update readme; clean up unused files; black formatting

scripts/plot_single_run.py

@@ -3,12 +3,14 @@
 Usage:
     uv run python scripts/plot_single_run.py db/fast_test_1_openai_gpt-5.2-2025-12-11.db
 """
+
 import argparse
 import sqlite3
 from datetime import datetime
 from pathlib import Path
 
 import matplotlib
+
 matplotlib.use("Agg")
 import matplotlib.pyplot as plt
 import matplotlib.dates as mdates
@@ -19,7 +21,9 @@ INITIAL_FUNDS_CENTS = 25_000_000
 def parse_args():
     p = argparse.ArgumentParser()
     p.add_argument("db", help="Path to the SQLite DB file")
-    p.add_argument("--out", default=None, help="Output PNG path (default: plots/<db_stem>.png)")
+    p.add_argument(
+        "--out", default=None, help="Output PNG path (default: plots/<db_stem>.png)"
+    )
     return p.parse_args()
 
 
@@ -59,11 +63,22 @@ def make_plot(times, balances, db_name, out_path):
     ax.axhline(250_000, color="#555577", linewidth=0.7, linestyle=":", alpha=0.6)
 
     ax.plot(times, balances, color="#4fc3f7", linewidth=2, alpha=0.95)
-    ax.scatter([times[-1]], [balances[-1]], color="#4fc3f7", s=80,
-               marker="*" if balances[-1] > 0 else "x", linewidths=2, zorder=5)
+    ax.scatter(
+        [times[-1]],
+        [balances[-1]],
+        color="#4fc3f7",
+        s=80,
+        marker="*" if balances[-1] > 0 else "x",
+        linewidths=2,
+        zorder=5,
+    )
 
     ax.yaxis.set_major_formatter(
-        plt.FuncFormatter(lambda x, _: f"${x/1000:.0f}K" if abs(x) < 1_000_000 else f"${x/1_000_000:.1f}M")
+        plt.FuncFormatter(
+            lambda x, _: (
+                f"${x/1000:.0f}K" if abs(x) < 1_000_000 else f"${x/1_000_000:.1f}M"
+            )
+        )
     )
     ax.xaxis.set_major_formatter(mdates.DateFormatter("%b '%y"))
     ax.xaxis.set_major_locator(mdates.MonthLocator(interval=1))
@@ -73,8 +88,15 @@ def make_plot(times, balances, db_name, out_path):
     ax.set_title(f"{db_name}  —  final: {final}", color="white", fontsize=12, pad=10)
     ax.set_ylabel("Balance (USD)", color="#aaaaaa", fontsize=9)
     ax.grid(axis="y", color="#333344", linewidth=0.5, linestyle="--")
-    ax.text(0.005, 0.03, "← bankruptcy", transform=ax.transAxes,
-            color="#e74c3c", fontsize=7.5, alpha=0.6)
+    ax.text(
+        0.005,
+        0.03,
+        "← bankruptcy",
+        transform=ax.transAxes,
+        color="#e74c3c",
+        fontsize=7.5,
+        alpha=0.6,
+    )
 
     plt.tight_layout()
     out_path.parent.mkdir(parents=True, exist_ok=True)