Futures legs respect a firm's per-instrument contract limit

A firm can cap how many contracts of an instrument its accounts may hold
(the catalog's instrumentLimits, set on the master's Firms page). A leg
trades one contract per $1,000, capped by the account type's max contracts
and that limit. The Auto draw sizes each instrument's hold with the capped
count, so a limit that slows a leg past 12 hours takes it out of the draw.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lib/instrument-specs.ts

@@ -107,10 +107,24 @@ export function dailyMoveDollars(closes: number[], pointValue: number, barsPerDa
 }
 
 /** Contracts a futures leg trades: one per $1,000, capped by the account
- *  type's max contracts (0 = no cap) — the rule fireLeg sizes by. */
-export function futuresContracts(leg: number, maxPositionSize: number): number {
+ *  type's max contracts and the firm's limit on the instrument (0 = no
+ *  cap) — the rule fireLeg sizes by. */
+export function futuresContracts(leg: number, maxPositionSize: number, instrumentLimit = 0): number {
     const raw = Math.max(1, Math.ceil(leg / 1000));
-    return maxPositionSize > 0 ? Math.min(raw, maxPositionSize) : raw;
+    const caps = [maxPositionSize, instrumentLimit].filter((c) => c > 0);
+    return caps.length > 0 ? Math.min(raw, ...caps) : raw;
+}
+
+/** The most contracts a firm allows on one instrument, as its catalog entry
+ *  says: CME roots only, whole numbers from 1 to 1000. Anything else is
+ *  dropped — no limit beyond the account type's max contracts. */
+export function sanitizeInstrumentLimits(raw: unknown): Record<string, number> {
+    const out: Record<string, number> = {};
+    if (typeof raw !== 'object' || raw === null || Array.isArray(raw)) return out;
+    for (const [root, value] of Object.entries(raw as Record<string, unknown>)) {
+        if (CME_SPECS[root] && typeof value === 'number' && Number.isInteger(value) && value >= 1 && value <= 1000) out[root] = value;
+    }
+    return out;
 }
 
 /**