diff --git a/Makefile b/Makefile
index 5913288..0e25953 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 # =============================================================================
-# Knowledge Genome - Makefile v. 1.4.0
+# Knowledge Genome - Makefile v. 1.5.0
 # Orchestrates the setup and management of the knowledge base.
 # =============================================================================
 
diff --git a/deploy/nexus/README.md b/deploy/nexus/README.md
new file mode 100644
index 0000000..bd8ada0
--- /dev/null
+++ b/deploy/nexus/README.md
@@ -0,0 +1,81 @@
+# Componenti di Sistema — Gestione Sincronizzazione e Automazione Genoma
+
+Questo modulo contiene gli script di backend che vengono installati sul server `nexus` per gestire il ciclo di vita dei vault locali (scratch di lavoro), l'integrazione con Syncthing e l'autocommit dei file grezzi (`raw/`) provenienti dai dispositivi mobili o desktop (es. Obsidian).
+
+## Architettura dei File di Sistema
+
+Gli script sono progettati per girare in un ambiente multi-utente protetto, dove l'istanza globale di `n8n` (tramite l'utente di sistema `n8n-runner`) pilota le operazioni senza possedere i diritti di lettura/scrittura diretti sui file del genoma o sui segreti di configurazione.
+
+### 1. Posizionamento e Permessi degli Script
+
+I file inclusi in questa cartella devono essere installati sul server di produzione nella directory `/usr/local/bin/` con privilegi di esecuzione globali, ma modificabili solo da `root`.
+
+- **Destinazione:** `/usr/local/bin/`
+- **Proprietario (Owner):** `root:root`
+- **Permessi (Chmod):** `0755` (`-rwxr-xr-x`)
+
+#### Elenco degli Script:
+
+- `ensure-genome-vault`: Script idempotente che inizializza o riallinea il vault locale clonandolo da Forgejo (in loopback) sul branch `develop`, configura gli `.stignore` ed effettua il provisioning automatico della cartella condivisa su Syncthing via API.
+- `genome-askpass`: Helper di autenticazione per Git (`GIT_ASKPASS`). Intercetta le richieste di credenziali di Git durante i cloni e i push HTTP su Forgejo, iniettando l'utente e il token applicativo senza esporli nei log di sistema o negli argomenti dei processi.
+- `genome-raw-commit`: Script di polling periodico invocato da n8n. Isola i file modificati nella cartella `raw/`, interroga Syncthing per capire quale dispositivo (e quindi quale autore umano) ha generato la modifica, crea commit atomici attribuiti al singolo autore e pusha le modifiche su Forgejo (`develop`).
+
+---
+
+## Modello di Sicurezza e Visibilità
+
+Per garantire l'isolamento del sistema operativo, l'infrastruttura si basa su tre livelli di confinamento:
+
+### A. Variabili d'Ambiente Protette (`.env`)
+
+Le credenziali (Token Forgejo, API Key Syncthing) risiedono nella Home dell'utente operativo del servizio (`homelab`) e sono completamente invisibili a n8n e ad altri utenti del sistema.
+
+- **Path:** `/home/homelab/.config/knowledge-genome.env`
+- **Permessi:** `0600` (`-rw-------`), di proprietà esclusiva di `homelab:homelab`.
+
+#### env
+
+Nella cartella `~/.config/knowledge-genome.env`.
+
+```text
+# knowledge-genome.env Configuration Profile
+# Requirements: Must be owned by the service user with 0600 permissions.
+
+# Vault path and operational branch
+GENOME_VAULTS_ROOT=/srv/genome-vaults
+GENOME_BASE=develop
+
+# Forgejo Target Instance
+# Replace 127.0.0.1 with vm101 IP if Forgejo is hosted on the virtual machine
+FORGEJO_HOST=127.0.0.1:3001
+FORGEJO_OWNER=Keru
+FORGEJO_USER=n8n-bot
+FORGEJO_TOKEN="............"
