diff --git a/scripts/check-phase33.sh b/scripts/check-phase33.sh
index 4eaeb7fe..f6c497c5 100755
--- a/scripts/check-phase33.sh
+++ b/scripts/check-phase33.sh
@@ -4,7 +4,7 @@
 # plugins, the four Nuxt layers and the applications that consume them.
 #
 # Stages:
-#   self-test  the go test -json and vitest detectors on planted output, a
+#   self-test  the go test -json, vitest and TAP detectors on planted output, a
 #              failing go test in a planted module, the marker rule on a
 #              planted repository, the missing-repository failure, the docker
 #              NOT RUN rule on a faked host, and the additive comparison on
@@ -18,12 +18,18 @@
 #              required name (*_UNIT_TESTS); npm run test (vitest) in
 #              sm-seo-plugin and sm-journal-plugin.
 #   layers     vue-seo-layer, vue-journal-layer, vue-menu-layer and
-#              vue-faq-layer: npm run test, npm run build:playground and the
-#              layer's SSR smoke; node testing/guard-check.mjs in
-#              vue-seo-layer (the build-guard fixtures).
+#              vue-faq-layer: npm run test (node --test, an all-passing TAP
+#              summary), npm run build:playground and the layer's SSR
+#              smokes; in vue-seo-layer guard:check (the build-guard
+#              fixtures) and purge:check; in vue-journal-layer every
+#              expectation file (expect-acme-title-h1 and -title-p with
+#              NUXT_PUBLIC_JOURNAL_POST_TITLE_TAG), the purge checks and
+#              check-git-install.sh --self-test.
 #   consumers  sm-demo-app, sm-grzybyfunkcjonalne-app, sm-summercmsio-app and
 #              sm-bm-app: the workspace check and go build ./...; npm run
-#              build in each Nuxt app (vue-*/ with a build script).
+#              build in each Nuxt app (vue-*/ with a build script); the
+#              33-12 and 33-13 app patches pass git apply --check, and the
+#              33-14 demo locale patches apply on top of the 33-12 ones.
 #   docker     Docker host only: the Postgres suites (go test ./... without
 #              -short) of the three Go plugins with the phase's suites by
 #              required name (*_DOCKER_TESTS; TestChromeRenderer too when a
@@ -404,6 +410,46 @@ npm_vitest() {
 	rm -f "$log"
 }
 
+# detect_tap reads a node --test --test-reporter=tap run. Exit 1 a failed
+# test ("not ok", "# fail" or "# cancelled" above 0), 2 skipped or todo
+# tests, 3 no all-passing summary.
+detect_tap() {
+	python3 - "$1" <<'PY'
+import re, sys
+text = open(sys.argv[1], encoding="utf-8", errors="replace").read()
+text = re.sub(r"\x1b\[[0-9;]*m", "", text)
+counts = {k: int(v) for k, v in re.findall(r"^# (tests|pass|fail|skipped|todo|cancelled) (\d+)\s*$", text, re.M)}
+if re.search(r"^\s*not ok\b", text, re.M) or counts.get("fail", 0) > 0 or counts.get("cancelled", 0) > 0:
+    print("refuse: TAP reports failed tests", file=sys.stderr)
+    sys.exit(1)
+if counts.get("skipped", 0) > 0 or counts.get("todo", 0) > 0 or re.search(r"^\s*ok .*# (SKIP|TODO)\b", text, re.M | re.I):
+    print("refuse: TAP reports skipped or todo tests", file=sys.stderr)
+    sys.exit(2)
+if "fail" not in counts or counts.get("pass", 0) == 0 or counts.get("tests", -1) != counts.get("pass"):
+    print("refuse: no all-passing TAP summary", file=sys.stderr)
+    sys.exit(3)
+PY
+}
+
+# node_tap DIR runs npm run test (node --test with the TAP reporter) in DIR
+# and requires an all-passing TAP summary.
+node_tap() {
+	local dir="$1" log rc=0 dc=0
+	require_script "$dir" test
+	log="$(mktemp)"
+	npm --prefix "$dir" run test >"$log" 2>&1 || rc=$?
