diff --git a/src/repo_registry/core/service.py b/src/repo_registry/core/service.py
index 5f4eea8..72888ba 100644
--- a/src/repo_registry/core/service.py
+++ b/src/repo_registry/core/service.py
@@ -322,6 +322,78 @@ class RegistryService:
         self.store.update_repository_status(repository_id, "reviewing")
         return self.store.get_candidate_graph(repository_id, analysis_run_id)
 
+    def relink_candidate_capability(
+        self,
+        repository_id: int,
+        analysis_run_id: int,
+        candidate_capability_id: int,
+        *,
+        target_ability_id: int,
+        notes: str = "",
+    ) -> CandidateGraph:
+        self.store.relink_candidate_capability(
+            repository_id,
+            analysis_run_id,
+            candidate_capability_id,
+            target_ability_id,
+        )
+        self.store.create_review_decision(
+            repository_id,
+            analysis_run_id,
+            action="relink_candidate_capability",
+            notes=notes,
+        )
+        self.store.update_repository_status(repository_id, "reviewing")
+        return self.store.get_candidate_graph(repository_id, analysis_run_id)
+
+    def relink_candidate_feature(
+        self,
+        repository_id: int,
+        analysis_run_id: int,
+        candidate_feature_id: int,
+        *,
+        target_capability_id: int,
+        notes: str = "",
+    ) -> CandidateGraph:
+        self.store.relink_candidate_feature(
+            repository_id,
+            analysis_run_id,
+            candidate_feature_id,
+            target_capability_id,
+        )
+        self.store.create_review_decision(
+            repository_id,
+            analysis_run_id,
+            action="relink_candidate_feature",
+            notes=notes,
+        )
+        self.store.update_repository_status(repository_id, "reviewing")
+        return self.store.get_candidate_graph(repository_id, analysis_run_id)
+
+    def relink_candidate_evidence(
+        self,
+        repository_id: int,
+        analysis_run_id: int,
+        candidate_evidence_id: int,
+        *,
+        target_capability_id: int,
+        notes: str = "",
+    ) -> CandidateGraph:
+        self.store.relink_candidate_evidence(
+            repository_id,
+            analysis_run_id,
+            candidate_evidence_id,
+            target_capability_id,
+        )
+        self.store.create_review_decision(
+            repository_id,
+            analysis_run_id,
+            action="relink_candidate_evidence",
+            notes=notes,
+        )
+        self.store.update_repository_status(repository_id, "reviewing")
+        return self.store.get_candidate_graph(repository_id, analysis_run_id)
+
     def add_ability(
         self,
         repository_id: int,
diff --git a/src/repo_registry/storage/sqlite.py b/src/repo_registry/storage/sqlite.py
index b2969e0..a9c80a2 100644
--- a/src/repo_registry/storage/sqlite.py
+++ b/src/repo_registry/storage/sqlite.py
@@ -576,6 +576,133 @@ class RegistryStore:
                 f"{repository_id} analysis run {analysis_run_id}"
             )
 
