2026-04-25 STRC Vault Split Metrics Drop
Brain note count dropped 1611 → 1210 (-401) overnight on 2026-04-24 → 2026-04-25. Not data loss. The drop is the planned STRC vault separation completing on disk.
What brain-stats.jsonl shows
| Folder | 2026-04-24 | 2026-04-25 | Δ |
|---|---|---|---|
research/ | 116 | 1 | -115 |
notes/ | 853 | 568 | -285 |
sources/ | 261 | 241 | -20 |
_templates/ | 21 | 26 | +5 |
sites/ | 34 | 91 | +57 |
| Total | 1611 | 1210 | -401 |
research/ collapse is the entire ~/Brain/research/strc/ workbench moving to ~/STRC/research/. Most of the notes/ drop is STRC-tagged hypothesis notes, paper distillations, and cross-vault wikilinks rewritten or migrated. sources/ drop is STRC-only papers moving to the dedicated vault’s sources/.
Why this looks like an incident but is not
- Cron observation 7228 flagged “Brain Vault Lost 401 Notes Overnight” — the diff is real, the alarm is wrong.
- The split was planned and announced: see STRC bridge stub and the AGENTS.md
~/STRC/callout. - Public site
wiki.strc.egor.lolsources directly from the new vault — proof the migration is intentional, not corruption. - Daily backup to Forgejo runs at the end of
brain-sync.sh, so a true loss would be recoverable from the previous push.
Lesson for monitors
A single “total notes” gauge is too coarse once vaults split. Going forward:
- Treat large negative deltas as suspicious only when they cross a vault boundary that wasn’t supposed to move.
- The metrics cron should track
~/Brain/and~/STRC/separately (or report both deltas in the same run) so a planned migration nets to zero. - When in doubt, compare against
git log --since=...in the vault — real loss leaves a footprint there too.
Connections
[part-of]STRC[see-also]Brain Vault Dreaming[see-also]Brain Decay Strategy[see-also]Cross-Agent Brain Architecture[applies]Knowledge Management