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-# NX9 WireGuard (`nx9-wg`) — Full Technical Architecture & Stack Report
-
-![Rust](https://img.shields.io/badge/Rust-Stable-orange)
-![SQLite](https://img.shields.io/badge/SQLite-Embedded-blue)
-![Platform](https://img.shields.io/badge/Platform-Linux-lightgrey)
-![License](https://img.shields.io/badge/License-MIT%20OR%20Apache--2.0-green)
-![Version](https://img.shields.io/badge/Version-v1.0.0-purple)
-![Ecosystem](https://img.shields.io/badge/NX9-Ecosystem-6d5df6)
-
-> **"Software people can own, understand, and control."**
-> — [NX9 Systems (https://nx9.in)](https://nx9.in)
-
----
-
-## 📑 Table of Contents
-
-1. [Executive Summary](#1-executive-summary)
-2. [The NX9 Philosophy in Implementation](#2-the-nx9-philosophy-in-implementation)
-3. [The Architectural Paradigm Shift](#3-the-architectural-paradigm-shift)
-4. [Six-Crate Workspace Architecture](#4-six-crate-workspace-architecture)
-5. [Complete Capability Inventory](#5-complete-capability-inventory)
-6. [Native Linux Execution Planes](#6-native-linux-execution-planes)
-7. [Closed-Loop Reconciliation & Convergence](#7-closed-loop-reconciliation--convergence)
-8. [Embedded Single Page Application (SPA) & WebSockets](#8-embedded-single-page-application-spa--websockets)
-9. [REST API & WebSocket Protocol Reference](#9-rest-api--websocket-protocol-reference)
-10. [Native CLI Command System](#10-native-cli-command-system)
-11. [Security Model & Capability Isolation](#11-security-model--capability-isolation)
-12. [Disaster Recovery, Backups & Upgrades](#12-disaster-recovery-backups--upgrades)
-13. [Release Engineering & Deployment Lifecycle](#13-release-engineering--deployment-lifecycle)
-14. [Quality Assurance & Verification Evidence](#14-quality-assurance--verification-evidence)
-15. [Ecosystem & License Summary](#15-ecosystem--license-summary)
-
----
-
-## 1. Executive Summary
-
-`nx9-wg` is a sovereign, self-hosted, Linux-native VPN and network control plane built directly around the Linux kernel's in-tree WireGuard implementation (`wireguard.ko`).
-
-Rather than functioning as a fragile user interface wrapper that shells out to external command-line utilities (`wg`, `ip`, `nft`, `sysctl`), `nx9-wg` establishes an integrated, single-binary architecture. It combines **authoritative SQLite desired-state persistence**, **direct kernel Netlink execution** (RTNETLINK and WireGuard Generic Netlink), **in-process Netfilter firewall/NAT compilation** (`libnftables.so.1`), **continuous closed-loop reconciliation**, a **multi-format native CLI**, and an **embedded zero-dependency Single Page Application (SPA) Web UI**.
