feat: prompt assembly renders active events + open threads (T60)

tests/test_prompt.py

@@ -12,12 +12,14 @@ import pytest
 
 from chat.db.connection import open_db
 from chat.db.migrate import apply_migrations
-from chat.eventlog.log import append_event
+from chat.eventlog.log import append_and_apply, append_event
 from chat.eventlog.projector import project
 import chat.state.entities  # noqa: F401  (registers handlers)
 import chat.state.edges  # noqa: F401
 import chat.state.memory  # noqa: F401
 import chat.state.world  # noqa: F401
+import chat.state.events  # noqa: F401
+import chat.state.threads  # noqa: F401
 from chat.llm.client import Message
 from chat.services.prompt import assemble_narrative_prompt
 
@@ -761,3 +763,92 @@ def test_assemble_with_tight_budget_drops_guest_activity_first(tmp_path):
     import tiktoken
     enc = tiktoken.get_encoding("cl100k_base")
     assert len(enc.encode(body)) <= 340
+
+
+# ---------------------------------------------------------------------------
+# Task 60: Active events + open threads in prompt assembly
+# ---------------------------------------------------------------------------
+
+
+def test_assemble_with_no_events_or_threads_omits_blocks(tmp_path):
+    """Regression: with the basic 2-entity scenario (no events seeded, no
+    threads seeded), the assembled prompt must NOT contain the
+    ``Active events:`` or ``Open threads:`` headers — both blocks are
+    omit-when-empty."""
+    db = tmp_path / "t.db"
+    apply_migrations(db)
+    with open_db(db) as conn:
+        _seed_basic(conn)
+        msgs = assemble_narrative_prompt(
+            conn,
+            chat_id="chat_bot_a",
+            speaker_bot_id="bot_a",
+            recent_dialogue=[],
+            retrieved_memory_summaries=[],
+        )
+    body = msgs[0].content
+    assert "Active events:" not in body
+    assert "Open threads:" not in body
+
+
+def test_assemble_with_active_events_renders_block(tmp_path):
+    """Seed a planned event then transition it to active; the assembled
+    prompt should render the ``Active events:`` block listing the event
+    by kind."""
+    db = tmp_path / "t.db"
+    apply_migrations(db)
+    with open_db(db) as conn:
+        _seed_basic(conn)
+        # event_planned then event_started → status="active". Use
+        # append_and_apply because _seed_basic already projected; calling
+        # project() again would replay every prior event (and trip
+        # UNIQUE constraints on chat_created etc.).
+        append_and_apply(conn, kind="event_planned", payload={
+            "event_id": "evt_park",
+            "chat_id": "chat_bot_a",
+            "kind": "date_at_park",
+            "props": {"location": "Riverside Park", "vibe": "casual"},
+            "planned_for": "2026-04-30T18:00:00+00:00",
+        })
+        append_and_apply(conn, kind="event_started", payload={
+            "event_id": "evt_park",
+            "started_at": "2026-04-30T18:05:00+00:00",
+        })
+        msgs = assemble_narrative_prompt(
+            conn,
+            chat_id="chat_bot_a",
+            speaker_bot_id="bot_a",
+            recent_dialogue=[],
+            retrieved_memory_summaries=[],
+        )
+    body = msgs[0].content
+    assert "Active events:" in body
+    assert "date_at_park" in body
+
+
+def test_assemble_with_open_thread_renders_block(tmp_path):
+    """Seed a single open thread; the assembled prompt should render the
+    ``Open threads:`` block listing the thread by title."""
+    db = tmp_path / "t.db"
+    apply_migrations(db)
+    with open_db(db) as conn:
+        _seed_basic(conn)
+        # _seed_basic already projected; use append_and_apply for the
+        # post-seed event so we don't re-trigger UNIQUE constraint
+        # collisions on the prior chat_created/etc. events.
+        append_and_apply(conn, kind="thread_opened", payload={
+            "thread_id": "thr_job",
+            "chat_id": "chat_bot_a",
+            "title": "Maya's job hunt",
+            "summary": "Maya is looking for a new job",
+        })
+        msgs = assemble_narrative_prompt(
+            conn,
+            chat_id="chat_bot_a",
+            speaker_bot_id="bot_a",
+            recent_dialogue=[],
+            retrieved_memory_summaries=[],
+        )
+    body = msgs[0].content
+    assert "Open threads:" in body
+    assert "Maya's job hunt" in body