base_ref="$(git merge-base HEAD prgs/master 2>/dev/null || true)"
+  fi
+  if [[ -z "$base_ref" ]]; then
+    base_ref="${GITHUB_BASE_REF:-${CHANGE_TARGET:-master}}"
+    if git rev-parse --verify "origin/$base_ref" >/dev/null 2>&1; then
+      base_ref="$(git merge-base HEAD "origin/$base_ref")"
+    elif git rev-parse --verify "$base_ref" >/dev/null 2>&1; then
+      base_ref="$(git merge-base HEAD "$base_ref")"
+    else
+      base_ref="HEAD~1"
+    fi
+  fi
+fi
+
+changed="$(git diff --name-only "$base_ref" HEAD 2>/dev/null || true)"
+if [[ -z "$changed" ]]; then
+  echo "ci-webui-check: no changed files vs $base_ref; skipping web UI suite"
+  exit 0
+fi
+
+python_bin="${WEBUI_TEST_PYTHON:-python3}"
+if [[ -x "$repo_root/venv/bin/python" ]]; then
+  python_bin="$repo_root/venv/bin/python"
+fi
+
+if printf '%s\n' "$changed" | "$python_bin" -c "
+import sys
+from webui.ci_paths import should_run_webui_ci
+paths = [line.strip() for line in sys.stdin if line.strip()]
+raise SystemExit(0 if should_run_webui_ci(paths) else 1)
+"; then
+  echo "ci-webui-check: web UI surface changed; running suite"
+  exec "$script_dir/test-webui"
+fi
+
+echo "ci-webui-check: no web UI paths in diff; skipping suite"
+exit 0
\ No newline at end of file
diff --git a/scripts/test-webui b/scripts/test-webui
new file mode 100755
index 0000000..d7d4e31
--- /dev/null
+++ b/scripts/test-webui
@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+set -euo pipefail
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+repo_root="$(cd "$script_dir/.." && pwd)"
+cd "$repo_root"
+
+python_bin="${WEBUI_TEST_PYTHON:-python3}"
+if [[ -x "$repo_root/venv/bin/python" ]]; then
+  python_bin="$repo_root/venv/bin/python"
+fi
+
+pattern="${WEBUI_TEST_PATTERN:-test_webui_*.py}"
+exec "$python_bin" -m unittest discover -s tests -p "$pattern" "$@"
\ No newline at end of file
diff --git a/tests/test_webui_ci_gate.py b/tests/test_webui_ci_gate.py
new file mode 100644
index 0000000..2f4a577
--- /dev/null
+++ b/tests/test_webui_ci_gate.py
@@ -0,0 +1,54 @@
+"""Tests for web UI CI path-filter gate (#436)."""
+import os
+import subprocess
+import sys
+import unittest
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
+
+from webui.ci_paths import should_run_webui_ci, touches_webui_surface
+
+_REPO_ROOT = Path(__file__).resolve().parent.parent
+
+
+class TestCiPathMatching(unittest.TestCase):
+    def test_positive_paths(self):
+        for path in (
+            "webui/app.py",
+            "tests/test_webui_skeleton.py",
+            "docs/webui-local-dev.md",
+            "scripts/test-webui",
+        ):
+            with self.subTest(path=path):
+                self.assertTrue(touches_webui_surface(path))
+
+    def test_negative_paths(self):
+        for path in ("mcp_server.py", "tests/test_mcp_server.py", "README.md"):
+            with self.subTest(path=path):
+                self.assertFalse(touches_webui_surface(path))
+
+    def test_should_run_aggregate(self):
+        self.assertTrue(should_run_webui_ci(["README.md", "webui/layout.py"]))
+        self.assertFalse(should_run_webui_ci(["mcp_server.py", "gitea_auth.py"]))
+
+
+class TestCiRunnerScript(unittest.TestCase):
+    def test_test_webui_smoke(self):
+        script = _REPO_ROOT / "scripts" / "test-webui"
+        result = subprocess.run(
+            ["bash", str(script), "-q"],
+            cwd=_REPO_ROOT,
+            capture_output=True,
+            text=True,
+            timeout=60,
+            env={
+                **os.environ,
+                "WEBUI_TEST_PATTERN": "test_webui_skeleton.py",
+            },
+        )
+        self.assertEqual(result.returncode, 0, result.stderr or result.stdout)
+
+
+if __name__ == "__main__":
+    unittest.main()
\ No newline at end of file
diff --git a/tests/test_webui_mvp_suite.py b/tests/test_webui_mvp_suite.py
new file mode 100644
index 0000000..2d5bd54
--- /dev/null
+++ b/tests/test_webui_mvp_suite.py
@@ -0,0 +1,156 @@
+"""Consolidated MVP coverage for the internal web UI (#436)."""
+from __future__ import annotations
+
+import importlib
+import os
+import sys
+import unittest
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
+
+from starlette.testclient import TestClient
+from starlette.routing import Route
+
+from webui.app import create_app
+
+_REPO_ROOT = Path(__file__).resolve().parent.parent
+
+# HTML pages and JSON exports registered on master MVP.
