# sit with sid full index > Extended LLM-readable content map for sit with sid. Home: https://sudosid.me/ Blog: https://sudosid.me/blog Series index: https://sudosid.me/blog/series Compact index: https://sudosid.me/llms.txt Sitemap: https://sudosid.me/sitemap.xml RSS: https://sudosid.me/feed.xml ## Development Using Claude Code or Codex A practical 9-part series that turns your day-to-day SDLC workflow into reusable skills shared across Claude Code and Codex. Series URL: https://sudosid.me/blog/development-using-claude-code-or-codex Published parts: 9/9 - Part 1: Part 1: gstack Pros, Cons, and Mode Selection URL: https://sudosid.me/blog/development-using-claude-code-or-codex/gstack-pros-cons-and-mode-selection Date: 2026-04-07 Reading time: 3 min read Summary: How to evaluate Garry Tan's gstack, where it shines, where it adds overhead, and a skill to decide when to use it. Labels: ai-agents, workflow, mode-selection, gstack - Part 2: Part 2: Workflow Orchestrator from PRD to Production URL: https://sudosid.me/blog/development-using-claude-code-or-codex/workflow-orchestrator-from-prd-to-production Date: 2026-04-08 Reading time: 2 min read Summary: Encode your complete day-to-day delivery flow into one orchestrator skill used by Claude Code and Codex. Labels: workflow, orchestration, prd, production - Part 3: Part 3: PRD Intake Skill URL: https://sudosid.me/blog/development-using-claude-code-or-codex/prd-intake-skill Date: 2026-04-09 Reading time: 2 min read Summary: Turn raw PM docs into implementation-ready engineering context with one reusable PRD intake skill. Labels: prd, requirements, planning - Part 4: Part 4: Task Breakdown Skill URL: https://sudosid.me/blog/development-using-claude-code-or-codex/task-breakdown-skill Date: 2026-04-10 Reading time: 1 min read Summary: Convert PRD intake output into executable engineering tasks with sequencing, ownership, and risk visibility. Labels: task-breakdown, planning, execution - Part 5: Part 5: Task Implementation Skill URL: https://sudosid.me/blog/development-using-claude-code-or-codex/task-implementation-skill Date: 2026-04-11 Reading time: 1 min read Summary: Execute one task at a time with strict scope, test-first checkpoints, and clean handoff notes. Labels: implementation, testing, delivery - Part 6: Part 6: Code Review Gate Skill URL: https://sudosid.me/blog/development-using-claude-code-or-codex/code-review-gate-skill Date: 2026-04-12 Reading time: 1 min read Summary: Create a consistent AI-assisted review gate that catches regressions and forces risk-aware review notes. Labels: code-review, quality, risk-management - Part 7: Part 7: QA Execution Skill URL: https://sudosid.me/blog/development-using-claude-code-or-codex/qa-execution-skill Date: 2026-04-13 Reading time: 1 min read Summary: Run repeatable QA with risk-based test charters, bug reporting format, and regression follow-through. Labels: qa, testing, regression - Part 8: Part 8: UAT Signoff Skill URL: https://sudosid.me/blog/development-using-claude-code-or-codex/uat-signoff-skill Date: 2026-04-14 Reading time: 1 min read Summary: Drive user acceptance testing with business-facing scenarios, evidence capture, and explicit signoff decisions. Labels: uat, stakeholder-signoff, release-readiness - Part 9: Part 9: Production Deployment and Sanity Skill URL: https://sudosid.me/blog/development-using-claude-code-or-codex/production-deploy-and-sanity-skill Date: 2026-04-15 Reading time: 2 min read Summary: Ship safely with a release skill that handles preflight checks, controlled rollout, and immediate post-deploy validation. Labels: deployment, production, operations