diff --git a/src/repo_registry/core/service.py b/src/repo_registry/core/service.py
index a0cf827..989793f 100644
--- a/src/repo_registry/core/service.py
+++ b/src/repo_registry/core/service.py
@@ -200,6 +200,62 @@ class RegistryService:
         self.store.update_repository_status(repository_id, "reviewing")
         return self.store.get_candidate_graph(repository_id, analysis_run_id)
 
+    def edit_candidate_ability(
+        self,
+        repository_id: int,
+        analysis_run_id: int,
+        candidate_ability_id: int,
+        *,
+        name: str,
+        description: str,
+        confidence: float,
+        notes: str = "",
+    ) -> CandidateGraph:
+        self.store.update_candidate_ability(
+            repository_id,
+            analysis_run_id,
+            candidate_ability_id,
+            name=name,
+            description=description,
+            confidence=confidence,
+        )
+        self.store.create_review_decision(
+            repository_id,
+            analysis_run_id,
+            action="edit_candidate_ability",
+            notes=notes,
+        )
+        self.store.update_repository_status(repository_id, "reviewing")
+        return self.store.get_candidate_graph(repository_id, analysis_run_id)
+
+    def edit_candidate_capability(
+        self,
+        repository_id: int,
+        analysis_run_id: int,
+        candidate_capability_id: int,
+        *,
+        name: str,
+        description: str,
+        confidence: float,
+        notes: str = "",
+    ) -> CandidateGraph:
+        self.store.update_candidate_capability(
+            repository_id,
+            analysis_run_id,
+            candidate_capability_id,
+            name=name,
+            description=description,
+            confidence=confidence,
+        )
+        self.store.create_review_decision(
+            repository_id,
+            analysis_run_id,
+            action="edit_candidate_capability",
+            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 0038d77..7118f9b 100644
--- a/src/repo_registry/storage/sqlite.py
+++ b/src/repo_registry/storage/sqlite.py
@@ -441,6 +441,72 @@ class RegistryStore:
                     (capability_id, repository_id, analysis_run_id),
                 )
 
+    def update_candidate_ability(
+        self,
+        repository_id: int,
+        analysis_run_id: int,
+        candidate_ability_id: int,
+        *,
+        name: str,
+        description: str,
+        confidence: float,
+    ) -> None:
+        with self.connect() as connection:
+            cursor = connection.execute(
+                """
+                UPDATE candidate_abilities
+                SET name = ?, description = ?, confidence = ?
+                WHERE id = ? AND repository_id = ? AND analysis_run_id = ?
+                """,
+                (
+                    name,
+                    description,
+                    confidence,
+                    candidate_ability_id,
+                    repository_id,
+                    analysis_run_id,
+                ),
+            )
+        if cursor.rowcount == 0:
+            raise NotFoundError(
+                "candidate ability "
+                f"{candidate_ability_id} was not found for repository "
+                f"{repository_id} analysis run {analysis_run_id}"
+            )
+
+    def update_candidate_capability(
+        self,
+        repository_id: int,
+        analysis_run_id: int,
+        candidate_capability_id: int,
+        *,
+        name: str,
+        description: str,
+        confidence: float,
+    ) -> None:
+        with self.connect() as connection:
+            cursor = connection.execute(
+                """
+                UPDATE candidate_capabilities
+                SET name = ?, description = ?, confidence = ?
+                WHERE id = ? AND repository_id = ? AND analysis_run_id = ?
+                """,
+                (
+                    name,
+                    description,
+                    confidence,
+                    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 create_review_decision(
         self,
         repository_id: int,
diff --git a/src/repo_registry/web_api/app.py b/src/repo_registry/web_api/app.py
index 1d25000..6071278 100644
--- a/src/repo_registry/web_api/app.py
+++ b/src/repo_registry/web_api/app.py
@@ -77,6 +77,13 @@ class CandidateRejection(BaseModel):
     notes: str = ""
 
 
+class CandidateEdit(BaseModel):
+    name: str
+    description: str = ""
+    confidence: float = Field(default=0.5, ge=0.0, le=1.0)
+    notes: str = ""
+
+
 app = FastAPI(title="Repository Ability Registry", version="0.1.0")
 
 
@@ -217,6 +224,54 @@ def reject_candidate_ability(
         raise HTTPException(status_code=404, detail=str(exc)) from exc
 
