Add AI topics, a sources discovery command, and intelligence-radar's pointer sources.

Topics ai.benchmarks, ai.pricing and ai.models; 'sources --repo' lists
visible sources matching a repo's topics. Registers the five ir-* URL
sources contributed by intelligence-radar (IR-WP-0010-T04).

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

Assistant: claude-code
Assistant-Model: opus
Assistant-Process: 7780@bnt-lap001
Assistant-Session: 622cd705-cb31-4322-ba08-dd42e44fa583

inbound_library/__main__.py

@@ -81,6 +81,9 @@ def main(argv=None):
     get = sub.add_parser('get', help='write the original bytes of an item to stdout')
     get.add_argument('item')
     sub.add_parser('health', help='last scan, per-source counts, silence, quarantine')
+    sources = sub.add_parser('sources', help='list registered sources a repo may see, by topic')
+    sources.add_argument('--repo', required=True)
+    sources.add_argument('--topic', help='limit to one topic (default: the repo subscription topics)')
     args = parser.parse_args(argv)
     root = Path(args.root)
     config = _config(root, args.config)
@@ -121,6 +124,9 @@ def main(argv=None):
     if args.command == 'get':
         sys.stdout.buffer.write(store.get_item(root, args.item))
         return 0
+    if args.command == 'sources':
+        _print(reg.sources_for(reg.load(root), args.repo, args.topic))
+        return 0
     if args.command == 'health':
         report = notify.health(root)
         _print(report)

inbound_library/registry.py

@@ -120,3 +120,20 @@ def subscribers_for(registry, source_id):
                 set(source.get('topics', [])) & set(subscription.get('topics', [])):
             matched.append(repo)
     return matched
+
+
+def sources_for(registry, repo, topic=None):
+    """Sources visible to a repo whose topics match its subscription (or one topic).
+
+    URL sources are pointers: the library lists them and does not fetch them.
+    """
+    if topic:
+        wanted = {topic}
+    else:
+        subscription = registry['subscriptions'].get(repo, {})
+        wanted = set(subscription.get('topics', []))
+    listed = []
+    for ident, source in sorted(visible_sources(registry, repo).items()):
+        if wanted & set(source.get('topics', [])):
+            listed.append({key: value for key, value in source.items() if key != '_file'})
+    return listed