+    def relink_candidate_capability(
+        self,
+        repository_id: int,
+        analysis_run_id: int,
+        candidate_capability_id: int,
+        target_ability_id: int,
+    ) -> None:
+        self._ensure_candidate_row(
+            table="candidate_abilities",
+            label="target candidate ability",
+            repository_id=repository_id,
+            analysis_run_id=analysis_run_id,
+            candidate_id=target_ability_id,
+        )
+        with self.connect() as connection:
+            cursor = connection.execute(
+                """
+                UPDATE candidate_capabilities
+                SET ability_id = ?
+                WHERE id = ? AND repository_id = ? AND analysis_run_id = ?
+                """,
+                (
+                    target_ability_id,
+                    candidate_capability_id,
+                    repository_id,
+                    analysis_run_id,
+                ),
+            )
+        if cursor.rowcount == 0:
+            raise NotFoundError(
+                "candidate capability "
+                f"{candidate_capability_id} was not found for repository "
+                f"{repository_id} analysis run {analysis_run_id}"
+            )
+
+    def relink_candidate_feature(
+        self,
+        repository_id: int,
+        analysis_run_id: int,
+        candidate_feature_id: int,
+        target_capability_id: int,
+    ) -> None:
+        self._relink_candidate_leaf(
+            table="candidate_features",
+            label="candidate feature",
+            repository_id=repository_id,
+            analysis_run_id=analysis_run_id,
+            candidate_id=candidate_feature_id,
+            target_capability_id=target_capability_id,
+        )
+
+    def relink_candidate_evidence(
+        self,
+        repository_id: int,
+        analysis_run_id: int,
+        candidate_evidence_id: int,
+        target_capability_id: int,
+    ) -> None:
+        self._relink_candidate_leaf(
+            table="candidate_evidence",
+            label="candidate evidence",
+            repository_id=repository_id,
+            analysis_run_id=analysis_run_id,
+            candidate_id=candidate_evidence_id,
+            target_capability_id=target_capability_id,
+        )
+
+    def _ensure_candidate_row(
+        self,
+        *,
+        table: str,
+        label: str,
+        repository_id: int,
+        analysis_run_id: int,
+        candidate_id: int,
+    ) -> None:
+        with self.connect() as connection:
+            row = connection.execute(
+                f"""
+                SELECT id FROM {table}
+                WHERE id = ? AND repository_id = ? AND analysis_run_id = ?
+                """,
+                (candidate_id, repository_id, analysis_run_id),
+            ).fetchone()
+        if row is None:
+            raise NotFoundError(
+                f"{label} {candidate_id} was not found for repository "
+                f"{repository_id} analysis run {analysis_run_id}"
+            )
+
+    def _relink_candidate_leaf(
+        self,
+        *,
+        table: str,
+        label: str,
+        repository_id: int,
+        analysis_run_id: int,
+        candidate_id: int,
+        target_capability_id: int,
+    ) -> None:
+        self._ensure_candidate_row(
+            table="candidate_capabilities",
+            label="target candidate capability",
+            repository_id=repository_id,
+            analysis_run_id=analysis_run_id,
+            candidate_id=target_capability_id,
+        )
+        with self.connect() as connection:
+            cursor = connection.execute(
+                f"""
+                UPDATE {table}
+                SET capability_id = ?
+                WHERE id = ? AND repository_id = ? AND analysis_run_id = ?
+                """,
+                (
+                    target_capability_id,
+                    candidate_id,
+                    repository_id,
+                    analysis_run_id,
+                ),
+            )
+        if cursor.rowcount == 0:
+            raise NotFoundError(
+                f"{label} {candidate_id} was not found for repository "
+                f"{repository_id} analysis run {analysis_run_id}"
+            )
+
     def _reject_candidate_leaf(
         self,
         *,
diff --git a/src/repo_registry/web_api/app.py b/src/repo_registry/web_api/app.py
index 9f369d7..ca939ac 100644
--- a/src/repo_registry/web_api/app.py
+++ b/src/repo_registry/web_api/app.py
@@ -84,6 +84,16 @@ class CandidateEdit(BaseModel):
     notes: str = ""
 
 
+class CandidateCapabilityRelink(BaseModel):
+    target_ability_id: int
+    notes: str = ""
+
+
+class CandidateLeafRelink(BaseModel):
+    target_capability_id: int
+    notes: str = ""
+
+
 app = FastAPI(title="Repository Ability Registry", version="0.1.0")
 
 
@@ -344,6 +354,78 @@ def edit_candidate_capability(
         raise HTTPException(status_code=404, detail=str(exc)) from exc
 
 
+@app.post(
+    "/repos/{repository_id}/analysis-runs/{analysis_run_id}"
+    "/candidate-capabilities/{candidate_capability_id}/relink"
+)
+def relink_candidate_capability(
+    repository_id: int,
+    analysis_run_id: int,
+    candidate_capability_id: int,
+    payload: CandidateCapabilityRelink,
+    service: RegistryService = Depends(get_service),
+) -> dict[str, object]:
+    try:
+        return asdict(
+            service.relink_candidate_capability(
+                repository_id,
+                analysis_run_id,
+                candidate_capability_id,
+                **payload.model_dump(),
+            )
+        )
+    except NotFoundError as exc:
+        raise HTTPException(status_code=404, detail=str(exc)) from exc
+
+
+@app.post(
+    "/repos/{repository_id}/analysis-runs/{analysis_run_id}"
+    "/candidate-features/{candidate_feature_id}/relink"
+)
+def relink_candidate_feature(
+    repository_id: int,
+    analysis_run_id: int,
+    candidate_feature_id: int,
+    payload: CandidateLeafRelink,
+    service: RegistryService = Depends(get_service),
+) -> dict[str, object]:
+    try:
+        return asdict(
+            service.relink_candidate_feature(
+                repository_id,
+                analysis_run_id,
+                candidate_feature_id,
+                **payload.model_dump(),
+            )
+        )
+    except NotFoundError as exc:
+        raise HTTPException(status_code=404, detail=str(exc)) from exc
+
+
+@app.post(
+    "/repos/{repository_id}/analysis-runs/{analysis_run_id}"
+    "/candidate-evidence/{candidate_evidence_id}/relink"
+)
+def relink_candidate_evidence(
+    repository_id: int,
+    analysis_run_id: int,
+    candidate_evidence_id: int,
+    payload: CandidateLeafRelink,
+    service: RegistryService = Depends(get_service),
+) -> dict[str, object]:
+    try:
+        return asdict(
+            service.relink_candidate_evidence(
+                repository_id,
+                analysis_run_id,
+                candidate_evidence_id,
+                **payload.model_dump(),
+            )
+        )
+    except NotFoundError as exc:
+        raise HTTPException(status_code=404, detail=str(exc)) from exc
+
+
 @app.post("/repos/{repository_id}/abilities", status_code=201)
 def create_ability(
     repository_id: int,
diff --git a/src/repo_registry/web_ui/views.py b/src/repo_registry/web_ui/views.py
index 92cac0f..42e59ec 100644
--- a/src/repo_registry/web_ui/views.py
+++ b/src/repo_registry/web_ui/views.py
@@ -452,6 +452,78 @@ def edit_candidate_capability_from_form(
     )
 
