Extract authenticated coulomb.social design language via designlang

Session probe lands on /vw_pages (Research). Use main designlang extract
with --cookie-file — pack ignores auth. 39 artifacts under
docs/design-extract; tolerate designlang late summary crash when cores exist.

docs/design-extract-auth.md

@@ -113,11 +113,25 @@ Until a catalog id exists, treat this as:
 
 ## designlang auth flags (reference)
 
+**Important:** use the **main** `designlang <url>` command, not `designlang pack`.
+The `pack` subcommand ignores `--cookie-file` and crawls anonymously.
+
 ```bash
+# Prefer the wrapper (probes session, applies cookies, correct out dir):
+./scripts/run-design-extract.sh
+
+# Or manually:
 npx designlang https://coulomb.social \
   --cookie-file ~/.config/coulomb-social/auth/storage-state.json \
   -o docs/design-extract \
-  --depth 5
+  -n coulomb-social \
+  --wait 5000 \
+  --depth 2 \
+  --interactions
 ```
 
+Bubble reuses the same `coulomb_*` cookie **names** for guests and members.
+A real member session is verified by landing on an app route (e.g. `/vw_pages`)
+after load, not by cookie count.
+
 Chrome extension path (optional): log in in desktop Chrome, use designlang’s extension for a one-click handoff if you prefer not to use Playwright capture.