Fix issues found testing the tools live

- The model has no clock and invented a 2025 start date for the
  calendar; the system prompt now carries the current date and time.
- It also derived a wrong weekday from a date; agenda.py prints the
  weekday itself.
- An announcement ran straight into the answer; a 0.6 s pause follows it.
- The calendar days hint asks for 30 or more when looking for the next
  event.

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

3 files changed, 16 insertions, 7 deletions

diff --git a/assistant.py b/assistant.py
index 16e6133..84f0dd8 100644
--- a/assistant.py
+++ b/assistant.py
@@ -275,6 +275,10 @@ def speaker(q):
                 play.wait()
                 play = None
             continue
+        if isinstance(item, float):       # seconds of silence
+            if play:
+                play.stdin.write(bytes(int(sr * item) * 2))
+            continue
         text, lang = item
         audio, sr = k.create(text, voice=voices[lang], lang=KLANG[lang])
         if play is None:
@@ -333,7 +337,9 @@ def reply(history, q):
     log(f"you ({lang}, {time.perf_counter() - t:.2f}s): {text}")
     history.append({"role": "user", "content": text})
     # ponytail: last 20 messages, summarise if long sessions need memory
-    msgs = [{"role": "system", "content": CFG["system"]}] + history[-20:]
+    # The model has no clock: without the date it makes one up for tools.
+    now = time.strftime("It is %A %d %B %Y, %H:%M.")
+    msgs = [{"role": "system", "content": f"{CFG['system']} {now}"}] + history[-20:]
     t, said, voice, announced = time.perf_counter(), [], lang, False
 
     def say(s):
@@ -364,6 +370,8 @@ def reply(history, q):
         if phrase:
             # The question's language: the reply has no text yet to follow.
             q.put((phrase, lang))
+            # A beat after it: straight into the answer sounds rushed.
+            q.put(0.6)
             announced = True
         for c in calls.values():
             result = run_tool(TOOLS, c["name"], c["arguments"])
diff --git a/examples/tools/agenda.py b/examples/tools/agenda.py
index 44bc34b..6c5bfca 100755
--- a/examples/tools/agenda.py
+++ b/examples/tools/agenda.py
@@ -77,6 +77,7 @@ def when(line):
 def agenda(d, start, days):
     # ponytail: naive local times, so a recurring event in a zone other than
     # ours drifts by an hour across DST; multi-day events show on day one only.
+    # The weekday is printed because the model gets it wrong from a date.
     lo = dt.datetime.fromisoformat(start)
     hi = lo + dt.timedelta(days=days)
     evs = []
@@ -106,7 +107,7 @@ def agenda(d, start, days):
             occ = [first] if lo <= first < hi else []
         summary = e.get("SUMMARY", "SUMMARY:(no title)").split(":", 1)[1]
         summary = summary.replace("\\,", ",").replace("\\;", ";").replace("\\n", " ")
-        out += [(t, f"{t:%Y-%m-%d} {'all day' if allday else f'{t:%H:%M}'} {summary}")
+        out += [(t, f"{t:%A %Y-%m-%d} {'all day' if allday else f'{t:%H:%M}'} {summary}")
                 for t in occ]
     return [line for _, line in sorted(out)]
 
@@ -140,11 +141,11 @@ def test():
             with open(os.path.join(d, "cal", name), "w", newline="") as f:
                 f.write(text)
         assert agenda(d, "2026-09-01", 30) == [
-            "2026-09-01 18:00 Gym", "2026-09-16 19:00 Gym moved",
-            "2026-09-22 18:00 Gym", "2026-09-29 18:00 Gym"], agenda(d, "2026-09-01", 30)
-        assert agenda(d, "2026-03-10", 5) == ["2026-03-12 all day Birthday"]
+            "Tuesday 2026-09-01 18:00 Gym", "Wednesday 2026-09-16 19:00 Gym moved",
+            "Tuesday 2026-09-22 18:00 Gym", "Tuesday 2026-09-29 18:00 Gym"], agenda(d, "2026-09-01", 30)
+        assert agenda(d, "2026-03-10", 5) == ["Thursday 2026-03-12 all day Birthday"]
         assert agenda(d, "2026-10-01", 1) == [
-            "2026-10-01 10:00 Dentist, checkup", "2026-10-01 18:00 Call"]    # 16Z = 18 local
+            "Thursday 2026-10-01 10:00 Dentist, checkup", "Thursday 2026-10-01 18:00 Call"]    # 16Z = 18 local
         assert agenda(d, "2026-10-02", 1) == []
     print("ok")
 
diff --git a/examples/tools/calendar.toml b/examples/tools/calendar.toml
index 75e4898..50b578c 100644
--- a/examples/tools/calendar.toml
+++ b/examples/tools/calendar.toml
@@ -8,4 +8,4 @@ description = "First day, YYYY-MM-DD. Empty for today."
 
 [params.days]
 type = "integer"
-description = "How many days, 1 for a single day. Empty for 1."
+description = "How many days, 1 for a single day, 30 or more for the next event. Empty for 1."