The terminal and history pagination both treated the model-visible surface as the human transcript. A landed compaction replacement therefore erased the conversation it summarized — messages the reader had already seen — and a model-only replacement copy consumed a page's `maxMessages` quota, which could also split a compaction's provenance from the replacement citing it. `dsh-session` now exports the marker split `isAppendSurfaceEvent` / `isReplacementSurfaceEvent`. The terminal replays append-origin surface events, keeps a shadowed step's tool cards paired through its append-origin assistant message, and renders one dim marker where a compaction landed; the checkpoint is recognized through the compaction seam's `isCompactCheckpointSource` contract, not the shape of the replacement. `session.history` counts only append-origin human messages. Everything model-facing keeps reading `session.surface`.
host/ — web-GUI host half
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The host side of the dsh web GUI: the API gateway every client shape shares, and the plain HTTP server it rides on. The browser side lives in client/; the composed application is apps/cli serving apps/web. All product packages.
| Package | Role | ctx key |
|---|---|---|
apiproxy/ |
The shared API gateway: the zero-Node TS wire contract (src/api/), the fetch carrier pair (toFetchHandler host-side, AbstractApiClient client-side), and the host implementation over ctx.agents/ctx.workspace |
ctx.apiProxy |
webserver/ |
Plain HTTP route-registration carrier: node:http server listening on activation; routes register as named exact/prefix handlers |
ctx.httpServer |
directory-picker/ |
Workspace-directory picking seam: discriminated native/browse capability the gateway's picker RPCs delegate to |
ctx.directoryPicker |
directory-picker-native/ |
Dual-face native interaction: OS-chooser backend (osascript / PowerShell / Zenity+KDialog, host-display only) + the browser half filling ui-workspace's directory-flow slots | (registers ctx.directoryPicker) |
directory-picker-browse/ |
Dual-face browse interaction: listing/creation primitives over Node stdlib (remote-capable) + the browser half rendering the in-app Select Workspace Directory dialog | (registers ctx.directoryPicker) |
apiproxy is transport-agnostic by design — it registers no routes; carriers wrap ctx.apiProxy themselves. The HTTP carrier route (with its /api browser-trust fence) is mounted by client/connection's node half, which is why that package lives in the client group: it owns both ends of the wire.