#codex-cli

A UC Berkeley and Arena study ran seven models in three coding harnesses. Success barely moved; cost moved up to 5x. All 42 measured rows, with intervals.

A census of free writing skills and prose linters for coding agents. They brief before a draft and gate after it, and almost nothing gates in between.

A census of what eleven coding-agent harnesses isolate by default and by flag: filesystem scope, network egress, process spawning, credential visibility.

What nine AI coding CLIs do before you choose anything: trust prompts, telemetry defaults, and mid-task keystrokes, pinned to sources read on August 24, 2026.

Rung names, counts, defaults and whether reasoning can be switched off, across 18 coding-CLI and model-API surfaces, gaps and unresolved cells included.

JetBrains reports 83% faster, 64% cheaper and 63% fewer tool calls for its refactoring skill. The disclosure is unusually good; the scope is one harness.

Claude Code v2.1.234 hardened the remaining pre-approval NTLM path accesses. Codex CLI 0.148.0 added Bedrock and session forking. What changed for operators.

Codex CLI 0.147.0 imports Cursor-managed skills and syncs imported Claude and Cursor conversations. What is actually portable across agent harnesses now.

Three terminal coding agents, three different bets. How Muse Code, Claude Code and Codex CLI compare on subagents, sandboxing, pricing and published scores.

Hands-on deep dive into OpenAI Codex CLI — config.toml schema, profiles, sandbox modes, MCP integration, agent loops, and the workflows that ship.

Migrate from the legacy TypeScript Codex CLI to the current Rust CLI — config.toml schema, auth surface, profile API, sandbox modes, rollout plan.

2026 benchmark comparison of OpenClaw, Hermes Agent, and Codex CLI. OpenRouter token data, real performance numbers, and the decision matrix.

GPT-5.2-Codex achieves 56.4% SWE-Bench Pro and 64% Terminal-Bench. Learn Codex CLI setup, 400K context workflows, and cybersecurity use cases.