retro: compound-learning 30-day retrospective + 2 new patterns

New patterns:
- PAT-008: Ansible default_ipv6 fact missing on fresh VMs
- PAT-009: Stale NBD devices after RBD volume swap

Updated:
- index.md: added PAT-008, PAT-009
- log.md: retrospective entry with 4 solution docs + 2 patterns
- Solution docs dispatched to ~/docs/solutions/
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Dominik Schön
2026-08-30 11:56:47 +00:00
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# Memory Log
## [2026-08-30] retro | Compound Learning Retrospective (Last 30 Days)
- Reviewed sessions from Jul 31 Aug 30, 2026
- **4 new solution docs** written by subagents:
- `bug-fixes/2026-08-05-ceph-squid-ec-pool-mark-complete-bug.md` — EC pool mark-complete fails in Squid
- `bug-fixes/2026-08-06-traefik-cross-namespace-routing-pitfall.md` — Two Traefik 404 incidents
- `architecture/2026-08-01-k8s-full-cluster-rebuild-procedure.md` — Full RKE2 rebuild sequence
- `architecture/2026-08-01-immich-data-loss-no-backup.md` — Ceph redundancy ≠ backup
- **2 new patterns** extracted:
- PAT-008: Ansible default_ipv6 fact missing on fresh VMs
- PAT-009: Stale NBD devices after RBD volume swap
- **4 Hindsight entries** indexed with solution summaries
- Key themes: K8s cluster disaster recovery, Ceph EC pool unrecoverability, Traefik routing complexity, backup gap identification
## [2026-08-30] feat | WikiSkill Patterns Directory + Skill-Impact Tracker
- Analysed arXiv:2608.27454 (WikiSkill: Compiling Agent Experience into Persistent Knowledge for Skill Evolution)
- **New `patterns/` directory** in LLM Wiki — structured failure-mode patterns inspired by WikiSkill's Wiki Layer