New arb/prepare.py + GET /api/prepare: for one monthly arb pair it re-pulls
fresh quotes (incl. real Kalshi top-of-book ask size) and builds the exact
order pair a cross-venue hedge would need -- sides from best_side, size
capped to the thinner book, limit = ask + slippage buffer, capital required,
guaranteed worst-case, and warnings. Places NO orders and touches no order
endpoints anywhere.
UI: a "Prepare trade" button in the monthly drawer's breakdown card opens a
PREVIEW-ONLY ticket modal (max-size + slippage-cent inputs that re-price live;
a deliberately disabled Confirm button as the Step-2 placeholder). Also
reorders the expanded drawer so the breakdown/Prepare card is the wide left
column.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
The paired view now recognizes cross-venue hedges economically (by what each
leg pays) instead of only matching curated pairs.json rows, and fills by
contract count: exact-strike (matched) pairs fill first, so a leg's excess
spills into the nearest basis pair only after every matched pairing is
exhausted. Partially consumed legs are pro-rated; size/cost/value/pnl conserve
exactly. Frontend shows matched / basis+ / basis- badges, strike band, and a
plain-English coverage note per row.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
calc.evaluate now reports NO POLY when the Kalshi side has data but the
Polymarket slug doesn't resolve (the common case: Polymarket renamed/
dropped a market while Kalshi still trades it). NO KALSHI is the reverse,
NO DATA only when both are missing. User caught this looking at BTC <70k
May: 20 of 118 pairs were silently NO-DATA when the real cause was Poly-
side absence — now visible as a dedicated NO POLY chip + filter button.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
- 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>
Casey Judice