domains / families / agent-tooling / codex-1m-context-window-setup

codex-1m-context-window-setup

separate

Configures and verifies an expanded, model-aware context window for OpenAI Codex CLI and Desktop. Use when Codex shows ~258K context, you want 500K or 1M tokens, auto-compaction fires too often, or model_context_window/model_auto_compact_token_limit needs repair. Not for changing the selected model or other Codex settings.

When to use

• Inspect the current limit
• Explain 258K context
• Preview the recommendation
• Configure the context window
• Fix the context window
• Raise the context window
• Confirm a prior setup is still correct
• Verify after an update or model switch

When not to use

• Changing the selected model
• Changing reasoning effort
• Changing service tier
• Changing sandbox settings
• Changing approvals
• Changing plugins
• Changing MCP servers
• Changing browser/computer-use settings

Skill page

Source