test: prove repository navigation conformance

Assistant: codex
Assistant-Model: gpt-5.6-sol
Assistant-Session: 01a0230c-b06c-7641-808a-e191b6d1da49

hub_core/contracts/repository_navigation/v1_0_0/README.md

@@ -9,7 +9,8 @@ classification projections:
   repository, facet, provenance, diagnostic, cursor, and legacy-alias output;
 - `openapi/repository-navigation.openapi.json` defines the read-only
   `port.projection.query` routes;
-- `fixtures/` supplies a valid full input page and its representative output;
+- `fixtures/` supplies valid full and incremental/delete input pages plus a
+  representative derived output;
 - `compatibility-matrix.json` records the only accepted input version and the
   temporary State Hub topic adapter.
 

hub_core/contracts/repository_navigation/v1_0_0/fixtures/repository-classification-incremental.json

@@ -0,0 +1,52 @@
+{
+  "contract_id": "helixforge.repository-classification-projection",
+  "contract_version": "1.0.0",
+  "source": {
+    "system": "repo-manager",
+    "classification_contract_id": "RMGR-CONTRACT-CLASSIFICATION-0001",
+    "classification_contract_version": "1.0",
+    "producer_version": "0.4.0"
+  },
+  "snapshot": {
+    "snapshot_id": "eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee",
+    "mode": "incremental",
+    "generated_at": "2026-08-22T12:05:00Z",
+    "source_revision": "123456789abcdef0123456789abcdef012345678",
+    "page_cursor": null,
+    "next_cursor": null,
+    "final_page": true,
+    "total_repository_count": null
+  },
+  "repositories": [
+    {
+      "operation": "delete",
+      "repository_id": "11111111-1111-4111-8111-111111111111",
+      "slug": "hub-core",
+      "revision": {
+        "head_sha": "1111111111111111111111111111111111111111",
+        "source_fingerprint": "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb",
+        "observed_at": "2026-08-22T12:04:00Z"
+      }
+    },
+    {
+      "operation": "upsert",
+      "repository_id": "33333333-3333-4333-8333-333333333333",
+      "slug": "classification-catalog",
+      "lifecycle": "active",
+      "classification": {
+        "category": "product",
+        "domain": "infotech",
+        "secondary_domains": [],
+        "capability_tags": ["repository-governance"],
+        "business_stake": ["operations", "technology"],
+        "business_mechanics": ["control", "coordination"]
+      },
+      "revision": {
+        "head_sha": "3333333333333333333333333333333333333333",
+        "source_fingerprint": "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
+        "observed_at": "2026-08-22T12:04:30Z"
+      }
+    }
+  ],
+  "diagnostics": []
+}