skills: split f3s into six focused sibling skills (index pattern)

Execute plans/f3s-skill-split-plan.md. Carve the oversized f3s skill into six
f3s-prefixed siblings so each loads on its own triggers, and slim f3s to a hub
(38 reference files -> 10; 119 -> 73 lines):

- f3s-storage       ZFS/zrepl/CARP/NFS-stunnel, nfs-mount-monitor, backups
- f3s-k3s           cluster install, off-LAN access, ingress, etcd, r-node Rex
- f3s-observability Prometheus/Alloy/Loki/Tempo, FreeBSD node_exporter
- f3s-workloads     Immich, Garage, Player, yChat, goprecords/uptimed
- f3s-raspberry-pi  pi0/pi1 NetBSD static site, pi2/pi3 Pi-hole/LAN DNS
- f3s-dtail         dserver deployment/ops (SSH 2222)

f3s hub keeps the master Host-IP table, physical hosts, bhyve, WireGuard mesh,
and off-LAN access as the canonical inward-pointing context, plus a Related
skills block. Applies skill-maintenance best practices: fixes the three inlined
SKILL.md duplications (Pi/webserver, DTail) by moving prose to one canonical home
and keeping each new SKILL.md a slim index that points to its references rather
than re-inlining them. All cross-skill links rewritten to ../../<skill>/references/
form (incl. inbound links from pkgrepo and rocky-vm-setup, and two pre-existing
broken links); verified all 112 relative links resolve.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

1 files changed, 0 insertions, 29 deletions

diff --git a/prompts/skills/f3s/references/storage.md b/prompts/skills/f3s/references/storage.md
deleted file mode 100644
index d6c31b0..0000000
--- a/prompts/skills/f3s/references/storage.md
+++ /dev/null
@@ -1,29 +0,0 @@
-# Storage
-
-Persistent storage for k3s is served via **NFS over stunnel** from the FreeBSD hosts, backed by **ZFS** (`zdata` pool) with **CARP** for high availability and **zrepl** for continuous replication.
-
-Note: original plan was HAST, replaced by **zrepl** (ZFS send/receive) — more reliable, avoids the ZFS corruption during failover that HAST caused.
-
-## Sub-references
-
-- [ZFS Pools & Encryption](storage/zfs.md) — `zdata` pool, physical disks, USB-stored keys mounted by `f3skeys` (not `/etc/fstab`), encrypted datasets, boot-time key loading
-- [USB Key Mounting](storage/usb-keys.md) — `f3skeys`, `/usr/local/sbin/f3s-mount-keys`, and current `zfskeys_datasets` per f-host
-- [zrepl Replication](storage/zrepl.md) — `f0 → f1` nfsdata, `f3 → f2` freebsd VM, sink configs, troubleshooting, DL-state recovery
-- [CARP HA VIP](storage/carp.md) — VIP `192.168.1.138`, `carpcontrol.sh`, mgmt script, auto-failback, SUSPENDED-pool limitation
-- [NFS over stunnel](storage/nfs.md) — NFS server, mutual-TLS stunnel, Rocky client config, `/etc/fstab`
-- [nfs-mount-monitor](storage/nfs-mount-monitor.md) — systemd watchdog on r-nodes (mount/stat/write probes, fail counter, cordon-and-reboot escalation)
-- [Troubleshooting](storage/troubleshooting.md) — NFS issues, ZFS pool SUSPENDED recovery, **thermal** troubleshooting (Beelink S12 Pro)
-- [Backups & Local-Path](storage/backups.md) — S3 Glacier Deep Archive, when to use `local-path` instead of NFS
-
-## Storage Summary
-
-| Layer | Technology | Role |
-|-------|-----------|------|
-| Block | M.2+2.5" SSD (f0/f1) | Physical storage |
-| Filesystem | ZFS (`zdata/enc`) | Data integrity, AES-256-GCM encryption |
-| Replication | `zrepl` | Continuous ZFS replication f0→f1 (1min NFS, 10min VM) |
-| HA | CARP VIP 192.168.1.138 | Automatic failover for NFS/stunnel |
-| Network | NFS over stunnel | Encrypted shared storage, mutual TLS auth |
-| Local-path | k3s local-path provisioner | Node-local storage for SQLite/cache workloads |
-| LAN access | FreeBSD relayd on CARP VIP | TCP forwarding to k3s :80/:443 |
-| Backup | S3 Glacier Deep Archive | Off-site encrypted backup |