feat(computer): SSH computer selection + status + workspace default (handoff #2)

Mirrors the cwd/workspace UI for the SSH-computer feature:

- New feature library src/features/computer/:
  - logic/view-model.ts (pure): viewComputer/viewComputerStatus/viewTestResult/
    summarizeComputers/formatHost/knownHostLabel + state->badge for the 4
    ComputerStatusResponse states + SaveComputer/LoadComputerStatus/
    TestComputer/LoadComputers ports. 20 view-model tests.
  - ui/ComputerField.svelte: per-conversation selector (dropdown +
    connection-status badge + Test-connection, polling the selected alias).
  - ui/ComputerSelect.svelte: reusable Local/computers dropdown, shared with
    the workspace default-computer control.
- AppStore: computerId state + refreshComputer (at every focus site, parallel
  to refreshCwd) + setComputer (PUT /conversations/:id/computer, null=clear) +
  global computers catalog (GET /computers on boot, like models) +
  computerStatus(alias) + testComputer(alias). chat.send UNCHANGED (resolved
  server-side like cwd).
- App.svelte: ComputerField in the Model sidebar view next to CwdField; adapted
  ports wrap the store.
- workspaces: setDefaultComputer on WorkspaceHttp+WorkspaceStore
  (PUT /workspaces/:id/default-computer); default-computer selector in
  WorkspaceCard (reuses ComputerSelect); router passes store.computers through.
- Re-mirrored .dispatch/transport-contract.reference.md (Computers section +
  ChatRequest.computerId); updated .dispatch/wire.reference.md (Computer/
  ComputerEntry/defaultComputerId + the provider-retry divergence note from
  handoff #1); GLOSSARY + backend-handoff.md (handoff #2, §2e).

Transparency invariant: the computer is USER-facing only (a tool-execution
target, never part of the model prompt); the agent never sees it.

Verify: 795/795 tests green; biome clean; vite build succeeds; 0 typecheck
errors from the computer feature. (11 pre-existing svelte-check errors remain
from the open §2d provider-retry divergence — backend feature/ssh-support
still lacks TurnProviderRetryEvent; not from this feature.)

18 files changed, 1224 insertions, 21 deletions

diff --git a/.dispatch/transport-contract.reference.md b/.dispatch/transport-contract.reference.md
index 8c6023a..48ba45d 100644
--- a/.dispatch/transport-contract.reference.md
+++ b/.dispatch/transport-contract.reference.md
@@ -5,9 +5,20 @@
 > permission prompt). Your CODE still imports `@dispatch/transport-contract` normally — this file is for
 > READING only.
 >
-> **Orchestrator:** SNAPSHOT of `[email protected]` (MCP status). Regenerate whenever
+> **Orchestrator:** SNAPSHOT of `[email protected]` (MCP status + computers). Regenerate whenever
 > it changes.
 >
+> **2026-06-25 delta (SSH handoff #2 — ADDITIVE to `[email protected]`, NO version bump):** adds the
+> computer HTTP API types: `ComputerListResponse` (`GET /computers`), `ComputerResponse` (`GET /computers/:alias`),
+> `ComputerStatusResponse` (`GET /computers/:alias/status`), `TestComputerResponse` (`POST /computers/:alias/test`),
+> `SetConversationComputerRequest` + `ConversationComputerResponse`
+> (`GET`/`PUT`/`DELETE /conversations/:id/computer`), `SetWorkspaceDefaultComputerRequest`
+> (`PUT /workspaces/:id/default-computer`). Also `computerId?: string` on `ChatRequest`/`ChatSendMessage`/
+> `QueueRequest` (per-turn override; resolved server-side from the persisted per-conversation value in the MVP, so
+> `chat.send` need not send it). `Computer`/`ComputerEntry` themselves are `@dispatch/wire` types. See
+> `backend-handoff.md` §2e. (The `ssh` extension that provides the ComputerService is the last backend wave —
+> until it lands, `GET /computers` returns `[]` and statuses return `disconnected`.)
+>
 > **2026-06-24 delta (MCP status handoff — package bumped `0.18.0` → `0.22.0`, ADDITIVE):** adds
 > `McpServerState`, `McpServerInfo`, and `McpStatusResponse`; endpoint
 > `GET /conversations/:id/mcp`. Mirrors the existing `GET /conversations/:id/lsp` shape (returns
@@ -117,6 +128,16 @@ export interface ChatRequest {
 	 * defaultCwd = null).
 	 */
 	readonly workspaceId?: string;
+
+	/**
+	 * The computer to run this turn's tools on — an SSH config `Host` alias
+	 * (one of the `alias` values returned by `GET /computers`). Omit to inherit
+	 * the resolved chain: per-conversation `computerId` → the workspace's
+	 * `defaultComputerId` → `null`/local (today's behavior). Like `cwd`, this is
+	 * a per-turn tool-execution target forwarded to tools and never part of the
+	 * model prompt (so it does not affect prompt caching). Mirrors `cwd`.
