From aa5a5082a0c9196c0687ca9d559ab5b64521841e Mon Sep 17 00:00:00 2001
From: goboss <goboss@frontend03>
Date: Tue, 5 May 2026 10:33:30 +0000
Subject: [PATCH] =?UTF-8?q?MIGRATION=5FPLAYBOOK:=20anti-pattern=20#0=20?=
 =?UTF-8?q?=E2=80=94=20copy=20SDK=20URLs=20=D0=B7=208148=20reference=20cre?=
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---
 docs/MIGRATION_PLAYBOOK.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/docs/MIGRATION_PLAYBOOK.md b/docs/MIGRATION_PLAYBOOK.md
index 6399137..ddf5012 100644
--- a/docs/MIGRATION_PLAYBOOK.md
+++ b/docs/MIGRATION_PLAYBOOK.md
@@ -169,6 +169,8 @@ Custom план залежно від спецификy. Документуй у
 
 ## Anti-patterns (не повторювати помилок 8161 migration)
 
+0. **Footprint — копіювати SDK URLs з 8148 reference.** ASG admin генерує **унікальний filename per spot** (`nDNVal3.js`, `9iO21Eb.js`, etc.) хоч content однаковий — anti-fingerprint feature. **При migration отримати з ASG admin per-site SDK URLs** (popunder + vast — 2 окремі), update `views/static/js/ad-config.js` `popunder.sdk` та `vast.sdk` per site. Інакше adblockers/fingerprints ловлять shared signature across all sites → easier to block. Discovery 2026-05-05: 14 sites + 8148 reference all мали same `nDNVal3.js`/`9iO21Eb.js` — global footprint.
+
 1. **Скопіювати foreign classes (`vdo-blk-lmtr`) тільки тому що 8148 так робить.** Site має native equivalent — використовуй його. R5 урок.
 2. **Append external JS file (`tb.append_script`) коли можна inline.** Зайвий HTTP request. R3 урок.
 3. **Edit тільки `index.css` без критичного `css_<page>.etlua`.** FOUC на first paint. Юзер скаржиться. Урок 2026-05-04.