Codex Knowledge Base
The Reasoning Trap: Why Higher Reasoning Effort Increases Tool Hallucination and How to Defend Your Codex CLI Workflows
A paper presented at ICLR 2026 in Rio de Janeiro this week — The Reasoning Trap: How Enhancing LLM Reasoning Amplifies Tool Hallucination.
The Nine-Second Database Deletion: What the PocketOS Incident Teaches Codex CLI Practitioners About Agent Safety
On 25 April 2026, a Cursor agent powered by Claude Opus 4.6 deleted PocketOS's production database — and every volume-level backup.
Interaction Smells in Codex CLI Sessions: Recognising and Fixing Multi-Turn Prompt Anti-Patterns
Every senior developer knows about code smells — structural patterns that hint at deeper problems. A March 2026 empirical study from Zhang et al. introduces.
GPT-5.2-Codex: What the New Agentic Coding Model Means for Your Codex CLI Workflows
On 28 April 2026, OpenAI released GPT-5.2-Codex — a variant of GPT-5.2 purpose-built for agentic coding workflows . Unlike GPT-5.5, which targets breadth.
GitHub Copilot's Usage-Based Billing Shift: What It Means for Codex CLI Teams
On 27 April 2026, GitHub announced that every Copilot plan will move from premium request units to usage-based billing with GitHub AI Credits on 1 June 2026.
The End of Azure Exclusivity: How OpenAI's Multi-Cloud Pivot Changes the Codex CLI Enterprise Deployment Playbook
On 27 April 2026, Microsoft and OpenAI announced an amended partnership agreement that ended Azure's exclusive right to distribute OpenAI products.
The .NET Agent Skills Ecosystem Matures: Aspire MCP, dotnet-artisan, and the Three-Catalogue Strategy for Codex CLI
When this blog last covered .NET and Codex CLI in late March, the story was straightforward.
The Design Space of Coding Agent Harnesses: Seven Architectural Lessons from the Claude Code Analysis That Apply to Codex CLI
A systematic academic analysis of a competitor's source code is rare in the AI tooling world. In April 2026, researchers from VILA-Lab published Dive into.
Codex at Four Million: What Three Weeks of Hypergrowth Reveals About the Agentic Coding Market
On 28 April 2026, the OpenAI-AWS partnership announcement casually confirmed that more than 4 million people now use Codex every week .
Codex CLI for Solo Developers: Maximum Impact from a One-Person Agentic Setup
Most Codex CLI guidance assumes you are part of a team with shared configuration, dedicated budgets, and someone else worrying about rate limits.