+	 */
+	readonly computerId?: string;
 }
 
 /**
@@ -843,5 +864,82 @@ export interface DeleteWorkspaceResponse {
 	/** Conversations that were closed (status → "closed") by this delete. */
 	readonly closedCount: number;
 }
+
+// ─── Computers (SSH handoff #2) ─────────────────────────────────────────────
+
+/**
+ * Response of `GET /computers` — every remote computer discovered from the
+ * system's `~/.ssh/config`, sorted by `alias`. Parallel to
+ * `WorkspaceListResponse`: each entry is a `ComputerEntry` (a `Computer` plus a
+ * usage count). There is no Computer CRUD — to add one, the user adds a `Host`
+ * block to `~/.ssh/config` and Dispatch discovers it on the next read.
+ */
+export interface ComputerListResponse {
+	readonly computers: readonly ComputerEntry[];
+}
+
+/**
+ * Response of `GET /computers/:alias` — a single computer. Parallel to
+ * `WorkspaceResponse` (the entity itself). `alias` is the `computerId` users
+ * select; the remaining fields are resolved from the SSH config.
+ */
+export interface ComputerResponse extends Computer {}
+
+/**
+ * Response of `GET /computers/:alias/status` — the live connection state of a
+ * computer (whether Dispatch currently holds an open SSH session to it). Drives
+ * the frontend connection indicator. `error` is present only when
+ * `state === "error"`; `knownHost` mirrors the read-only `Computer` field.
+ */
+export interface ComputerStatusResponse {
+	readonly alias: string;
+	readonly state: "disconnected" | "connecting" | "connected" | "error";
+	readonly error?: string;
+	readonly knownHost: boolean;
+}
+
+/**
+ * Body of `PUT /conversations/:id/computer` — set or clear the conversation's
+ * persisted computer selection (the computer analog of `SetCwdRequest`). Pass
+ * `null` to clear → the conversation inherits the workspace's
+ * `defaultComputerId`, then `null`/local. An unknown alias is not validated here
+ * (the connection resolves at turn time; an unreachable host → turn error, not
+ * a 400). Mirrors the cwd/model PUT clear semantics.
+ */
+export interface SetConversationComputerRequest {
+	readonly computerId: string | null;
+}
+
+/**
+ * Response of `GET /conversations/:id/computer`. `computerId` is the persisted
+ * SSH `Host` alias, or `null` when never set (the conversation then inherits
+ * the workspace default → local). Parallel to `CwdResponse`.
+ */
+export interface ConversationComputerResponse {
+	readonly conversationId: string;
+	readonly computerId: string | null;
+}
+
+/**
+ * Body of `PUT /workspaces/:id/default-computer` — set or clear the workspace's
+ * default computer (the computer analog of `SetWorkspaceDefaultCwdRequest`).
+ * `null` means local (no SSH). Conversations in the workspace with no
+ * `computerId` of their own inherit this.
+ */
+export interface SetWorkspaceDefaultComputerRequest {
+	readonly computerId: string | null;
+}
+
+/**
+ * Response of `POST /computers/:alias/test` — the result of a one-shot
+ * connectivity probe (Dispatch opens an SSH connection to the alias, runs a
+ * trivial command, then closes). `ok` is true on success; `error` carries the
+ * failure reason (e.g. auth refused, host unreachable) when `ok` is false.
+ */
+export interface TestComputerResponse {
+	readonly alias: string;
+	readonly ok: boolean;
+	readonly error?: string;
+}
 ```
 
diff --git a/.dispatch/wire.reference.md b/.dispatch/wire.reference.md
index b7003ec..05ed40b 100644
--- a/.dispatch/wire.reference.md
+++ b/.dispatch/wire.reference.md
@@ -4,13 +4,30 @@
 > types WITHOUT following the `file:` dep symlink out of this repo (which hangs on a permission
 > prompt). Your CODE still imports `@dispatch/wire` normally — this file is for READING only.
 >
-> **Orchestrator:** SNAPSHOT of `[email protected]` (workspaces). Regenerate whenever `@dispatch/wire` changes.
+> **Orchestrator:** SNAPSHOT of `[email protected]` (workspaces + computers). Regenerate whenever `@dispatch/wire` changes.
 >
 > **2026-06-23 delta (workspaces handoff — package bumped `0.11.0` → `0.12.0`, ADDITIVE):** adds
 > `Workspace` + `WorkspaceEntry` (a list entry with a conversation count) and a required
 > `workspaceId: string` on `ConversationMeta` (`"default"` for legacy/unspecified conversations). A
 > workspace is a URL-driven grouping of conversations that owns a default cwd; conversations that
 > haven't set their own cwd inherit `workspace.defaultCwd`. See `backend-handoff-workspaces-reply.md`.
