STATE-WP-0093: per-recipient broadcast receipts and standing notices (T01-T06).

Founder approved T01 on 2026-09-22 (D2, D3, D6 as recommended).
- T02: message_receipts table; kind/expires_at/supersedes_id on
  agent_messages; migration d7e8f9a0b1c2 archives existing broadcasts,
  leaves direct messages untouched, reversible.
- T03: reader-aware mark-read (unattributed broadcast mark-read is a
  metered, deprecated no-op), delivery receipts on the scoped unread inbox,
  POST /messages/{id}/ack, news/standing kinds, expiry, supersede, broadcast
  archive no longer stamps read_at, reply writes the replier's receipt.
- T04 (state-hub part): Codex MCP reader param and acknowledge_notice;
  hub-core part handed off (message 69fc387c).
- T05: GET /messages/notices, standing_notices in /state/summary,
  dashboard standing-notices panel.
- T06: 17 new tests; full suite green.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Assistant: claude-code
Assistant-Model: opus
Assistant-Process: 63291@bnt-lap001
Assistant-Session: 8bd77868-ca68-4f49-bb1e-d539ecc0d703

tests/test_codex_mcp_server.py

@@ -9,6 +9,7 @@ def test_codex_server_has_only_repository_coordination_tools() -> None:
         "get_domain_summary",
         "get_messages",
         "mark_message_read",
+        "acknowledge_notice",
         "add_progress_event",
         "record_decision",
         "update_task_status",
@@ -17,3 +18,18 @@ def test_codex_server_has_only_repository_coordination_tools() -> None:
 
 def test_codex_server_uses_distinct_server_identity() -> None:
     assert codex_server.mcp.name == "dev-hub-codex"
+
+
+def test_mark_message_read_passes_reader(monkeypatch) -> None:
+    calls = []
+    monkeypatch.setattr(
+        codex_server, "_request", lambda method, path, body=None: calls.append((method, path, body)) or {}
+    )
+    codex_server.mark_message_read("abc", reader="state-hub")
+    codex_server.mark_message_read("abc")
+    codex_server.acknowledge_notice("abc", "state-hub")
+    assert calls == [
+        ("PATCH", "/messages/abc/read?reader=state-hub", {}),
+        ("PATCH", "/messages/abc/read", {}),
+        ("POST", "/messages/abc/ack", {"agent": "state-hub"}),
+    ]