- Fix shouldBillToday() month-wrapping logic for PREPAID lead days
- POST /api/billing/generate — triggers monthly invoice generation cycle
- GET /api/invoices — paginated list with status/subscriber/date filters
- GET /api/invoices/[id] — invoice detail with lines and subscriber
- POST /api/invoices/[id]/void — void with JE reversal
Test coverage (38 tests):
- computeBillingPeriod pure function
- shouldBillToday: postpaid, prepaid, and month-wrapping edge case
- Invoice number sequencing per tenant/year
- Invoice generation: amounts, InvoiceLine, period dates
- Journal entries: DR AR (1100), CR Revenue (4010), balanced
- Idempotency: duplicate prevention via unique(subscriberId, periodStart)
- Credit auto-application: full, partial, zero credit, JE (DR 1150, CR 1100)
- Billing cycle: active-only, suspended/cancelled excluded, prepaid lead days
- Overdue detection: bulk update of DRAFT/SENT/PARTIAL past due date
- Void: JE reversal, already-voided guard, PAID guard
- getInvoice, listInvoices, status filtering
- Tenant isolation: Tenant B cannot see Tenant A invoices
- GET/POST /api/accounting/journal-entries (list + create manual entry)
- GET /api/accounting/journal-entries/[id] (single entry with lines)
- POST /api/accounting/journal-entries/[id]/approve (maker-checker approval)
- POST /api/accounting/journal-entries/[id]/reverse (create reversing entry)
- GET /api/accounting/accounts/[id]/balance (derived balance, never stored)
- All routes use closure pattern over withPermission HOF (same as periods/close)
- Add startDate parameter to getAccountBalance for date range queries
- 36 integration tests: balance enforcement, closed period, immutability,
reversals, maker-checker, entry numbering, account balance derivation,
trial balance self-verification
- Total test suite: 198 tests all passing
- Add JournalEntryStatus and JournalEntrySource enums to Prisma schema
- Add JournalEntry model with maker-checker fields, self-referential reversal relation, and audit timestamps
- Add JournalEntryLine model with debit/credit Decimal(15,2) fields
- Update Account model with journalEntryLines back-relation
- Update User model with createdJournalEntries and approvedJournalEntries back-relations
- Run migration: 20260304150817_add_journal_entry_models
- Add journalEntry and journalEntryLine to TENANT_SCOPED_MODELS in prisma-tenant.ts
- Create JournalEntryService with createEntry, approveEntry, reverseEntry, getAccountBalance, getTrialBalance
- Enforce debit=credit balance using integer cents comparison (avoids float issues)
- SYSTEM source entries auto-posted; MANUAL entries start as DRAFT for maker-checker
- Add AccountType, NormalBalance, PeriodStatus enums to schema
- Add Account model with tenant scoping, code/name/type/normalBalance/parentId
- Add AccountingPeriod model with year/month/status/closedAt/closedById
- Create ISP_CHART_OF_ACCOUNTS with 28 accounts across all 5 types (1000-5000 ranges)
- Create accounting-period.ts with getOpenPeriod, closePeriod, isDateInClosedPeriod
- Extend TENANT_SCOPED_MODELS with account and accountingPeriod
- Add full query extension blocks for account and accountingPeriod in withTenantContext
- Run migration: 20260304144656_add_accounting_models
Phase 02: Subscriber and Billing Core
- Implementation decisions documented
- Phase boundary established
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- withSuperAdmin() HOF: checks isSuperAdmin from session, returns 401/403
- GET /api/admin/tenants: lists all tenants with userCount, subscriberCount
- GET /api/admin/tenants/[id]: single tenant detail with users list
- POST /api/admin/tenants/[id]/suspend: suspend/activate with 7-day grace
- prisma/seed.ts: add Test ISP 2 tenant and admin2@demo.com for isolation tests
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Create src/lib/middleware/authorize.ts with withPermission() HOF
- Returns 401 for unauthenticated, 403 for unauthorized access
- Passes ability + user to authorized handlers for fine-grained checks
- Add authorize() convenience alias for handler-first usage pattern
- Create src/lib/__tests__/rbac.test.ts with 66 unit tests covering:
- Admin full access to all subjects
- Office Staff: can manage billing, blocked from Chart of Accounts
- Collector: can record payments, blocked from invoice management
- Technician: blocked from billing/payments (critical security boundary)
- Client: scoped to own data only
- Multi-role additive union (TECHNICIAN+COLLECTOR gets both sets)
- Super-admin bypasses all permission checks
- Fix CASL MongoAbility type: use createMongoAbility throughout
- Fix condition casting for string-based subjects (no Prisma models yet)
- Fix ability merging: cannot() rules excluded for multi-role union
- Install @casl/ability for role-based access control
- Create src/lib/casl/types.ts with AppAbility, AppSubjects, AppActions types
- Create src/lib/casl/permissions.ts with permission matrix for all 5 roles
- Create src/lib/casl/ability.ts with defineAbilityFor() factory function
- Support multi-role users via additive union of permissions
- Super-admin bypasses all permission checks via can("manage", "all")
- Create src/lib/prisma-tenant.ts:
- withTenantContext(tenantId) / createTenantPrisma — Prisma $extends client
- Intercepts findMany, findFirst, findUnique, create, createMany, update,
updateMany, delete, deleteMany, upsert, count, aggregate, groupBy on User
- Auto-injects tenantId filter on all reads, writes, and deletes
- setTenantRLS() helper for explicit RLS enforcement in transactions
- TENANT_SCOPED_MODELS constant for future extensibility
- Create prisma/migrations/20260304104214_initial_schema — baseline migration
capturing schema created by initial db push
- Create prisma/migrations/20260304104245_add_rls_policies:
- ALTER TABLE User ENABLE ROW LEVEL SECURITY
- CREATE POLICY tenant_isolation_user USING app.current_tenant_id session var
- Defense-in-depth architecture comments explaining primary vs secondary enforcement
- Create src/lib/__tests__/tenant-isolation.test.ts (6 tests, all passing):
- Test 1: Tenant A context returns only Tenant A's users (zero from B)
- Test 2: Tenant B context returns only Tenant B's users (zero from A)
- Test 3: create() auto-sets tenantId, invisible to other tenant
- Test 4: findUnique by Tenant B's ID under Tenant A context returns null
- Additional: findFirst cross-tenant blocked, count() is tenant-scoped
- Next.js 15 with App Router, TypeScript, Tailwind CSS (v4), ESLint
- docker-compose.yml with PostgreSQL 16, Redis 7, and app service
- Dockerfile (Node 20 alpine) for containerized development
- .env and .env.example with DATABASE_URL, DATABASE_URL_LOCAL, REDIS_URL
- src/app/page.tsx updated to render NetForge heading
- All three services start healthy with docker compose up -d
53 requirements across 12 categories
11 requirements deferred to v2
Full double-entry accounting with audit trail and derived balances
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Files:
- STACK.md
- FEATURES.md
- ARCHITECTURE.md
- PITFALLS.md
- SUMMARY.md
Key findings:
- Stack: Next.js 15 + TypeScript + PostgreSQL + Prisma monolith; BullMQ for billing cron jobs; MikroTik client needs library verification (LOW confidence)
- Architecture: Modular monolith with shared-DB multi-tenancy; JournalEntryService as sole ledger gateway; derived financial state (no balance fields)
- Critical pitfall: Cross-tenant data leakage + fake accounting + billing state machine must all be solved in Phase 1 before any feature work
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Multi-tenant SaaS platform for ISP operations management — billing, payments, inventory, technician job orders, and full accounting.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
