Town: Iceshrimp.NET joins, and its mentions go nowhere new

Iceshrimp.NET 2026.1.2-beta runs in the pasture with AuthorizedFetch on;
its driver registers through the native API and takes Mastodon tokens from
its OAuth form. The pair passes 225 cells. A new Iceshrimp note reaches its
author's followers only, never an account it mentions or answers, until it
is edited (G-0004, peer): delivery cells now say when a server holds a post
only because it was addressed.

The checker credits a seeder's fetch to the object fetched, not to the reply
that needed it; the seeder skips the wait for an accept whose follow was
already accepted; the PrivaPub driver signs its roots in again when a run
reuses saved sessions.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw

tools/pasture/town/check.py

@@ -48,11 +48,20 @@ class World:
 			self.facts = [json.loads(line) for line in f if line.strip()]
 		self.ok_steps = {f["n"] for f in self.facts if f.get("type") not in ("error", "unsupported") and "n" in f}
 		self.failed = {f["n"]: f for f in self.facts if f.get("type") in ("error", "unsupported")}
+		# a fact's fetched_on names the objects its server had to fetch first (a reply's parent, a quote), and an
+		# interaction that arrived_by fetch made its actor's server fetch its object: both are kept per fetched object
+		fetched = defaultdict(set)
+		for f in self.facts:
+			for platform, refs in (f.get("fetched_on") or {}).items():
+				for ref in refs:
+					fetched[ref].add(platform)
+			if f.get("type") == "interaction" and f.get("arrived_by") == "fetch":
+				fetched[f["ref"]].add(self.platform(f["actor"]))
 		self.objects = {}
 		for f in self.facts:
 			if f.get("type") == "object":
 				o = dict(self.planner.objects[f["ref"]])
-				o.update(uri=f["uri"], origin=f["origin"], fetched_on=f.get("fetched_on", {}))
+				o.update(uri=f["uri"], origin=f["origin"], fetched_on=sorted(fetched[f["ref"]]))
 				self.objects[f["ref"]] = o
 		self.deleted = {f["ref"] for f in self.facts if f.get("type") == "mutation" and f["verb"] == "delete"}
 		self.edited = {f["ref"] for f in self.facts if f.get("type") == "mutation" and f["verb"] == "edit"}
@@ -197,8 +206,10 @@ class Sweep:
 					continue
 				if p in want and (receives is None or kind in receives):
 					fetched = p in o.get("fetched_on", {})
-					self.add(f"deliver.{kind}", o["origin"], p, held, ref, "held", "held" if held else "missing", through,
-							 how="fetched by the seeder" if fetched else None)
+					# whether a follower of the author lives on p, or only the accounts it mentions or answers
+					followed = any(self.w.platform(k) == p for k in self.w.follows.get(o["author"], ()))
+					how = "fetched by the seeder" if fetched else None if followed or kind in ("circle", "community") else "addressed only"
+					self.add(f"deliver.{kind}", o["origin"], p, held, ref, "held", "held" if held else "missing", through, how=how)
 				elif kind in ("followers", "direct", "circle", "located") and p not in want:
 					self.add(f"confine.{kind}", o["origin"], p, not held, ref, "absent", "held" if held else "absent", through)