+>
+> **2026-06-25 delta (SSH handoff #1 — ADDITIVE to `[email protected]`, NO version bump):** adds a REQUIRED
+> `defaultComputerId: string | null` on `Workspace` (null = local / no SSH; the computer analog of
+> `defaultCwd`) and two new read-only view types: `Computer` (a discovered `~/.ssh/config` `Host` alias)
+> and `ComputerEntry extends Computer` (a list entry with a `usageCount`). `alias` IS the `computerId`
+> users select (persisted per-conversation/per-workspace like cwd). The full HTTP API surface
+> (`GET /computers`, `PUT /conversations/:id/computer`, `PUT /workspaces/:id/default-computer`,
+> `GET /computers/:alias/status`, `chat.send computerId`) comes in a LATER handoff — NOT consumed yet.
+>
+> **⚠️ CROSS-REPO DIVERGENCE (2026-06-25, BLOCKING FE typecheck):** the backend `feature/ssh-support`
+> branch (where the SSH types landed) was cut from `8a74335` and is MISSING the `TurnProviderRetryEvent` /
+> `provider-retry` `AgentEvent` addition that is on `dev` (and which the FE already consumes — see §2c of
+> `backend-handoff.md`). The mirror below KEEPS `TurnProviderRetryEvent` (it is the FE's expected contract
+> and matches `dev`); it is marked where it appears. Until the backend merges `dev` into
+> `feature/ssh-support`, the FE pinned to the `feature/ssh-support` wire will NOT typecheck (11 errors,
+> all the missing `provider-retry` seam). The SSH `Computer`/`defaultComputerId` types ARE present on
+> `feature/ssh-support` and are consumed below.
 
 ```ts
 /**
@@ -288,7 +305,7 @@ export type AgentEvent =
 	| TurnUsageEvent
 	| TurnStepCompleteEvent
 	| TurnErrorEvent
-	| TurnProviderRetryEvent
+	| TurnProviderRetryEvent // ⚠️ divergent: present on `dev`, MISSING on the pinned `feature/ssh-support` wire (see header + backend-handoff.md §2c)
 	| TurnDoneEvent
 	| TurnSealedEvent
 	| TurnSteeringEvent;
@@ -611,6 +628,14 @@ export interface Workspace {
 	readonly title: string;
 	/** The workspace's default cwd, or `null` (fall through to server default). */
 	readonly defaultCwd: string | null;
+	/**
+	 * The workspace's default computer — an SSH config `Host` alias that
+	 * conversations in this workspace inherit when they set no `computerId` of
+	 * their own. `null` means local (no SSH; today's behavior). The computer
+	 * analog of `defaultCwd`. Resolved per-conversation by `getEffectiveComputer`
+	 * (per-conv `computerId` → this → `null`/local).
+	 */
+	readonly defaultComputerId: string | null;
 	/** Epoch-ms when the workspace was first created. */
 	readonly createdAt: number;
 	/** Epoch-ms of the most recent conversation activity in this workspace. */
@@ -625,4 +650,45 @@ export interface WorkspaceEntry extends Workspace {
 	/** Number of conversations assigned to this workspace. */
 	readonly conversationCount: number;
 }
+
+// ─── Computers ───────────────────────────────────────────────────────────────
+
+/**
+ * A read-only view of a remote computer discovered from the system's
+ * `~/.ssh/config` — a "computer" is a `Host` alias, NOT an editable entity
+ * (there is no Computer CRUD store). To add a computer, the user adds a `Host`
+ * block to `~/.ssh/config`; Dispatch discovers it on the next `listComputers()`
+ * read. Every field below is resolved from the config (first-match-wins for
+ * `HostName`/`User`/`Port`/`IdentityFile`).
+ *
+ * `alias` is the `computerId` users select — the string persisted per
+ * conversation and per workspace (the computer analog of `cwd`). `knownHost`
+ * drives the frontend "known/new" indicator and is read-only.
+ */
+export interface Computer {
+	/** The SSH config `Host` alias — also the `computerId` users select. */
+	readonly alias: string;
+	/** Resolved `HostName`/IP from the config (falls back to the alias itself). */
+	readonly hostName: string;
+	/** Resolved port (config `Port`, default 22). */
+	readonly port: number;
+	/** Resolved user (config `User`, default the current user). */
+	readonly user: string;
+	/** Resolved `IdentityFile` path (from the config, or `null` = default `~/.ssh/id_*`). */
+	readonly identityFile: string | null;
+	/**
+	 * Whether the host's key is already in `~/.ssh/known_hosts` (i.e. previously
+	 * connected). Drives the frontend "known/new" indicator. Read-only.
