Codex Knowledge Base
Vibe Coding vs Agentic Engineering: A Senior Developer's Framework
On 2 February 2025, Andrej Karpathy posted a throwaway tweet about a new style of programming he called vibe coding: you fully give in to the vibes.
Codex CLI Subagent Gotchas: Known Issues and Workarounds (March 2026)
If you're building agentic pod workflows with Codex CLI subagents, here are the practical bugs and undocumented behaviours you'll hit — and how to work.
OpenAI's Superapp Pivot: What the ChatGPT + Codex + Atlas Merger Means for Practitioners
On March 19, 2026, The Wall Street Journal published details from an internal OpenAI memo written by Fidji Simo (CEO of Applications) announcing a major.
Designing Workflows for Codex-Spark: When Inference Becomes Near-Instant
At 65–70 tokens per second, a 400-token code response takes roughly 6 seconds — a noticeable pause.
GPT-5.1-Codex-Max: Long-Horizon Tasks, Native Compaction and 24-Hour Sessions
Most Codex tasks complete in minutes. But some tasks — a full microservice migration, a large-scale refactor across 50+ files, a days-long debugging session.
Codex CLI + GitHub Actions: The Complete Integration Guide
The openai/codex-action GitHub Action lets you run the Codex CLI inside any GitHub Actions workflow — gating PRs on AI-driven code review, auto-fixing.
Mid-Turn Steering in Codex CLI: Redirecting Agents in Flight
The default posture for working with agentic tools has always been: write a careful prompt, send it, wait, evaluate the output, and iterate.
Codex CLI for Jupyter Notebooks and Scientific Python
Jupyter notebooks are the lingua franca of scientific Python, yet the .ipynb format is one of the environments where Codex CLI historically performs least.
Codex CLI Incident Response: Automating On-Call with Agents
Wire PagerDuty/Datadog alerts into Codex CLI agentic workflows for AI-driven incident investigation and patch generation.
Codex CLI in 2027: Reading the Roadmap
OpenAI does not publish a product roadmap for Codex CLI. What it does publish — obsessively, in sub-weekly releases — is a changelog.