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Forbid em dashes everywhere; add AGENTS.md with repo rules

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2026-10-10 04:14:18 +02:00
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reports/Retention scheduling adaptation.md
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# Borrow Time Machine's pressure-driven thinning discipline
Leading backup systems agree more than their docs admit: declarative time policy decides what may die, cheap metadata marking runs often, expensive reclamation runs rarely, capacity only forces the issue when the target fills, and local resource politeness comes from static ceilings plus OS deferral rather than true autotuning. For a local Linux file-versioning daemon syncing to WebDAV, that means copying Kopia's built-in maintenance rhythm, Time Machine's pre-backup thinning with padding, WebDAV PROPFIND quota checks, and a systemd slice with conservative defaults — because none of the surveyed tools offers a keep-usage-below-70% knob, and the one system that deletes on full does so without any percentage at all.
Leading backup systems agree more than their docs admit: declarative time policy decides what may die, cheap metadata marking runs often, expensive reclamation runs rarely, capacity only forces the issue when the target fills, and local resource politeness comes from static ceilings plus OS deferral rather than true autotuning. For a local Linux file-versioning daemon syncing to WebDAV, that means copying Kopia's built-in maintenance rhythm, Time Machine's pre-backup thinning with padding, WebDAV PROPFIND quota checks, and a systemd slice with conservative defaults - because none of the surveyed tools offers a keep-usage-below-70% knob, and the one system that deletes on full does so without any percentage at all.
## Cheap marking runs daily while reclamation waits weeks