+	 */
+	readonly knownHost: boolean;
+}
+
+/**
+ * A computer entry in the list response (`GET /computers`) — a `Computer` plus
+ * a usage count. Parallel to `WorkspaceEntry`.
+ */
+export interface ComputerEntry extends Computer {
+	/** Number of conversations/workspaces whose `computerId` resolves to this alias. */
+	readonly usageCount: number;
+}
 ```
diff --git a/GLOSSARY.md b/GLOSSARY.md
index fe4360c..7914ef5 100644
--- a/GLOSSARY.md
+++ b/GLOSSARY.md
@@ -24,6 +24,8 @@
 | **context window** | The model's MAXIMUM token capacity (the limit a **context size** is measured against). A FUTURE backend field — not on the wire yet. **Placeholder:** the composer status bar currently HARDCODES a `1,000,000`-token window for the `size / limit · pct%` readout + fill bar; swap to the real per-model value when the backend ships it (see `backend-handoff.md` §3). | max context, token limit (distinct from **context size**, the current usage) |
 | **message queue** | A per-conversation buffer of user messages awaiting mid-turn **steering** delivery (owned by the `message-queue` backend extension). Transient + in-memory; exposed to the FE as a per-conversation **surface** (`message-queue`, scope `conversation`; one `custom` field, `rendererId: "message-queue"`, `payload: QueuePayload`). NOT on the chat stream — it is control/state. Enqueued via `chat.queue` (WS) or `POST /conversations/:id/queue` (HTTP); auto-starts a turn if idle. `[email protected]`. | pending messages, steering queue |
 | **steering** | A user message injected into an in-flight turn at the tool-result boundary (drawn from the **message queue**): the model sees it alongside the tool results and may adjust course. Emitted on the chat stream as a `steering` `AgentEvent` (`TurnSteeringEvent`); the queue surface clears on drain (move, don't duplicate). If the turn ends with a non-empty queue (no tool call fired), the queue carries into a NEW turn as its opening prompt (no `steering` event). `[email protected]`. | mid-turn injection, course correction, interruption |
+| **computer** | A remote SSH target discovered from the system's `~/.ssh/config` — a read-only VIEW, NOT an editable entity (no CRUD store; to add one the user edits `~/.ssh/config`). Backend-canonical (`[email protected]`, additive). On the wire as `Computer` (`{ alias, hostName, port, user, identityFile, knownHost }`) + `ComputerEntry extends Computer` (adds `usageCount`, for `GET /computers`). `alias` IS the **computerId** — the string persisted per-conversation / per-workspace (the computer analog of `cwd`). Resolution is SERVER-owned (never re-implement): per-conversation `computerId` → `workspace.defaultComputerId` → `null`/local. USER-facing only: a tool-execution target forwarded to tools, NEVER part of the model prompt (does not affect prompt caching); the agent never sees it. HTTP API (`GET /computers`, `GET`/`PUT /conversations/:id/computer`, `PUT /workspaces/:id/default-computer`, `GET /computers/:alias/status`, `POST /computers/:alias/test`) consumed in handoff #2. | ssh host, remote host, server, connection target |
+| **computerId** | The string id of a **computer** — an SSH config `Host` alias users select. Persisted per-conversation and per-workspace (the computer analog of `cwd`/`workspaceId`). `null` means local (no SSH; today's behavior). On `Workspace` as the REQUIRED `defaultComputerId: string \| null` (null = local / no SSH; the computer analog of `defaultCwd`); per-conversation persistence via `GET`/`PUT`/`DELETE /conversations/:id/computer`. `chat.send` need not send it (resolved server-side from the persisted per-conversation value in the MVP). | ssh alias, host id, remote id |
 
 ## Frontend-specific
 | Term | Meaning | Aliases to avoid |
diff --git a/backend-handoff.md b/backend-handoff.md
index c82d9cb..cf09269 100644
--- a/backend-handoff.md
+++ b/backend-handoff.md
@@ -5,16 +5,19 @@
 > **From:** dispatch-web orchestrator · **To:** `../dispatch-backend` orchestrator · **Courier:** the user.
 > `lsp` does NOT span the repos (AGENTS.md § Backend seam) — every cross-repo ask flows through here.