+	detect_tap "$log" || dc=$?
+	if [[ "$rc" -ne 0 || "$dc" -ne 0 ]]; then
+		grep -E '^\s*not ok|# (fail|skipped|todo)|Error' "$log" | head -n 40 >&2 || true
+		tail -n 20 "$log" >&2
+		rm -f "$log"
+		echo "refuse: npm run test in $dir (test=$rc detect=$dc)" >&2
+		return 1
+	fi
+	echo "tap: $dir $(grep -E '^# (tests|pass|fail) ' "$log" | tr '\n' ' ')"
+	rm -f "$log"
+}
+
 # require_script DIR NAME refuses DIR without node_modules or without the
 # npm script NAME in its package.json.
 require_script() {
@@ -515,6 +561,25 @@ run_self_test() {
 	expect_detector detect_vitest failed 1 ' Test Files  1 failed | 1 passed (2)
       Tests  1 failed | 16 passed (17)'
 	expect_detector detect_vitest no-summary 3 ' ✓ tests/a.test.ts (12 tests) 15ms'
+	local tap='TAP version 13
+ok 1 - a
+ok 2 - b
+1..2
+# tests 2
+# suites 0
+# pass 2
+# fail 0
+# cancelled 0
+# skipped 0
+# todo 0'
+	expect_detector detect_tap pass 0 "$tap"
+	expect_detector detect_tap not-ok 1 "${tap/ok 2 - b/not ok 2 - b}"
+	expect_detector detect_tap fail-count 1 "${tap/\# fail 0/\# fail 1}"
+	expect_detector detect_tap skipped 2 "${tap/\# skipped 0/\# skipped 1}"
+	expect_detector detect_tap skip-directive 2 "${tap/ok 2 - b/ok 2 - b # SKIP not here}"
+	expect_detector detect_tap no-summary 3 'TAP version 13
+ok 1 - a'
+	expect_detector detect_tap zero 3 "$(printf '# tests 0\n# pass 0\n# fail 0')"
 
 	local tmp
 	tmp="$(mktemp -d)"
@@ -695,14 +760,29 @@ run_layers() {
 	local layer
 	require_all "Nuxt layer" "$SEO_LAYER" "$JOURNAL_LAYER" "$MENU_LAYER" "$FAQ_LAYER"
 	for layer in "$SEO_LAYER" "$JOURNAL_LAYER" "$MENU_LAYER" "$FAQ_LAYER"; do
-		npm_vitest "$layer"
+		node_tap "$layer"
 		npm_script "$layer" build:playground
 	done
+	# vue-seo-layer: every smoke expectation (the layer on, off, the CMS
+	# down, without the 404 token, with drift), the build-guard fixtures
+	# and the purge checks.
 	npm_script "$SEO_LAYER" smoke:ssr
-	node_run "$JOURNAL_LAYER" testing/smoke-ssr.mjs --output .playground/.output --fixtures testing/fixtures/acme --expect testing/expect-acme.txt
+	npm_script "$SEO_LAYER" guard:check
+	npm_script "$SEO_LAYER" purge:check
+	# vue-journal-layer: the acme expectations, the post title forced to h1
+	# and to p (postTitleTag), the link hint and the breadcrumbs off, the
+	# purge checks and the git-install lockfile reading.
