Claude Code deletes session transcripts after 30 days by default — one config line keeps them
Kyrannio · x · 2026-11-10
Dev Migel Tissera warns Claude Code users: sessions are deleted after 30 days by default, which silently destroys transcripts you might want for fine-tuning. Fix: add "cleanupPeriodDays": 36500 to /.claude/settings.json. He learned this the hard way.
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