-
----
-
-## 2. The NX9 Philosophy in Implementation
-
-Every design and architectural choice in `nx9-wg` directly reflects the core philosophy of the **NX9 Ecosystem** ([https://nx9.in](https://nx9.in)):
-
-| NX9 Principle | Core Intent | `nx9-wg` Implementation |
-| :--- | :--- | :--- |
-| 🔑 **Operator Ownership** | Full control over binaries, configurations, databases, keys, and backups with zero dependency on cloud-hosted control planes. | 100% local operation. Private keys, configuration data, and encryption parameters never leave the operator's host. |
-| 🖥️ **Self-Hosting First** | Built to be deployed and operated effortlessly by a single administrator without requiring Kubernetes or external infrastructure. | Self-contained single executable. Bootstrapped with a single command (`nx9-wg init`), running seamlessly under standard systemd. |
-| ⚡ **Simplicity Over Complexity** | One binary, one configuration file, one SQLite database, one administrator. | No multi-daemon orchestration, no external message queues, no Node.js runtime, no Python scripts, and zero shell wrappers. |
-| 🛡️ **Privacy by Default** | Zero analytics, zero telemetry collection, zero third-party tracking, and zero assumptions of external cloud connectivity. | No phone-home telemetry. Completely air-gapped capable with all static assets, fonts, and scripts embedded in the binary. |
-| 🔒 **Security by Design** | Modern cryptography, strict invariants, and append-only audit logging embedded from day one. | Argon2id password hashing, SHA-256 token digests, X25519 key generation, single-admin database constraint (`CHECK (id=1)`), and strict secret redaction. |
-| 🔧 **Operational Excellence** | Diagnostics, backup/restore, migration tools, CLI management, and comprehensive documentation built-in. | Multi-subsystem automated health inspections, atomic online SQLite `VACUUM INTO` snapshots with SHA-256 manifests, and 100% CLI parity. |
-| ⏳ **Long-Term Stability** | Avoid dependency churn. Build software that remains understandable and maintainable years into the future. | Built in stable native Rust (Edition 2024), standard SQLite 3 storage, standard TOML configuration, and POSIX-compliant systemd integration. |
-| 🌐 **Open Source First** | 100% free and open-source software under permissive licensing. | Dual-licensed under `MIT OR Apache-2.0`. Complete freedom to inspect, audit, build, and extend. |
-| ♾️ **Zero Vendor Lock-In** | Standard data formats, open protocols, and zero proprietary cloud lock-in. | Standard SQLite database, standard WireGuard `.conf` files, standard RFC-compliant JSON/YAML/CSV output formats, and open Netlink sockets. |
-
----
-
-## 3. The Architectural Paradigm Shift
-
-### Typical WireGuard Management Wrappers
-```
-┌──────────┐     ┌──────────────────────┐     ┌────────────────────────────┐     ┌──────────────┐
-│  Web UI  │ ──► │  Text Config Files   │ ──► │  wg / ip / nft / sysctl    │ ──► │ Linux Kernel │
-│ (Node/Py)│     │(/etc/wireguard/*.conf│     │ (Subprocess Spawning)      │     │ (wireguard.ko│
-└──────────┘     └──────────────────────┘     └────────────────────────────┘     └──────────────┘
-```
-*Disadvantages: Fragile process spawning, race conditions, lack of atomic state, broken host routing, vulnerability to configuration drift, and heavy runtime dependency footprints.*
-
-### Whereas `nx9-wg` is a Native Control & Execution Plane:
-```
-                                ┌───────────────────────────────────┐
-                                │             nx9-wg                │
-                                └─────────────────┬─────────────────┘
-                                                  │
-                 ┌────────────────────────────────┴────────────────────────────────┐
-                 │                                                                 │
-       ┌─────────▼─────────┐                                             ┌─────────▼─────────┐
-       │   Desired State   │                                             │    Live State     │
-       │  (Authoritative)  │                                             │  (Kernel Cache)   │
-       └─────────┬─────────┘                                             └─────────▲─────────┘
-                 │                                                                 │
-       ┌─────────▼─────────┐                                             ┌─────────┴─────────┐
-       │  SQLite 3 (WAL)   │                                             │   Linux Kernel    │
-       └─────────┬─────────┘                                             └─────────▲─────────┘
-                 │                                                                 │
-                 │                                                       Live Netlink Telemetry
-                 ▼                                                                 │
