NetForge/.planning/phases/04-inventory-expenses-and-financial-reports/04-04-SUMMARY.md

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, duration, completed

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	duration	completed
04-inventory-expenses-and-financial-reports	04	reports, accounting	expense-reports audit-trail journal-entries ACCT-08 prisma	phase provides 04-03 ExpenseService, VendorService, expense categories, vendor model phase provides 02-02 JournalEntryService, referenceType/referenceId on JEs	ExpenseReportService with category/vendor/summary aggregation AuditTrailService with JE audit trail (ACCT-08 compliance) Expense report API routes JE audit trail API route		added patterns Expense aggregation in JS from Prisma findMany (same pattern as outstanding reports) AuditTrailService works across all JE sources via referenceType/referenceId	created modified src/lib/services/expense-report-service.ts src/lib/services/audit-trail-service.ts src/app/api/reports/expenses/route.ts src/app/api/reports/expenses/by-vendor/route.ts src/app/api/accounting/journal-entries/[id]/audit/route.ts src/lib/__tests__/expense-report-service.test.ts	Expense aggregation done in JS after findMany (same pattern as outstanding reports, collector balances) AuditTrailService queries JEs by referenceType+referenceId -- works for all sources (Invoice, Payment, Expense, Collection, etc.) No Vendor bucket uses null vendorId key in grouping -- expenses without vendor are still reported	AuditTrailService pattern: getJournalEntryAudit for single JE, getAuditTrailForEntity for all JEs related to a source record	20min	2026-03-05

Phase 4 Plan 4: Expense Reports and Audit Trail Summary

ExpenseReportService aggregates spending by category/vendor with date filtering; AuditTrailService traces every JE to its creator and source transaction (ACCT-08)

Performance

• Duration: 20 min
• Started: 2026-03-05T06:35:27Z
• Completed: 2026-03-05T06:55:12Z
• Tasks: 2
• Files created: 6

Accomplishments

• Expense reports by category and vendor with date range filtering (only POSTED expenses)
• Full JE audit trail showing creator, timestamp, source reference, and line details
• Audit trail works across ALL JE sources (proven with Payment JE test)
• 9 passing integration tests covering reports, filtering, and cross-source audit

Task Commits

Each task was committed atomically:

1. Task 1: ExpenseReportService and AuditTrailService - 6bc24a3 (feat)
2. Task 2: Tests for expense reports and audit trail - 787b22e (test)

Files Created/Modified

• src/lib/services/expense-report-service.ts - Expense aggregation by category, vendor, and combined summary
• src/lib/services/audit-trail-service.ts - JE audit trail with creator, source reference, approval info
• src/app/api/reports/expenses/route.ts - GET expense summary by category (ADMIN)
• src/app/api/reports/expenses/by-vendor/route.ts - GET expense summary by vendor (ADMIN)
• src/app/api/accounting/journal-entries/[id]/audit/route.ts - GET JE audit trail (ADMIN, OFFICE_STAFF)
• src/lib/__tests__/expense-report-service.test.ts - 9 integration tests

Decisions Made

• Expense aggregation done in JS after findMany -- same pattern as outstanding reports and collector balances (acceptable for ISP scale)
• AuditTrailService queries by referenceType+referenceId, works for all JE sources without source-specific logic
• "No Vendor" bucket included in vendor reports for expenses without vendorId
• Decimal amounts serialized as strings in API responses (consistent with other report endpoints)

Deviations from Plan

None -- plan executed exactly as written.

Issues Encountered

• Plan specified npx jest for test verification but project uses Vitest -- used npx vitest run instead (not a code deviation, just a verification command difference)

User Setup Required

None -- no external service configuration required.

Next Phase Readiness

• Phase 4 is now fully complete (all 5 plans: 04-01 through 04-05)
• All financial reporting capabilities built: trial balance, income statement, balance sheet, expense reports, and audit trail
• Ready for Phase 5 (Portal and Dashboard)

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Phase: 04-inventory-expenses-and-financial-reports Completed: 2026-03-05