diff --git a/apps/gitea.yaml b/apps/gitea.yaml
new file mode 100644
index 0000000..714c1ed
--- /dev/null
+++ b/apps/gitea.yaml
@@ -0,0 +1,194 @@
+---
+# Namespace (trust zone; default-deny + policies apply)
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: gitea
+  labels:
+    homelab.keithjackson.dev/app-namespace: 'true'
+    gateway-access: shared
+  annotations:
+    homelab.keithjackson.dev/backup-policy: daily-offcluster
+---
+# Default-deny baseline (R-NET-01): deny all, allow only DNS
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: default-deny
+  namespace: gitea
+  labels:
+    homelab.keithjackson.dev/baseline: default-deny
+spec:
+  podSelector: {}
+  policyTypes:
+  - Ingress
+  - Egress
+  ingress: []
+  egress:
+  - to:
+    - namespaceSelector:
+        matchLabels:
+          kubernetes.io/metadata.name: kube-system
+    ports:
+    - protocol: UDP
+      port: 53
+    - protocol: TCP
+      port: 53
+---
+# PVC gitea-data (R-STATE)
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: gitea-data
+  namespace: gitea
+  labels:
+    app.kubernetes.io/name: gitea
+spec:
+  accessModes:
+  - ReadWriteOnce
+  storageClassName: longhorn
+  resources:
+    requests:
+      storage: 10Gi
+---
+# Deployment (R-PLAT-02)
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: gitea
+  namespace: gitea
+  labels:
+    app.kubernetes.io/name: gitea
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: gitea
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: gitea
+        homelab.keithjackson.dev/egress-class: internet
+        homelab.keithjackson.dev/auth-mode: oidc
+      annotations:
+        homelab.keithjackson.dev/auth-mode: oidc
+        homelab.keithjackson.dev/auth-groups: platform-admins
+    spec:
+      containers:
+      - name: gitea
+        image: gitea/gitea:1.24.3
+        ports:
+        - containerPort: 3000
+        volumeMounts:
+        - name: data
+          mountPath: /data/data
+      volumes:
+      - name: data
+        persistentVolumeClaim:
+          claimName: gitea-data
+---
+# Service
+apiVersion: v1
+kind: Service
+metadata:
+  name: gitea
+  namespace: gitea
+  labels:
+    app.kubernetes.io/name: gitea
+spec:
+  selector:
+    app.kubernetes.io/name: gitea
+  ports:
+  - name: port-3000
+    port: 3000
+    targetPort: 3000
+---
+# CiliumNetworkPolicy gateway-ingress allow (R-NET-01/02): gitea-allow-gateway-ingress
+apiVersion: cilium.io/v2
+kind: CiliumNetworkPolicy
+metadata:
+  name: gitea-allow-gateway-ingress
+  namespace: gitea
+  labels:
+    app.kubernetes.io/name: gitea
+spec:
+  endpointSelector:
+    matchLabels:
+      app.kubernetes.io/name: gitea
+  ingress:
+  - fromEntities:
+    - ingress
+    toPorts:
+    - ports:
+      - port: '3000'
+        protocol: TCP
+---
+# HTTPRoute gitea-3000 (R-TLS/R-DNS)
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: gitea-3000
+  namespace: gitea
+  labels:
+    app.kubernetes.io/name: gitea
+  annotations:
+    homelab.keithjackson.dev/auth-mode: oidc
+    homelab.keithjackson.dev/auth-groups: platform-admins
+spec:
+  parentRefs:
+  - name: shared
+    namespace: gateway
+    sectionName: https
+  hostnames:
+  - gitea.home.keithjackson.dev
+  rules:
+  - matches:
+    - path:
+        type: PathPrefix
+        value: /
+    backendRefs:
+    - name: gitea
+      port: 3000
+---
+# ServiceMonitor (R-OBS-01)
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: gitea
+  namespace: gitea
+  labels:
+    release: kube-prometheus-stack
+    app.kubernetes.io/name: gitea
+spec:
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: gitea
+  namespaceSelector:
+    matchNames:
+    - gitea
+  endpoints:
+  - port: metrics
+    interval: 30s
+---
+# PrometheusRule SLI alerts (R-OBS-01)
+apiVersion: monitoring.coreos.com/v1
+kind: PrometheusRule
+metadata:
+  name: gitea-slis
+  namespace: gitea
+  labels:
+    release: kube-prometheus-stack
+    app.kubernetes.io/name: gitea
+spec:
+  groups:
+  - name: gitea.slis
+    rules:
+    - alert: gitea-down
+      expr: up{job="gitea"} == 0
+      for: 5m
+      labels:
+        severity: critical
+        service: gitea
+      annotations:
+        summary: gitea is down
+        description: 'gitea has been unreachable for 5m (SLI: up).'
