adventure: read a finished run back and tell Pete what it was about

Two halves of the same gap. A dispatch announcing a clear, a retreat or a death
said how an expedition ended and gave a reader no way to reach what happened in
it — so those three facts now carry the run they concluded, and Pete's permalink
can open the log behind the headline.

Finding that run is done by asking what is actually true at the moment a
dispatch is filed rather than by threading a run id through five call sites that
have already let go of it. Both guards on that lookup are load-bearing: a run
with no beats behind it would mint a link to a 404, and without the recency
window a campaign death at the Empty Throne would attach itself to whatever
dungeon that player last walked.

The other half is the summary. Every line of the liveblog is assembled by Pete
out of a beat's own nouns, which is right for a log — it has to be exactly what
happened, in order. But a report is read afterwards and the question it answers
is not "what happened", it is "what was that run", and that is a judgement. So
this is the one piece of prose on the channel, and it earns the model far better
than a dispatch headline does.

It runs on the roster ticker, not at the moment the run ends. A run ending is
already a chokepoint with a dispatch being authored against it, and a second
generation there would stall the command that killed the boss. One per tick, and
a run that can't be summarised is closed out with an empty beat rather than
retried forever — the row is what stops the sweep picking it up again, and a
report with no summary is still the log and the numbers.

The prompt states the one permitted name twice and forbids arithmetic: a model
asked to write warmly about a party will invent a second member of it, and a
total it works out itself will contradict the exact totals printed beside it.
Both were seen against the real box before this was tightened.

Claude-Session: https://claude.ai/code/session_012bxpQQJDjC1mTtLN3VVtBQ

internal/plugin/pete_roster.go

@@ -54,6 +54,11 @@ func (p *AdventurePlugin) peteRosterTicker() {
 		p.pushDetails()
 		p.pushSiege()
 		p.pushRunBeats()
+		// After the beats, not before: the summary is the last beat of a run's
+		// story and has no business overtaking the log it is about. It is also the
+		// only step here that can talk to the model, which is why it lives on a
+		// ticker at all rather than at the moment a run ends.
+		p.sweepRunSummaries()
 	}
 }