-       ┌───────────────────┐                                                       │
-       │   Reconciliation  │ ◄─────────────────────────────────────────────────────┘
-       │      Engine       │
-       └─────────┬─────────┘
-                 │
-                 ├── 🔐 WireGuard Generic Netlink (family "wireguard")
-                 ├── 🌐 RTNETLINK (Links, IPv4/IPv6 Addresses, Routes)
-                 ├── 🔥 Netfilter / libnftables FFI (table inet nx9_wg)
-                 └── ↔️ Direct Procfs IP Forwarding (/proc/sys/net)
-                 │
-                 ▼
-       ┌───────────────────┐
-       │  Linux Networking │
-       └───────────────────┘
-```
-
----
-
-## 4. Six-Crate Workspace Architecture
-
-`nx9-wg` is architected as a modular six-crate Cargo workspace ensuring clean separation of concerns, zero circular dependencies, and isolated testability:
-
-```
-nx9-wg (Root Executable & Unified Entrypoint)
- ├── 📦 crates/nx9-wg-core     — Domain models, RFC validation, cryptography, configuration
- ├── 📦 crates/nx9-wg-db       — SQLite storage engine, migration framework, repositories
- ├── 📦 crates/nx9-wireguard   — WireGuard Generic Netlink, RTNETLINK link engine, config & QR
- ├── 📦 crates/nx9-wg-network  — RTNETLINK routes/addresses, libnftables Netfilter, procfs
- ├── 📦 crates/nx9-wg-api      — Axum REST router, WebSockets, auth, reconciliation, IP allocator
- └── 📦 crates/nx9-wg-ui       — Design tokens, CSS compiler, view models, SPA integration
-```
-
----
-
-## 5. Complete Capability Inventory
-
-`nx9-wg` delivers a comprehensive suite of 20 core infrastructure capabilities:
-
-| Icon | Capability | Architectural Description |
-| :---: | :--- | :--- |
-| 🔐 | **WireGuard Interface Lifecycle** | In-process RTNETLINK link creation (`RTM_NEWLINK`), state toggling (`IFF_UP`/`IFF_DOWN`), and WireGuard Generic Netlink cryptokey configuration (`WG_CMD_SET_DEVICE`). |
-| 👥 | **Cryptographic Peer Enrollment** | Dynamic Curve25519 public key management, preshared keys, CIDR allowed IPs, persistent keepalive intervals, and atomic `ReplacePeers` synchronization. |
-| 🌐 | **IPv4 & IPv6 Address Management** | Native Netlink address assignment (`RTM_NEWADDR` / `RTM_DELADDR`) across WireGuard interfaces without invoking `ip addr`. |
-| 🛣️ | **Kernel Route Management** | Routing table synchronization (`RTM_NEWROUTE` / `RTM_DELROUTE`) with strict default gateway protection and multi-tenant non-interference invariants. |
-| 🔥 | **nftables Netfilter Firewall** | In-process rule compilation and transactional application via `libnftables.so.1` confined strictly to `table inet nx9_wg`. |
-| 🛡️ | **Scoped NAT & Masquerading** | Outbound NAT masquerade dynamically calculated and applied strictly to managed WireGuard client subnets, preventing host network disruption. |
-| ↔️ | **Direct Procfs IP Forwarding** | Direct atomic mutation of `/proc/sys/net/ipv4/ip_forward` and `/proc/sys/net/ipv6/conf/all/forwarding` without invoking `sysctl`. |
-| 📡 | **Live Kernel Telemetry** | Real-time extraction of handshake timestamps, rx/tx byte counters, and roaming remote socket endpoints directly from kernel sockets. |
-| 🔄 | **Desired-State Reconciliation** | Continuous closed-loop control cycle bringing the Linux kernel execution plane into alignment with authoritative SQLite storage. |
-| 🧭 | **5-Subsystem Drift Detection** | Deterministic, read-only calculation of state divergence across interfaces, peers, routes, firewall rules, and IP forwarding. |
-| ♻️ | **Cold-Boot Restart Recovery** | Autonomous reconstruction of kernel network topology, routes, and firewall rules upon daemon startup or host reboot. |
-| 🧪 | **Cross-Platform Simulation Engine** | In-memory simulated execution planes enabling full UI and CLI development on macOS and Windows without requiring Linux Netlink. |
-| 🖥️ | **Multi-Format Native CLI** | 100% native CLI coverage across all 17 subcommands supporting `table`, `json`, `yaml`, and `csv` output with script-friendly exit codes. |
-| 🌐 | **Axum REST API & WebSockets** | High-performance asynchronous HTTP server with session/bearer authentication and a real-time WebSocket event broadcaster (`/api/v1/ws`). |
-| 💻 | **Embedded Zero-Dependency SPA** | Modern HTML5/CSS3/Vanilla ES6+ Single Page Application compiled into the binary with Light/Dark theme support and 15 interactive views. |
-| 📊 | **Automated Health Diagnostics** | Built-in inspection across 9 subsystems with structured status reporting, root-cause diagnostics, and actionable remediation hints. |
-| 💾 | **Atomic Disaster Recovery Backups** | Online non-blocking SQLite `VACUUM INTO` snapshots with SHA-256 manifest verification and automatic pre-restore safety checkpoints. |
-| 🔑 | **Single-Administrator Security** | Database-enforced single identity (`CHECK (id=1)`), Argon2id password hashing, SHA-256 API token storage, and brute-force login rate limiting. |
