diff --git a/history/2026-06-17-sibling-registry-established.md b/history/2026-06-17-sibling-registry-established.md
new file mode 100644
index 0000000..69ab6bc
--- /dev/null
+++ b/history/2026-06-17-sibling-registry-established.md
@@ -0,0 +1,29 @@
+# Sibling capability registries established
+
+**Date:** 2026-06-17  
+**Method:** `reuse-surface establish --scaffold` + entry migration from reuse-surface by `owner`
+
+## Repos bootstrapped
+
+| Repo | Capabilities | Commit | Raw URL status |
+|---|---|---|---|
+| `state-hub` | 2 | `70df013` | HTTP 200 |
+| `feature-control` | 3 | `82c7884` | HTTP 200 |
+| `identity-canon` | 2 | `c66bebc` | HTTP 200 |
+| `shard-wiki` | 8 | `b31e9bc` | HTTP 200 |
+
+Entries were copied from `reuse-surface/registry/capabilities/` where `owner` matched the
+sibling repo slug. All repos passed `reuse-surface validate --root <repo>`.
+
+## Federation
+
+- Local `registry/federation/sources.yaml` — sibling `index` sources enabled
+- `reuse-surface federation compose` — 35 capabilities (15 duplicate IDs warned across
+  reuse-surface + shard-wiki/wiki entries still present in both indexes)
+- Production hub `https://reuse.coulomb.social` — registered all four siblings;
+  `GET /v1/federated` returned **27** capabilities across **5** repos
+
+## Follow-up
+
+- Deduplicate wiki capabilities still listed in reuse-surface index vs shard-wiki canonical index
+- Remove migrated entries from reuse-surface index when owners agree on single source of truth
\ No newline at end of file
diff --git a/history/README.md b/history/README.md
index 93ca3ad..d7c9d80 100644
--- a/history/README.md
+++ b/history/README.md
@@ -7,4 +7,5 @@ in `INTENT.md`; living delta tracking in `docs/IntentScopeGapAnalysis.md`.
 | Date | Artifact | Summary |
 |---|---|---|
 | 2026-06-15 | [2026-06-15-intent-scope-assessment.md](2026-06-15-intent-scope-assessment.md) | Post-WP-0011 INTENT↔SCOPE assessment; priorities 18–23 |
-| 2026-06-16 | [2026-06-16-hub-registration-blocks.md](2026-06-16-hub-registration-blocks.md) | Sibling hub registration blocks; raw URL probe evidence |
\ No newline at end of file
+| 2026-06-16 | [2026-06-16-hub-registration-blocks.md](2026-06-16-hub-registration-blocks.md) | Sibling hub registration blocks; raw URL probe evidence |
+| 2026-06-17 | [2026-06-17-sibling-registry-established.md](2026-06-17-sibling-registry-established.md) | establish --scaffold + hub registration for four siblings |
\ No newline at end of file
diff --git a/registry/federation/sources.yaml b/registry/federation/sources.yaml
index 7803bd4..bdf3b27 100644
--- a/registry/federation/sources.yaml
+++ b/registry/federation/sources.yaml
@@ -1,51 +1,40 @@
-# Federation manifest for helix_forge capability indexes.
-# Compose with: reuse-surface federation compose
 version: 1
 domain: helix_forge
 collision_policy: warn
-
 sources:
-  - repo: reuse-surface
-    index: registry/indexes/capabilities.yaml
-    enabled: true
-    required: true
-    domain: helix_forge
-    description: Primary local capability registry
-
-  # Enable when sibling repos publish registry/indexes/capabilities.yaml
-  - repo: state-hub
-    index: ~/state-hub/registry/indexes/capabilities.yaml
-    enabled: true
-    required: false
-    domain: helix_forge
-    description: State Hub coordination capabilities
-
-  - repo: feature-control
-    index: ~/feature-control/registry/indexes/capabilities.yaml
-    enabled: true
-    required: false
-    domain: helix_forge
-    description: Feature control domain capabilities
-
-  - repo: identity-canon
-    index: ~/identity-canon/registry/indexes/capabilities.yaml
-    enabled: true
-    required: false
-    domain: helix_forge
-    description: Identity canon research capabilities
-
-  - repo: shard-wiki
-    index: ~/shard-wiki/registry/indexes/capabilities.yaml
-    enabled: true
-    required: false
-    domain: helix_forge
-    description: Shard wiki federation capabilities
-
-  # Remote index example — enable when a repo publishes a raw capabilities.yaml URL
-  - repo: example-remote
-    url: https://example.com/registry/indexes/capabilities.yaml
-    enabled: false
-    required: false
-    domain: helix_forge
-    cache_ttl_seconds: 86400
-    description: Illustrative HTTP federation source (disabled)
\ No newline at end of file
+- repo: feature-control
+  url: https://gitea.coulomb.social/coulomb/feature-control/raw/main/registry/indexes/capabilities.yaml
+  enabled: true
+  required: false
+  domain: helix_forge
+  cache_ttl_seconds: 86400
+  auth_header: Authorization
+- repo: identity-canon
+  url: https://gitea.coulomb.social/coulomb/identity-canon/raw/main/registry/indexes/capabilities.yaml
+  enabled: true
+  required: false
+  domain: helix_forge
+  cache_ttl_seconds: 86400
+  auth_header: Authorization
+- repo: reuse-surface
+  url: https://gitea.coulomb.social/coulomb/reuse-surface/raw/main/registry/indexes/capabilities.yaml
+  enabled: true
+  required: false
+  domain: helix_forge
+  description: Capability registry for helix_forge
+  cache_ttl_seconds: 86400
+  auth_header: Authorization
+- repo: shard-wiki
+  url: https://gitea.coulomb.social/coulomb/shard-wiki/raw/main/registry/indexes/capabilities.yaml
+  enabled: true
+  required: false
+  domain: helix_forge
+  cache_ttl_seconds: 86400
+  auth_header: Authorization
+- repo: state-hub
+  url: https://gitea.coulomb.social/coulomb/state-hub/raw/main/registry/indexes/capabilities.yaml
+  enabled: true
+  required: false
+  domain: helix_forge
+  cache_ttl_seconds: 86400
+  auth_header: Authorization