+	local journal_smoke=(testing/smoke-ssr.mjs --output .playground/.output --fixtures testing/fixtures/acme)
+	node_run "$JOURNAL_LAYER" "${journal_smoke[@]}" --expect testing/expect-acme.txt
+	node_run "$JOURNAL_LAYER" "${journal_smoke[@]}" --expect testing/expect-acme-title-h1.txt --env NUXT_PUBLIC_JOURNAL_POST_TITLE_TAG=h1
+	node_run "$JOURNAL_LAYER" "${journal_smoke[@]}" --expect testing/expect-acme-title-p.txt --env NUXT_PUBLIC_JOURNAL_POST_TITLE_TAG=p
+	node_run "$JOURNAL_LAYER" "${journal_smoke[@]}" --expect testing/expect-acme-hint-off.txt --env NUXT_PUBLIC_SEO_LINKS_NEW_TAB_HINT=false
+	node_run "$JOURNAL_LAYER" "${journal_smoke[@]}" --expect testing/expect-acme-breadcrumbs-off.txt --env NUXT_PUBLIC_JOURNAL_BREADCRUMBS=false
+	node_run "$JOURNAL_LAYER" testing/purge-check.mjs --output .playground/.output --fixtures testing/fixtures/acme --kind post --slug hello-acme --path /blog/hello-acme
+	node_run "$JOURNAL_LAYER" testing/purge-token-check.mjs --output .playground/.output --fixtures testing/fixtures/acme --path /blog/hello-acme
+	(cd "$JOURNAL_LAYER" && bash scripts/check-git-install.sh --self-test)
 	npm_script "$MENU_LAYER" smoke:ssr
 	npm_script "$FAQ_LAYER" smoke:ssr
-	node_run "$SEO_LAYER" testing/guard-check.mjs
 	echo "phase33 layers passed"
 }
 
@@ -718,9 +798,54 @@ run_consumers() {
 			npm_script "$(dirname "$pkg")" build
 		done
 	done
+	# The app patches of plans 33-12, 33-13 and 33-14 apply to the apps as
+	# committed; 33-14's demo locale patches apply on top of the 33-12 demo
+	# patches (checked in scratch worktrees).
+	patch_check "$DEMO_APP" 33-12-sm-demo-app.patch
+	patch_check "$DEMO_APP/vue-demo-app" 33-12-vue-demo-app.patch
+	patch_check "$SUMMERCMSIO_APP" 33-12-sm-summercmsio-app.patch
+	patch_check "$SUMMERCMSIO_APP/vue-summercmsio-app" 33-12-vue-summercmsio-app.patch
+	patch_check "$GRZYBY_APP" 33-13-sm-grzybyfunkcjonalne-app.patch
+	patch_check "$GRZYBY_APP/vue-grzybyfunkcjonalne-app" 33-13-vue-grzybyfunkcjonalne-app.patch
+	scratch_init
+	stacked_patch_check "$DEMO_APP/vue-demo-app" 33-12-vue-demo-app.patch 33-14-vue-demo-app-locale.patch
+	if [[ -f "$PHASE_DIR/33-14-sm-demo-app-locale.patch" ]]; then
+		stacked_patch_check "$DEMO_APP" 33-12-sm-demo-app.patch 33-14-sm-demo-app-locale.patch
+	fi
 	echo "phase33 consumers passed"
 }
 
+# PHASE_DIR holds the app patches.
+PHASE_DIR="$ROOT/.planning/phases/33-seo-output-audit-and-content"
+
+# patch_check REPO PATCH runs git apply --check of a phase patch in REPO
+# (--allow-empty: an empty patch, such as summercms.io's Go side, passes).
+patch_check() {
+	local repo="$1" patch="$PHASE_DIR/$2"
+	require_dir "$repo" "patch target"
+	require_file "$patch" "app patch"
+	if ! git -C "$repo" apply --check --allow-empty "$patch"; then
+		echo "refuse: $2 does not apply to $repo" >&2
+		return 1
+	fi
+	echo "patch: $2 applies to $repo"
+}
+
+# stacked_patch_check REPO BASE PATCH applies BASE in a scratch worktree of
+# REPO's HEAD and runs git apply --check of PATCH on top of it.
+stacked_patch_check() {
+	local repo="$1" base="$PHASE_DIR/$2" patch="$PHASE_DIR/$3" wt
+	require_file "$base" "app patch"
+	require_file "$patch" "app patch"
+	wt="$SCRATCH/stack-$(basename "$repo")-$RANDOM"
+	add_worktree "$repo" "$wt" HEAD
+	if ! git -C "$wt" apply --allow-empty "$base" || ! git -C "$wt" apply --check --allow-empty "$patch"; then
+		echo "refuse: $3 does not apply to $repo with $2" >&2
+		return 1
+	fi
+	echo "patch: $3 applies to $repo on top of $2"
+}
+
 docker_up() {
 	command -v docker >/dev/null 2>&1 && docker info >/dev/null 2>&1
 }