chore: remove code nothing uses

- is_yahoo_safe, has_checkpoint, get_wall_times, the graph's curr_state and the project_dir config key
- the CLI's final_report and current_agent state, its duplicate get_analysis_date and the save_report_to_disk wrapper
- the dotenv import guard (a hard dependency) and a warning filter for langgraph-checkpoint 4.0.3

tests/test_analyst_execution.py

@@ -49,7 +49,7 @@ class AnalystWallTimeTrackerTests(unittest.TestCase):
         tracker.mark_started("market", started_at=10.0)
         tracker.mark_completed("market", completed_at=13.5)
 
-        self.assertEqual(tracker.get_wall_times(), {"market": 3.5})
+        self.assertEqual(tracker.format_summary(), "Analyst wall time: Market 3.50s")
 
     def test_formats_summary_in_plan_order(self):
         plan = build_analyst_execution_plan(["news", "market"])
@@ -70,21 +70,18 @@ class AnalystWallTimeTrackerTests(unittest.TestCase):
         tracker = AnalystWallTimeTracker(plan)
 
         sync_analyst_tracker_from_chunk(tracker, {}, now=10.0)
-        self.assertEqual(tracker.get_wall_times(), {})
+        self.assertEqual(tracker.format_summary(), "Analyst wall time: pending")
 
         sync_analyst_tracker_from_chunk(
             tracker,
             {"market_report": "done"},
             now=13.0,
         )
-        self.assertEqual(tracker.get_wall_times(), {"market": 3.0})
+        self.assertEqual(tracker.format_summary(), "Analyst wall time: Market 3.00s")
 
         sync_analyst_tracker_from_chunk(
             tracker,
             {"market_report": "done", "news_report": "done"},
             now=18.0,
         )
-        self.assertEqual(
-            tracker.get_wall_times(),
-            {"market": 3.0, "news": 5.0},
-        )
+        self.assertEqual(tracker.format_summary(), "Analyst wall time: Market 3.00s | News 5.00s")

tests/test_checkpoint_resume.py

@@ -10,7 +10,6 @@ from tradingagents.graph.checkpointer import (
     checkpoint_step,
     clear_checkpoint,
     get_checkpointer,
-    has_checkpoint,
     thread_id,
 )
 
@@ -63,7 +62,7 @@ class TestCheckpointResume(unittest.TestCase):
                 graph.invoke({"count": 0}, config=cfg)
 
         # Checkpoint should exist at step 1 (analyst completed)
-        self.assertTrue(has_checkpoint(self.tmpdir, self.ticker, self.date))
+        self.assertIsNotNone(checkpoint_step(self.tmpdir, self.ticker, self.date))
         step = checkpoint_step(self.tmpdir, self.ticker, self.date)
         self.assertEqual(step, 1)
 
@@ -90,11 +89,11 @@ class TestCheckpointResume(unittest.TestCase):
             with self.assertRaises(RuntimeError):
                 graph.invoke({"count": 0}, config=cfg)
 
-        self.assertTrue(has_checkpoint(self.tmpdir, self.ticker, self.date))
+        self.assertIsNotNone(checkpoint_step(self.tmpdir, self.ticker, self.date))
 
         # Clear it
         clear_checkpoint(self.tmpdir, self.ticker, self.date)
-        self.assertFalse(has_checkpoint(self.tmpdir, self.ticker, self.date))
+        self.assertIsNone(checkpoint_step(self.tmpdir, self.ticker, self.date))
 
         # Fresh run succeeds from scratch
         _should_crash = False
@@ -119,10 +118,10 @@ class TestCheckpointResume(unittest.TestCase):
             with self.assertRaises(RuntimeError):
                 graph.invoke({"count": 0}, config={"configurable": {"thread_id": tid1}})
 
-        self.assertTrue(has_checkpoint(self.tmpdir, self.ticker, self.date))
+        self.assertIsNotNone(checkpoint_step(self.tmpdir, self.ticker, self.date))
 
         # date2 should have no checkpoint
-        self.assertFalse(has_checkpoint(self.tmpdir, self.ticker, date2))
+        self.assertIsNone(checkpoint_step(self.tmpdir, self.ticker, date2))
 
         # Run with date2 — should start fresh and succeed
         _should_crash = False
@@ -137,7 +136,7 @@ class TestCheckpointResume(unittest.TestCase):
         self.assertEqual(result["count"], 11)
 
         # Original date checkpoint still exists (untouched)
-        self.assertTrue(has_checkpoint(self.tmpdir, self.ticker, self.date))
+        self.assertIsNotNone(checkpoint_step(self.tmpdir, self.ticker, self.date))
 
 
 class TestCheckpointSignature(unittest.TestCase):
@@ -178,9 +177,9 @@ class TestCheckpointSignature(unittest.TestCase):
             with self.assertRaises(RuntimeError):
                 graph.invoke({"count": 0}, config={"configurable": {"thread_id": tid1}})
 
-        self.assertTrue(has_checkpoint(self.tmpdir, self.ticker, self.date, sig1))
+        self.assertIsNotNone(checkpoint_step(self.tmpdir, self.ticker, self.date, sig1))
         # A different graph shape has no checkpoint to resume from.
-        self.assertFalse(has_checkpoint(self.tmpdir, self.ticker, self.date, sig2))
+        self.assertIsNone(checkpoint_step(self.tmpdir, self.ticker, self.date, sig2))
 
         _should_crash = False
         tid2 = thread_id(self.ticker, self.date, sig2)
@@ -190,7 +189,7 @@ class TestCheckpointSignature(unittest.TestCase):
             result = graph.invoke({"count": 0}, config={"configurable": {"thread_id": tid2}})
         self.assertEqual(result["count"], 11)
         # sig1's checkpoint remains untouched.
-        self.assertTrue(has_checkpoint(self.tmpdir, self.ticker, self.date, sig1))
+        self.assertIsNotNone(checkpoint_step(self.tmpdir, self.ticker, self.date, sig1))
 
     def test_run_signature_captures_graph_shape(self):
         from tradingagents.graph.trading_graph import TradingAgentsGraph

tests/test_symbol_utils.py

@@ -7,7 +7,6 @@ import pytest
 from tradingagents.dataflows.symbol_utils import (
     NoMarketDataError,
     crypto_base,
-    is_yahoo_safe,
     normalize_symbol,
 )
 
@@ -88,17 +87,6 @@ class TestNoMarketDataError(unittest.TestCase):
         self.assertEqual(err.canonical, "FOOBAR")
 
 
-@pytest.mark.unit
-class TestIsYahooSafe(unittest.TestCase):
-    def test_accepts_structural_chars(self):
-        for sym in ("AAPL", "GC=F", "^GSPC", "BRK.B", "BTC-USD"):
-            self.assertTrue(is_yahoo_safe(sym))
-
-    def test_rejects_slash_and_space(self):
-        for sym in ("a/b", "AA PL", ""):
-            self.assertFalse(is_yahoo_safe(sym))
-
-
 @pytest.mark.unit
 class TestCryptoBase(unittest.TestCase):
     def test_resolves_known_crypto_forms(self):