+MVP_GET_ROUTES: tuple[tuple[str, str | tuple[str, ...]], ...] = (
+    ("/", "Operator console"),
+    ("/health", "mcp-control-plane-webui"),
+    ("/queue", "Live queue"),
+    ("/api/queue", ("prs", "issues")),
+    ("/projects", "Gitea-Tools"),
+    ("/api/projects", "projects"),
+    ("/prompts", "Prompt library"),
+    ("/api/prompts", "prompts"),
+    ("/runtime", "Runtime"),
+    ("/audit", "Audit"),
+    ("/worktrees", "Worktrees"),
+    ("/leases", "Leases"),
+)
+
+MUTATION_METHODS = ("POST", "PUT", "PATCH", "DELETE")
+
+
+def _import_optional(module_name: str):
+    try:
+        return importlib.import_module(module_name)
+    except ImportError:
+        return None
+
+
+class TestWebuiServerStartup(unittest.TestCase):
+    def test_create_app_imports_cleanly(self):
+        app = create_app()
+        self.assertIsNotNone(app)
+
+    def test_main_module_imports(self):
+        import webui.__main__ as main_mod
+
+        self.assertTrue(callable(main_mod.main))
+
+
+class TestWebuiRouteRendering(unittest.TestCase):
+    def setUp(self):
+        self.client = TestClient(create_app())
+
+    def test_all_mvp_get_routes_render(self):
+        for path, needle in MVP_GET_ROUTES:
+            with self.subTest(path=path):
+                response = self.client.get(path)
+                self.assertEqual(response.status_code, 200, path)
+                if path == "/health":
+                    assert isinstance(needle, str)
+                    self.assertEqual(response.json()["service"], needle)
+                elif path.startswith("/api/"):
+                    data = response.json()
+                    if isinstance(needle, tuple):
+                        for key in needle:
+                            self.assertIn(key, data)
+                    else:
+                        self.assertIn(needle, data)
+                else:
+                    assert isinstance(needle, str)
+                    self.assertIn(needle, response.text)
+
+    def test_registered_routes_include_mvp_paths(self):
+        app = create_app()
+        get_paths = {
+            route.path
+            for route in app.routes
+            if isinstance(route, Route) and "GET" in route.methods
+        }
+        for path, _ in MVP_GET_ROUTES:
+            with self.subTest(path=path):
+                self.assertIn(path, get_paths)
+
+
+class TestWebuiReadOnlyGuards(unittest.TestCase):
+    def setUp(self):
+        self.client = TestClient(create_app())
+
+    def test_mutation_methods_rejected_on_core_paths(self):
+        paths = ("/health", "/queue", "/projects", "/prompts", "/api/queue")
+        for path in paths:
+            for method in MUTATION_METHODS:
+                with self.subTest(path=path, method=method):
+                    response = self.client.request(method, path)
+                    self.assertEqual(response.status_code, 405)
+                    self.assertEqual(response.json()["error"], "read-only-mvp")
+
+
+class TestWebuiOptionalModules(unittest.TestCase):
+    """Exercise child-issue modules when present on the branch under test."""
+
+    def test_audit_validator_basics_when_present(self):
+        mod = _import_optional("webui.audit_validator")
+        if mod is None:
+            self.skipTest("webui.audit_validator not merged on this branch")
+        report = "## Controller Handoff\n- Task: review PR #1\n"
+        self.assertEqual(mod.infer_task_kind(report), "review_pr")
+        result = mod.audit_report(report)
+        self.assertIn("grade", result)
+
+    def test_gated_actions_fail_closed_when_present(self):
+        mod = _import_optional("webui.gated_actions")
+        if mod is None:
+            self.skipTest("webui.gated_actions not merged on this branch")
+        registry = mod.build_action_registry()
+        for action in registry.actions:
+            with self.subTest(action=action.action_id):
+                self.assertFalse(action.enabled)
+        result = mod.attempt_action("merge_pr", pr_number=1)
+        self.assertFalse(result["success"])
+
+    def test_deployment_boundary_when_present(self):
+        mod = _import_optional("webui.deployment_boundary")
+        if mod is None:
+            self.skipTest("webui.deployment_boundary not merged on this branch")
+        assessment = mod.assess_bind_host("0.0.0.0")
+        self.assertEqual(assessment.disposition, "refuse")
+
+
+class TestWebuiTestInventory(unittest.TestCase):
+    def test_webui_test_modules_exist(self):
+        modules = sorted(_REPO_ROOT.glob("tests/test_webui_*.py"))
+        names = [path.name for path in modules]
+        self.assertIn("test_webui_skeleton.py", names)
+        self.assertIn("test_webui_project_registry.py", names)
+        self.assertIn("test_webui_prompt_library.py", names)
+        self.assertIn("test_webui_queue_dashboard.py", names)
+        self.assertGreaterEqual(len(names), 5)
+
+
+class TestWebuiCiScripts(unittest.TestCase):
+    def test_runner_scripts_exist(self):
+        for name in ("test-webui", "ci-webui-check"):
+            script = _REPO_ROOT / "scripts" / name
+            self.assertTrue(script.is_file(), name)
+            self.assertTrue(os.access(script, os.X_OK), name)
+
+
+if __name__ == "__main__":
+    unittest.main()
\ No newline at end of file
diff --git a/webui/ci_paths.py b/webui/ci_paths.py
new file mode 100644
index 0000000..779acf4
--- /dev/null
+++ b/webui/ci_paths.py
@@ -0,0 +1,20 @@
+"""Path filters for web UI CI gating (#436)."""
+
+from __future__ import annotations
+
+import re
+from collections.abc import Iterable
+
+_WEBUI_TOUCH_RE = re.compile(
+    r"^(?:webui/|tests/test_webui_|docs/webui|scripts/(?:run-webui|test-webui|ci-webui-check)$)"
+)
+
+
+def touches_webui_surface(path: str) -> bool:
+    """Return True when *path* is a web UI surface file."""
+    return bool(_WEBUI_TOUCH_RE.match(path.strip()))
+
+
+def should_run_webui_ci(changed_paths: Iterable[str]) -> bool:
+    """Return True when any changed path should trigger the web UI test suite."""
+    return any(touches_webui_surface(path) for path in changed_paths)
\ No newline at end of file