cambiums by from cambium (n.) — the living layer where a tree lays down its rings.

An operating system for the AECArchitecture · Engineering · Construction industry, built with agentic engineering.

DEFiNE and Polar Engineering run on it — a small fleet of agents, each with one job, sharing one record of the work.

What it does

Eight surfaces, one backbone.

Every part of the practice routes through the same system — from the first inquiry to the last invoice.

01 · projects

Every job, from intake to closeout.

Drawings, RFIs, change orders, milestones, dollars owed — one project record carried through the whole lifecycle.

02 · field

Whatever comes from site, routed.

Voicenotes, photos, texts, emails — every channel from the field lands in the right project record without manual filing.

03 · money

Money

Books for every entity, every dollar tied to a job, reconciled overnight.

04 · contracts

Contracts

Drafted, reviewed, redlined, and signed without leaving the system.

05 · people

People

Payroll, time, certifications, insurance — and the vehicles and tools that go with them.

06 · proposals

Proposals

Estimates, quotes, and bids drafted and tracked. Every assumption shown.

07 · procurement

Procurement

Purchase orders, vendor history, price tracking. Every receipt tied to a job.

08 · communication

Communication

Briefs, reports, and notifications drafted from the practice's own records.

How it works

Capture, distill, recall.

What goes in stays available — without being filed by hand.

01 · CAPTURE voicenote email photo message file ingest 02 · DISTILL projects 128 money 8.4k contracts 412 people 23 vehicles 7 extract 03 · RECALL brief draft report alert summary
01 · capture

Every inbound channel — voicenote, email, photo, message — lands in the system without sorting.

02 · distill

Each fact goes to one canonical substrate. Projects, money, contracts, people, vehicles each have a home. Nothing duplicated.

03 · recall

When you start a brief or draft, the system reads back the relevant prior context. No search needed.

The method

Agentic engineering, in plain terms.

Agentic engineering means treating AI as engineering material — not as a chatbot. An agent is a program that pursues a goal, remembers what happened, and uses real tools to act in the world.

The boundary between human work and agent work stays explicit: anything that needs judgement belongs to a person. Everything else can be agent work.

Where the line falls

Humans decide. Agents do.

Human Sign contracts Hire crews Take a job Send money Close deals
Agent Draft proposals Redline contracts Reconcile books Route field messages Surface follow-ups
Used by

Where it runs today.

Two practices in different roles, on the same system. Each uses the parts that match its work.

A · New York DEFiNE

Design, development, construction. Ground-up residential, retail rollouts, commercial fit-outs.

  • Every active project tracked from inquiry through closeout — drawings, RFIs, change orders, payment requisitions.
  • Books for every entity reconciled overnight; every dollar tied back to a job code.
  • Site photos, voicenotes, and field messages routed into the project record without manual filing.
  • Subcontractor COIs, certifications, and W-9s tracked alongside their POs.
B · NY / NJ Polar Engineering

Professional engineering. Permit filings, structural reviews, inspections, existing-condition reports.

  • Permit filings and inspection coordination across both states from one queue.
  • Drafts pull in context from prior similar projects automatically — calc sheets, sealed details, AHJ history.
  • Field inspection notes and photos sync to the project record on the same day.
  • The licensed engineer reviews and seals; the system handles the paperwork between.