The native macOS cockpit for the sild stack: a libghostty terminal as the permanent center (your operator — pi/claude/codex — runs here), the observe/steer sidebar of rooms on the left, and a shared right dock for the selected room's detail or an open artifact. The kild engine's REST/WS API is the ONLY backend contract; artifacts are read from the filesystem (~/.prp/<key>/). helm knows both prp and kild — they never know helm or each other.

Status: libghostty spike — see docs/SPIKE.md.

• swift run helm (or make run) — fast SPM iteration loop; no bundle, no signing.
• make app — the real Helm.app bundle via XcodeGen (project.yml → Helm.xcodeproj → xcodebuild; needs xcodegen). The target echoes the built .app path.
• make build / make test / make clean — SPM build, tests, and cleanup.

Both paths build the same sources against the same pinned libghostty-spm (exact 1.3.1 in Package.swift AND project.yml — keep them in lockstep). The sidebar needs the kild engine on localhost:4517; the terminal pane is a real GhosttyKit surface via libghostty-spm — no toolchain needed, SPM fetches the prebuilt xcframework.

Seed plan: docs/ui-plan.md (inherited from the kild cockpit era; the three 2026-07-24 addenda are the current direction).