Business Systems & Platforms — Master Hub
Build correct, auditable, multi-tenant back-office and platform software: CRM, ERP, accounting,
affiliate programs, white-label products — on a shared foundation of tenant isolation and
tax/e-invoicing compliance. Money must be double-entry and auditable; tenants must be unreachable
from one another by construction; tax must be compliant where mandated. These are not optional polish.
How to use this hub
Each bundled skill's full instructions live in skills/<name>/GUIDE.md. Read the relevant GUIDE
before acting, and combine skills when a task spans areas — most real systems do.
Two foundational skills almost every task depends on:
multi-tenant-isolation — read it whenever the system serves more than one customer/org.accounting-finance — read it whenever money moves (ERP, affiliate payouts, billing).
Bundled skills (8)
- crm-builder — Contacts/accounts, configurable pipelines & kanban, weighted forecast, typed
activities, lead scoring, customer 360, dedup/merge, and SQL-enforced record permissions.
→ skills/crm-builder/GUIDE.md
- erp-builder — Modular monolith on one ledger: master data, perpetual inventory valuation
(FIFO/AVG/STD), stock-move↔journal atomicity, 3-way match, document state machines, gapless numbering.
→ skills/erp-builder/GUIDE.md
- accounting-finance — Double-entry ledger as source of truth: integer-minor-unit money, idempotent
posting, AR/AP, multi-currency (IAS 21), period close, reversals/credit notes, derived statements.
→ skills/accounting-finance/GUIDE.md
- accounting-system-complete — The full A→Z accounting application: COA, fiscal periods, GL,
AR/AP + aging, banking + reconciliation, tax, fixed assets/depreciation, multi-currency, budgeting,
period/year-end close, and derived statements (TB/P&L/Balance Sheet/Cash Flow) + the full menu/IA.
→ skills/accounting-system-complete/GUIDE.md
- affiliate-system — Server-side attribution (click_id + cookie + coupon), idempotent conversions,
percent/flat/tiered/recurring commissions, pending→approved→paid with clawback, ledgered payouts, fraud defense.
→ skills/affiliate-system/GUIDE.md
- white-label-platform — One codebase, N brands: host→tenant resolution, custom domains + automated
ACME TLS, runtime CSS-variable theming, white-labeled emails/PDFs/auth, feature flags, reseller layer, billing.
→ skills/white-label-platform/GUIDE.md
- multi-tenant-isolation (foundational) — Postgres RLS (
ENABLE+FORCE, SET LOCAL under
PgBouncer), shared-DB vs schema/DB-per-tenant trade-offs, RBAC→ABAC→ReBAC, sharding, residency, cross-tenant tests.
→ skills/multi-tenant-isolation/GUIDE.md
- einvoicing-compliance (foundational for money) — One VAT engine + 2026 mandates: KSA ZATCA Phase 2
(clearance, UBL 2.1, CSID, PIH hash chain, TLV QR), UAE Peppol/PINT AE via ASP, EU ViDA/EN 16931, Arabic/RTL invoices.
→ skills/einvoicing-compliance/GUIDE.md
Routing
| User wants… |
Start with |
Usually also read |
| Sales pipeline / leads / deals |
crm-builder |
multi-tenant-isolation |
| Inventory / orders / procurement / mfg |
erp-builder |
accounting-finance, einvoicing-compliance |
| Invoices / ledger / payments / statements |
accounting-finance |
einvoicing-compliance |
| Full accounting app (modules + menus A→Z) |
accounting-system-complete |
accounting-finance |
| VAT / ZATCA / UAE / EU e-invoicing |
einvoicing-compliance |
accounting-finance |
| Referral / affiliate / partner payouts |
affiliate-system |
accounting-finance |
| Reseller / multi-brand / custom domains |
white-label-platform |
multi-tenant-isolation |
| "Keep tenants' data separate" |
multi-tenant-isolation |
— |
Pairs well with
backend-api-master (auth, Stripe, integrations), payments-master (gateways/payouts),
tailwind-master (tailwind-design-tokens for white-label theming, RTL/Arabic), ui-master
(charts-and-dashboards for reporting), marketplace-master (multi-vendor commerce).
Note
Bundled skills are intentionally GUIDE.md (not SKILL.md) so only this master appears in the skills
list. Money/tax code: implement to the user's local standard (IFRS/GAAP, local tax law) and recommend a
professional review for regulated/audited books.
