diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 165b3e672..0383856fe 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -64,13 +64,16 @@ validation above is its check. For code, profiles or platform files, these are
 the checks CI runs on a pull request (Python 3.12 or newer):
 
 ```bash
-pip install pyyaml "jsonschema[format-nongpl]" markdown
+pip install pyyaml "jsonschema[format-nongpl]" markdown pyte hypothesis vermin
 python scripts/validate_pr.py --changed          # the BIOS files the branch adds
 python scripts/validate_schemas.py --source-only # profiles and platform files
 python scripts/profile_sync.py --added --base upstream/main --strict  # each profile the branch adds
 python scripts/refresh_data_dirs.py  # data directories the pack-building tests read
 python scripts/generate_site.py       # the pages the site tests read
+npm ci --prefix website && npm run build --prefix website  # the built site, Node 24
 python -m unittest discover -s tests -t .
+python scripts/validate_site.py --site-dir website/dist  # links and page budgets
+vermin --no-tips -t=3.8- --violations install.py         # install.py stays on Python 3.8
 ```
 
 `upstream` is this repository as a remote of your fork
diff --git a/scripts/generate_readme.py b/scripts/generate_readme.py
index fb6bfa462..596f62d68 100644
--- a/scripts/generate_readme.py
+++ b/scripts/generate_readme.py
@@ -969,13 +969,16 @@ validation above is its check. For code, profiles or platform files, these are
 the checks CI runs on a pull request (Python 3.12 or newer):
 
 ```bash
-pip install pyyaml "jsonschema[format-nongpl]" markdown
+pip install pyyaml "jsonschema[format-nongpl]" markdown pyte hypothesis vermin
 python scripts/validate_pr.py --changed          # the BIOS files the branch adds
 python scripts/validate_schemas.py --source-only # profiles and platform files
 python scripts/profile_sync.py --added --base upstream/main --strict  # each profile the branch adds
 python scripts/refresh_data_dirs.py  # data directories the pack-building tests read
 python scripts/generate_site.py       # the pages the site tests read
+npm ci --prefix website && npm run build --prefix website  # the built site, Node 24
 python -m unittest discover -s tests -t .
+python scripts/validate_site.py --site-dir website/dist  # links and page budgets
+vermin --no-tips -t=3.8- --violations install.py         # install.py stays on Python 3.8
 ```
 
 `upstream` is this repository as a remote of your fork
diff --git a/tests/test_contributing_text.py b/tests/test_contributing_text.py
index 09392caea..bf00749aa 100644
--- a/tests/test_contributing_text.py
+++ b/tests/test_contributing_text.py
@@ -78,6 +78,25 @@ class BeforeOpeningAPullRequest(unittest.TestCase):
         self.assertIn("profile_sync.py --added --base upstream/main --strict", block)
         self.assertNotIn("--changed --strict", block)
 
+    def test_it_names_the_site_build_and_the_packages_ci_runs(self):
+        """A wiki-only change passed every listed check and failed CI on
+        validate_site.py, which the list did not name."""
+        text = generate_readme.generate_contributing()
+        section = text.split("## Before opening a PR", 1)[1].split("\n## ", 1)[0]
+        workflow = (REPO_ROOT / ".github" / "workflows" / "validate.yml").read_text(encoding="utf-8")
+        for command in ("npm ci --prefix website", "npm run build --prefix website",
+                        "validate_site.py --site-dir website/dist",
+                        "vermin --no-tips -t=3.8- --violations install.py"):
+            with self.subTest(command=command):
+                self.assertIn(command, workflow)
+                self.assertIn(command, section)
+        installed = re.search(r'^\s*run: pip install (pyyaml "jsonschema.*markdown.*)$',
+                              workflow, re.M).group(1)
+        pip_line = next(line for line in section.splitlines() if line.startswith("pip install"))
+        for package in (re.split(r"[\[=]", token.strip('"'))[0] for token in installed.split()):
+            with self.subTest(package=package):
+                self.assertRegex(pip_line, rf"\b{package}\b")
+
     def test_it_installs_what_the_checks_need_and_no_site_package(self):
         """The site is built by Node from website/package-lock.json: a pip
         line naming the old theme installed packages nothing reads."""