# Codex

> Hands-on Codex workflows, setup notes, and coding-agent field reports for builders shipping with OpenAI Codex.

Practical Codex guides for AI coding: setup, workflows, limits, and what to do when the agent goes off the rails.

- [Codex Stops at 4 Subagents. Raise multi_agent_v2 Concurrency](https://hqman.me/blog/codex-multi-agent-v2-parallel-subagents.md): Codex defaults to 4 concurrent subagents. This multi_agent_v2 config raises the session cap so you can run dozens in parallel. Start small to avoid 429s.
- [Codex Usage Reset August 30, 2026: Tibo on Longer Limits](https://hqman.me/blog/codex-usage-reset-token-optimization.md): The August 30, 2026 Codex usage reset comes with token fixes from OpenAI. Tibo says the same limits may last 10% to 50% longer.
- [The Story Behind Codex Reset, According to Tibo](https://hqman.me/blog/codex-reset-tibo.md): Tibo Sottiaux says Codex Reset began as usage compensation after broken builds. He still controls the reset button.
- [A Dual-Agent Coding Workflow with Codex and ChatGPT Pro](https://hqman.me/blog/codex-chatgpt-pro-workflow.md): Use Codex as project lead and independent verifier while ChatGPT Pro handles focused engineering tasks through a browser-based collaboration loop.
- [Codex Usage Will Reset Again. OpenAI Found the Drain.](https://hqman.me/blog/codex-usage-reset-rate-limit-fixes.md): OpenAI found several causes behind faster Codex usage drain and plans a full paid-user reset. Builders are already planning what to run next.
- [How to Use DeepSeek Models in Codex](https://hqman.me/blog/deepseek-codex-integration.md): Configure Codex to use DeepSeek models with DeepSeek's official setup script, verify the result, and restore your previous configuration.
- [How I Choose GPT-5.6 Sol, Terra, Luna, and Effort Levels](https://hqman.me/blog/gpt56-model-selection.md): A practical decision guide for choosing a GPT-5.6 model and reasoning effort level based on task difficulty, speed, and iteration cost.
- [Codex Just Shipped Two Features That Matter](https://hqman.me/blog/codex-voice-multi-folder.md): A practical look at ChatGPT Voice and multi-folder projects in Codex, including their workflow benefits, limits, and setup details.
- [Running Kimi K3 Inside Codex](https://hqman.me/blog/kimi-k3-inside-codex.md): A step-by-step setup for running Kimi K3 inside the Codex app through CC Switch, with routing details and model-picker caveats.
- [Codex Is Burning Through Your SSD. Here's How I Stopped It](https://hqman.me/blog/codex-ssd-disk-wear-fix.md): A practical guide to checking Codex's SQLite log writes, blocking the unwanted inserts, and protecting your SSD without deleting conversation history.
- [Codex Can Now Copy Your Actions](https://hqman.me/blog/codex-record-replay.md): Codex Record and Replay watches a Mac workflow once, turns it into an editable Skill, then reruns it with new inputs. macOS only, not in the EU.
- [A Practical Guide to Using /goal in Codex](https://hqman.me/blog/codex-goal-completion-contract.md): Use Codex goals as completion contracts with explicit outcomes, verification, constraints, iteration rules, and safe stop conditions.
- [Codex Is No Longer Just a Coding Tool](https://hqman.me/blog/codex-industry-plugins.md): OpenAI repositioned Codex for knowledge work with role-specific plugins, hosted Sites, and Annotations. Non-developers are growing fastest.
- [Used Codex to figure out what was eating my Mac's storage](https://hqman.me/blog/codex-storage-cleanup.md): A read-only Codex prompt that turned macOS System Data into a prioritized storage map, with 180 GB reclaimable on a 1TB Mac.
- [Let Codex Distill Your Own Workflow](https://hqman.me/blog/codex-self-audit-workflow-community.md): How Codex can review your recent work, find repeated manual workflows, and turn the best ones into reusable skills, agents, or automations.