-| 📱 | **Client Profiles & QR Engine** | Provider/device MTU profiles (1280 vs 1360 vs 1420), collision-resistant IP allocation, and pure Rust vector SVG, PNG, and ASCII QR generation. |
-| 📦 | **Production Release Packaging** | Standalone distribution archive generator (`scripts/package-release.sh`), automated installer/uninstaller, and hardened systemd service unit. |
-
----
-
-## 6. Native Linux Execution Planes
-
-`nx9-wg` enforces a **Zero Subprocess Guarantee** across the entire production codebase:
-
-```
-┌────────────────────────────────────────────────────────────────────────────────────────┐
-│                                   Rust Production Binary                               │
-├────────────────────────────┬────────────────────────────┬──────────────────────────────┤
-│ NativeLinuxWireGuardEngine │  NativeLinuxNetworkEngine  │   NativeLinuxNftablesEngine  │
-├────────────────────────────┼────────────────────────────┼──────────────────────────────┤
-│ • AF_NETLINK               │ • NETLINK_ROUTE            │ • In-process libnftables FFI │
-│ • NETLINK_GENERIC (wg)     │ • RTM_NEWLINK / DELLINK    │ • nft_ctx_new()              │
-│ • WG_CMD_SET_DEVICE        │ • RTM_NEWADDR / DELADDR    │ • Atomic Netfilter batch     │
-│ • WG_CMD_GET_DEVICE        │ • RTM_NEWROUTE / DELROUTE  │ • Scoped: table inet nx9_wg  │
-│ • WGDEVICE_F_REPLACE_PEERS │ • Direct /proc/sys writes  │ • Zero host table flushes    │
-└─────────────┬──────────────┴─────────────┬──────────────┴──────────────┬───────────────┘
-              ▼                            ▼                             ▼
-┌────────────────────────────────────────────────────────────────────────────────────────┐
-│                                     Linux Kernel                                       │
-│                (wireguard.ko • RTNETLINK • Netfilter • /proc/sys/net)                  │
-└────────────────────────────────────────────────────────────────────────────────────────┘
-```
-
----
-
-## 7. Closed-Loop Reconciliation & Convergence
-
-Reconciliation is the foundational control loop that bridges authoritative SQLite state with the Linux kernel:
-
-```
-   ┌──────────────────────────────────────────────────────────────────┐
-   │ 1. SQLite Desired State (Authoritative Persistent Source of Truth│
-   └────────────────────────────────┬─────────────────────────────────┘
-                                    │
-                                    ▼
-   ┌──────────────────────────────────────────────────────────────────┐
-   │ 2. Live Kernel Query (WireGuard Genl, RTNL routes, table nx9_wg) │
-   └────────────────────────────────┬─────────────────────────────────┘
-                                    │
-                                    ▼
-   ┌──────────────────────────────────────────────────────────────────┐
-   │ 3. Drift Detection (Read-Only Deterministic Multi-Subsystem Diff)│
-   └────────────────────────────────┬─────────────────────────────────┘
-                                    │
-                    ┌───────────────┴───────────────┐
-                    │ has_drift == false?           │
-                    ├───────────────────────┬───────┤
-                    │ YES                   │ NO    │
-                    ▼                       ▼       │
-             ┌─────────────┐         ┌──────────────▼────────────────┐
-             │  Converged  │         │ 4. Acquire Async Mutex Lock   │
-             │  (In Sync)  │         └──────────────┬────────────────┘
-             └─────────────┘                        │
-                                                    ▼
-                                     ┌───────────────────────────────┐
-                                     │ 5. Execute Native Mutations   │
-                                     │    (Genl SET_DEVICE, RTNL)    │
-                                     └──────────────┬────────────────┘
-                                                    │
-                                                    ▼
-                                     ┌───────────────────────────────┐
-                                     │ 6. Post-Apply Verification    │
-                                     └──────────────┬────────────────┘
-                                                    │
-                                    ┌───────────────┴───────────────┐
-                                    ▼                               ▼
-                             ┌─────────────┐                 ┌─────────────┐
-                             │  Converged  │                 │   Partial   │
-                             │  (100% Sync)│                 │   Failure   │
-                             └─────────────┘                 └─────────────┘
-```
-
-### The Six Reconciliation Lifecycle States
-1. **`Plan`**: Read-only calculation of drift between SQLite and kernel.
