Codex Knowledge Base
Codex CLI for Game Prototyping: From Design Document to Playable Build with Godot, Phaser, and Agent Skills
Game prototyping rewards fast iteration above all else. You need to get a concept on screen, playtest it, throw away what fails, and refine what sticks.
Codex CLI Dynamic Tools: Building Custom Client-Side Tool Handlers via the App-Server Protocol
Every MCP server and built-in skill in Codex CLI runs server-side — the agent invokes it, the sandbox executes it, and results flow back through the turn.
Codex CLI Context Compaction Under GPT-5.5: Diagnosing Failures, Configuring Fallbacks, and Keeping Long Sessions Alive
Since GPT-5.5 became the default model in Codex CLI, a wave of compaction failures has disrupted long-running sessions for practitioners worldwide. GitHub.
Codex CLI as an MCP Server: Multi-Agent Orchestration with the OpenAI Agents SDK
Codex CLI is a capable coding agent in its own right, but its real power emerges when you stop thinking of it as a terminal tool and start treating it...
Codex Android Remote Control: Managing Desktop Agent Sessions from Your Phone
An APK teardown of ChatGPT for Android v1.2026.125, reported by Android Authority on 8 May 2026, reveals an upcoming feature allowing users to remotely.
AutoLoop with Codex CLI: Bounded Optimisation Loops for Measurable Codebase Improvement
Karpathy's autoresearch project — released in March 2026 and now sitting at 21,000+ GitHub stars.
Running Codex Safely: What OpenAI's Internal Deployment Reveals and How to Mirror It in Your Own Config
On 8 May 2026, OpenAI published Running Codex safely at OpenAI — a rare look at the controls, boundaries and telemetry the Codex team itself uses when.
Reviewing Agent Pull Requests: What 23,000 PRs Reveal About Description Accuracy and How to Configure Codex CLI for Trustworthy Contributions
More than one in five code reviews on GitHub now involves an AI coding agent . With Codex CLI recording 90 million installs in a single week and the broader....
Prompting GPT-5.5 in Codex CLI: Outcome-First Instructions, AGENTS.md Patterns, and Reasoning Effort Tuning
GPT-5.5 landed in Codex CLI in late April 2026 as OpenAI's newest frontier model, bringing stronger planning, tool use, and multi-step follow-through.
Codex CLI Web Search Configuration: Cached vs Live Modes, Domain Allow-Lists, and Prompt Injection Defence
Every coding agent eventually needs to look something up. A deprecated API flag, a new framework release, an unfamiliar error code — the model's training.