Codex Knowledge Base
JavaScript-to-TypeScript Migration with Codex CLI: Gradual Typing Strategies for Large Codebases
Migrating a JavaScript codebase to TypeScript remains one of the most requested — and most dreaded — modernisation tasks in 2026.
Test-Driven Development with Codex CLI: Agent-Driven Red-Green-Refactor Workflows
The single most reliable technique for getting consistently correct output from a coding agent is also one of the oldest ideas in software engineering.
Codex CLI for Swift and iOS Teams: Xcode MCP, SwiftUI Skills, and Agent-Driven Apple Platform Development
Apple's integration of agentic coding into Xcode 26.3 in February 2026 transformed how iOS teams work with AI coding agents . Codex CLI now operates as both.
Codex CLI for Svelte and SvelteKit Teams: Runes, Svelte MCP, and Agent-Driven Component Workflows
Svelte 5's runes system fundamentally changed how reactivity works in the framework — replacing implicit $: declarations with explicit primitives like.
Codex CLI and Storybook MCP: Agent-Driven Component Development, Story Generation, and Visual Testing
Front-end teams spend a disproportionate amount of time on the mechanical parts of component development: writing stories, documenting props, building.
Codex CLI for Serverless Teams: AWS Lambda, SAM, CDK, and Agent Plugin Workflows
Serverless development has a peculiar shape: functions are small, but the surrounding configuration — IAM roles, event source mappings, API Gateway routes.
Rapid Prototyping with Codex CLI: From Screenshot to Working Application
Design handoff has always been a bottleneck. Designers produce pixel-perfect mocks; developers spend hours interpreting spacing tokens and hover states from.
Codex CLI OpenTelemetry Observability: Monitoring Agent Sessions, Token Spend, and Tool Decisions in Production
Codex CLI ships with built-in OpenTelemetry (OTel) instrumentation that exports traces, logs, and token-level metrics via OTLP . Unlike bolt-on wrappers.
Codex CLI for Open Source Maintainers: Issue Triage, PR Review, and Contributor Automation at Scale
Open source maintainers face a compounding problem: issue volumes grow faster than review capacity. A popular project with 50 open issues per week and three.
Codex CLI for Next.js Teams: App Router, Server Components, DevTools MCP, and Agent-Driven Full-Stack Workflows
Next.js 16 is the first major framework release built with AI coding agents as a first-class concern. Version-matched documentation ships inside.