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Refactor economics to expense-record ledger with correct Bubble cost

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Replace pre-aggregated costs.json with expense_records.json (48 line-item
records) and payment_records.json. All monthly and cumulative totals are
computed deterministically in observatory/ledger.py. Correct Bubble.io to
$32/mo (since Feb 2025) — infrastructure €69.44/mo not €72.20.
This commit is contained in:
Bernd Worsch
2026-06-22 02:03:22 +02:00
parent ea2c2c6403
commit 31db9f8f31
12 changed files with 843 additions and 299 deletions
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61
projects/coulomb-pricing/reports/economics-2026-06.md
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@@ -5,7 +5,9 @@
**Active pricing model:** Standard Membership (8.99 EUR/monthly)
> Platform costs accrue to the operator. Customer cost-pass-through billing is
> **not active** in MVP — members pay subscription only.
> **not active** in MVP — members pay subscription only. All totals are computed
> programmatically from expense and payment record ledgers (48 expense
> records).
## Key Metrics (current period)
@@ -13,13 +15,13 @@
|--------|------:|
| Active members | 1 |
| Member payments (gross) | 8.99 EUR |
| Infrastructure cost | 72.20 EUR |
| Infrastructure cost | 69.44 EUR |
| Payment processing cost | 0.38 EUR |
| Total platform cost | 72.58 EUR |
| Platform cost per member | 72.58 EUR |
| Period gross margin | -63.59 EUR |
| Period gross margin % | -707.3% |
| Period net liquidity | -63.59 EUR (burning) |
| Total platform cost | 69.82 EUR |
| Platform cost per member | 69.82 EUR |
| Period gross margin | -60.83 EUR |
| Period gross margin % | -676.6% |
| Period net liquidity | -60.83 EUR (burning) |
_Period net liquidity = net member payments − infrastructure cost (processing fees already netted from payments)._
_Revenue source: manual_
@@ -30,33 +32,33 @@ _Revenue source: manual_
|--------|------:|
| Initial budget | 1000.00 EUR |
| Cumulative member payments (net) | 68.88 EUR |
| Cumulative infrastructure cost | 1155.20 EUR |
| Cumulative infrastructure cost | 1111.04 EUR |
| Cumulative payment processing | 3.04 EUR |
| Cumulative total platform cost | 1158.24 EUR |
| Cumulative net liquidity | -1086.32 EUR (burning) |
| Remaining budget | -86.32 EUR (over budget) |
| Cumulative total platform cost | 1114.08 EUR |
| Cumulative net liquidity | -1042.16 EUR (burning) |
| Remaining budget | -42.16 EUR (over budget) |
| Months tracked | 16 |
## Monthly History
| Period | Members | Gross revenue | Infrastructure | Processing | Total platform | Net liquidity |
|--------|--------:|--------------:|---------------:|-----------:|---------------:|--------------:|
| 2025-03 | 0 | 0.00 | 72.20 | 0.00 | 72.20 | -72.20 |
| 2025-04 | 0 | 0.00 | 72.20 | 0.00 | 72.20 | -72.20 |
| 2025-05 | 0 | 0.00 | 72.20 | 0.00 | 72.20 | -72.20 |
| 2025-06 | 0 | 0.00 | 72.20 | 0.00 | 72.20 | -72.20 |
| 2025-07 | 0 | 0.00 | 72.20 | 0.00 | 72.20 | -72.20 |
| 2025-08 | 0 | 0.00 | 72.20 | 0.00 | 72.20 | -72.20 |
| 2025-09 | 0 | 0.00 | 72.20 | 0.00 | 72.20 | -72.20 |
| 2025-10 | 0 | 0.00 | 72.20 | 0.00 | 72.20 | -72.20 |
| 2025-11 | 1 | 8.99 | 72.20 | 0.38 | 72.58 | -63.59 |
| 2025-12 | 1 | 8.99 | 72.20 | 0.38 | 72.58 | -63.59 |
| 2026-01 | 1 | 8.99 | 72.20 | 0.38 | 72.58 | -63.59 |
| 2026-02 | 1 | 8.99 | 72.20 | 0.38 | 72.58 | -63.59 |
| 2026-03 | 1 | 8.99 | 72.20 | 0.38 | 72.58 | -63.59 |
| 2026-04 | 1 | 8.99 | 72.20 | 0.38 | 72.58 | -63.59 |
| 2026-05 | 1 | 8.99 | 72.20 | 0.38 | 72.58 | -63.59 |
| 2026-06 | 1 | 8.99 | 72.20 | 0.38 | 72.58 | -63.59 |
| 2025-03 | 0 | 0.00 | 69.44 | 0.00 | 69.44 | -69.44 |
| 2025-04 | 0 | 0.00 | 69.44 | 0.00 | 69.44 | -69.44 |
| 2025-05 | 0 | 0.00 | 69.44 | 0.00 | 69.44 | -69.44 |
| 2025-06 | 0 | 0.00 | 69.44 | 0.00 | 69.44 | -69.44 |
| 2025-07 | 0 | 0.00 | 69.44 | 0.00 | 69.44 | -69.44 |
| 2025-08 | 0 | 0.00 | 69.44 | 0.00 | 69.44 | -69.44 |
| 2025-09 | 0 | 0.00 | 69.44 | 0.00 | 69.44 | -69.44 |
| 2025-10 | 0 | 0.00 | 69.44 | 0.00 | 69.44 | -69.44 |
| 2025-11 | 1 | 8.99 | 69.44 | 0.38 | 69.82 | -60.83 |
| 2025-12 | 1 | 8.99 | 69.44 | 0.38 | 69.82 | -60.83 |
| 2026-01 | 1 | 8.99 | 69.44 | 0.38 | 69.82 | -60.83 |
| 2026-02 | 1 | 8.99 | 69.44 | 0.38 | 69.82 | -60.83 |
| 2026-03 | 1 | 8.99 | 69.44 | 0.38 | 69.82 | -60.83 |
| 2026-04 | 1 | 8.99 | 69.44 | 0.38 | 69.82 | -60.83 |
| 2026-05 | 1 | 8.99 | 69.44 | 0.38 | 69.82 | -60.83 |
| 2026-06 | 1 | 8.99 | 69.44 | 0.38 | 69.82 | -60.83 |
## Pricing Model Registry
@@ -70,8 +72,7 @@ _Revenue source: manual_
- Product model (`data/product.json`)
- Budget (`data/budget.json`)
- Pricing model registry (`data/pricing-models.json`)
- Platform costs (`data/costs.json`)
- Member payments (`data/revenue.json`)
- Expense records (`data/expense_records.json`) — source of truth for costs
- Payment records (`data/payment_records.json`)
- Membership (`data/membership.json`)
- Requirements (`REQUIREMENTS.md`)