fix(Chunk4): purge all Pi-hole references from split files

- 08-deployment-phases: Pi-hole → AdGuard Home in Phase 1 order
- 09-open-questions: blocker replaced, decision marked resolved
- 10-appendix: removed from DockerHub table, count 16→15, dir pihole/→adguard/
- 05-network-architecture: port allocation DNS label updated
- All mirrored to master PRD

05-network-architecture.md

@@ -41,7 +41,7 @@ Client → Technitium (local record?) → AdGuard Home (recursive + blocklist)
 ## Port Allocation (Reserved)
 | Port | Service |
 |------|---------|
-| 53 | DNS (Technitium / Pi-hole) |
+| 53 | DNS (Technitium / AdGuard) |
 | 80/443 | HTTP/S (Traefik) |
 | 3000 | Grafana |
 | 9090 | Prometheus |

08-deployment-phases.md

@@ -6,7 +6,7 @@
 | Order | Service | Target Node | Why First | Dependencies |
 |-------|---------|-------------|-----------|--------------|
 | 1 | **Technitium DNS** | MK7 | Name resolution for internal services | None |
-| 2 | **Pi-hole** | MK7 | Recursive DNS + ad-block | Technitium (via conditional forwarding) |
+| 2 | **AdGuard Home** | MK7 | Recursive DNS + ad-block | Technitium (via conditional forwarding) |
 | 3 | **Traefik** | MK7 | Edge router for all HTTP ingress | DNS (needs `*.labs.internal` to resolve) |
 | 4 | **Authelia** | MK7 | Auth layer before exposing any mgmt UI | Traefik (depends on ForwardAuth middleware) |
 | 5 | **Portainer** | MK7 | Container management UI | Traefik + Authelia (for secured access) |

09-open-questions.md

@@ -5,7 +5,7 @@
 |---|----------|--------|----------------------|
 | 1 | **Domain name** — Does Bobby own a domain (e.g., `bobbysh.me`) or do we use a fake TLD (`labs.internal`)? | **Critical** — TLS certs, Authelia, and DNS all depend on this. | Use `labs.internal` + self-signed CA |
 | 2 | **Technitium upstream** — DoH, DoT, or plain UDP to upstream resolver (e.g., Cloudflare 1.1.1.1)? | Low — can default to DoH | DoH → `https://cloudflare-dns.com/dns-query` |
-| 3 | **Pi-hole vs Technitium conflict** — Both run on MK7 port 53. Run Pi-hole on non-standard port with Technitium as conditional forwarder? Or separate nodes? | **Critical** — port 53 collision | Technitium on 53, Pi-hole on 5053, forward to Pi-hole from Technitium |
+| 3 | **AdGuard Home vs Technitium layout** — AdGuard runs on port 3000, Technitium on 53. No collision, but conditional forwarding from Technitium to AdGuard needs config. | Low — both run independently | Technitium uses upstream AdGuard for recursive queries |
 | 4 | **Jellyfin media storage** — External USB on MK7? SMB share? NVMe? | Medium | External USB mounted at `/media` on MK7 |
 | 5 | **Backup target on MK7** — Capacity? Dedicated drive? Rsync target path? | Medium | `/backups/<service-name>/` on MK7 secondary storage |
 | 6 | **Nextcloud database** — Use existing PostgreSQL on MK7, or deploy Nextcloud AIO (bundled)? | Medium — affects resource allocation on MK7 | Deploy standalone PostgreSQL container on MK7 for Nextcloud AIO is too heavy |
@@ -15,6 +15,6 @@
 | 10 | **Beszel alert thresholds** — CPU %, memory %, disk % triggers not defined. | Low | Defaults in Beszel container |
 
 ## Outstanding Decisions Required
-1. **Pi-hole inclusion** — Not in Bobby's original list. I added it as a DNS-layer complement to Technitium. **Remove if Bobby doesn't want it.**
+1. ~~Pi-hole inclusion~~ — **Resolved.** AdGuard Home replaces Pi-hole in Phase 1.
 2. **Authelia two-factor method** — TOTP via app (Google Authenticator) vs WebAuthn/FIDO2 keys?
 3. **Home vs remote access** — If Bobby wants to share Jellyfin with friends/family outside Tailscale, public domain + Authelia guard is required.

10-appendix.md

@@ -18,10 +18,9 @@
 | Prowlarr | `linuxserver/prowlarr` | `linuxserver` | 35,913,487 | 403 | 2026-05-25 | ✅ 200 |
 | Vaultwarden | `vaultwarden/server` | `vaultwarden` | 287,182,978 | 1,454 | 2026-05-17 | ✅ 200 |
 | Nextcloud | `nextcloud` | `library` | 1,011,978,204 | 4,485 | 2026-05-23 | ✅ 200 |
-| Pi-hole | `pihole/pihole` | `pihole` | 961,220,209 | 2,943 | 2026-05-25 | ✅ 200 |
 | Authelia | `authelia/authelia` | `authelia` | 75,183,682 | 208 | 2026-05-25 | ✅ 200 |
 
-**Total unique images:** 16 (including Pi-hole)
+**Total unique images:** 15
 **Community health indicator:** All images have > 10 stars, > 1M pulls (except Beszel 32 stars, Homepage 40 stars — acceptable for young projects)
 **Freshness:** All updated within 90 days except Beszel (30 days — still acceptable)
 
@@ -30,7 +29,7 @@
 ~/.ansible-repo/new-build/
 ├── phase-1/                    # Infrastructure
 │   ├── technitium/
-│   ├── pihole/
+│   ├── adguard/
 │   ├── traefik/
 │   ├── authelia/
 │   ├── portainer/

homelab-services-stack-prd.md

@@ -432,7 +432,7 @@ traefik.http.middlewares.authelia.forwardauth.address: http://authelia:9091/api/
 ~/.ansible-repo/new-build/
 ├── phase-1/                    # Infrastructure
 │   ├── technitium/
-│   ├── pihole/
+│   ├── adguard/
 │   ├── traefik/
 │   ├── authelia/
 │   ├── portainer/