system_prompts_leaks-asgeirtj/OpenAI/Codex/README.md

Codex — which file is which?

The gpt-<version>.md files are the lean Codex system prompts — the base instructions each model ships with in the Codex client's model cache. codex-full.md is a full runtime capture (everything the Codex harness sends around the lean prompt). Since GPT-5.6 the variants can differ: Sol has its own prompt while Terra and Luna share one.

File	What it is
gpt-5.6.md	GPT-5.6 Terra + Luna system prompt (shared, byte-identical)
gpt-5.6-sol.md	GPT-5.6 Sol system prompt (forked from Terra/Luna, July 2026)
gpt-5.5.md, gpt-5.4.md, gpt-5.4-mini.md, gpt-5.3-codex-spark.md	Lean system prompt for that model
codex-full.md	Full runtime capture (lean prompt + harness additions)
codex-auto-review.md	Hidden automatic approval-review model
personality_*.md	{{ personality }} slot variants (friendly / pragmatic; slot removed in 5.6)
plan_mode.md, computer-use.md, control-chrome.md, control-in-app-browser.md	Mode-specific prompts
codex-desktop-realtime-voice-agent.md	Codex desktop realtime voice agent
old/	Superseded versions