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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
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