-2. **`Applying`**: In-progress dispatch of native mutations across execution planes.
-3. **`Verifying`**: Querying live kernel state to confirm applied changes took effect.
-4. **`Converged`**: 100% synchronization achieved with zero remaining drift.
-5. **`PartialFailure`**: One or more execution planes failed during apply (e.g. permission error).
-6. **`DriftRemains`**: Apply completed without fatal error, but post-verification detected unapplied state.
-
----
-
-## 8. Embedded Single Page Application (SPA) & WebSockets
-
-The `nx9-wg` frontend is a zero-dependency HTML5/CSS/JavaScript SPA embedded directly into the Rust binary:
-
-- **Zero External Toolchains**: No Node.js, npm, Webpack, Vite, React, or external CDN dependencies.
-- **Embedded In-Memory Delivery**: Bundled at compile-time via `include_str!()` and served from memory.
-- **Design Tokens**: Custom CSS token system ([`crates/nx9-wg-ui/src/css.rs`](file:///home/sunil/Programs/nx9-wg/crates/nx9-wg-ui/src/css.rs)) supporting Light and Dark modes.
-- **Real-Time WebSocket Stream**: Subscribes to `ws://<host>/api/v1/ws` for live handshakes and drift alerts without polling.
-- **15 Interactive Views**:
-  1. `#dashboard` — System overview, uptime, interface/peer counts, health cards.
-  2. `#interfaces` — WireGuard interface CRUD, listen port, MTU, state toggles.
-  3. `#peers` — Enrolled peer table, real-time handshakes, profile resolution, `.conf` export, SVG QR modal.
-  4. `#networks` — Subnet network ranges, CIDR masks, available IP inspector.
-  5. `#routes` — Kernel route definitions, gateway assignments, interface scoping.
-  6. `#firewall` — nftables packet filtering rules in `table inet nx9_wg`, priority sorting.
-  7. `#nat` — Managed subnet NAT masquerade status and instant toggle.
-  8. `#forwarding` — Kernel IPv4/IPv6 packet forwarding status and toggle.
-  9. `#reconciliation` — Real-time kernel drift overview, action plan table, interactive Apply button.
-  10. `#diagnostics` — Automated multi-subsystem health checks with remediation hints.
-  11. `#live-state` — Raw Linux Netlink telemetry, active kernel interfaces, live routing table.
-  12. `#settings` — Key-value appliance parameters and danger zone reset controls.
-  13. `#backups` — Online SQLite backup snapshots list, instant backup creation, `.db` download.
-  14. `#audit` — Append-only security and administrative audit trail.
-  15. `#administrator` — Admin account verification, password rotation, and one-time API token generation.
-
----
-
-## 9. REST API & WebSocket Protocol Reference
-
-### Authentication Mechanisms
-- **Session Cookie**: `nx9_session=<UUID>` returned via `POST /api/v1/auth/login`.
-- **Bearer Token**: `Authorization: Bearer nx9_<UUID>_<SECRET>` passed in HTTP headers.
