diff --git a/tests/vault/gear/activity-detector-test.cpp b/tests/vault/gear/activity-detector-test.cpp
index dd6d8b990..65e5e1c93 100644
--- a/tests/vault/gear/activity-detector-test.cpp
+++ b/tests/vault/gear/activity-detector-test.cpp
@@ -182,6 +182,7 @@ namespace test {
                          .beforeInvocation ("mockJob").timeArg(nominal + Time{FSecs{5}})        // matching first invocation and then second...
                          .afterSeqIncrement(1)                                                  // note: searching backwards from the 2nd invocation
                          );
+//        cout << detector.showLog()<<endl; // HINT: use this for investigation...
         }
       
       
@@ -325,13 +326,36 @@ namespace test {
       
       
       
-      /** @test TODO diagnostic setup to detect Activity activation and propagation
-       * @todo WIP 8/23 🔁 define ⟶ implement
+      /** @test diagnostic setup to detect passing a notification
+       *        - setup a chain-Activity (here: a `TICK`) protected by a `GATE`
+       *        - configure the `GATE` to require one notification
+       *        - connect a `NOTIFY`-Activity to trigger the `GATE`
+       *        - inject a diagnostics Tap into the notification-connection
+       *        - dispatch of the notification can be verified
+       *        - notification has been passed through the Tap to the `GATE`
+       *        - `GATE` has been decremented to zero and triggers chain
+       *        - finally the chained `TICK`-Activity calls into the `executionCtx` 
+       * @todo WIP 8/23 ✔ define 🔁 implement
        */
       void
       watch_notification()
         {
           ActivityDetector detector;
+          
+          Activity chain;
+          Activity gate{1};
+          gate.next = &chain;
+          Activity notification{&gate};
+          CHECK (gate.data_.condition.rest == 1);
+          
+          detector.insertActivationTap (notification.data_.notification.target);
+          
+          Time tt{11,11};
+          notification.dispatch (tt, detector.executionCtx);
+          
+          CHECK (detector.verifyInvocation("tap-GATE").arg("11.011 --notify-↯> Act(GATE")
+                         .beforeInvocation("CTX-post").arg("11.011", "Act(TICK", "≺test::CTX≻"));
+          CHECK (gate.data_.condition.rest == 0);
         }
       
       
diff --git a/tests/vault/gear/activity-detector.hpp b/tests/vault/gear/activity-detector.hpp
index 8acf46d54..85445f263 100644
--- a/tests/vault/gear/activity-detector.hpp
+++ b/tests/vault/gear/activity-detector.hpp
@@ -397,7 +397,7 @@ namespace test {
                 Activity& target = *reinterpret_cast<Activity*> (data_.callback.arg);
                 auto ctx = *static_cast<FakeExecutionCtx*> (executionCtx);
                 log_(util::toString(now) + " --notify-↯> " + util::toString (target));
-                return target.activate (now, ctx);/////////////////////////////////////////////////////OOO
+                return target.notify (now, ctx);
               }
           }
           
diff --git a/wiki/thinkPad.ichthyo.mm b/wiki/thinkPad.ichthyo.mm
index ea5c9ddf0..b89430de6 100644
--- a/wiki/thinkPad.ichthyo.mm
+++ b/wiki/thinkPad.ichthyo.mm
@@ -78525,9 +78525,9 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 </node>
 </node>
 </node>
-<node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1690068914674" ID="ID_229335349" MODIFIED="1690754699265" TEXT="switch-on-type-selector">
+<node COLOR="#338800" CREATED="1690068914674" ID="ID_229335349" MODIFIED="1692634842339" TEXT="switch-on-type-selector">
