tech 34db3dc439 docs: add design spec for backup --days parameter ...

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

2026-04-21 22:16:24 +08:00

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2026-04-21-backup-days-param-design.md

docs: add design spec for backup --days parameter

2026-04-21 22:16:24 +08:00

2026-04-21-order-bak-design.md

initial: project docs and design spec

2026-04-21 14:51:56 +08:00