-
-### Complete REST Route Inventory
-```http
-POST   /api/v1/auth/login                    - Authenticate administrator & create session
-POST   /api/v1/auth/logout                   - Invalidate active session
-GET    /api/v1/auth/session                  - Query authenticated session info
-POST   /api/v1/auth/password                 - Rotate admin password (invalidates all sessions)
-GET    /api/v1/auth/tokens                   - List active API token metadata
-POST   /api/v1/auth/tokens                   - Generate new API token (one-time raw secret return)
-DELETE /api/v1/auth/tokens/{id}              - Revoke an API token
-
-GET    /api/v1/system                        - System operational overview and object counts
-GET    /api/v1/system/health                 - Public health check endpoint
-GET    /api/v1/system/version                - Version, build edition, and architecture
-GET    /api/v1/system/settings               - List all appliance key-value settings
-PUT    /api/v1/system/settings               - Upsert appliance setting
-
-GET    /api/v1/interfaces                    - List all WireGuard interfaces
-POST   /api/v1/interfaces                    - Create WireGuard interface
-GET    /api/v1/interfaces/{id}               - Get interface details
-PUT    /api/v1/interfaces/{id}               - Update interface configuration
-DELETE /api/v1/interfaces/{id}               - Delete interface (cascades to peers)
-POST   /api/v1/interfaces/{id}/enable        - Set interface IFF_UP
-POST   /api/v1/interfaces/{id}/disable       - Set interface IFF_DOWN
-GET    /api/v1/interfaces/{id}/status        - Query live kernel netlink telemetry
-GET    /api/v1/interfaces/{id}/peers         - List peers attached to interface
-POST   /api/v1/interfaces/{id}/peers         - Enroll new peer on interface
-
-GET    /api/v1/peers/{id}                    - Get peer details
-PUT    /api/v1/peers/{id}                    - Update peer parameters
-DELETE /api/v1/peers/{id}                    - Delete peer
-POST   /api/v1/peers/{id}/enable             - Enable peer
-POST   /api/v1/peers/{id}/disable            - Disable peer
-GET    /api/v1/peers/{id}/config             - Download client .conf file
-GET    /api/v1/peers/{id}/qr                 - Render QR code (SVG / PNG / ASCII)
-
-GET    /api/v1/networks                      - List subnet networks
-POST   /api/v1/networks                      - Create subnet network
-GET    /api/v1/networks/{id}                 - Get network details
-DELETE /api/v1/networks/{id}                 - Delete network
-GET    /api/v1/networks/{id}/available       - List available unallocated IP addresses
-
-GET    /api/v1/routes                        - List kernel routing entries
-POST   /api/v1/routes                        - Create routing entry
-DELETE /api/v1/routes/{id}                   - Delete routing entry
-
-GET    /api/v1/firewall/rules                - List nftables firewall rules
-POST   /api/v1/firewall/rules                - Create firewall rule
-DELETE /api/v1/firewall/rules/{id}           - Delete firewall rule
-POST   /api/v1/firewall/rules/{id}/enable    - Enable firewall rule
-POST   /api/v1/firewall/rules/{id}/disable   - Disable firewall rule
-
-GET    /api/v1/reconcile/plan                - Read-only drift calculation plan
-POST   /api/v1/reconcile/apply               - Serialized kernel apply and convergence check
-
-GET    /api/v1/diagnostics/all               - Run full diagnostics across all 9 subsystems
-GET    /api/v1/diagnostics/{subsystem}       - Run diagnostics for single subsystem
-
-GET    /api/v1/backups                       - List backup records
-POST   /api/v1/backups/create                - Trigger atomic online VACUUM INTO snapshot
-GET    /api/v1/backups/{id}/download         - Download raw SQLite database snapshot
-POST   /api/v1/backups/{id}/restore          - Restore database with automatic safety backup
-DELETE /api/v1/backups/{id}                  - Delete backup snapshot file and metadata
-
-GET    /api/v1/audit                         - Query append-only audit trail
-```
-
----
-
-## 10. Native CLI Command System
-
-`nx9-wg` provides 100% native CLI coverage across all 17 subcommands:
-
-```bash
-# Global output formats: --format table | json | yaml | csv
-nx9-wg version
-nx9-wg serve --bind 127.0.0.1:8080
-nx9-wg init --generate-password --write-password-file /var/lib/nx9-wg/admin-password
-
-# Administration & Authentication
-nx9-wg admin info
-nx9-wg admin password
-nx9-wg admin token create "ci-pipeline" --expires-in-days 90 --write-token-file /tmp/token
-nx9-wg admin token list
-nx9-wg admin token revoke <TOKEN_UUID>
-
-# Interface & Peer Management
-nx9-wg interface list
-nx9-wg interface create wg0 --address-v4 10.100.0.1/24 --port 51820 --mtu 1420
-nx9-wg peer create --interface wg0 --name alice --profile full_tunnel --mtu 1280
-nx9-wg peer qr <PEER_UUID>
-nx9-wg peer config <PEER_UUID>
-
-# Networking, Firewall & NAT
-nx9-wg route add --destination 192.168.50.0/24 --gateway 10.100.0.2 --interface-name wg0
-nx9-wg firewall add --name "allow-dns" --protocol udp --port 53 --action accept --priority 10
-nx9-wg nat enable
-nx9-wg forwarding enable
-
-# State Reconciliation & Diagnostics
-nx9-wg reconcile plan
-nx9-wg reconcile apply
-nx9-wg diagnostics all
-
-# Disaster Recovery
-nx9-wg backup create --description "Pre-upgrade snapshot"
-nx9-wg backup verify /var/lib/nx9-wg/backups/nx9-backup-...db
-nx9-wg backup restore <BACKUP_UUID>
-```
-
----
-
-## 11. Security Model & Capability Isolation
-
-### A. Single Administrator Identity
-- Database-level integrity constraint: `CHECK (id = 1)` in `admins` table.
