Initial commit: prediction-market arb scanner + GHA alerts

- Monthly + hourly Kalshi/Polymarket arb scanner (stdlib-only Python).
- Live positions tab w/ realized P&L history.
- GitHub Actions cron workflow texts SMS via Apps Script webhook on
  newly-detected arbs. State persisted in alerts_state.json.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,15 @@
+# Secrets — never commit. Provide your own data/secrets.json locally.
+data/secrets.json
+
+# Python
+__pycache__/
+*.pyc
+
+# Local preview staging
+.arb-preview/
+
+# Local Claude Code config (launch.json, settings.local.json, worktrees, etc.)
+.claude/
+
+# macOS
+.DS_Store