§ 00 / Prospectus Issue 01 · April 2026

The design is the estimate is the cert.

Agent-first construction automation for uk electrical contractors.
§ 01 / The Problem Observed · 30 years on site

The same job, rebuilt six times.

The same circuit gets entered across design, estimate, purchase order, test certificate, O&M manual, and payment application. Each re-entry is a chance to introduce error. Each re-entry is a person whose job is essentially data transcription.

We digitised the certificate. We didn't connect the job.
§ 02 / The Thesis One object · Every output

Place a component on a drawing. The whole job updates.

The system connects it to the local DB, creates the circuit, costs each element, allocates installation time, adds the circuit to the EIC, and pushes the same details into the O&M. One action, multiple consequences. One data model, many outputs.

§ 03 / Product Status Honest · As of Q2 2026

What exists. What's emerging. What's still a thesis.

Maturity is declared, not implied. Demo magic is worthless without production reality.

01 · Live Production

Certificates & reference tools

EIC, EICR, MWC and nine more cert types. Max Zs, RCD times and BS 7671 Amendment 4 references shipping to working electricians daily.

12 cert types 3 public tools live
02 · Active build In progress

Remedials & estimating

Observation-to-quote for EICR remedials. Standalone estimating engine with costed circuits and labour hours as the platform asset.

Sprint 2D · merged Early pilots
03 · R&D Emerging

Drawing & spatial extraction

Vector PDF import, room identification, symbol counting. ML-led project intelligence under active development — not production ready.

32k vector primitives 17 rooms · verified
04 · Horizon Thesis

Design → estimate → cert → twin loop

The full single-substrate vision. Still a thesis. Shipped proof in §01 and §02 is the ladder there.

Directional · years, not quarters
§ 04 / Reference Layer Already live · Already useful

Useful tools, shipping every day to working electricians.

Prekon is being built in public. The reference layer proves the publishing strategy.

Reference · Fault loop impedance maxzs.co.uk ↗

Max Zs Values

A fast lookup of BS 7671 maximum permitted Zs values, Cmin-corrected.

BS 7671 A4 · 2026 On-site tool
Reference · RCD protection rcddisconnectiontime.co.uk ↗

RCD Disconnection Time

Fast lookup for BS 7671 RCD disconnection times, fault protection, and additional protection checks.

BS 7671 RCDs On-site tool
Guide · Regulation reader bs7671amendment4.co.uk ↗

Amendment 4 Guide

Plain-English companion to Amendment 4 of BS 7671. Changed regulations indexed, cross-referenced, annotated.

Amendment 4 Annotated Free
§ 05 / Notes from the build All notes →

Writing as the work happens.

14 APR 2026 Market Interpretation

The gap between AI theory and workflow reality

Anthropic's labour-market research flags Architecture & Engineering as one of the widest gaps between theoretical AI suitability and observed usage. That's not a warning — it's the market.

6 min
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