diff --git a/apps/did-wallet/manifest.yml b/apps/did-wallet/manifest.yml
index d00974b1..c89f6561 100644
--- a/apps/did-wallet/manifest.yml
+++ b/apps/did-wallet/manifest.yml
@@ -27,7 +27,7 @@ app:
     apparmor_profile: did-wallet
     
   ports:
-    - host: 8083
+    - host: 8088
       container: 8080
       protocol: tcp  # Web UI
     
@@ -42,7 +42,7 @@ app:
     
   health_check:
     type: http
-    endpoint: http://localhost:8083
+    endpoint: http://127.0.0.1:8080
     path: /health
     interval: 30s
     timeout: 5s
diff --git a/apps/lightning-stack/manifest.yml b/apps/lightning-stack/manifest.yml
index 8e7c6e2f..4c5e4431 100644
--- a/apps/lightning-stack/manifest.yml
+++ b/apps/lightning-stack/manifest.yml
@@ -29,13 +29,13 @@ app:
     apparmor_profile: lightning-stack
     
   ports:
-    - host: 9737
+    - host: 9738
       container: 9735
       protocol: tcp  # P2P
     - host: 10010
       container: 10009
       protocol: tcp  # gRPC
-    - host: 8087
+    - host: 8091
       container: 8080
       protocol: tcp  # REST/Web UI
     
@@ -53,7 +53,7 @@ app:
     
   health_check:
     type: http
-    endpoint: http://localhost:8087
+    endpoint: http://127.0.0.1:8080
     path: /v1/getinfo
     interval: 30s
     timeout: 5s
diff --git a/apps/morphos-server/manifest.yml b/apps/morphos-server/manifest.yml
index d506cf68..dd032bf4 100644
--- a/apps/morphos-server/manifest.yml
+++ b/apps/morphos-server/manifest.yml
@@ -27,7 +27,7 @@ app:
     apparmor_profile: morphos-server
     
   ports:
-    - host: 8086
+    - host: 8089
       container: 8080
       protocol: tcp  # Web UI
     
@@ -43,7 +43,7 @@ app:
     
   health_check:
     type: http
-    endpoint: http://localhost:8086
+    endpoint: http://127.0.0.1:8080
     path: /health
     interval: 30s
     timeout: 5s
diff --git a/core/archipelago/src/container/prod_orchestrator.rs b/core/archipelago/src/container/prod_orchestrator.rs
index 2639fe2c..78a36479 100644
--- a/core/archipelago/src/container/prod_orchestrator.rs
+++ b/core/archipelago/src/container/prod_orchestrator.rs
@@ -1032,6 +1032,37 @@ fn resolve_catalog_image(resolved_manifest: &mut AppManifest) {
     }
 }
 
+/// Host-port collisions across a set of manifests, excluding pairs that are
+/// mutually exclusive by design (the bitcoin-core/knots variants; the legacy
+/// mempool umbrella vs its split frontend, which render the same container).
+/// The strfry/vaultwarden 8082 collision shipped in a SIGNED catalog
+/// (2026-07-09) because nothing checked — surface these loudly at load time.
+fn host_port_collisions<'m>(
+    manifests: impl Iterator<Item = &'m AppManifest>,
+) -> Vec<(u16, String, String)> {
+    fn mutually_exclusive(a: &str, b: &str) -> bool {
+        let pair = |x: &str, y: &str| (a == x && b == y) || (a == y && b == x);
+        pair("bitcoin-core", "bitcoin-knots") || pair("mempool", "archy-mempool-web")
+    }
+    let mut by_port: std::collections::BTreeMap<u16, Vec<&str>> = Default::default();
+    for m in manifests {
+        for p in &m.app.ports {
+            by_port.entry(p.host).or_default().push(m.app.id.as_str());
+        }
+    }
+    let mut out = Vec::new();
+    for (port, apps) in by_port {
+        for i in 0..apps.len() {
+            for j in i + 1..apps.len() {
+                if apps[i] != apps[j] && !mutually_exclusive(apps[i], apps[j]) {
+                    out.push((port, apps[i].to_string(), apps[j].to_string()));
+                }
+            }
+        }
+    }
+    out
+}
+
 /// Internal: track a manifest together with the absolute directory it was loaded
 /// from, so Build sources can resolve relative `context:` paths.
 #[derive(Debug, Clone)]
@@ -1387,6 +1418,16 @@ impl ProdContainerOrchestrator {
                 );
             }
         }
+        for (port, a, b) in
+            host_port_collisions(state.manifests.values().map(|lm| &lm.manifest))
+        {
+            tracing::error!(
+                port,
+                app_a = %a,
+                app_b = %b,
+                "host-port collision between app manifests — installing both will break whichever starts second"
+            );
+        }
         Ok(state.manifests.len())
     }
 
@@ -5269,6 +5310,58 @@ app:
         assert!(!calls.iter().any(|c| c.starts_with("start_container:")));
     }
 
+    #[test]
+    fn host_port_collisions_flags_pairs_and_skips_exclusive_variants() {
+        let with_port = |id: &str, port: u16| {
+            let yaml = format!(
+                "app:\n  id: {id}\n  name: {id}\n  version: 1.0.0\n  container:\n    image: {id}:1\n  ports:\n    - host: {port}\n      container: 80\n      protocol: tcp\n"
+            );
+            AppManifest::parse(&yaml).unwrap()
+        };
+        let a = with_port("strfry", 8082);
+        let b = with_port("vaultwarden", 8082);
+        let c = with_port("grafana", 3001);
+        let core = with_port("bitcoin-core", 8332);
+        let knots = with_port("bitcoin-knots", 8332);
+
+        let found = host_port_collisions([&a, &b, &c, &core, &knots].into_iter());
+        assert_eq!(
+            found,
+            vec![(8082, "strfry".to_string(), "vaultwarden".to_string())]
+        );
+    }
+
+    #[test]
+    fn repo_app_manifests_have_no_host_port_collisions() {
+        // The signed catalog regenerates from apps/*/manifest.yml — a latent
+        // collision here ships fleet-wide at the next ceremony (strfry/
+        // vaultwarden 8082, found live 2026-07-09). Keep the tree clean.
+        let apps_dir = Path::new(env!("CARGO_MANIFEST_DIR")).join("../../apps");
+        if !apps_dir.exists() {
+            return; // not a full checkout (e.g. crate published standalone)
+        }
+        let mut manifests = Vec::new();
+        for entry in std::fs::read_dir(&apps_dir).unwrap() {
+            let path = entry.unwrap().path().join("manifest.yml");
+            if !path.exists() {
+                continue;
+            }
+            if let Ok(m) = AppManifest::from_file(&path) {
+                manifests.push(m);
+            }
+        }
+        assert!(
+            manifests.len() > 10,
+            "expected to parse the repo app manifests, got {}",
+            manifests.len()
+        );
+        let found = host_port_collisions(manifests.iter());
+        assert!(
+            found.is_empty(),
+            "host-port collisions in apps/ manifests: {found:?}"
+        );
+    }
+
     #[test]
     fn cascade_pairs_cover_backend_recreate_with_running_dependent() {
         use std::collections::HashSet;