 
-_Last updated: 2026-06-24 (`transport-contract` re-pinned 0.20.0 → 0.22.0; `file:` dep paths
-fixed `../arch-rewrite` → `../dispatch-backend`; MCP server-status endpoint/types consumed + backend shipped
-`GET /conversations/:id/mcp` (CR-12 resolved); transient `provider-retry` AgentEvent consumed (additive to
-`[email protected]`, no version bump))._
+_Last updated: 2026-06-25 (SSH handoff #2 — full computer HTTP API consumed: `computer` feature folder + `ComputerField`
+per-conversation selector + connection-status badge + Test-connection + workspace default-computer selector; store
+`computerId`/`refreshComputer`/`setComputer` + `computers` catalog + `computerStatus`/`testComputer`. transport-contract
+computer types re-mirrored. ⚠️ The handoff #1 `provider-retry` divergence (§2d) is STILL OPEN — backend `feature/ssh-support`
+still lacks `TurnProviderRetryEvent` (not merged from `dev`); FE typecheck stays at 11 errors, all that seam. The computer
+feature itself is typecheck-clean (0 errors) + 795 tests green. See §2e)._
 **FE is current on `[email protected]` / `[email protected]` / `[email protected]`.** Open asks: **CR-9**
-(`system:os` should detect WSL + include Linux distro — backend behavior change, no contract bump).
+(`system:os` should detect WSL + include Linux distro — backend behavior change, no contract bump), and **SSH-divergence**
+(§2d — backend `feature/ssh-support` must merge `dev` so `provider-retry` is present alongside the new SSH types).
 Backend shipped CR-10 (workspace id on `conversation.open` / `conversation.statusChanged`), CR-11
 (per-conversation model persistence), and CR-12 (`GET /conversations/:id/mcp`); FE has consumed all three.
 The backend also added the transient `provider-retry` `AgentEvent` (retry-with-backoff warning) to
-`[email protected]` (additive — no version bump); FE consumed + re-mirrored `.dispatch/wire.reference.md` — see §2c.
+`[email protected]` on `dev` (additive — no version bump); FE consumed + re-mirrored `.dispatch/wire.reference.md` — see §2c.
 FE re-pinned + re-mirrored `transport-contract`; `selectModel` persists to
 `PUT /conversations/:id/model` and conversation focus recalls the persisted model via `GET /conversations/:id/model`.
 FE consumes the MCP status slice (`GET /conversations/:id/mcp`, mirroring `/lsp`) — see §2b.
@@ -28,7 +31,7 @@ Pinned as `file:` deps: **`[email protected]`; `[email protected]`; `transport-contrac
 | Package | Used for |
 |---|---|
 | `@dispatch/ui-contract` | surfaces + surface WS protocol |
-| `@dispatch/wire` | `Chunk`/`StoredChunk`(+`seq`)/`ChatMessage`/`AgentEvent`/`TurnSealedEvent`/`TurnProviderRetryEvent`(transient retry-warning)/`Usage`/`StepId` + metrics: `StepMetrics`/`TurnMetrics`, `usage.stepId`, `step-complete`, `done.durationMs`/`done.usage`, `tool-result.durationMs`, `done.contextSize`/`TurnMetrics.contextSize`, `ReasoningEffort`, `QueuedMessage`/`QueuePayload`/`TurnSteeringEvent`, `ConversationMeta`/`ConversationStatus` |
+| `@dispatch/wire` | `Chunk`/`StoredChunk`(+`seq`)/`ChatMessage`/`AgentEvent`/`TurnSealedEvent`/`TurnProviderRetryEvent`(transient retry-warning)/`Usage`/`StepId` + metrics: `StepMetrics`/`TurnMetrics`, `usage.stepId`, `step-complete`, `done.durationMs`/`done.usage`, `tool-result.durationMs`, `done.contextSize`/`TurnMetrics.contextSize`, `ReasoningEffort`, `QueuedMessage`/`QueuePayload`/`TurnSteeringEvent`, `ConversationMeta`/`ConversationStatus`, `Workspace`/`WorkspaceEntry`(+`defaultComputerId`)/`Computer`/`ComputerEntry` (SSH handoff #1) |
 | `@dispatch/transport-contract` | `ChatRequest`(+`reasoningEffort`)/`ModelsResponse`/`ConversationHistoryResponse`/`ConversationMetricsResponse` + `WarmRequest`/`WarmResponse` + `CwdResponse`/`SetCwdRequest` + `ReasoningEffortResponse`/`SetReasoningEffortRequest` + `QueueRequest`/`QueueResponse`/`ChatQueueMessage` + `ConversationOpenMessage`/`ConversationStatusChangedMessage`/`ConversationListResponse`/`LastMessageResponse`/`OpenConversationResponse`/`SetTitleRequest`/`TitleResponse` + LSP (`LspStatusResponse`/`LspServerInfo`/`LspServerState`) + MCP (`McpStatusResponse`/`McpServerInfo`/`McpServerState`) + WS chat ops + `WsClientMessage`/`WsServerMessage` |
 
 Endpoints in use (HTTP **24203**, WS **24205**, CORS `*` incl. `PUT`):
@@ -346,6 +349,112 @@ effect + re-render churn). A live ticking countdown (5,4,3,2,1…) could be adde
 
 ---
 
+## 2d. SSH support — handoff #1 (wire types) → **PARTIALLY CONSUMED ✅ ⚠️ BLOCKED on a cross-repo divergence**
+
+The first of a few incremental SSH handoffs. The backend's `@dispatch/wire` (pinned `file:` dep) gained SSH-computer
+types — **additive to `[email protected]`, NO version bump** (same pattern as `provider-retry`). The full HTTP API surface
+(computer endpoints, `chat.send computerId`) comes in a LATER handoff; this one is wire-types only.