diff --git a/apps/kustomization.yaml b/apps/kustomization.yaml
index d370026..e991ff0 100644
--- a/apps/kustomization.yaml
+++ b/apps/kustomization.yaml
@@ -7,3 +7,4 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 resources:
   - pihole.yaml
+  - gitea.yaml
diff --git a/catalog/gitea.yaml b/catalog/gitea.yaml
new file mode 100644
index 0000000..ddb9fea
--- /dev/null
+++ b/catalog/gitea.yaml
@@ -0,0 +1,42 @@
+# ServiceDefinition: gitea
+# Source of truth: spec docs/13-service-catalog.md row 12; docs/15-identity-and-access.md; docs/05.
+# public git hosting | egress internet | repos+DB on Longhorn (irreplaceable, DR-critical) | auth oidc.
+# Bootstrapping-critical: self-hosts the platform's GitOps source + CI/CD, onboarded EARLY (docs/13
+# "Gitea is bootstrapping-critical", WS-APPS step 2, right after PiHole). A cluster loss would take its
+# own git host with it, so repos/DB are backed up off-cluster + mirrored (R-STATE-03).
+# Single-container Gitea with the built-in SQLite datastore is sufficient at home scale; the repos and
+# DB live on one Longhorn PVC (/data), so no external PostgreSQL is required for this onboarding.
+# Validates against schemas/servicedefinition.schema.json.
+name: gitea
+kind: container
+source:
+  image: gitea/gitea:1.24.3     # pinned recent stable tag (R-UPD-01); update.range governs advancement
+exposure: public                # edge-forwarded git host at gitea.home.keithjackson.dev (docs/09; R-DNS/R-NET)
+egress: internet                # normal WAN egress (docs/03; R-NET-05)
+storage:
+  - name: data
+    size: 10Gi
+    class: longhorn             # repos + SQLite DB on 3-replica Longhorn; irreplaceable (docs/04; R-STATE-02)
+dependencies: []                # default-deny: reaches only DNS; git clients reach it north-south via the Gateway (R-NET-01/02)
+ingressRoutes:
+  - host: gitea.home.keithjackson.dev
+    port: 3000                  # Gitea HTTP web/API; TLS terminates at the shared Gateway (docs/08, docs/09)
+auth:
+  mode: oidc                    # native Keycloak OIDC client (docs/13 SSO row, docs/15 "Native OIDC" set; R-IDP-02)
+  groups:
+    - platform-admins           # access scoped to an authorized group (R-IDP-06)
+  # NOTE (OIDC follow-up + break-glass): Gitea keeps a LOCAL admin as the break-glass path so an IdP
+  # outage never locks the operator out of recovery tools (docs/15 "Availability caveat"). At initial
+  # deploy Gitea comes up on that local admin; the Keycloak OIDC client (+ SOPS client secret) is wired
+  # once Keycloak is live. This declaration records the target integration; it does not embed a secret.
+update:
+  channel: stable               # R-UPD-01
+  range: ">=1.22.0 <2.0.0"      # stay on the 1.x stable line
+  cadence: "0 4 * * *"
+  autoRollbackOnFailedHealth: true   # R-UPD-03
+observability:
+  metrics: true
+  slis:
+    - up                        # git host down is a critical alert (docs/10; R-OBS-01)
+backup:
+  policy: daily-offcluster      # DR-critical: repos/DB backed up off-cluster + mirrored (docs/13, docs/04; R-STATE-03)