docs(skills): clarify service-mode selector guidance in add-connector

The skill said service mode requires shared selectors, but GitLab (service
mode only) uses plain host/project inputs. Align with the live-search README:
verification is mandatory; shared selectors apply only to resource pickers.

Author: waleedlatif1

.agents/skills/add-connector/SKILL.md

@@ -8,7 +8,7 @@ argument-hint: <service-name> [api-docs-url]
 
 ## Choose the connector runtime first
 
-For **Sim Search**, use the live provider workflow in [the federated Search developer guide](../../../apps/sim/lib/sim-search/live/README.md#adding-a-live-search-connector). Its browser-safe provider catalog owns provider IDs, API origins, credential aliases, and account modes; its typed runtime registry requires both search and read handlers. `ConnectorMeta` remains the owner of logos and setup fields. Member mode has no admin resource filters. Service mode requires independent live source verification and shared selectors. Do not implement a Search source by adding a crawler, embeddings, or a scheduled ACL build.
+For **Sim Search**, use the live provider workflow in [the federated Search developer guide](../../../apps/sim/lib/sim-search/live/README.md#adding-a-live-search-connector). Its browser-safe provider catalog owns provider IDs, API origins, credential aliases, and account modes; its typed runtime registry requires both search and read handlers. `ConnectorMeta` remains the owner of logos and setup fields. Member mode has no admin resource filters. Service mode requires independent live source verification; resource pickers use shared selectors with canonical manual-input pairs, and plain inputs are fine where no picker applies. Do not implement a Search source by adding a crawler, embeddings, or a scheduled ACL build.
 
 The ingestion instructions below apply to **ordinary knowledge-base connectors** and the explicit legacy Search backend (`SIM_SEARCH_LIVE=false`). If a provider supports both, implement and test both runtimes; adding `search: true` to metadata alone does not implement federated search. Preserve indexing documentation and behavior for those KB/legacy callers.