 
+@router.post(
+    "/ui/repos/{repository_id}/analysis-runs/{analysis_run_id}"
+    "/candidate-capabilities/{candidate_capability_id}/relink"
+)
+def relink_candidate_capability_from_form(
+    repository_id: int,
+    analysis_run_id: int,
+    candidate_capability_id: int,
+    target_ability_id: int = Form(...),
+    service: RegistryService = Depends(get_service),
+) -> RedirectResponse:
+    service.relink_candidate_capability(
+        repository_id,
+        analysis_run_id,
+        candidate_capability_id,
+        target_ability_id=target_ability_id,
+        notes="Relinked from web UI",
+    )
+    return RedirectResponse(
+        f"/ui/repos/{repository_id}/analysis-runs/{analysis_run_id}",
+        status_code=303,
+    )
+
+
+@router.post(
+    "/ui/repos/{repository_id}/analysis-runs/{analysis_run_id}"
+    "/candidate-features/{candidate_feature_id}/relink"
+)
+def relink_candidate_feature_from_form(
+    repository_id: int,
+    analysis_run_id: int,
+    candidate_feature_id: int,
+    target_capability_id: int = Form(...),
+    service: RegistryService = Depends(get_service),
+) -> RedirectResponse:
+    service.relink_candidate_feature(
+        repository_id,
+        analysis_run_id,
+        candidate_feature_id,
+        target_capability_id=target_capability_id,
+        notes="Relinked from web UI",
+    )
+    return RedirectResponse(
+        f"/ui/repos/{repository_id}/analysis-runs/{analysis_run_id}",
+        status_code=303,
+    )
+
+
+@router.post(
+    "/ui/repos/{repository_id}/analysis-runs/{analysis_run_id}"
+    "/candidate-evidence/{candidate_evidence_id}/relink"
+)
+def relink_candidate_evidence_from_form(
+    repository_id: int,
+    analysis_run_id: int,
+    candidate_evidence_id: int,
+    target_capability_id: int = Form(...),
+    service: RegistryService = Depends(get_service),
+) -> RedirectResponse:
+    service.relink_candidate_evidence(
+        repository_id,
+        analysis_run_id,
+        candidate_evidence_id,
+        target_capability_id=target_capability_id,
+        notes="Relinked from web UI",
+    )
+    return RedirectResponse(
+        f"/ui/repos/{repository_id}/analysis-runs/{analysis_run_id}",
+        status_code=303,
+    )
+
+
 def render_candidate_graph(graph: dict, repository_id: int, analysis_run_id: int) -> str:
     abilities = graph.get("abilities", [])
     if not abilities:
@@ -541,6 +613,7 @@ def render_candidate_capability(
       {render_candidate_reject_form('candidate-capabilities', capability, repository_id, analysis_run_id)}
       <p class="muted">{escape(capability['description'])}</p>
       {render_candidate_edit_form('candidate-capabilities', capability, repository_id, analysis_run_id)}
+      {render_candidate_relink_form('candidate-capabilities', capability, repository_id, analysis_run_id, 'target_ability_id', 'Target ability ID')}
       {render_sources(capability['source_refs'])}
       <h3>Features</h3>
       <ul>{features or '<li class="muted">No feature candidates.</li>'}</ul>
@@ -562,6 +635,7 @@ def render_candidate_feature(
       <span class="pill">{escape(feature["type"])}</span>
       <span class="source">{escape(feature["location"])}</span>
       {render_candidate_reject_form('candidate-features', feature, repository_id, analysis_run_id)}
+      {render_candidate_relink_form('candidate-features', feature, repository_id, analysis_run_id, 'target_capability_id', 'Target capability ID')}
     </li>
     """
 