 <linktarget COLOR="#e3fddf" DESTINATION="ID_229335349" ENDARROW="Default" ENDINCLINATION="46;-190;" ID="Arrow_ID_382638651" SOURCE="ID_1532008023" STARTARROW="None" STARTINCLINATION="-301;39;"/>
-<icon BUILTIN="pencil"/>
+<icon BUILTIN="button_ok"/>
 <node CREATED="1688998699273" ID="ID_276240629" MODIFIED="1688998702452" TEXT="POST">
 <node CREATED="1690069222750" ID="ID_817512371" MODIFIED="1690495286268" TEXT="&#x3bb;-post">
 <linktarget COLOR="#a9b4c1" DESTINATION="ID_817512371" ENDARROW="Default" ENDINCLINATION="-55;19;" ID="Arrow_ID_1228234954" SOURCE="ID_1000629107" STARTARROW="None" STARTINCLINATION="-170;11;"/>
@@ -78638,9 +78638,9 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 </node>
 </node>
 </node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1690068951061" ID="ID_1729670913" MODIFIED="1692569150684" TEXT="Dispatch">
+<node COLOR="#338800" CREATED="1690068951061" ID="ID_1729670913" MODIFIED="1692634844170" TEXT="Dispatch">
 <linktarget COLOR="#46429b" DESTINATION="ID_1729670913" ENDARROW="Default" ENDINCLINATION="100;-277;" ID="Arrow_ID_1325928186" SOURCE="ID_1960608539" STARTARROW="None" STARTINCLINATION="-484;32;"/>
-<icon BUILTIN="flag-yellow"/>
+<icon BUILTIN="button_ok"/>
 <node CREATED="1692567620559" ID="ID_560161359" MODIFIED="1692567640105" TEXT="Notification indirekt &#xfc;ber den Scheduler">
 <icon BUILTIN="info"/>
 <node CREATED="1692567646787" ID="ID_1679080727" MODIFIED="1692567660965" TEXT="je nach Grooming-Token direkt(synchron) oder asynchron"/>
@@ -78680,15 +78680,16 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 <node CREATED="1690069612171" ID="ID_546472363" MODIFIED="1692569272220" TEXT="sonst: Activation"/>
 </node>
 </node>
-<node CREATED="1692627465184" ID="ID_1777234139" MODIFIED="1692627474498" TEXT="Ausf&#xfc;hrungs-Sequenz">
+<node COLOR="#338800" CREATED="1692627465184" ID="ID_1777234139" MODIFIED="1692634855358" TEXT="Ausf&#xfc;hrungs-Sequenz">
+<icon BUILTIN="button_ok"/>
 <node CREATED="1692627475398" ID="ID_635246138" MODIFIED="1692627523707" TEXT="normalerweise Weitergabe an die next-Activity "/>
 <node CREATED="1692627524719" ID="ID_1757918789" MODIFIED="1692627590963" TEXT="bei Spr&#xfc;ngen und Verzweigungen wird daf&#xfc;r POST verwendet">
 <linktarget COLOR="#9a7574" DESTINATION="ID_1757918789" ENDARROW="Default" ENDINCLINATION="197;-7;" ID="Arrow_ID_1929671741" SOURCE="ID_750903644" STARTARROW="None" STARTINCLINATION="116;9;"/>
 </node>
 </node>
-<node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1690069961163" HGAP="-57" ID="ID_1647246120" MODIFIED="1692491427946" TEXT="brauche Diagnose-Hilfsmittel" VSHIFT="4">
+<node COLOR="#338800" CREATED="1690069961163" HGAP="-57" ID="ID_1647246120" MODIFIED="1692634828819" TEXT="brauche Diagnose-Hilfsmittel" VSHIFT="4">
 <arrowlink COLOR="#794f4b" DESTINATION="ID_284088835" ENDARROW="Default" ENDINCLINATION="-685;-107;" ID="Arrow_ID_1213725911" STARTARROW="None" STARTINCLINATION="518;48;"/>
-<icon BUILTIN="pencil"/>
+<icon BUILTIN="button_ok"/>
 <node COLOR="#338800" CREATED="1690070237908" HGAP="43" ID="ID_875825086" MODIFIED="1692491405654" TEXT="Test-Setup mit &#x3bb;-Stubs" VSHIFT="-3">
 <arrowlink COLOR="#7ba8d3" DESTINATION="ID_596906210" ENDARROW="Default" ENDINCLINATION="76;284;" ID="Arrow_ID_1248869383" STARTARROW="None" STARTINCLINATION="990;-88;"/>
 <icon BUILTIN="button_ok"/>
@@ -79505,7 +79506,7 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 <linktarget COLOR="#433d62" DESTINATION="ID_902152915" ENDARROW="Default" ENDINCLINATION="656;-38;" ID="Arrow_ID_644734597" SOURCE="ID_596906210" STARTARROW="None" STARTINCLINATION="1154;77;"/>