+
+**New wire types (consumed + re-mirrored):**
+- `Workspace` gained a REQUIRED `defaultComputerId: string | null` (null = local / no SSH; the computer analog of
+  `defaultCwd`). Resolution is SERVER-owned (per-conv `computerId` → `workspace.defaultComputerId` → `null`/local).
+- `Computer` — a read-only view of a discovered `~/.ssh/config` `Host` target:
+  `{ alias, hostName, port, user, identityFile, knownHost }`. `alias` IS the `computerId` users select. NOT an
+  editable entity (no CRUD store — the user edits `~/.ssh/config` to add one).
+- `ComputerEntry extends Computer` — adds `usageCount` (for `GET /computers`).
+
+**FE (DONE):**
+- Re-synced the `@dispatch/wire` `file:` dep (worktree layout note below) so the new types resolve.
+- Re-mirrored `.dispatch/wire.reference.md`: added `Workspace.defaultComputerId`, the `Computer`/`ComputerEntry`
+  section, and a header delta note.
+- Fixed the 2 `Workspace`/`WorkspaceEntry` test literals that broke (the handoff's expected break):
+  `src/features/workspaces/ui/WorkspaceCard.test.ts` (`fakeEntry`) and
+  `src/features/workspaces/logic/view-model.test.ts` (`ws` factory) — both now supply `defaultComputerId: null`.
+  (The conformance test's `provider-retry` case is the unrelated divergence below — NOT a `defaultComputerId` site.)
+- Added `computer` / `computerId` to `GLOSSARY.md` (backend-canonical, adopted verbatim).
+
+**NOT started (correctly deferred):** the `computer` feature folder, the per-conversation + workspace-default
+selectors, the connection-status badge, and `chat.send computerId` — all wait on the later HTTP-API handoff.
+
+### ⚠️ BLOCKING — `provider-retry` missing on the backend `feature/ssh-support` branch
+
+Picking up the SSH wire types surfaced a **cross-repo divergence**: the FE does NOT typecheck. The backend
+`feature/ssh-support` branch (where the SSH types landed) was cut from `8a74335` and is MISSING the
+`TurnProviderRetryEvent` / `provider-retry` `AgentEvent` addition that lives on `dev` (confirmed: present in the main
+backend repo's `dev` `packages/wire/src/index.ts` lines 276/444; ABSENT from the worktree `feature/ssh-support`
+branch source + `dist`). The FE branch already consumes `provider-retry` (commit `17ce479`, §2c) — so against the
+pinned `feature/ssh-support` wire it now fails with **11 typecheck errors**, all the missing `provider-retry` seam:
+`Module '"@dispatch/wire"' has no exported member 'TurnProviderRetryEvent'` (7 sites:
+`core/chunks/types.ts`, `retry-banner.ts`, `selectors.ts`, `features/chat/store.svelte.ts`,
+`features/chat/ui/ChatView.svelte`, `core/chunks/reducer.test.ts`, `retry-banner.test.ts`) +
+`Type '"provider-retry"' is not comparable/assignable to the AgentEvent.type union` (4 sites:
+`core/chunks/reducer.ts`, `core/wire/conformance.ts`, `core/wire/conformance.test.ts`).
+
+**This is backend-side.** The FE will NOT revert its shipped, tested `provider-retry` feature (that would regress
+§2c), and per the constitution the FE cannot edit the backend repo. **Ask for the backend:** merge `dev` into
+`feature/ssh-support` (or rebase the SSH waves 0–2 onto current `dev`) so `provider-retry` is present alongside the
+new SSH types. Once merged + the wire `dist` rebuilt, the FE re-syncs the `file:` dep and the 11 errors clear with
+ZERO further FE code changes (the `provider-retry` consumption is already complete + tested on the FE side).
+
+**FE status:** `defaultComputerId` break fully resolved (0 remaining); the ONLY thing blocking `bun run typecheck`
+green is the backend `provider-retry` merge. `bun run test` / `build` are likewise blocked on the same compile seam.
+
+### Worktree environment note (not a contract change)
+This worktree lays the repos out as `…/worktrees/ssh-support/{backend,frontend}`, but `package.json`'s canonical
+`file:` paths point at `../dispatch-backend` (correct for the main `dispatch/{dispatch-backend,dispatch-web}` layout).
