Active user attribute set, latest activities, guarded changes to used values, artefact links, durations and averages; irreversible showcase step

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

Assistant: claude-code
Assistant-Model: sonnet
Assistant-Process: 295952@bnt-lap001
Assistant-Session: e93f64ad-516c-46eb-9666-aad8d300c477

runbooks/showcase-lighthouse-v2/REVIEWS.yaml

@@ -0,0 +1,5 @@
+reviews:
+- by: Bernd
+  at: '2026-09-29T13:19:03+00:00'
+  digest: 18e2c938b35bf59c
+  note: This is my first try.

runbooks/showcase-lighthouse-v2/pack.yaml

@@ -116,7 +116,7 @@ stages:
         requires: [warn]
         uses: [keeper_name, weather, lamp_fuel, motto, logdir]
         produces: [logbook-file]
-        command: mkdir -p {{logdir}} && echo "Night watch by {{keeper_name}} - {{weather}}, {{lamp_fuel}} lamp. {{motto}}." >> {{logdir}}/logbook.txt
+        command: mkdir -p {{logdir}} && echo "Night watch by {{keeper_name}} at $(date -u +%H:%M:%S) UTC - {{weather}}, {{lamp_fuel}} lamp. {{motto}}." >> {{logdir}}/logbook.txt
         reversible: true
         rollback: rm -rf {{logdir}}
         verify: {done_when: The logbook exists, command: 'test -s {{logdir}}/logbook.txt', expect: exit-0}
@@ -130,6 +130,7 @@ stages:
         idempotent: conditional
         idempotent_note: Safe to repeat only while the log file exists; a second run fails on the read.
         title: Close the log for good
+        description: The entry carries the exact time it was written, to the second. Once the scratch folder is removed it cannot be written again the same way, so this step cannot be undone.
         auto_confirm: manual-only     # never confirmed by the engine on its own
         actor: harbourmaster
         owner: the-lighthouse