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-Welcome to the Wiki.
+# FP&A Engine — Wiki
+ 
+A REST API for corporate budget management, actuals ingestion, and variance reporting. Built to replace the manual Excel workflows that FP&A teams run every month.
+ 
+---
+ 
+## Pages
+ 
+- [Getting Started](Getting-Started)
+- [Architecture](Architecture)
+- [API Reference](API-Reference)
+- [Finance Concepts](Finance-Concepts)
+- [Configuration](Configuration)
+- [Development Guide](Development-Guide)
+ 
+---
+ 
+## What Is This?
+ 
+Every month, finance teams export actuals from their ERP, paste them into spreadsheets, and manually calculate budget vs. actual variances by department and GL account. It's slow, error-prone, and breaks the moment someone touches the wrong cell.
+ 
+The FP&A Engine moves that logic into a versioned, auditable API. Budget data lives in a structured schema. Actuals are ingested on demand. Variance reports — with favourability flags, percentage deltas, and absolute figures — are available instantly for any department, fiscal period, or budget version.
+ 
+---
+ 
+## Quick Start
+ 
+```bash
+git clone https://git.samantha42.xyz/samantha/FPandA-Engine
+cd FPandA-Engine
+cp .env.example .env
+go mod tidy
+go run ./main.go
+# API on http://localhost:8080
+# fpa.db created automatically on first run
+```
+ 
+---
+ 
+## Tech Stack
+ 
+| Layer | Choice |
+|---|---|
+| Language | Go |
+| Routing | `net/http` stdlib (Go 1.22+) |
+| Database | SQLite via `modernc.org/sqlite` |
+| Schema | Auto-migrated on startup |
+