chore(skills): promote runbook skills to managed-skills; drop superseded SKILL.md

- 31 new managed skills (anubis/arr/authentik/hermes/freetoken/podman/llm-swap
  runbooks etc.) now tracked.
- Removed superseded skills: omp_harness_config, peon_ping_integration
  (replaced by user-authored peon-ping-* managed skills),
  rocmfp4-strix-benchmark-orchestration.
- New memory-root skills: niri_compositor_ops, omp_git_workflow,
  omp_model_config, quadlet-media-migration, homelab-service-triage,
  hermes-dankclaw-ops, frank-default-large-ops, caddy-auth-dns-playbook.

agent/memories/--home-dank-.omp--/skills/omp_git_workflow/SKILL.md

@@ -0,0 +1 @@
+Git operations tailored for OMP environment. Addresses dirty `agent/memories/` tracking pitfalls, implements stash-before-checkout protocol, and standardizes PR creation in dank/command-center.

agent/memories/--home-dank-.omp--/skills/omp_git_workflow/scripts/scripts/prepare_checkout.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+# Safely checkout main in OMP
+if [ -n "$(git status -s agent/memories/)" ]; then
+  git stash
+  echo "Stashed dirty agent/memories/ files."
+fi
+git checkout main
+git pull origin main

agent/memories/--home-dank-.omp--/skills/omp_git_workflow/templates/templates/pr_branch.md

@@ -0,0 +1,5 @@
+# PR Branch Convention
+- Branch: pr/fix-models
+- Target: main
+- Strategy: Single commit, clean history
+- Workflow: Feature -> PR -> Squash/Merge