feat: add portfolio

config/config.yaml

@@ -58,3 +58,15 @@ outputs:
 # prompt reads back to dedup each briefing against the last one.
 archive:
   dir: ~/.local/state/stonks/runs
+
+# Always on: a simulated paper-trading account Claude's own buy/sell
+# recommendations execute against (never other advisors' — see
+# analyzer.advisors). State (cash, open positions, running profit) persists
+# in portfolio.json under dir, and Claude's freeform decision notes persist
+# alongside it in memory.md. All position sizing/leverage math and profit
+# calculation is done in Go (internal/portfolio), not by Claude — Claude
+# only requests an amount_usd/leverage per call.
+portfolio:
+  dir: ~/.local/state/stonks
+  initial_budget_usd: 10000
+  max_leverage: 3