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name: billing-skill description: Billing and quota management system for real_deal platform including tiered storage limits, capacity packs, job slot quotas, usage metering, and charge tracking. Use when implementing billing features, managing quotas, tracking usage, creating capacity packs, or handling payment transactions.

Billing & Quota Management

Billing Model

Storage Tiers

• Free Tier: 2GB storage, 5GB/month bandwidth, 60min/month transcoding
• Capacity Packs: One-time purchase for additional storage/bandwidth
• Overage: Metered billing with user confirmation

Job Quotas

• Free: Max 2 active jobs
• Quota Packs: 5/20/50/100 job slots (one-time or subscription)
• Expiration: Requires explicit renewal

Theme/Skin Store

• Fixed price or time-limited bundles
• Creator revenue sharing (with caps and tiered reductions)
• Performance and accessibility requirements enforced

Data Models

Usage Tracking

• UsageMeter - Track storage, bandwidth, transcoding time
• Quota - Current limits for user/company
• CapacityPack - Purchased capacity bundles
• JobSlot - Active job slot allocation

Billing Records

• ChargeRecord - Payment history
• UsageSnapshot - Periodic usage snapshots

Key Operations

Storage Metering

Copy// Track upload size
func RecordUpload(userID string, size int64) error {
    usageMeter.UpdateStorage(userID, size)
    quota.CheckExceeded(userID)
}

Job Slot Allocation

Copy// Allocate job slot
func AllocateJobSlot(companyID string) error {
    if !quota.Available(companyID) {
        return ErrQuotaExceeded
    }
    return jobSlot.Allocate(companyID)
}

Capacity Pack Purchase

Copy// Process pack purchase
func PurchaseCapacityPack(userID string, packType string) error {
    pack := GetPack(packType)
    quota.Increase(userID, pack.Storage, pack.Bandwidth)
    charge := ChargeRecord{
        UserID: userID,
        Amount: pack.Price,
        Type:   "capacity_pack",
    }
    return charges.Save(charge)
}

Usage Monitoring

Real-time Metrics

• Storage usage per user/company
• Bandwidth consumption
• Job slot utilization
• Transcoding time used

Alerts

• Quota approaching limit (80% warning)
• Exceeded quota (soft block)
• Overage confirmation required

Billing Dashboard

User View

• Current quota vs. used
• Usage history charts
• Capacity pack options
• Purchase history
• Estimated overage costs

Admin View

• Revenue metrics
• Popular pack types
• Usage patterns
• Outstanding balances

Common Tasks

Add New Quota Type

1. Define quota field in Quota model
2. Implement metering logic in UsageMeter
3. Add tracking points in relevant handlers
4. Create UI for quota display
5. Set up alerts for limit approaching

Create Capacity Pack

1. Define pack in CapacityPack collection
2. Set storage/bandwidth/transcoding limits
3. Configure pricing
4. Add to purchase flow

Implement Overage Billing

1. Detect quota exceeded
2. Pause service (soft/hard block)
3. Prompt user for overage confirmation
4. Calculate overage charges
5. Generate ChargeRecord