diff --git a/registry/capabilities/capability.railiance.cluster-bootstrap.md b/registry/capabilities/capability.railiance.cluster-bootstrap.md
new file mode 100644
index 0000000..b1e3b8a
--- /dev/null
+++ b/registry/capabilities/capability.railiance.cluster-bootstrap.md
@@ -0,0 +1,122 @@
+---
+id: capability.railiance.cluster-bootstrap
+name: Railiance Cluster Runtime Bootstrap
+summary: 'Cluster runtime entry point of the Railiance Infrastructure-as-Code framework: from two bare
+  Linux servers, a Git repo, and credentials, rebuilds a fully automated Kubernetes-based environment.'
+owner: railiance-cluster
+status: draft
+domain: financials
+tags:
+- railiance
+- kubernetes
+- iac
+- bootstrap
+maturity:
+  discovery:
+    current: D3
+    target: D4
+    confidence: medium
+    rationale: README documents the 'Rails for Ops' convention-over-configuration philosophy and a concrete
+      quick-start (clone, from two bare servers rebuild a full k8s environment); has .forgejo CI already
+      in place.
+  availability:
+    current: A2
+    target: A3
+    confidence: medium
+    rationale: Real Python package (pyproject, requires-python >=3.11) plus bin/railiance CLI and ansible
+      playbooks (bootstrap/harden), with a documented quick-start path.
+external_evidence:
+  completeness:
+    level: C1
+    confidence: low
+    basis: scope_vs_intent_and_consumer_expectations
+    satisfied_expectations:
+    - documented quick-start from two bare servers to a running Kubernetes environment
+    - bootstrap/harden ansible playbooks
+    broken_expectations: []
+    out_of_scope_expectations: []
+  reliability:
+    level: R0
+    confidence: low
+    basis: consumer_quality_signals
+    known_reliability_risks:
+    - reproducibility claims not independently re-verified (no live bootstrap run during this sweep)
+discovery:
+  intent: 'Provide the cluster runtime entry point for Railiance: reproducible, self-reliant Kubernetes
+    environment bootstrap from bare servers via convention-over-configuration IaC.'
+  includes:
+  - cluster bootstrap CLI and ansible playbooks (bootstrap/harden)
+  - Kubernetes-based environment rebuild path
+  excludes:
+  - application workload deployment (see railiance-apps)
+  - platform services like Postgres/Valkey (see railiance-platform)
+  assumptions: []
+  use_cases: []
+  research_memos: []
+availability:
+  current_level: A2
+  target_level: A3
+  current_artifacts:
+  - '`railiance` CLI (bin/railiance)'
+  - ansible playbooks
+  target_artifacts: []
+  consumption_modes:
+  - cli
+  - ansible playbook
+relations:
+  depends_on: []
+  supports: []
+  related_to: []
+evidence:
+  documentation:
+  - README.md
+  tests:
+  - tests/
+  - .forgejo/
+  consumer_feedback: []
+  bug_reports: []
+  incidents: []
+consumer_guidance:
+  recommended_for:
+  - operators bootstrapping a new Railiance Kubernetes cluster from bare servers
+  not_recommended_for:
+  - application-level or platform-service deployment (see railiance-apps, railiance-platform)
+  known_limitations:
+  - reproducibility not independently re-verified via a live bootstrap run in this sweep
+promotion_history: []
+---
+
+# Railiance Cluster Runtime Bootstrap
+
+## Overview
+
+`railiance-cluster` is the cluster runtime entry point of the Railiance Infrastructure-as-Code framework: from two bare Linux servers, a Git repo, and credentials, it rebuilds a fully automated Kubernetes-based environment via convention-over-configuration IaC (Terraform/cloud-init/Ansible-adjacent tooling, `railiance` CLI).
+
+## Assessment notes
+
+### Discovery
+
+README documents the 'Rails for Ops' convention-over-configuration philosophy and a concrete quick-start (clone, from two bare servers rebuild a full k8s environment); has .forgejo CI already in place.
+
+### Availability
+
+Real Python package (pyproject, requires-python >=3.11) plus bin/railiance CLI and ansible playbooks (bootstrap/harden), with a documented quick-start path.
+
+### Completeness
+
+First-pass honest assessment from the REUSE-WP-0017 coverage campaign
+(reuse-surface). No external consumer feedback exists yet; levels reflect
+scope-vs-intent documentation quality, not internal code quality.
+
+### Reliability
+
+No production consumer telemetry exists yet; reliability level is
+intentionally conservative pending REUSE-WP-0019 reuse-telemetry evidence.
+
+## Promotion checklist
+
+- [x] ID follows `capability.<domain>.<name>` pattern
+- [x] Maturity enums match `specs/CapabilityMaturityStandard.md`
+- [x] `external_evidence` is populated separately from `maturity`
+- [ ] Relations reference valid capability IDs (none yet)
+- [x] Index entry added in `registry/indexes/capabilities.yaml`
diff --git a/registry/indexes/capabilities.yaml b/registry/indexes/capabilities.yaml
index f944e47..f235a35 100644
--- a/registry/indexes/capabilities.yaml
+++ b/registry/indexes/capabilities.yaml
@@ -1,4 +1,21 @@
 version: 1
-updated: '2026-06-16'
+updated: '2026-07-06'
 domain: helix_forge
-capabilities: []
+capabilities:
+- id: capability.railiance.cluster-bootstrap
+  name: Railiance Cluster Runtime Bootstrap
+  summary: 'Cluster runtime entry point of the Railiance Infrastructure-as-Code framework: from two bare
+    Linux servers, a Git repo, and credentials, rebuilds a fully automated Kubernetes-based environment.'
+  vector: D3 / A2 / C1 / R0
+  domain: financials
+  status: draft
+  owner: railiance-cluster
+  path: registry/capabilities/capability.railiance.cluster-bootstrap.md
+  tags:
+  - railiance
+  - kubernetes
+  - iac
+  - bootstrap
+  consumption_modes:
+  - cli
+  - ansible playbook