1---2name: business-master3description: Master hub for B2B business systems & platforms at staff/principal depth. Use to build CRM, ERP, double-entry accounting/finance, a complete A→Z accounting system (full menus), affiliate/ referral programs, white-label/multi-tenant products, Postgres multi-tenant isolation (RLS), and VAT/e-invoicing compliance (ZATCA, UAE Peppol, EU ViDA). Bundles 8 specialized skills in skills/<name>/GUIDE.md. Use for any business-platform, SaaS back-office, CRM, ERP, accounting, billing, tenancy, tax, or white-label task.4---56# Business Systems & Platforms — Master Hub78Build correct, auditable, multi-tenant back-office and platform software: CRM, ERP, accounting,9affiliate programs, white-label products — on a shared foundation of **tenant isolation** and10**tax/e-invoicing compliance**. Money must be double-entry and auditable; tenants must be unreachable11from one another by construction; tax must be compliant where mandated. These are not optional polish.1213## How to use this hub1415Each bundled skill's full instructions live in `skills/<name>/GUIDE.md`. **Read the relevant GUIDE16before acting**, and combine skills when a task spans areas — most real systems do.1718**Two foundational skills almost every task depends on:**19- **`multi-tenant-isolation`** — read it whenever the system serves more than one customer/org.20- **`accounting-finance`** — read it whenever money moves (ERP, affiliate payouts, billing).2122## Bundled skills (8)2324- **crm-builder** — Contacts/accounts, configurable pipelines & kanban, weighted forecast, typed25 activities, lead scoring, customer 360, dedup/merge, and **SQL-enforced** record permissions. 26 → `skills/crm-builder/GUIDE.md`27- **erp-builder** — Modular monolith on one ledger: master data, perpetual inventory valuation28 (FIFO/AVG/STD), stock-move↔journal atomicity, 3-way match, document state machines, gapless numbering. 29 → `skills/erp-builder/GUIDE.md`30- **accounting-finance** — Double-entry ledger as source of truth: integer-minor-unit money, idempotent31 posting, AR/AP, multi-currency (IAS 21), period close, reversals/credit notes, derived statements. 32 → `skills/accounting-finance/GUIDE.md`33- **accounting-system-complete** — The full A→Z accounting **application**: COA, fiscal periods, GL,34 AR/AP + aging, banking + reconciliation, tax, fixed assets/depreciation, multi-currency, budgeting,35 period/year-end close, and derived statements (TB/P&L/Balance Sheet/Cash Flow) + the full menu/IA. 36 → `skills/accounting-system-complete/GUIDE.md`37- **affiliate-system** — Server-side attribution (click_id + cookie + coupon), idempotent conversions,38 percent/flat/tiered/recurring commissions, pending→approved→paid with clawback, ledgered payouts, fraud defense. 39 → `skills/affiliate-system/GUIDE.md`40- **white-label-platform** — One codebase, N brands: host→tenant resolution, custom domains + automated41 ACME TLS, runtime CSS-variable theming, white-labeled emails/PDFs/auth, feature flags, reseller layer, billing. 42 → `skills/white-label-platform/GUIDE.md`43- **multi-tenant-isolation** *(foundational)* — Postgres RLS (`ENABLE`+`FORCE`, `SET LOCAL` under44 PgBouncer), shared-DB vs schema/DB-per-tenant trade-offs, RBAC→ABAC→ReBAC, sharding, residency, cross-tenant tests. 45 → `skills/multi-tenant-isolation/GUIDE.md`46- **einvoicing-compliance** *(foundational for money)* — One VAT engine + 2026 mandates: KSA ZATCA Phase 247 (clearance, UBL 2.1, CSID, PIH hash chain, TLV QR), UAE Peppol/PINT AE via ASP, EU ViDA/EN 16931, Arabic/RTL invoices. 48 → `skills/einvoicing-compliance/GUIDE.md`4950## Routing5152| User wants… | Start with | Usually also read |53|-------------|------------|-------------------|54| Sales pipeline / leads / deals | `crm-builder` | `multi-tenant-isolation` |55| Inventory / orders / procurement / mfg | `erp-builder` | `accounting-finance`, `einvoicing-compliance` |56| Invoices / ledger / payments / statements | `accounting-finance` | `einvoicing-compliance` |57| Full accounting app (modules + menus A→Z) | `accounting-system-complete` | `accounting-finance` |58| VAT / ZATCA / UAE / EU e-invoicing | `einvoicing-compliance` | `accounting-finance` |59| Referral / affiliate / partner payouts | `affiliate-system` | `accounting-finance` |60| Reseller / multi-brand / custom domains | `white-label-platform` | `multi-tenant-isolation` |61| "Keep tenants' data separate" | `multi-tenant-isolation` | — |6263## Pairs well with6465`backend-api-master` (auth, Stripe, integrations), `payments-master` (gateways/payouts),66`tailwind-master` (`tailwind-design-tokens` for white-label theming, RTL/Arabic), `ui-master`67(`charts-and-dashboards` for reporting), `marketplace-master` (multi-vendor commerce).6869## Note7071Bundled skills are intentionally `GUIDE.md` (not `SKILL.md`) so only this master appears in the skills72list. Money/tax code: implement to the user's local standard (IFRS/GAAP, local tax law) and recommend a73professional review for regulated/audited books.
Bodymobarez