ENGINEERING

The Build Log

Architecture deep-dives, agent engineering lessons, and what we learned building autonomous AI for real businesses.

June 12, 2026 — System Architecture

Why We Killed Our AI Calendar Agent — And Built Something Better

We replaced our AI booking agent with a dead-simple SQLite message daemon. Here's why it works better, costs less, and never hallucinates a booking. 3 AI agents replaced by 1 table and 60 lines of JavaScript.

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June 7, 2026 — Flagship Case Study

From Brick & Mortar to Fully Autonomous: The My Air Con Care Transformation

How we transformed a one-man air conditioning business into a fully autonomous operation — AI-powered SMS sales, calendar management, 6-gate compliance pipeline, automated marketing, and 24/7 customer service. Complete technical breakdown. Running cost: ~$65/month.

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June 7, 2026 — Engineering Case Study

Dev: The Follow-Up Agent Where The Real Money Is Made

How a 4-stage autonomous nurture engine recovers 70-80% of leads that go quiet after a quote. Nudge → Discount → Educate → Never Stop. The follow-up desk is where the margin lives. Real drafts from live testing.

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June 4, 2026 — Engineering Case Study

The Engineering Lesson of Archie V3: Why Smaller AI Agents Win

We rebuilt our autonomous trading agent from 1,200 lines into 385 lines. The smaller version outperformed the larger one within hours. Here's what we learned about over-engineering, bootstrap-driven architecture, and giving AI room to think.

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Coming Soon

The 6-Gate Pipeline: How Steve Never Double-Sends an SMS

Deep dive into the compliance pipeline that powers our SMS receptionist — fingerprint verification, per-phone locking, and the double-token send handshake.

Coming Soon

Bootstrap-Driven Architecture: Why Agent Brains Should Live in Markdown, Not Code

How we moved from hardcoded trading rules to a 35KB bootstrap folder that turns a 385-line Python script into a professional quantitative trader.

My Air Con Care — Live Content Engine

15 New Blog Posts: The Complete Central Coast Air Conditioner Survival Guide Series

From mould microbiology to tenant rights, energy savings to bushfire smoke — the full winter 2026 content series is live. 15 SEO-optimised posts driving organic traffic to a fully autonomous trade business. See the content engine in action.

Visit the MAC Blog →