fix(pipeline): fetch issue name from Plane API on status-trigger start

issue.updated ships only the changed fields, so name was absent and the branch slug became feature/<id>-untitled. Add fetch_issue_fields (single issue-detail GET returning name+description, reusing the endpoint/token of fetch_issue_description) and pull the name above the slug build. Empty name still falls back to untitled.

src/plane_sync.py

@@ -197,6 +197,42 @@ def fetch_issue_description(issue_id: str, project_id: str) -> str:
         return ""
 
 
+def fetch_issue_fields(issue_id: str, project_id: str) -> tuple[str, str]:
+    """BUG B: GET the Plane issue by UUID ONCE and return (name, description).
+
+    Plane's ``issue.updated`` webhook (e.g. a status change) only carries the
+    CHANGED fields, so BOTH ``name`` and ``description`` are usually absent in
+    the payload. start_pipeline needs the real title (for the branch slug) and
+    the real description (for the analyst .task.md). To avoid issuing two
+    separate issue-detail GETs (one for name, one for description), this single
+    request returns both.
+
+    Reuses the exact GET issue detail endpoint / shared token already used by
+    ``fetch_issue_sequence_id`` / ``fetch_issue_description``. For the
+    description it applies the same logic as ``fetch_issue_description``
+    (prefer ``description_stripped``, fall back to stripping
+    ``description_html``).
+
+    Returns ("", "") on network error, non-2xx, or missing body - never raises,
+    so a Plane outage degrades gracefully (caller keeps its payload fallbacks).
+    """
+    url = f"{PLANE_BASE}/workspaces/{WORKSPACE}/projects/{project_id}/issues/{issue_id}/"
+    try:
+        resp = httpx.get(url, headers=PLANE_HEADERS, timeout=10)
+        resp.raise_for_status()
+        body = resp.json()
+        name = (body.get("name") or "").strip()
+        desc = body.get("description_stripped")
+        if desc and desc.strip():
+            description = desc
+        else:
+            description = _strip_html(body.get("description_html") or "")
+        return name, description
+    except Exception as e:
+        logger.warning(f"fetch_issue_fields failed for {issue_id}: {e}")
+        return "", ""
+
+
 def find_issue_id(work_item_id: str, project_id: str = None) -> str | None:
     """Find Plane issue UUID by work_item_id (e.g. 'ET-002')."""
     project_id = _resolve_project_id(work_item_id, project_id)

src/webhooks/plane.py

@@ -387,22 +387,35 @@ async def start_pipeline(data: dict, project_id: str = ""):
     repo = proj.repo
     plane_project_id = proj.plane_project_id
 
-    # BUG 1: Plane's issue.updated webhook (status change -> In Progress) sends
-    # only the CHANGED fields, so description / description_stripped are usually
-    # empty here even though the issue HAS a description. If the payload's
-    # description is missing/too short, pull the full one from the Plane issue
-    # detail API (same GET endpoint + shared token already used by
-    # fetch_issue_sequence_id) before QG-0 runs. If the API is also empty, QG-0
-    # legitimately fails (truly empty ticket).
-    if not description or len(description.strip()) < 20:
-        from ..plane_sync import fetch_issue_description
-        fetched = fetch_issue_description(plane_id, plane_project_id)
-        if fetched and len(fetched.strip()) >= len(description.strip()):
-            description = fetched
+    # BUG 1 + BUG B: Plane's issue.updated webhook (status change -> In Progress)
+    # sends only the CHANGED fields, so BOTH description / description_stripped
+    # AND name are usually empty here even though the issue HAS them. Pull the
+    # full title + description from the Plane issue detail API in a SINGLE GET
+    # (fetch_issue_fields: same endpoint + shared token already used by
+    # fetch_issue_sequence_id) before QG-0 and before the branch slug is built.
+    # If the API is also empty, QG-0 legitimately fails (truly empty ticket) and
+    # name falls back to "untitled".
+    name_missing = (not name) or name.strip().lower() == "untitled" or len(name.strip()) < 3
+    desc_missing = (not description) or len(description.strip()) < 20
+    if name_missing or desc_missing:
+        from ..plane_sync import fetch_issue_fields
+        fetched_name, fetched_desc = fetch_issue_fields(plane_id, plane_project_id)
+        if desc_missing and fetched_desc and len(fetched_desc.strip()) >= len(description.strip()):
+            description = fetched_desc
             logger.info(
                 f"start_pipeline: pulled description from Plane API for {plane_id} "
                 f"({len(description.strip())} chars)"
             )
+        if name_missing and fetched_name and len(fetched_name.strip()) >= 3:
+            name = fetched_name
+            logger.info(
+                f"start_pipeline: pulled name from Plane API for {plane_id} "
+                f"('{name}')"
+            )
+    # BUG B fallback: if name is still empty/blank after the API pull, keep the
+    # legacy "untitled" so the slug/branch build never crashes on an empty name.
+    if not name or not name.strip():
+        name = "untitled"
 
     # QG-0 validation (hard gate on pipeline start)
     errors = _qg0_errors(name, description)