Codex Knowledge Base
Codex CLI Memories: Native Session Persistence, Third-Party Memory MCP Servers, and Cross-Session Context Strategies
Every Codex CLI session starts with a blank slate. AGENTS.md and skills provide static context — project conventions, coding standards, tool preferences.
Codex CLI /goal Workflows: Persistent Long-Horizon Task Execution in v0.128
Until v0.128, every Codex CLI interaction followed the same cadence: prompt, execute, wait for the next prompt.
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.