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Codex CLI Resumed Sessions Exhaust 731GiB of Disk Due to Subagent Log Explosion

·2026.07.20 21:22

Key point

A problem has been reported where Subagent logs abnormally accumulate in resumed long-running Codex CLI sessions, exhausting disk space.

Details

A problem has been reported where, during repeated Subagent creation in resumed long-running Codex CLI sessions, JSONL session files in the ~/.codex/sessions directory grow abnormally.

In a disclosed case, a single resumed parent session generated 2,393 Subagent session files, which were found to occupy approximately 731.5GiB of storage.

openaicodex-clisession-logsubagentsbug-reportdisk-usage
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