 
+@app.patch(
+    "/repos/{repository_id}/analysis-runs/{analysis_run_id}"
+    "/candidate-abilities/{candidate_ability_id}"
+)
+def edit_candidate_ability(
+    repository_id: int,
+    analysis_run_id: int,
+    candidate_ability_id: int,
+    payload: CandidateEdit,
+    service: RegistryService = Depends(get_service),
+) -> dict[str, object]:
+    try:
+        return asdict(
+            service.edit_candidate_ability(
+                repository_id,
+                analysis_run_id,
+                candidate_ability_id,
+                **payload.model_dump(),
+            )
+        )
+    except NotFoundError as exc:
+        raise HTTPException(status_code=404, detail=str(exc)) from exc
+
+
+@app.patch(
+    "/repos/{repository_id}/analysis-runs/{analysis_run_id}"
+    "/candidate-capabilities/{candidate_capability_id}"
+)
+def edit_candidate_capability(
+    repository_id: int,
+    analysis_run_id: int,
+    candidate_capability_id: int,
+    payload: CandidateEdit,
+    service: RegistryService = Depends(get_service),
+) -> dict[str, object]:
+    try:
+        return asdict(
+            service.edit_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}/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 9618d2c..3bdfbf3 100644
--- a/src/repo_registry/web_ui/views.py
+++ b/src/repo_registry/web_ui/views.py
@@ -330,13 +330,72 @@ def reject_candidate_ability_from_form(
     )
 
 
+@router.post(
+    "/ui/repos/{repository_id}/analysis-runs/{analysis_run_id}"
+    "/candidate-abilities/{candidate_ability_id}/edit"
+)
+def edit_candidate_ability_from_form(
+    repository_id: int,
+    analysis_run_id: int,
+    candidate_ability_id: int,
+    name: str = Form(...),
+    description: str = Form(""),
+    confidence: float = Form(...),
+    service: RegistryService = Depends(get_service),
+) -> RedirectResponse:
+    service.edit_candidate_ability(
+        repository_id,
+        analysis_run_id,
+        candidate_ability_id,
+        name=name,
+        description=description,
+        confidence=confidence,
+        notes="Edited 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-capabilities/{candidate_capability_id}/edit"
+)
+def edit_candidate_capability_from_form(
+    repository_id: int,
+    analysis_run_id: int,
+    candidate_capability_id: int,
+    name: str = Form(...),
+    description: str = Form(""),
+    confidence: float = Form(...),
+    service: RegistryService = Depends(get_service),
+) -> RedirectResponse:
+    service.edit_candidate_capability(
+        repository_id,
+        analysis_run_id,
+        candidate_capability_id,
+        name=name,
+        description=description,
+        confidence=confidence,
+        notes="Edited 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:
         return '<p class="muted">No candidates generated.</p>'
     items = []
     for ability in abilities:
-        capabilities = "".join(render_candidate_capability(capability) for capability in ability["capabilities"])
+        capabilities = "".join(
+            render_candidate_capability(capability, repository_id, analysis_run_id)
+            for capability in ability["capabilities"]
+        )
         items.append(
             f"""
             <li>
@@ -345,6 +404,7 @@ def render_candidate_graph(graph: dict, repository_id: int, analysis_run_id: int
               <span class="pill">{ability['confidence']:.2f}</span>
               {render_candidate_ability_actions(ability, repository_id, analysis_run_id)}
               <p class="muted">{escape(ability['description'])}</p>
+              {render_candidate_edit_form('candidate-abilities', ability, repository_id, analysis_run_id)}
               {render_sources(ability['source_refs'])}
               <ul>{capabilities}</ul>
             </li>
@@ -371,7 +431,34 @@ def render_candidate_ability_actions(
     """
 
 
-def render_candidate_capability(capability: dict) -> str:
+def render_candidate_edit_form(
+    collection: str,
+    candidate: dict,
+    repository_id: int,
+    analysis_run_id: int,
+) -> str:
+    if candidate["status"] != "candidate":
+        return ""
+    action = (
+        f"/ui/repos/{repository_id}/analysis-runs/{analysis_run_id}"
+        f"/{collection}/{candidate['id']}/edit"
+    )
+    confidence = f"{candidate['confidence']:.2f}"
+    return f"""
+    <form class="stack" method="post" action="{action}">
+      <label>Name <input name="name" value="{escape(candidate['name'])}" required></label>
+      <label>Description <textarea name="description" rows="2">{escape(candidate['description'])}</textarea></label>
+      <label>Confidence <input name="confidence" type="number" min="0" max="1" step="0.01" value="{confidence}" required></label>
+      <button class="secondary" type="submit">Save Edit</button>
+    </form>
+    """
+
+
+def render_candidate_capability(
+    capability: dict,
+    repository_id: int,
+    analysis_run_id: int,
+) -> str:
     features = "".join(
         f'<li>{escape(feature["name"])} <span class="pill">{escape(feature["type"])}</span> <span class="source">{escape(feature["location"])}</span></li>'
         for feature in capability["features"]
@@ -386,6 +473,7 @@ def render_candidate_capability(capability: dict) -> str:
       <span class="pill">{escape(capability['status'])}</span>
       <span class="pill">{capability['confidence']:.2f}</span>
       <p class="muted">{escape(capability['description'])}</p>
+      {render_candidate_edit_form('candidate-capabilities', capability, repository_id, analysis_run_id)}
       {render_sources(capability['source_refs'])}
       <h3>Features</h3>
       <ul>{features or '<li class="muted">No feature candidates.</li>'}</ul>
diff --git a/tests/test_registry_service.py b/tests/test_registry_service.py
index 5669f57..6185868 100644
--- a/tests/test_registry_service.py
+++ b/tests/test_registry_service.py
@@ -243,6 +243,56 @@ def test_reject_candidate_ability_excludes_it_from_approval(tmp_path):
     assert ability_map.abilities == []
 
