Q147: the conversation header lists its real members, how each agent replies, and who can read

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

src/main/services/chat-anchor.ts

@@ -0,0 +1,18 @@
+import type { DatabaseSync } from "node:sqlite";
+
+/** The agent that answers a channel message naming no one: its most senior active member with an enabled provider. */
+export function channelAnchorAgentId(db: DatabaseSync, orgId: string, spaceId: string): string | null {
+  const anchor = db.prepare(`
+    select a.id as agent_id
+    from chat_memberships cm
+    join agents a on a.id = cm.principal_id and a.org_id = ?
+    join providers p on p.id = a.model_provider_id and p.org_id = a.org_id
+    where cm.space_id = ? and cm.principal_type = 'agent'
+      and a.lifecycle = 'active'
+      and p.enabled = 1
+    order by case a.role_level when 'c_suite' then 0 when 'director' then 1 when 'lead' then 2 else 3 end,
+             a.created_at asc
+    limit 1
+  `).get(orgId, spaceId) as { agent_id: string } | undefined;
+  return anchor?.agent_id ?? null;
+}