+
+# Git Commit Identity
+COMMITTER_NAME=n8n-bot
+COMMITTER_EMAIL=n8n-bot@homelab
+DEFAULT_AUTHOR_NAME="Matteo Cherubini"
+DEFAULT_AUTHOR_EMAIL=matteo@keruhomelab.com
+
+# Syncthing Target Instance
+# Replace 127.0.0.1 with vm101 IP if Syncthing API is hosted on the virtual machine
+SYNCTHING_URL=http://127.0.0.1:8384
+SYNCTHING_API_KEY="............"
+```
+
+### B. Confine dei Privilegi in Sudoers
+
+L'utente di automazione `n8n-runner` (usato dall'agente SSH di n8n) non ha accesso alla shell e non può invocare comandi arbitrari. Può unicamente chiamare i due script principali impersonando l'utente `homelab` senza l'inserimento della password.
+
+Configurazione da applicare in `/etc/sudoers.d/n8n-genome` (con permessi rigorosi `0440`):
+
+```text
+n8n-runner ALL=(homelab) NOPASSWD: /usr/local/bin/ensure-genome-vault, /usr/local/bin/genome-raw-commit
+```
+
+### C. Directory dei Vault
+
+I dati veri e propri sincronizzati da Syncthing risiedono isolati in `/srv/genome-vaults/`.
+
+- **Proprietario**: homelab:homelab (UID/GID 1000), permettendo la convivenza nativa e fluida tra il demone Syncthing in esecuzione nel container e gli script Git locali.
diff --git a/deploy/nexus/ensure-genome-vault.sh b/deploy/nexus/ensure-genome-vault.sh
new file mode 100644
index 0000000..42ed105
--- /dev/null
+++ b/deploy/nexus/ensure-genome-vault.sh
@@ -0,0 +1,118 @@
+#!/bin/bash
+# ensure-genome-vault <genome> [--status-only]
+#
+# Idempotent, unified command for managing genome vaults.
+# Called by n8n during genome creation and as a safety net mechanism.
+#
+# Operation workflow:
+#   - Vault absent  -> Clone from Forgejo (loopback) + track develop branch
+#   - Vault present -> Realign to origin/develop (treated as a rebuildable scratchpad)
+#   - Post-clone/fetch -> Write raw/.stignore and register/update the Syncthing folder.
+#
+# Source of truth is Forgejo. Vaults are scratch spaces and not backed up directly.
+# All operations run locally via loopback.
+
+set -euo pipefail
+genome="${1:?usage: ensure-genome-vault <genome> [--status-only]}"
+mode="${2:-}"
+
+# Slug validation inside the script to prevent path/URL traversal:
+# Lowercase kebab-case, no '/', '..', or spaces.
