Codex Knowledge Base
Agent Interoperability Protocols and Codex CLI: MCP, ACP, and A2A in Practice
Three agent interoperability protocols now compete for the plumbing underneath every coding agent workflow: the Model Context Protocol (MCP) for tool.
The AI Coding Productivity Paradox: What Three Major Studies Reveal and How to Configure Codex CLI for Genuine Speed Gains
Ninety-three per cent of developers now use AI coding tools. Adoption is near-universal. Yet three independent research programmes — METR's randomised.
The Agent Logging Gap: Why Codex CLI Agents Under-Log and How to Enforce Observability Standards
A fresh empirical study analysing 4,550 agent-generated pull requests has quantified what many senior engineers already suspected: AI coding agents.
Agent-Generated Code Churns Faster: What 110,000 Pull Requests Reveal and How to Configure Codex CLI for Durable Output
A new MSR 2026 study of 110,000 open-source pull requests across five coding agents finds that agent-generated code is rewritten and deleted significantly.
Codex CLI v0.128: Goal Workflows, Configurable Keymaps, and Built-In Self-Update
Version 0.128.0, released on 30 April 2026, is a feature-dense release that finally delivers three capabilities the community has requested for months.
Codex CLI Service Tiers Explained: Flex, Standard, and Fast Mode for Cost and Speed Optimisation
Every codex exec invocation and every interactive session burns tokens. Whether you are running a quick lint fix or a six-hour codebase migration.
Codex CLI and OpenAI Privacy Filter: Preventing PII Leakage in Agent Workflows with Local On-Device Scanning
When a coding agent reads your codebase, it ingests everything in its context window — configuration files, test fixtures, log samples, database seeds.
Codex CLI Named Profiles: A Cookbook of Ready-to-Use Configuration Templates
Named profiles are one of the most underused features in Codex CLI. Instead of juggling CLI flags or maintaining separate config files.
Codex CLI exec Recipes: Practical One-Liners and Shell Patterns for Daily Development
The interactive TUI gets most of the attention, but codex exec is where Codex CLI earns its keep in professional workflows. It runs Codex non-interactively.
Documentation MCP Servers for Codex CLI: Context7, Repomix, and Live Library Lookups
Every coding agent hallucinates API calls eventually. The model's training data has a cutoff, libraries ship breaking changes quarterly, and the agent.