 </node>
 </node>
-<node BACKGROUND_COLOR="#fdfdcf" COLOR="#ff0000" CREATED="1689202062345" ID="ID_373470992" MODIFIED="1692057818268" TEXT="implementiert als eigenst&#xe4;ndiges Test-Hilfsmittel">
+<node COLOR="#435e98" CREATED="1689202062345" ID="ID_373470992" MODIFIED="1692634808312" TEXT="implementiert als eigenst&#xe4;ndiges Test-Hilfsmittel">
 <richcontent TYPE="NOTE"><html>
   <head/>
   <body>
@@ -81725,8 +81726,8 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 <linktarget COLOR="#794f4b" DESTINATION="ID_284088835" ENDARROW="Default" ENDINCLINATION="-685;-107;" ID="Arrow_ID_1213725911" SOURCE="ID_1647246120" STARTARROW="None" STARTINCLINATION="518;48;"/>
 <linktarget COLOR="#5f8998" DESTINATION="ID_284088835" ENDARROW="Default" ENDINCLINATION="347;-1232;" ID="Arrow_ID_1573724609" SOURCE="ID_373470992" STARTARROW="None" STARTINCLINATION="634;35;"/>
 <icon BUILTIN="pencil"/>
-<node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1689204985122" ID="ID_1020676746" MODIFIED="1690832427037" TEXT="Rahmen schaffen">
-<icon BUILTIN="pencil"/>
+<node COLOR="#338800" CREATED="1689204985122" ID="ID_1020676746" MODIFIED="1692634792327" TEXT="Rahmen schaffen">
+<icon BUILTIN="button_ok"/>
 <node COLOR="#338800" CREATED="1689205014901" ID="ID_221497246" MODIFIED="1690832378644" TEXT="Instantiierung und Lebenszyklus">
 <icon BUILTIN="button_ok"/>
 <node COLOR="#338800" CREATED="1690817530037" ID="ID_497096743" MODIFIED="1690832373134" TEXT="kopierbares Objekt auf dem Stack">
@@ -81792,8 +81793,8 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 </node>
 </node>
 </node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1690891585410" ID="ID_1976653650" MODIFIED="1690891593537" TEXT="Action-Hook">
-<icon BUILTIN="flag-yellow"/>
+<node COLOR="#338800" CREATED="1690891585410" ID="ID_1976653650" MODIFIED="1692634770438" TEXT="Action-Hook">
+<icon BUILTIN="button_ok"/>
 <node COLOR="#435e98" CREATED="1690891602401" ID="ID_1359624247" MODIFIED="1690899606451" TEXT="als Primitive einf&#xfc;hren">
 <richcontent TYPE="NOTE"><html>
   <head/>
@@ -81818,12 +81819,12 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 </html></richcontent>
 <icon BUILTIN="messagebox_warning"/>
 </node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1692489058101" ID="ID_1423312805" MODIFIED="1692489067676" TEXT="auch f&#xfc;r Notifications geeignet ber&#xfc;cksichtigen">
-<icon BUILTIN="flag-yellow"/>
+<node COLOR="#338800" CREATED="1692489058101" ID="ID_1423312805" MODIFIED="1692634771598" TEXT="auch f&#xfc;r Notifications geeignet ber&#xfc;cksichtigen">
+<icon BUILTIN="button_ok"/>
 </node>
 </node>
-<node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1689205029658" ID="ID_1144318045" MODIFIED="1690918967997" TEXT="Verifikationen">
-<icon BUILTIN="pencil"/>
+<node COLOR="#338800" CREATED="1689205029658" ID="ID_1144318045" MODIFIED="1692634790926" TEXT="Verifikationen">
+<icon BUILTIN="button_ok"/>
 <node COLOR="#435e98" CREATED="1690899802680" ID="ID_383665548" MODIFIED="1692053471680" TEXT="Problem: zweifelsfreie Verifikation im Log">
 <icon BUILTIN="messagebox_warning"/>
 <node BACKGROUND_COLOR="#e0ceaa" COLOR="#690f14" CREATED="1690899845778" ID="ID_527585169" MODIFIED="1690899886750" TEXT="mu&#xdf; fehl-Matches vermeiden">
@@ -81870,7 +81871,7 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 <node CREATED="1691876688987" ID="ID_1053525826" MODIFIED="1691876722777" TEXT="f&#xfc;r einen dedizierten Verifikator m&#xfc;&#xdf;te eine Struktur analog zum EventLog aufgebaut werden"/>