+[[ "$genome" =~ ^[a-z0-9][a-z0-9-]{0,63}$ ]] || { echo '{"status":"error","reason":"invalid genome name"}'; exit 1; }
+
+set -a; . "${HOME}/.config/knowledge-genome.env"; set +a
+: "${GENOME_VAULTS_ROOT:=/srv/genome-vaults}"
+: "${GENOME_BASE:=develop}"
+: "${FORGEJO_USER:=n8n-bot}"
+: "${FORGEJO_HOST:=127.0.0.1:3001}"
+: "${FORGEJO_OWNER:=Keru}"
+: "${SYNCTHING_URL:=http://127.0.0.1:8384}"
+
+vault="${GENOME_VAULTS_ROOT}/${genome}"
+fid="${genome}-public"
+clone_url="http://${FORGEJO_USER}@${FORGEJO_HOST}/${FORGEJO_OWNER}/${genome}.git"
+export GIT_ASKPASS=/usr/local/bin/genome-askpass   # Provides the n8n-bot token
+
+mkdir -p "$GENOME_VAULTS_ROOT"
+
+# ── 1. Clone (if missing) or realign (if present) ────────────────────────────
+if [[ ! -d "${vault}/.git" ]]; then
+  [[ "$mode" == "--status-only" ]] && { printf '{"status":"absent","genome":"%s"}\n' "$genome"; exit 0; }
+  git clone -q "$clone_url" "$vault"
+  cd "$vault"
+  if git show-ref --verify --quiet "refs/remotes/origin/${GENOME_BASE}"; then
+    git switch -q -c "$GENOME_BASE" --track "origin/${GENOME_BASE}" 2>/dev/null || git switch -q "$GENOME_BASE"
+  else
+    # develop does not exist on remote yet: create it from current base and publish
+    git switch -q -c "$GENOME_BASE"
+    git push -q "$clone_url" "${GENOME_BASE}:${GENOME_BASE}"
+  fi
+  state="cloned"
+else
+  cd "$vault"
+  if [[ "$mode" == "--status-only" ]]; then
+    printf '{"status":"present","genome":"%s","head":"%s"}\n' "$genome" "$(git rev-parse --short HEAD)"
+    exit 0
+  fi
+  git fetch -q origin
+  if git show-ref --verify --quiet "refs/remotes/origin/${GENOME_BASE}"; then
+    git switch -q "$GENOME_BASE" 2>/dev/null || git switch -q -c "$GENOME_BASE" --track "origin/${GENOME_BASE}"
+    # GUARD: hard reset is allowed ONLY if the working tree is clean.
+    # If Syncthing has already written uncommitted raw files, DO NOT destroy them: soft fast-forward.
+    if [[ -z "$(git status --porcelain -- raw/ 2>/dev/null)" ]]; then
+      git reset -q --hard "origin/${GENOME_BASE}"
+      state="realigned"
+    else
+      git merge -q --ff-only "origin/${GENOME_BASE}" 2>/dev/null || true
+      state="realigned-kept-dirty"
+    fi
+  else
+    git switch -q -c "$GENOME_BASE" 2>/dev/null || true
+    git push -q "$clone_url" "${GENOME_BASE}:${GENOME_BASE}"
+    state="base-created"
+  fi
+fi
+
+# ── 2. raw/.stignore + exclusion from git (infrastructure, not content) ────────────
+mkdir -p "${vault}/raw"
+cat > "${vault}/raw/.stignore" <<'EOF'
+// Knowledge Genome — Syncthing exclusions for raw/
+// NEVER unencrypted private data: git-crypt protects INSIDE the repo, not in Syncthing transit
+private
+// Obsidian / editor noise
+.obsidian
+.trash
+*.tmp
+workspace*.json
+// security
+.git
+EOF
+# .stignore must not be included in genome commits
+grep -qxF 'raw/.stignore' "${vault}/.git/info/exclude" 2>/dev/null \
+  || echo 'raw/.stignore' >> "${vault}/.git/info/exclude"
+
+# ── 3. Idempotent Syncthing folder configuration (best-effort, does not block the vault) ────────
+folder_state="skipped(no api key)"
+if [[ -n "${SYNCTHING_API_KEY:-}" ]]; then
+  if curl -fsS -o /dev/null -H "X-API-Key: ${SYNCTHING_API_KEY}" \
+       "${SYNCTHING_URL}/rest/config/folders/${fid}" 2>/dev/null; then
+    folder_state="exists"
+  else
+    body="$(curl -fsS -H "X-API-Key: ${SYNCTHING_API_KEY}" \
+              "${SYNCTHING_URL}/rest/config/defaults/folder" \
+            | jq --arg id "$fid" --arg label "${genome} (raw public)" --arg path "${vault}/raw" \
+                 '.id=$id | .label=$label | .path=$path | .type="sendreceive"
+                  | .fsWatcherEnabled=true | .rescanIntervalS=3600')"
+
+    if curl -fsS -o /dev/null -X PUT \
+         -H "X-API-Key: ${SYNCTHING_API_KEY}" -H "Content-Type: application/json" \
+         -d "$body" "${SYNCTHING_URL}/rest/config/folders/${fid}" 2>/dev/null; then
+      folder_state="created"
+    else
+      folder_state="error(check syncthing api)"
+    fi
+  fi
+fi
+
+printf '{"status":"ok","genome":"%s","vault":"%s","state":"%s","syncthing_folder":"%s"}\n' \
+  "$genome" "$vault" "$state" "$folder_state"
diff --git a/deploy/nexus/genome-askpass.sh b/deploy/nexus/genome-askpass.sh
new file mode 100644
index 0000000..104b3b7
--- /dev/null
+++ b/deploy/nexus/genome-askpass.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+#
+# GIT_ASKPASS helper for Forgejo HTTP authentication.
