Initial commit: VaultMesh Skills collection

Collection of operational skills for VaultMesh infrastructure including:
- backup-sovereign: Backup and recovery operations
- btc-anchor: Bitcoin anchoring
- cloudflare-tunnel-manager: Cloudflare tunnel management
- container-registry: Container registry operations
- disaster-recovery: Disaster recovery procedures
- dns-sovereign: DNS management
- eth-anchor: Ethereum anchoring
- gitea-bootstrap: Gitea setup and configuration
- hetzner-bootstrap: Hetzner server provisioning
- merkle-forest: Merkle tree operations
- node-hardening: Node security hardening
- operator-bootstrap: Operator initialization
- proof-verifier: Cryptographic proof verification
- rfc3161-anchor: RFC3161 timestamping
- secrets-vault: Secrets management

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

node-hardening/scripts/20_ssh_plan.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_NAME="$(basename "$0")"
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+SKILL_ROOT="$(dirname "$SCRIPT_DIR")"
+
+: "${OUTPUT_DIR:=$SKILL_ROOT/outputs}"
+: "${TEMPLATE_DIR:=$SKILL_ROOT/templates}"
+
+log_info()  { echo "[INFO]  $(date -Iseconds) $*"; }
+log_warn()  { echo "[WARN]  $(date -Iseconds) $*" >&2; }
+
+render_template() {
+  local tpl="$1"
+  local port="$2"
+  sed "s/{{SSH_PORT}}/$port/g" "$tpl"
+}
+
+main() {
+  mkdir -p "$OUTPUT_DIR"
+  local ssh_port="${SSH_PORT:-22}"
+  log_info "SSH Hardening Plan (no changes applied)"
+  log_info "Target SSH_PORT=$ssh_port"
+
+  if [[ -f /etc/ssh/sshd_config ]]; then
+    log_info "Current /etc/ssh/sshd_config exists"
+  else
+    log_warn "No /etc/ssh/sshd_config found; this host may use a different path"
+  fi
+
+  echo
+  echo "--- Proposed sshd_config (rendered from template) ---"
+  render_template "$TEMPLATE_DIR/sshd_config.tpl" "$ssh_port"
+  echo
+  echo "--- Safety notes ---"
+  echo "- Apply will backup /etc/ssh/sshd_config before writing"
+  echo "- Apply will run 'sshd -t' (syntax check) before reloading"
+  echo "- Apply will refuse unless DRY_RUN=0"
+}
+
+[[ "${BASH_SOURCE[0]}" == "$0" ]] && main "$@"