 
+def test_edit_candidate_graph_values_before_approval(tmp_path):
+    source = tmp_path / "repo"
+    source.mkdir()
+    (source / "README.md").write_text("# Editable\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="Editable", url=str(source))
+    summary = service.analyze_repository(repository.id)
+    graph = service.candidate_graph(repository.id, summary.analysis_run.id)
+    candidate_ability = graph.abilities[0]
+    candidate_capability = candidate_ability.capabilities[0]
+
+    service.edit_candidate_ability(
+        repository.id,
+        summary.analysis_run.id,
+        candidate_ability.id,
+        name="Service Health Monitoring",
+        description="Expose health state for operational monitoring.",
+        confidence=0.91,
+        notes="Curator renamed the generic ability.",
+    )
+    service.edit_candidate_capability(
+        repository.id,
+        summary.analysis_run.id,
+        candidate_capability.id,
+        name="Report HTTP Health",
+        description="Return a lightweight health response over HTTP.",
+        confidence=0.87,
+    )
+
+    ability_map = service.approve_candidate_graph(repository.id, summary.analysis_run.id)
+
+    assert service.get_repository(repository.id).status == "indexed"
+    assert ability_map.abilities[0].name == "Service Health Monitoring"
+    assert ability_map.abilities[0].description == (
+        "Expose health state for operational monitoring."
+    )
+    assert ability_map.abilities[0].confidence == 0.91
+    assert ability_map.abilities[0].capabilities[0].name == "Report HTTP Health"
+    assert ability_map.abilities[0].capabilities[0].confidence == 0.87
+
+
 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 d37526f..e432161 100644
--- a/tests/test_web_api.py
+++ b/tests/test_web_api.py
@@ -139,6 +139,7 @@ def test_api_analysis_run_loop(tmp_path):
             "Review Frontend Repository Usefulness"
         )
         candidate_ability_id = candidate_graph["abilities"][0]["id"]
+        candidate_capability_id = candidate_graph["abilities"][0]["capabilities"][0]["id"]
 
         reject_response = client.post(
             f"/repos/{repository_id}/analysis-runs/"
@@ -152,6 +153,41 @@ def test_api_analysis_run_loop(tmp_path):
         run_response = client.post(f"/repos/{repository_id}/analysis-runs", json={})
         assert run_response.status_code == 201
         run = run_response.json()
+        candidate_response = client.get(
+            f"/repos/{repository_id}/analysis-runs/"
+            f"{run['analysis_run']['id']}/candidate-graph"
+        )
+        candidate_graph = candidate_response.json()
+        candidate_ability_id = candidate_graph["abilities"][0]["id"]
+        candidate_capability_id = candidate_graph["abilities"][0]["capabilities"][0]["id"]
+
+        ability_edit_response = client.patch(
+            f"/repos/{repository_id}/analysis-runs/"
+            f"{run['analysis_run']['id']}/candidate-abilities/"
+            f"{candidate_ability_id}",
+            json={
+                "name": "Frontend Delivery",
+                "description": "Serve a browser frontend.",
+                "confidence": 0.9,
+                "notes": "API edit test",
+            },
+        )
+        assert ability_edit_response.status_code == 200
+        assert ability_edit_response.json()["abilities"][0]["name"] == (
+            "Frontend Delivery"
+        )
+
+        capability_edit_response = client.patch(
+            f"/repos/{repository_id}/analysis-runs/"
+            f"{run['analysis_run']['id']}/candidate-capabilities/"
+            f"{candidate_capability_id}",
+            json={
+                "name": "Describe Frontend Stack",
+                "description": "Capture React and Vite usage.",
+                "confidence": 0.8,
+            },
+        )
+        assert capability_edit_response.status_code == 200
 
         approve_response = client.post(
             f"/repos/{repository_id}/analysis-runs/"
@@ -161,11 +197,12 @@ def test_api_analysis_run_loop(tmp_path):
         assert approve_response.status_code == 200
         ability_map = approve_response.json()
         assert ability_map["repository"]["status"] == "indexed"
-        assert ability_map["abilities"][0]["name"] == (
-            "Review Frontend Repository Usefulness"
+        assert ability_map["abilities"][0]["name"] == "Frontend Delivery"
+        assert ability_map["abilities"][0]["capabilities"][0]["name"] == (
+            "Describe Frontend Stack"
         )
 
-        search_response = client.get("/search", params={"q": "structure"})
+        search_response = client.get("/search", params={"q": "frontend"})
         assert search_response.status_code == 200
         assert search_response.json()