+To keep `package.json` canonical (no worktree-specific hack committed), a symlink `../dispatch-backend → ../backend`
+was created in the worktree parent (untracked, outside the repo), then `bun install` re-synced `node_modules/@dispatch/*`.
+The backend wire `dist/` was already built + current (has the new types); no backend edit was made.
+
+---
+
+## 2e. SSH support — handoff #2 (full computer HTTP API) → **CONSUMED ✅ (FE built; typecheck blocked only by §2d)**
+
+The backend shipped the full SSH computer HTTP/WS API (transport-contract types stable; the `ssh` extension that
+provides the ComputerService is the last backend wave — until it lands, `GET /computers` returns `[]` and statuses
+return `disconnected`, which the FE renders gracefully). The FE mirrors the existing `cwd`/`workspaces` UI.
+
+**New transport-contract types consumed (additive to `[email protected]`, NO version bump):** `ComputerListResponse`
+(`GET /computers`), `ComputerResponse`, `ComputerStatusResponse` (`GET /computers/:alias/status`), `TestComputerResponse`
+(`POST /computers/:alias/test`), `SetConversationComputerRequest` + `ConversationComputerResponse`
+(`GET`/`PUT`/`DELETE /conversations/:id/computer`), `SetWorkspaceDefaultComputerRequest`
+(`PUT /workspaces/:id/default-computer`), and `computerId?: string` on `ChatRequest`/`ChatSendMessage`/`QueueRequest`.
+`Computer`/`ComputerEntry` are `@dispatch/wire` (handoff #1). Re-mirrored `.dispatch/transport-contract.reference.md`
+(added the Computers section + `ChatRequest.computerId`).
+
+**FE (DONE — mirrors cwd-lsp's consumer-defines-port pattern):**
+- New feature library `src/features/computer/`: pure `logic/view-model.ts` (`viewComputer`/`viewComputerStatus`/
+  `viewTestResult`/`summarizeComputers`/`formatHost`/`knownHostLabel` + state→badge mapping for the 4
+  `ComputerStatusResponse.state`s + the `SaveComputer`/`LoadComputerStatus`/`TestComputer`/`LoadComputers` ports) — 20
+  view-model tests green; `ui/ComputerField.svelte` (per-conversation selector: dropdown + connection-status badge +
+  Test-connection, polling the selected alias) + `ui/ComputerSelect.svelte` (a reusable Local/computers dropdown, shared
+  with the workspace default-computer control); `index.ts` (`ComputerField`/`ComputerSelect`/`manifest`/types).
+- `AppStore` (`src/app/store.svelte.ts`): `computerId` reactive state + `refreshComputer()` (parallel to `refreshCwd`,
+  called at every focus site: boot, workspace switch, draft→tab, newDraft, selectTab, removeTabLocally) +
+  `setComputer(computerId: string | null)` (`PUT /conversations/:id/computer`, null = clear) + a global `computers`
+  catalog (`GET /computers` on boot, like `models`) + `computerStatus(alias)` + `testComputer(alias)`. New result types
+  `ComputerResult`/`ComputerStatusResult`/`TestComputerResult`. `chat.send` UNCHANGED (computer resolved server-side
+  from the persisted per-conversation value, exactly like cwd).
+- `src/app/App.svelte`: `ComputerField` mounted in the "Model" sidebar view next to `CwdField`, keyed on
+  `currentConversationId`; adapted ports (`saveComputer`/`loadComputerStatus`/`testComputer`) wrap the store.
+- Workspaces: `setDefaultComputer` added to `WorkspaceHttp` + `WorkspaceStore` (`PUT /workspaces/:id/default-computer`);
+  a default-computer selector (reusing `ComputerSelect`) added to `WorkspaceCard.svelte` next to the default-cwd control;
+  the router (`src/App.svelte`) passes `store.computers` through `WorkspacesHome` → `WorkspaceCard`.
+
+**Transparency invariant (held):** the computer is USER-facing only — it is a tool-execution target forwarded to tools
+and NEVER part of the model prompt (so it does not affect prompt caching); the agent never sees it. Documented in the
+feature's pure core + surfaced in the `ComputerField` helper text.
+
+**NOT done (correctly deferred):** a per-send `computerId` override (the MVP UI doesn't expose it; persisted per-conversation
+suffices). No `chat.send` change.
+
+**Verification:** 795/795 tests green (50 files; +20 computer view-model); biome clean; `vite build` succeeds. `svelte-check`
+reports **0 errors from the computer feature** — the only 11 errors are the pre-existing §2d `provider-retry` divergence.
+Live probe NOT run (the backend `ssh` extension isn't live yet → `GET /computers` returns `[]` end-to-end; a live probe +
+human confirm of the dropdown/badge/test should run once `ssh` is wired + the `provider-retry` divergence is merged).