-- Eliminates multi-tenant privilege escalation and role-confusion attack surfaces.
-
-### B. Credential Protection
-- **Passwords**: Hashed with Argon2id using unique cryptographic salts.
-- **API Tokens**: Stored exclusively as SHA-256 digests in SQLite; raw tokens are displayed once upon creation.
-- **Secret Redaction**: Private keys, preshared keys, and password hashes implement custom `std::fmt::Debug` implementations returning `[REDACTED]`.
-
-### C. Hardened systemd Sandbox (`nx9-wg.service`)
-```ini
-[Unit]
-Description=NX9 WireGuard Native VPN Platform
-After=network.target network-online.target
-
-[Service]
-Type=simple
-ExecStart=/usr/local/bin/nx9-wg serve
-Restart=always
-RestartSec=5s
-
-# Minimal Linux Capabilities
-CapabilityBoundingSet=CAP_NET_ADMIN CAP_NET_BIND_SERVICE
-AmbientCapabilities=CAP_NET_ADMIN CAP_NET_BIND_SERVICE
-
-# Sandboxing Directives
-ProtectSystem=strict
-ProtectHome=true
-PrivateTmp=true
-ProtectControlGroups=true
-RestrictSUIDSGID=true
-LockPersonality=true
-NoNewPrivileges=true
-
-# Allowed Network Address Families
-RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6 AF_NETLINK
-
-# Explicit Read-Write Paths (for state and direct procfs forwarding)
-ReadWritePaths=/var/lib/nx9-wg /etc/nx9-wg /var/log/nx9-wg /proc/sys/net
-ProtectKernelTunables=false
-
-# Systemd Directory Management
-StateDirectory=nx9-wg
-ConfigurationDirectory=nx9-wg
-LogsDirectory=nx9-wg
-```
-
----
-
-## 12. Disaster Recovery, Backups & Upgrades
-
-### Atomic Online Backups
-- Uses SQLite `VACUUM INTO` to produce non-blocking, consistent binary database snapshots while the daemon is actively serving traffic.
-- Generates SHA-256 manifest records for each snapshot.