@@ -578,6 +652,7 @@ def render_candidate_evidence(
       <span class="pill">{escape(evidence["strength"])}</span>
       <span class="source">{escape(evidence["reference"])}</span>
       {render_candidate_reject_form('candidate-evidence', evidence, repository_id, analysis_run_id)}
+      {render_candidate_relink_form('candidate-evidence', evidence, repository_id, analysis_run_id, 'target_capability_id', 'Target capability ID')}
     </li>
     """
 
@@ -601,6 +676,28 @@ def render_candidate_reject_form(
     """
 
 
+def render_candidate_relink_form(
+    collection: str,
+    candidate: dict,
+    repository_id: int,
+    analysis_run_id: int,
+    field_name: str,
+    label: str,
+) -> str:
+    if candidate["status"] != "candidate":
+        return ""
+    action = (
+        f"/ui/repos/{repository_id}/analysis-runs/{analysis_run_id}"
+        f"/{collection}/{candidate['id']}/relink"
+    )
+    return f"""
+    <form style="display:inline-grid; grid-template-columns: 120px auto; gap: 6px; align-items: end;" method="post" action="{action}">
+      <label>{label}<input name="{field_name}" type="number" min="1" required></label>
+      <button class="secondary" type="submit">Relink</button>
+    </form>
+    """
+
+
 def render_ability_map(ability_map: dict) -> str:
     abilities = ability_map.get("abilities", [])
     if not abilities:
diff --git a/tests/test_registry_service.py b/tests/test_registry_service.py
index f987976..74cc08e 100644
--- a/tests/test_registry_service.py
+++ b/tests/test_registry_service.py
@@ -372,6 +372,114 @@ def test_reject_candidate_feature_and_evidence_excludes_only_those_leaves(tmp_pa
     assert len(approved_capability.evidence) == len(capability.evidence) - 1
 
