Development Using Claude Code or Codex

How to evaluate Garry Tan's gstack, where it shines, where it adds overhead, and a skill to decide when to use it.

Encode your complete day-to-day delivery flow into one orchestrator skill used by Claude Code and Codex.

Turn raw PM docs into implementation-ready engineering context with one reusable PRD intake skill.

Convert PRD intake output into executable engineering tasks with sequencing, ownership, and risk visibility.

Execute one task at a time with strict scope, test-first checkpoints, and clean handoff notes.

Create a consistent AI-assisted review gate that catches regressions and forces risk-aware review notes.

Run repeatable QA with risk-based test charters, bug reporting format, and regression follow-through.

Drive user acceptance testing with business-facing scenarios, evidence capture, and explicit signoff decisions.

Ship safely with a release skill that handles preflight checks, controlled rollout, and immediate post-deploy validation.