-
-### Safe Rollback Workflow
-```
- ┌────────────────────────────────────────────────────────┐
- │ 1. Operator Initiates Restore (nx9-wg backup restore)   │
- └───────────────────────────┬────────────────────────────┘
-                             │
- ┌───────────────────────────▼────────────────────────────┐
- │ 2. Verify Backup File Size, Magic Header & SHA-256     │
- └───────────────────────────┬────────────────────────────┘
-                             │
- ┌───────────────────────────▼────────────────────────────┐
- │ 3. Create Pre-Restore Safety Snapshot (Automatic Fallback│
- └───────────────────────────┬────────────────────────────┘
-                             │
- ┌───────────────────────────▼────────────────────────────┐
- │ 4. Close Connection Pools, Replace .db, Clean WAL/SHM  │
- └───────────────────────────┬────────────────────────────┘
-                             │
- ┌───────────────────────────▼────────────────────────────┐
- │ 5. Reopen Database & Execute Reconciliation Engine     │
- │    (Kernel state converged to restored desired state)   │
- └────────────────────────────────────────────────────────┘
-```
-
----
-
-## 13. Release Engineering & Deployment Lifecycle
-
-### Automated Packaging Pipeline ([`scripts/package-release.sh`](file:///home/sunil/Programs/nx9-wg/scripts/package-release.sh))
-Generates self-contained, reproducible distribution archives in `target/dist/`:
-- `nx9-wg-v1.0.0-linux-x86_64.tar.gz` (7.8 MB)
-- `nx9-wg-v1.0.0-linux-x86_64.tar.xz` (5.0 MB)
-- `nx9-wg-v1.0.0-linux-x86_64.sha256` (Cryptographic checksum manifest)
-
-### Production Filesystem Layout & Permissions
-```
-/usr/local/bin/nx9-wg               0755  root:root  - Native Executable Binary
-/etc/nx9-wg/                        0750  root:root  - Configuration Directory
- └── config.toml                    0640  root:root  - Production Configuration
-/var/lib/nx9-wg/                    0700  root:root  - State & SQLite Directory
- ├── nx9-wg.db                      0600  root:root  - Authoritative SQLite Database
- ├── nx9-wg.db-wal                  0600  root:root  - WAL Journal
- ├── admin-password                 0600  root:root  - Initial Bootstrap Password
- └── backups/                       0700  root:root  - Backup Snapshots Directory
-/var/log/nx9-wg/                    0750  root:root  - Operational Logs
-/etc/systemd/system/nx9-wg.service  0644  root:root  - Hardened Service Unit
-```
-
----
-
-## 14. Quality Assurance & Verification Evidence
-
-All quality gates have been executed and verified clean:
-
-| Quality Gate | Verification Command | Result |
-| :--- | :--- | :---: |
-| **Code Formatting** | `cargo fmt --all -- --check` | **PASS** (Zero diffs) |
-| **Workspace Compilation** | `cargo check --workspace` | **PASS** (Zero errors) |
-| **Workspace Unit Tests** | `cargo test --workspace` | **PASS** (**162 / 162 passed**, 100%) |
-| **Clippy Linter Check** | `cargo clippy --workspace --all-targets --all-features -- -D warnings` | **PASS** (Zero warnings) |
-| **Comprehensive CLI Suite** | `LIVE=0 bash scripts/test-cli-comprehensive.sh` | **PASS** (**203 passed** / 7 skipped) |
-| **Native Integration Suite** | `LIVE=0 bash scripts/test-native-integration.sh` | **PASS** (**19 passed** / 1 skipped) |
-| **Dedicated Live Kernel Suite** | `LIVE=0 bash scripts/test-live-kernel.sh` | **PASS** (**23 passed** / 1 skipped) |
-| **Subprocess Safety Audit** | Automated source scan for `Command::new` | **PASS** (Zero subprocesses) |
-| **Secret Leakage Audit** | Automated audit for plaintext credentials | **PASS** (Zero secrets leaked) |
-| **Standalone Package Verification**| Fresh directory extraction & independent run | **PASS** (Standalone execution) |
-| **Git Diff Whitespace Audit** | `git diff --check` | **PASS** (Zero whitespace issues) |
-
----
-
-## 15. Ecosystem & License Summary
-
-`nx9-wg` is part of the **NX9 Ecosystem** ([https://nx9.in](https://nx9.in)) created by **Sunil Thakare**.
-
-Dual-licensed under either:
-- **MIT License** ([`LICENSE-MIT`](file:///home/sunil/Programs/nx9-wg/LICENSE-MIT))
-- **Apache License, Version 2.0** ([`LICENSE-APACHE`](file:///home/sunil/Programs/nx9-wg/LICENSE-APACHE))
-
-at your option.
-
----
-
-> **NX9 WireGuard** — Sovereign, Self-Hosted, Linux-Native Network Infrastructure.
diff --git a/README.md b/README.md
index 1f15c70..7c575aa 100644
--- a/README.md
+++ b/README.md
@@ -455,5 +455,5 @@ the captured evidence have been redacted where applicable.
 
 ![NX9-WG Backups](screenshots/backup.png)
 
-> **Additional evidence:** `screenshots/admin-instance.pdf` contains the captured administrative
+> **Additional evidence:** `screenshots/admin-instance.png` contains the captured administrative
 > instance documentation and is retained in the repository alongside the UI screenshots.