+# Git invokes this script when it needs a username or password.
+#
+
+set -eu
+
+# Load environment variables
+. "${HOME}/.config/knowledge-genome.env"
+
+case "${1:-}" in
+  *[Uu]sername*)
+    printf '%s\n' "${FORGEJO_USER:-n8n-bot}"
+    ;;
+  *)
+    printf '%s\n' "${FORGEJO_TOKEN:?FORGEJO_TOKEN not set}"
+    ;;
+esac
diff --git a/deploy/nexus/genome-raw-commit.sh b/deploy/nexus/genome-raw-commit.sh
new file mode 100644
index 0000000..3989346
--- /dev/null
+++ b/deploy/nexus/genome-raw-commit.sh
@@ -0,0 +1,101 @@
+#!/bin/bash
+# genome-raw-commit <genome>
+#
+# Commits raw files synchronized by Syncthing into the vault and pushes them to origin/<base>.
+#   - Committer = n8n-bot (robotic identity responsible for pushing)
+#   - Author    = deduced from the Syncthing device ID (modifiedBy field), resolved via .authors.json.
+#                 Falls back to default values if unknown.
+#   - One commit per author/device to ensure clear attribution.
+#   - No-op if no changes are present. Excludes infrastructure files and private folders.
+
+set -euo pipefail
+genome="${1:?usage: genome-raw-commit <genome>}"
+
+# Input validation to prevent path or URL traversal inside the script
+[[ "$genome" =~ ^[a-z0-9][a-z0-9-]{0,63}$ ]] || { echo '{"status":"error","reason":"invalid genome name"}'; exit 1; }
+
+set -a; . "${HOME}/.config/knowledge-genome.env"; set +a
+: "${GENOME_VAULTS_ROOT:=/srv/genome-vaults}"
+: "${GENOME_BASE:=develop}"
+: "${FORGEJO_USER:=n8n-bot}"
+: "${FORGEJO_HOST:=127.0.0.1:3001}"
+: "${FORGEJO_OWNER:=Keru}"
+: "${SYNCTHING_URL:=http://127.0.0.1:8384}"
+: "${COMMITTER_NAME:=n8n-bot}"
+: "${COMMITTER_EMAIL:=n8n-bot@homelab}"
+: "${DEFAULT_AUTHOR_NAME:=Unknown}"
+: "${DEFAULT_AUTHOR_EMAIL:=unknown@syncthing}"
+
+vault="${GENOME_VAULTS_ROOT}/${genome}"
+fid="${genome}-public"
+authors_map="${GENOME_VAULTS_ROOT}/.authors.json"
+clone_url="http://${FORGEJO_USER}@${FORGEJO_HOST}/${FORGEJO_OWNER}/${genome}.git"
+export GIT_ASKPASS=/usr/local/bin/genome-askpass
+
+[[ -d "${vault}/.git" ]] || { printf '{"status":"error","reason":"vault absent","genome":"%s"}\n' "$genome"; exit 1; }
+cd "$vault"
+git config user.name  "$COMMITTER_NAME"
+git config user.email "$COMMITTER_EMAIL"
+git config commit.gpgsign false
+
+# Scope restricted to raw/ directory. raw/.stignore is omitted via .git/info/exclude
+git add -A -- raw/
+git reset -q -- raw/.stignore 2>/dev/null || true
+
+if git diff --cached --quiet; then
+  printf '{"status":"noop","genome":"%s"}\n' "$genome"
