02Personal product · 2026

RABmate AI

An app for drafting cost estimates (RAB) and the documents that follow, from quotation to handover report. Its assistant runs locally on the user's machine and only reads data, it never changes a number.

GitHub

RABmate AI dashboard with project and estimate summaries

Overview

RABmate AI helps estimating, project, and finance teams draft cost estimates (RAB) and the documents that follow them: quotations, invoices, work orders (SPK), and handover reports (BAST). It covers many kinds of projects, from construction and fabrication to IT and professional services.

Three principles run through the whole app: numbers are computed on the server, every price has a source, and the AI only assists while people make the decisions.

backend tests: 534
frontend tests: 188
access roles: 6

Main stack

Next.js
FastAPI
PostgreSQL
Ollama
Docker

Modules

Estimates: material, service, labour, and equipment items; tax and discounts; versions, version comparison, approval; XLSX import and export.
A price catalogue with per-item history, suppliers, references, and approver verification.
Issued documents with official numbers, frozen snapshots, a verification code on every page, and in-browser PDF preview.
Quotations with payment terms, invoices per term, and partial payments with outstanding balances.
Work orders from accepted quotations, and partial or final handovers with cumulative volume control.

Local AI assistant

Runs on the user's machine through Hermes Agent and Ollama, with no cloud fallback.
Drafts estimate items from a description and extracts items from PDF, XLSX, or CSV files with page and row references.
Project chat answers from project data with cited sources; every answer is checked in code and flagged when doubtful.
Reads only through read-only tools: it never edits an estimate or issues a document.

Stack and security

Next.js 16 frontend, strict TypeScript, TanStack Query, React Hook Form and Zod.
FastAPI backend, SQLAlchemy 2, Alembic, ReportLab for PDFs, PostgreSQL 17 in Docker.
Server-side sessions with CSRF tokens, Argon2id passwords, and per-organisation data isolation on every query.
534 backend tests and 188 frontend tests, including an 11-step MVP acceptance test.

Screenshots

Estimate workspace: versions, sourced items, and the cost summary.

Project chat with the local assistant — Project chat: local model answers with cited sources.

Issued documents: frozen snapshots, stored files, integrity hashes.

Price catalogue: verified prices kept apart from the latest ones.

Overview

Three principles run through the whole app: numbers are computed on the server, every price has a source, and the AI only assists while people make the decisions.

Modules

Estimates: material, service, labour, and equipment items; tax and discounts; versions, version comparison, approval; XLSX import and export.

A price catalogue with per-item history, suppliers, references, and approver verification.

Issued documents with official numbers, frozen snapshots, a verification code on every page, and in-browser PDF preview.

Quotations with payment terms, invoices per term, and partial payments with outstanding balances.

Work orders from accepted quotations, and partial or final handovers with cumulative volume control.

Local AI assistant

Runs on the user's machine through Hermes Agent and Ollama, with no cloud fallback.

Drafts estimate items from a description and extracts items from PDF, XLSX, or CSV files with page and row references.

Project chat answers from project data with cited sources; every answer is checked in code and flagged when doubtful.

Reads only through read-only tools: it never edits an estimate or issues a document.

Stack and security

Next.js 16 frontend, strict TypeScript, TanStack Query, React Hook Form and Zod.

FastAPI backend, SQLAlchemy 2, Alembic, ReportLab for PDFs, PostgreSQL 17 in Docker.

Server-side sessions with CSRF tokens, Argon2id passwords, and per-organisation data isolation on every query.

534 backend tests and 188 frontend tests, including an 11-step MVP acceptance test.