 <node CREATED="1691876724045" ID="ID_599766465" MODIFIED="1691876757873" TEXT="insofern ist es eine &#x201e;Abk&#xfc;rzung&#x201c;, das EventLog hierf&#xfc;r einzusetzen"/>
 </node>
-<node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1691876355275" ID="ID_165347645" MODIFIED="1692121937862" TEXT="brauche komplexere verkn&#xfc;pfte Matches">
+<node COLOR="#435e98" CREATED="1691876355275" ID="ID_165347645" MODIFIED="1692634764970" TEXT="brauche komplexere verkn&#xfc;pfte Matches">
 <richcontent TYPE="NOTE"><html>
   <head/>
   <body>
@@ -82180,13 +82181,16 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 </node>
 <node CREATED="1692484977802" ID="ID_1632816684" MODIFIED="1692485020188" TEXT="zeichnet Zeitpunkt und ggfs Subject auf"/>
 </node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1692485180411" ID="ID_1178843988" MODIFIED="1692485203735" TEXT="auch &#xdc;berwachung von Notifications erm&#xf6;glichen">
-<icon BUILTIN="flag-yellow"/>
+<node COLOR="#338800" CREATED="1692485180411" ID="ID_1178843988" MODIFIED="1692634691707" TEXT="&#xdc;berwachung von Notifications erm&#xf6;glichen">
+<icon BUILTIN="button_ok"/>
+<node CREATED="1692634693956" ID="ID_952722348" MODIFIED="1692634705286" TEXT="als Erg&#xe4;nzung in den HOOK-Callback eingebaut"/>
+<node CREATED="1692634705802" ID="ID_1440095266" MODIFIED="1692634720901" TEXT="reagiert speziell wenn die notify()-Funktion aufgerufen wird"/>
+<node CREATED="1692634721608" ID="ID_1461472121" MODIFIED="1692634732442" TEXT="auch hier wird die Notification dann an das Target weitergereicht"/>
 </node>
 </node>
 </node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1689205081622" ID="ID_1440811513" MODIFIED="1689205086027" TEXT="Me&#xdf;punkte">
-<icon BUILTIN="flag-yellow"/>
+<node COLOR="#338800" CREATED="1689205081622" ID="ID_1440811513" MODIFIED="1692634756484" TEXT="Me&#xdf;punkte">
+<icon BUILTIN="button_ok"/>
 <node COLOR="#338800" CREATED="1689205105640" ID="ID_1975472338" MODIFIED="1692120794297" TEXT="Dummy-Funktor">
 <icon BUILTIN="button_ok"/>
 <node COLOR="#435e98" CREATED="1692114609799" ID="ID_742671204" MODIFIED="1692114749800" TEXT="was wird erzeugt?">
@@ -82344,8 +82348,8 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 <icon BUILTIN="button_ok"/>
 </node>
 </node>
-<node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1689205423173" ID="ID_935068564" MODIFIED="1692487675023" TEXT="watchGate">
-<icon BUILTIN="pencil"/>
+<node COLOR="#338800" CREATED="1689205423173" ID="ID_935068564" MODIFIED="1692634749567" TEXT="watchGate">
+<icon BUILTIN="button_ok"/>
 <node COLOR="#435e98" CREATED="1692485210898" ID="ID_1284233307" MODIFIED="1692491324320" TEXT="komplexe Aufgabe">
 <icon BUILTIN="messagebox_warning"/>
 <node CREATED="1692485226036" ID="ID_1556332540" MODIFIED="1692485237497" TEXT="das Gate bietet eigentlich keine Erweiterungspunkte"/>
@@ -82362,8 +82366,8 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 <node CREATED="1692485311859" ID="ID_1216045769" MODIFIED="1692485364424" TEXT="diese kann Aktivierung aufzeichnen">
 <icon BUILTIN="idea"/>
 </node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1692485320231" ID="ID_1801884487" MODIFIED="1692485360568" TEXT="zudem M&#xf6;glichkeit schaffen, auch Notification aufzuzeichnen">
-<icon BUILTIN="flag-yellow"/>
+<node COLOR="#338800" CREATED="1692485320231" ID="ID_1801884487" MODIFIED="1692634747940" TEXT="zudem M&#xf6;glichkeit schaffen, auch Notification aufzuzeichnen">
+<icon BUILTIN="button_ok"/>
 </node>
 </node>
 <node COLOR="#338800" CREATED="1692485417998" ID="ID_856616436" MODIFIED="1692487971912" TEXT="zudem Probe auf den next-Ptr legen">