+  exit 0
+fi
+
+# Map Syncthing device ID to author information (name, email)
+resolve_dev() {
+  # $1 = file path relative to the vault root (e.g., raw/file.txt)
+  [[ -z "${SYNCTHING_API_KEY:-}" ]] && return 0
+  curl -fsS -H "X-API-Key: ${SYNCTHING_API_KEY}" --get "${SYNCTHING_URL}/rest/db/file" \
+    --data-urlencode "folder=${fid}" --data-urlencode "file=${1#raw/}" 2>/dev/null \
+    | jq -r '.local.modifiedBy // empty' 2>/dev/null || true
+}
+
+author_for_dev() {
+  # $1 = device ID
+  local dev="$1" name="$DEFAULT_AUTHOR_NAME" email="$DEFAULT_AUTHOR_EMAIL"
+  if [[ -n "$dev" && -f "$authors_map" ]] && jq -e --arg d "$dev" '.[$d]' "$authors_map" >/dev/null 2>&1; then
+    name="$(jq -r --arg d "$dev" '.[$d].name'  "$authors_map")"
+    email="$(jq -r --arg d "$dev" '.[$d].email' "$authors_map")"
+  fi
+  printf '%s\t%s\t%s' "$name" "$email" "${dev:-unknown}"
+}
+
+# Group staged files by author identity
+declare -A G_FILES G_NAME G_EMAIL G_DEV
+while IFS= read -r f; do
+  [[ -z "$f" ]] && continue
+  dev="$(resolve_dev "$f")"
+  IFS=$'\t' read -r aname aemail adev <<< "$(author_for_dev "$dev")"
+  key="${aname} <${aemail}>"
+  G_FILES["$key"]+="${f}"$'\n'
+  G_NAME["$key"]="$aname"; G_EMAIL["$key"]="$aemail"; G_DEV["$key"]="$adev"
+done < <(git diff --cached --name-only -- raw/)
+
+ts="$(date +%Y-%m-%dT%H:%M:%S%z)"
+commits=0; summary=""
+for key in "${!G_FILES[@]}"; do
+  mapfile -t files < <(printf '%s' "${G_FILES[$key]}")
+  short="$(printf '%s\n' "${files[@]}" | sed 's#^raw/##' | paste -sd, -)"
+  msg="$(printf 'raw(%s): sync %s\n\nAdded-by-device: %s\nSyncthing-device-id: %s\nSource: syncthing-autocommit\nSynced-at: %s\n' \
+        "$genome" "$short" "${G_DEV[$key]}" "${G_DEV[$key]}" "$ts")"
+  git commit -q --author="$key" -m "$msg" -- "${files[@]}"
+  commits=$((commits+1))
+  summary="${summary}${summary:+; }${G_NAME[$key]}:${short}"
+done
+
+# Fetch updates from origin to merge upstream modifications before pushing
+git fetch -q origin
+if git show-ref --verify --quiet "refs/remotes/origin/${GENOME_BASE}"; then
+  git rebase -q "origin/${GENOME_BASE}" \
+    || { git rebase --abort 2>/dev/null || true; printf '{"status":"error","reason":"rebase-conflict","genome":"%s"}\n' "$genome"; exit 1; }
+fi
+git push -q "$clone_url" "HEAD:${GENOME_BASE}"
+
+printf '{"status":"ok","genome":"%s","base":"%s","commits":%d","head":"%s","summary":"%s"}\n' \
+  "$genome" "$GENOME_BASE" $commits "$(git rev-parse --short HEAD)" "$summary"