Persistent multi-model proxy

Key features

• Persistent multi-model agent squads for DeepSeek Harness.
• Durable agents, squads, immutable squad revisions, run history, per-session selection, and optional per-project defaults through dsh storage-domain.
• Give every member its own model and tool policy, save reusable teams in Settings, then select a squad beside the composer and keep chatting normally.
• Settings forms, quick-start templates, safe merge/replace import preview, cloning, revision restore, and a model-route diagnostic for global agents and squads.
• In the default Guaranteed mode, ordinary Send runs the squad at the host boundary before the lead model answers