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AI SDLC

- 1 min read - 200 words
Brett Dargan
Brett Dargan
Principal Solutions Architect (AWS) | Tech Co-Founder | Product Strategy & Business Value

Another great Beyond Coding interview AWS Veteran: The New Software Development Life Cycle - YouTube.

The most practical takeaway is Lessa’s model cost discipline. After a single refactor cost 200 million tokens because Opus was “overthinking” every line, he split the workflow into three tiers:

Tier 1 — SOTA models (Opus, Sonnet): planning, spec writing, architecture decisions only Tier 2 — Mid-tier models: 70–80% of implementation work Tier 3 — Cheap models: code review, linting, adversarial checks

Product loop

  1. discovery Human
  2. whiteboard Human
  3. /roadmap Human+AI
  4. /roadmap —sync
  5. /new-work Human+AI
    • dev loop

Dev loop (Heitor Lessa)

  1. /opsx:explore - human+agent sota
  2. /opsx:plan - human+agent sota
  3. /opsx:apply - agent
  4. refinement - human+agent
  5. merge-check - agent+gate
  6. review & merge - human
  7. /retro - human. workflow loop

Taming mono-repo

- 1 min read - 100 words
Brett Dargan
Brett Dargan
Principal Solutions Architect (AWS) | Tech Co-Founder | Product Strategy & Business Value

2026-07-24

Setting up a new project(s) and I’m still looking for improvements that give me flexibility.

In particular, wanting to use deno more and do use expo for mobile clients.

Inspired by this article, feel this will be very helpful: