diff --git a/charts/supply-chain/templates/_helpers.tpl b/charts/supply-chain/templates/_helpers.tpl
index e3d23e02..156de036 100644
--- a/charts/supply-chain/templates/_helpers.tpl
+++ b/charts/supply-chain/templates/_helpers.tpl
@@ -93,7 +93,6 @@ Sigstore environment variables used in Pipeline Tasks
   value: $(params.ca-file)
 - name: COSIGN_YES
   value: "true"
-{{- if eq .Values.rhtas.oidc.enabled true }}
 - name: OIDC_IDENTITY
   value: $(params.oidc-identity)
 - name: OIDC_ISSUER
@@ -106,6 +105,7 @@ Sigstore environment variables used in Pipeline Tasks
   value: $(params.oidc-issuer)
 - name: SIGSTORE_OIDC_ISSUER
   value: $(params.oidc-issuer)
+{{- if eq .Values.rhtas.oidc.enabled true }}
 - name: OIDC_CLIENT_ID
   value: $(params.rhtas-oidc-client-id)
 - name: COSIGN_OIDC_CLIENT_ID
@@ -135,11 +135,11 @@ Sigstore params used in Pipeline Tasks
   value: $(params.tuf-url)
 - name: cli-server-url
   value: $(params.cli-server-url)
-{{- if eq .Values.rhtas.oidc.enabled true }}
 - name: oidc-identity
   value: $(params.oidc-identity)
 - name: oidc-issuer
   value: $(params.oidc-issuer)
+{{- if eq .Values.rhtas.oidc.enabled true }}
 - name: rhtas-oidc-client-id
   value: $(params.rhtas-oidc-client-id)
 {{- end }}
@@ -164,13 +164,13 @@ Sigstore params descriptions used in Pipeline Tasks
 - description: Cosign CLI server URL
   name: cli-server-url
   type: string
-{{- if eq .Values.rhtas.oidc.enabled true }}
 - description: OIDC identity in signatures
   name: oidc-identity
   type: string
 - description: OIDC issuer in signatures
   name: oidc-issuer
   type: string
+{{- if eq .Values.rhtas.oidc.enabled true }}
 - description: RHTAS OIDC client ID
   name: rhtas-oidc-client-id
   type: string
diff --git a/charts/tekton-chains/Chart.yaml b/charts/tekton-chains/Chart.yaml
new file mode 100644
index 00000000..858878a5
--- /dev/null
+++ b/charts/tekton-chains/Chart.yaml
@@ -0,0 +1,17 @@
+apiVersion: v2
+name: tekton-chains
+description: Tekton Chains configuration for OpenShift Pipelines supply chain security with RHTAS keyless signing
+type: application
+version: 0.1.0
+appVersion: "1.15.0"
+keywords:
+  - tekton-chains
+  - supply-chain-security
+  - sigstore
+  - in-toto
+  - slsa
+  - zero-trust
+  - openshift-pipelines
+maintainers:
+  - name: Zero Trust Validated Patterns Team
+    email: ztvp-arch-group@redhat.com
diff --git a/charts/tekton-chains/templates/_helpers.tpl b/charts/tekton-chains/templates/_helpers.tpl
new file mode 100644
index 00000000..52a669ab
--- /dev/null
+++ b/charts/tekton-chains/templates/_helpers.tpl
@@ -0,0 +1,52 @@
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "tekton-chains.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "tekton-chains.fullname" -}}
+{{- if .Values.fullnameOverride }}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- $name := default .Chart.Name .Values.nameOverride }}
+{{- if contains $name .Release.Name }}
+{{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "tekton-chains.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "tekton-chains.labels" -}}
+helm.sh/chart: {{ include "tekton-chains.chart" . }}
+{{ include "tekton-chains.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+app.kubernetes.io/part-of: tekton-chains
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "tekton-chains.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "tekton-chains.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
diff --git a/charts/tekton-chains/templates/tektonconfig-chains.yaml b/charts/tekton-chains/templates/tektonconfig-chains.yaml
new file mode 100644
index 00000000..9edb3520
--- /dev/null
+++ b/charts/tekton-chains/templates/tektonconfig-chains.yaml
@@ -0,0 +1,100 @@
+{{- if .Values.chains.enabled }}
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: tekton-chains-config
+  namespace: {{ .Release.Namespace }}
+  annotations:
+    argocd.argoproj.io/sync-wave: "47"
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: tekton-chains-config
+  annotations:
+    argocd.argoproj.io/sync-wave: "47"
+rules:
+- apiGroups: ["operator.tekton.dev"]
+  resources: ["tektonconfigs"]
+  verbs: ["get", "patch"]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: tekton-chains-config
+  annotations:
+    argocd.argoproj.io/sync-wave: "47"
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: tekton-chains-config
+subjects:
+- kind: ServiceAccount
+  name: tekton-chains-config
+  namespace: {{ .Release.Namespace }}
+---
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: configure-tekton-chains
+  namespace: {{ .Release.Namespace }}
+  annotations:
+    argocd.argoproj.io/sync-wave: "47"
+    argocd.argoproj.io/hook: PostSync
+    argocd.argoproj.io/hook-delete-policy: BeforeHookCreation
+  labels:
+    {{- include "tekton-chains.labels" . | nindent 4 }}
+spec:
+  backoffLimit: 10
+  template:
+    metadata:
+      labels:
+        {{- include "tekton-chains.selectorLabels" . | nindent 8 }}
+    spec:
+      serviceAccountName: tekton-chains-config
+      restartPolicy: Never
+      containers:
+      - name: configure-chains
+        image: registry.redhat.io/openshift4/ose-cli:latest
+        imagePullPolicy: IfNotPresent
+        resources:
+          requests:
+            cpu: 50m
+            memory: 128Mi
+          limits:
+            cpu: 200m
+            memory: 256Mi
+        command: ["/bin/bash", "-c"]
+        args:
+        - |
+          set -euo pipefail
+          echo "Patching TektonConfig with Chains configuration..."
+          oc patch tektonconfig config --type=merge -p '{
+            "spec": {
+              "chain": {
+                "artifacts.taskrun.format": "{{ .Values.chains.artifacts.taskrun.format }}",
+                "artifacts.taskrun.storage": "{{ .Values.chains.artifacts.taskrun.storage }}",
+                "artifacts.taskrun.signer": "{{ .Values.chains.artifacts.taskrun.signer }}",
+                "artifacts.pipelinerun.format": "{{ .Values.chains.artifacts.pipelinerun.format }}",
+                "artifacts.pipelinerun.storage": "{{ .Values.chains.artifacts.pipelinerun.storage }}",
+                "artifacts.pipelinerun.signer": "{{ .Values.chains.artifacts.pipelinerun.signer }}",
+                "artifacts.pipelinerun.enable-deep-inspection": "{{ .Values.chains.artifacts.pipelinerun.enableDeepInspection }}",
+                "artifacts.oci.format": "{{ .Values.chains.artifacts.oci.format }}",
+                "artifacts.oci.storage": "{{ .Values.chains.artifacts.oci.storage }}",
+                "artifacts.oci.signer": "{{ .Values.chains.artifacts.oci.signer }}",
+                "transparency.enabled": "{{ .Values.chains.transparency.enabled }}",
+                "transparency.url": "https://rekor-server-trusted-artifact-signer.{{ .Values.global.hubClusterDomain }}",
+                "signers.x509.fulcio.enabled": "{{ .Values.chains.signers.x509.fulcio.enabled }}",
+                "signers.x509.fulcio.address": "https://fulcio-server-trusted-artifact-signer.{{ .Values.global.hubClusterDomain }}",
+                "signers.x509.fulcio.issuer": "https://spire-spiffe-oidc-discovery-provider.{{ .Values.global.hubClusterDomain }}",
+                "signers.x509.fulcio.provider": "{{ .Values.chains.signers.x509.fulcio.provider }}"
+                {{- if .Values.chains.signers.x509.tuf.enabled }},
+                "signers.x509.tuf.mirror.url": "https://tuf-trusted-artifact-signer.{{ .Values.global.hubClusterDomain }}"
+                {{- end }}
+              }
+            }
+          }'
+          echo "TektonConfig patched successfully."
+          oc get tektonconfig config -o jsonpath='{.spec.chain}' | python3 -m json.tool
+{{- end }}
diff --git a/charts/tekton-chains/values.yaml b/charts/tekton-chains/values.yaml
new file mode 100644
index 00000000..a32d4e35
--- /dev/null
+++ b/charts/tekton-chains/values.yaml
@@ -0,0 +1,34 @@
+# Tekton Chains Configuration for ZTVP
+# Configures the TektonConfig CR to enable Tekton Chains with RHTAS keyless signing
+
+global:
+  hubClusterDomain: apps.example.com
+
+chains:
+  enabled: true
+
+  artifacts:
+    taskrun:
+      format: in-toto
+      storage: oci
+      signer: x509
+    pipelinerun:
+      format: in-toto
+      storage: oci
+      signer: x509
+      enableDeepInspection: true
+    oci:
+      format: simplesigning
+      storage: oci
+      signer: x509
+
+  transparency:
+    enabled: true
+
+  signers:
+    x509:
+      fulcio:
+        enabled: true
+        provider: spiffe
+      tuf:
+        enabled: true
diff --git a/docs/SYNC-WAVE-INVENTORY.md b/docs/SYNC-WAVE-INVENTORY.md
index fa7a57c1..e2a47083 100644
--- a/docs/SYNC-WAVE-INVENTORY.md
+++ b/docs/SYNC-WAVE-INVENTORY.md
@@ -70,6 +70,8 @@ Every sync-wave in the repository, in order. **App** = hub-level Argo CD Applica
 | 46 | └ acs-central | chart | console-link |
 | 46 | └ acs-secured-cluster | chart | secured-cluster-cr |
 | 46 | └ rhtas-operator | chart | securesign |
+| 47 | tekton-chains | **App** | Tekton Chains config (RHTAS keyless signing) |
+| 47 | └ tekton-chains | chart | tektonconfig-chains (TektonConfig CR) |
 | 48 | supply-chain | **App** | |
 | 48+0 | └ supply-chain | chart | registry-image-namespace (Namespace, RBAC), pipeline-sa, tasks (incl. restart-qtodo), secrets (quay-pass, rhtpa-pass), quay-user, rhtas/rhtpa-config, pipeline-qtodo-restarter (Role+RoleBinding in qtodo ns) |
 | 48+1 | └ supply-chain | chart (hook) | enable-registry-default-route (Sync hook Job) |
@@ -112,6 +114,7 @@ Every sync-wave in the repository, in order. **App** = hub-level Argo CD Applica
 | trusted-profile-analyzer | 10 | 41 | Chart resources (OBC, DB, etc.) |
 | acs-secured-cluster | 15 | 46 | — |
 | trusted-artifact-signer | 15 | 46 | Deploy after dependencies |
+| tekton-chains | — | 47 | After RHTAS, before supply-chain (newly added) |
 | supply-chain | — | 48 | After RHTAS/ACS, before chart templates (newly added) |
 | acs-policies | 20 | 51 | After ACS Central + Secured Cluster |
 
