DSH terminal client

Key features

• Per-session Agent Presets for tools, prompt sections, skills, compaction, plan mode, and delegation
• /new, /resume, --continue, and explicit session identifiers without remounting Ink
• One-shot tool approval bar for sandbox escalation and hook ask decisions
• Append-only settled transcript with bounded mutable streaming output
• Live slash-command and skill discovery from shared Harness registries