 
+def test_relink_candidate_capability_to_another_ability_before_approval(tmp_path):
+    source = tmp_path / "repo"
+    source.mkdir()
+    (source / "README.md").write_text("# Relink Capability\n", encoding="utf-8")
+    (source / "app.py").write_text(
+        "from fastapi import FastAPI\n"
+        "app = FastAPI()\n"
+        '@app.get("/health")\n'
+        "def health():\n"
+        "    return {}\n",
+        encoding="utf-8",
+    )
+
+    service = make_service(tmp_path)
+    repository = service.register_repository(name="Relink Capability", url=str(source))
+    summary = service.analyze_repository(repository.id)
+    graph = service.candidate_graph(repository.id, summary.analysis_run.id)
+    capability = graph.abilities[0].capabilities[0]
+    with service.store.connect() as connection:
+        cursor = connection.execute(
+            """
+            INSERT INTO candidate_abilities
+              (repository_id, analysis_run_id, name, description, confidence)
+            VALUES (?, ?, ?, ?, ?)
+            """,
+            (
+                repository.id,
+                summary.analysis_run.id,
+                "Operations Visibility",
+                "Curator-created target ability.",
+                0.72,
+            ),
+        )
+        target_ability_id = int(cursor.lastrowid)
+
+    relinked_graph = service.relink_candidate_capability(
+        repository.id,
+        summary.analysis_run.id,
+        capability.id,
+        target_ability_id=target_ability_id,
+        notes="Move interface under the operational ability.",
+    )
+    ability_map = service.approve_candidate_graph(repository.id, summary.analysis_run.id)
+
+    target_candidate = [
+        ability for ability in relinked_graph.abilities if ability.id == target_ability_id
+    ][0]
+    assert target_candidate.capabilities[0].id == capability.id
+    approved_target = [
+        ability for ability in ability_map.abilities if ability.name == "Operations Visibility"
+    ][0]
+    assert approved_target.capabilities[0].name == capability.name
+
+
+def test_relink_candidate_feature_and_evidence_to_another_capability(tmp_path):
+    source = tmp_path / "repo"
+    source.mkdir()
+    (source / "README.md").write_text("# Relink Leaves\n", encoding="utf-8")
+    (source / "requirements.txt").write_text("fastapi\n", encoding="utf-8")
+    (source / "tests").mkdir()
+    (source / "tests" / "test_health.py").write_text(
+        "def test_health(): pass\n",
+        encoding="utf-8",
+    )
+    (source / "app.py").write_text(
+        "from fastapi import FastAPI\n"
+        "app = FastAPI()\n"
+        '@app.get("/health")\n'
+        "def health():\n"
+        "    return {}\n",
+        encoding="utf-8",
+    )
+
+    service = make_service(tmp_path)
+    repository = service.register_repository(name="Relink Leaves", url=str(source))
+    summary = service.analyze_repository(repository.id)
+    graph = service.candidate_graph(repository.id, summary.analysis_run.id)
+    source_capability = graph.abilities[0].capabilities[0]
+    target_capability = graph.abilities[0].capabilities[1]
+    feature = source_capability.features[0]
+    evidence = source_capability.evidence[0]
+
+    service.relink_candidate_feature(
+        repository.id,
+        summary.analysis_run.id,
+        feature.id,
+        target_capability_id=target_capability.id,
+    )
+    service.relink_candidate_evidence(
+        repository.id,
+        summary.analysis_run.id,
+        evidence.id,
+        target_capability_id=target_capability.id,
+    )
+    ability_map = service.approve_candidate_graph(repository.id, summary.analysis_run.id)
+
+    approved_capabilities = {
+        capability.name: capability for capability in ability_map.abilities[0].capabilities
+    }
+    assert approved_capabilities[source_capability.name].features == []
+    assert feature.name in {
+        item.name for item in approved_capabilities[target_capability.name].features
+    }
+    assert evidence.reference in {
+        item.reference for item in approved_capabilities[target_capability.name].evidence
+    }
+
+
 def test_analyze_repository_failure_is_recorded(tmp_path):
     service = make_service(tmp_path)
     repository = service.register_repository(
diff --git a/tests/test_web_api.py b/tests/test_web_api.py
index a652eaa..1a27857 100644
--- a/tests/test_web_api.py
+++ b/tests/test_web_api.py
@@ -371,3 +371,75 @@ def test_api_rejects_candidate_capability_feature_and_evidence(tmp_path):
         )
     finally:
         app.dependency_overrides.clear()
+
+
+def test_api_relinks_candidate_feature_and_evidence(tmp_path):
+    source = tmp_path / "repo"
+    source.mkdir()
+    (source / "README.md").write_text("# API Relink Leaves\n", encoding="utf-8")
+    (source / "requirements.txt").write_text("fastapi\n", encoding="utf-8")
+    (source / "tests").mkdir()
+    (source / "tests" / "test_status.py").write_text(
+        "def test_status(): pass\n",
+        encoding="utf-8",
+    )
+    (source / "app.py").write_text(
+        "from fastapi import FastAPI\n"
+        "app = FastAPI()\n"
+        '@app.get("/status")\n'
+        "def status():\n"
+        "    return {}\n",
+        encoding="utf-8",
+    )
+
+    def override_settings():
+        return Settings(
+            database_path=str(tmp_path / "api-relink.sqlite3"),
+            checkout_root=str(tmp_path / "api-relink-checkouts"),
+        )
+
+    app.dependency_overrides[get_settings] = override_settings
+    client = TestClient(app)
+    try:
+        repository_response = client.post(
+            "/repos",
+            json={"name": "API Relink Leaves", "url": str(source)},
+        )
+        repository_id = repository_response.json()["id"]
+        run_response = client.post(f"/repos/{repository_id}/analysis-runs", json={})
+        run_id = run_response.json()["analysis_run"]["id"]
+        graph_response = client.get(
+            f"/repos/{repository_id}/analysis-runs/{run_id}/candidate-graph"
+        )
+        capabilities = graph_response.json()["abilities"][0]["capabilities"]
+        source_capability = capabilities[0]
+        target_capability = capabilities[1]
+        feature_id = source_capability["features"][0]["id"]
+        evidence_id = source_capability["evidence"][0]["id"]
+
+        feature_response = client.post(
+            f"/repos/{repository_id}/analysis-runs/{run_id}"
+            f"/candidate-features/{feature_id}/relink",
+            json={
+                "target_capability_id": target_capability["id"],
+                "notes": "Move feature",
+            },
+        )
+        assert feature_response.status_code == 200
+        relinked_capabilities = feature_response.json()["abilities"][0]["capabilities"]
+        assert relinked_capabilities[0]["features"] == []
+        assert relinked_capabilities[1]["features"][0]["id"] == feature_id
+
+        evidence_response = client.post(
+            f"/repos/{repository_id}/analysis-runs/{run_id}"
+            f"/candidate-evidence/{evidence_id}/relink",
+            json={
+                "target_capability_id": target_capability["id"],
+                "notes": "Move evidence",
+            },
+        )
+        assert evidence_response.status_code == 200
+        relinked_capabilities = evidence_response.json()["abilities"][0]["capabilities"]
+        assert relinked_capabilities[1]["evidence"][0]["id"] == evidence_id
+    finally:
+        app.dependency_overrides.clear()