@@ -209,6 +212,12 @@ Charts marked **(external)** have been externalized to standalone repositories m
 | --- | ---: | ---: |
 | securesign.yaml | 15 | 46 |
 
+### tekton-chains (`charts/tekton-chains/templates/`) — App wave: 47
+
+| Resource | Old | Current |
+| --- | ---: | ---: |
+| tektonconfig-chains.yaml | — | 47 |
+
 ### rhtpa-operator (`charts/rhtpa-operator/templates/`) — App wave: 41
 
 | Resource | Old | Current |
diff --git a/scripts/features/features.yaml b/scripts/features/features.yaml
index ee35f2cf..49ca349a 100644
--- a/scripts/features/features.yaml
+++ b/scripts/features/features.yaml
@@ -22,9 +22,13 @@ features:
     description: "OpenShift Pipelines"
     depends_on: []
 
+  tekton-chains:
+    description: "Tekton Chains with RHTAS keyless signing via SPIFFE"
+    depends_on: [pipelines, rhtas]
+
   supply-chain:
     description: "Full secure supply chain pipeline"
-    depends_on: [pipelines, rhtas, rhtpa, storage]
+    depends_on: [tekton-chains, rhtpa, storage]
     registry_option_required: true
     org: ztvp
     image_name: qtodo
diff --git a/scripts/features/quay.yaml b/scripts/features/quay.yaml
index bdb44f15..83abd6e9 100644
--- a/scripts/features/quay.yaml
+++ b/scripts/features/quay.yaml
@@ -25,3 +25,8 @@ clusterGroup:
       chartVersion: 0.1.*
       annotations:
         argocd.argoproj.io/sync-wave: "41"
+      overrides:
+      - name: job.image
+        value: "registry.redhat.io/openshift4/ose-cli:latest"
+      - name: job.resources.limits.memory
+        value: "512Mi"
diff --git a/scripts/features/registry/option-1-quay.yaml b/scripts/features/registry/option-1-quay.yaml
index ef499c06..487be3a8 100644
--- a/scripts/features/registry/option-1-quay.yaml
+++ b/scripts/features/registry/option-1-quay.yaml
@@ -41,6 +41,8 @@ clusterGroup:
       overrides:
         - name: job.image
           value: "registry.redhat.io/openshift4/ose-cli:latest"
+        - name: job.resources.limits.memory
+          value: "512Mi"
 
   merge_into_applications:
     supply-chain:
diff --git a/scripts/features/tekton-chains.yaml b/scripts/features/tekton-chains.yaml
new file mode 100644
index 00000000..5d1160cf
--- /dev/null
+++ b/scripts/features/tekton-chains.yaml
@@ -0,0 +1,11 @@
+# Tekton Chains for supply chain security with RHTAS keyless signing
+# Depends on: pipelines (OpenShift Pipelines operator), rhtas (RHTAS for Fulcio/Rekor/TUF)
+# Uses a PostSync Job to patch the operator-managed TektonConfig CR
+clusterGroup:
+  applications:
+    tekton-chains:
+      name: tekton-chains
+      project: hub
+      path: charts/tekton-chains
+      annotations:
+        argocd.argoproj.io/sync-wave: "47"
diff --git a/scripts/gen-feature-variants.md b/scripts/gen-feature-variants.md
index d084a79a..fe9235e9 100644
--- a/scripts/gen-feature-variants.md
+++ b/scripts/gen-feature-variants.md
@@ -48,6 +48,9 @@ python3 scripts/gen-feature-variants.py --features rhtpa
 # Enable multiple features
 python3 scripts/gen-feature-variants.py --features rhtpa,rhtas
 
+# Enable Tekton Chains (auto-resolves: pipelines -> rhtas -> tekton-chains)
+python3 scripts/gen-feature-variants.py --features tekton-chains
+
 # Full supply chain: pick a registry option (1, 2, or 3)
 python3 scripts/gen-feature-variants.py --features supply-chain --registry-option 1
 
diff --git a/values-hub.yaml b/values-hub.yaml
index dae08bf8..8b0a3360 100644
--- a/values-hub.yaml
+++ b/values-hub.yaml
@@ -401,6 +401,11 @@ clusterGroup:
     #   chartVersion: 0.1.*
     #   annotations:
     #     argocd.argoproj.io/sync-wave: "41"  # Deploy after NooBaa storage backend
+    #   overrides:
+    #   - name: job.image
+    #     value: "registry.redhat.io/openshift4/ose-cli:latest"
+    #   - name: job.resources.limits.memory
+    #     value: "512Mi"
     # RHTAS with SPIFFE Integration
     # COMMENTED OUT: Uncomment to enable RHTAS with SPIFFE and Email issuers
     # Depends on: Vault, SPIRE, Keycloak (for Email OIDC issuer if used)
@@ -546,6 +551,17 @@ clusterGroup:
         # before the supply-chain pipeline runs (avoids ImagePullBackOff on first install)
         # - name: app.seedImage.enabled
         #   value: "true"
+    # Tekton Chains - Configures Tekton Chains for supply chain security
+    # Requires: OpenShift Pipelines operator (openshift-pipelines subscription)
+    # Requires: RHTAS (trusted-artifact-signer) for keyless signing via SPIFFE
+    # Uses a PostSync Job to patch the operator-managed TektonConfig CR
+    # tekton-chains:
+    #   name: tekton-chains
+    #   project: hub
+    #   path: charts/tekton-chains
+    #   annotations:
+    #     argocd.argoproj.io/sync-wave: "47"
+    #
     # Secure Supply Chain - Uncomment to enable (required for Option 1, 2, or 3 registry flows in docs)
     # supply-chain:
     #  name: supply-chain