Unverified50% confidenceFactExact time
Codex builds the instruction chain only once per run, from the project root directory to the startup directory, and rule files below (deeper than) that are excluded.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/19/2026
First Seen
Valid until: 1/17/2027
Sources
Related Entities
Related Claims
UnverifiedEach time Codex starts, it loads the model list once via a configuration file, and natively mixing two sets of models is not possible during runtime72% similarUnverifiedWhen simply opening Codex in a terminal, one cannot see one's own code and file structure.67% similarUnverifiedCreating an AGENTS.md file in the project root directory causes Codex to automatically read and follow its rules on every startup; it is recommended to keep the file under 150 lines.65% similarUnverifiedUnder Codex's default permission settings, it can only access the current directory, and a confirmation pop-up appears when an instruction requires creating files outside the current directory.60% similar
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