Codex Knowledge Base
Cross-Model Adversarial Review: Using Multiple AI Models to Catch Agent Blind Spots
The moment your coding agent reviews its own output, you have a problem. Not because the agent is dishonest.
The Codex TypeScript SDK: Embedding Agents in Your Own Tooling
The Codex CLI is powerful in interactive mode, but its real leverage comes when you embed it programmatically. The Codex TypeScript SDK (@openai/codex-sdk).
GPT-5.3-Codex-Spark: The Cerebras-Powered Ultra-Fast Coding Model
On 14 January 2026, OpenAI announced a multi-year partnership with Cerebras Systems. Four weeks later, on 12 February 2026, the first concrete output.
The codex-rs Architecture: How OpenAI Rewrote Codex CLI in Rust
When OpenAI open-sourced Codex CLI in April 2025, the codebase was TypeScript on Node.js — a deliberate choice for velocity.
Codex Model Lineage: The Context Compaction Breakthrough That Made Long-Horizon Agents Possible
If you've been using Codex CLI for agentic work, you've probably hit the wall: a long-running session starts hallucinating earlier decisions.
Codex as a GitHub Copilot Coding Agent: Assigning Issues and PRs at Scale
OpenAI Codex is no longer just a CLI tool you run locally. As of early 2026, Codex — alongside Claude — is available as a first-class coding agent inside.
Codex CLI in Regulated Environments: HIPAA, SOC 2, and Financial Services
Deploying AI coding agents in healthcare, financial services, or any SOC 2-audited environment introduces obligations that go well beyond performance or.
Codex CLI Personality System: Customising Agent Communication Style
Codex CLI's personality system lets you choose how the agent communicates — from terse and execution-focused to conversational and partner-like.
Codex CLI OpenTelemetry: Observability and Metrics in Production
Codex CLI ships built-in OpenTelemetry support for production observability — traces, logs, and metrics from every agent run.
Codex CLI for Mobile Teams: iOS, Android and Xcode 26.3
On February 3, 2026, Apple released Xcode 26.3 — described by the iOS developer community as the biggest change to how iOS developers write code since.