+
+---
+
 ## 3. Likely NEXT backend asks (heads-up, not yet requested)
 
 - **Model max context-window LIMIT** → **CONSUMED ✅** — `GET /models` now returns
diff --git a/src/App.svelte b/src/App.svelte
index 9d06b9f..402c88d 100644
--- a/src/App.svelte
+++ b/src/App.svelte
@@ -68,7 +68,7 @@
 </script>
 
 {#if route.kind === "home"}
-	<WorkspacesHome store={workspaceStore} onNavigate={navigate} />
+	<WorkspacesHome store={workspaceStore} onNavigate={navigate} computers={store.computers} />
 {:else}
 	<App {store} />
 {/if}
diff --git a/src/app/App.svelte b/src/app/App.svelte
index 18be3ea..78504bb 100644
--- a/src/app/App.svelte
+++ b/src/app/App.svelte
@@ -50,6 +50,16 @@
 		manifest as cwdLspManifest,
 	} from "../features/cwd-lsp";
 	import {
+		ComputerField,
+		manifest as computerManifest,
+		type ComputerSaveResult,
+		type ComputerStatusResult,
+		type LoadComputerStatus,
+		type SaveComputer,
+		type TestComputer,
+		type TestComputerResult,
+	} from "../features/computer";
+	import {
 		SystemPromptBuilder,
 		type LoadSystemPrompt as LoadSystemPromptAlias,
 		type LoadSystemPromptVariables as LoadSystemPromptVariablesAlias,
@@ -116,6 +126,7 @@
 		cacheWarmingManifest,
 		cwdLspManifest,
 		mcpManifest,
+		computerManifest,
 		smartScrollManifest,
 		settingsManifest,
 		systemPromptManifest,
@@ -311,6 +322,29 @@
 			: { ok: false, error: result.error };
 	}
 
+	// Adapt the store's computer results to the computer feature's ports.
+	async function saveComputer(computerId: string | null): Promise<ComputerSaveResult | null> {
+		const result = await store.setComputer(computerId);
+		if (result === null) return null;
+		return result.ok ? { ok: true, computerId: result.computerId } : { ok: false, error: result.error };
+	}
+
+	const loadComputerStatus: LoadComputerStatus = async (
+		alias: string,
+	): Promise<ComputerStatusResult | null> => {
+		const result = await store.computerStatus(alias);
+		if (result === null) return null;
+		return result.ok ? { ok: true, status: result.response } : { ok: false, error: result.error };
+	};
+
+	const testComputer: TestComputer = async (
+		alias: string,
+	): Promise<TestComputerResult | null> => {
+		const result = await store.testComputer(alias);
+		if (result === null) return null;
+		return result.ok ? { ok: true, response: result.response } : { ok: false, error: result.error };
+	};
+
 	async function loadMcpStatus(): Promise<McpStatusResult | null> {
 		const result = await store.mcpStatus();
 		if (result === null) return null;
@@ -493,6 +527,14 @@
 			{#key store.currentConversationId}
 				<ReasoningEffortSelector persisted={store.reasoningEffort} save={saveReasoningEffort} />
 				<CwdField cwd={store.cwd} canEdit={true} save={saveCwd} />
+				<ComputerField
+					computerId={store.computerId}
+					canEdit={true}
+					computers={store.computers}
+					save={saveComputer}
+					loadStatus={loadComputerStatus}
+					test={testComputer}
+				/>
 			{/key}
 		</div>
 	{:else if kind === "lsp"}
diff --git a/src/app/store.svelte.ts b/src/app/store.svelte.ts
index daba83f..1d69391 100644
--- a/src/app/store.svelte.ts
+++ b/src/app/store.svelte.ts
@@ -3,7 +3,10 @@ import type {
 	ChatErrorMessage,
 	CompactPercentResponse,
 	CompactResponse,
+	ComputerListResponse,
+	ComputerStatusResponse,
 	ConversationCompactedMessage,
+	ConversationComputerResponse,
 	ConversationHistoryResponse,
 	ConversationListResponse,
 	ConversationMetricsResponse,
@@ -18,6 +21,7 @@ import type {
 	ReasoningEffort,
 	ReasoningEffortResponse,
 	SetCompactPercentRequest,
+	SetConversationComputerRequest,
 	SetCwdRequest,
 	SetModelRequest,
 	SetReasoningEffortRequest,
@@ -26,11 +30,12 @@ import type {
 	SystemPromptTemplateResponse,
 	SystemPromptVariable,
 	SystemPromptVariablesResponse,
+	TestComputerResponse,
 	WarmRequest,
 	WarmResponse,
 } from "@dispatch/transport-contract";
 import type { SubscribeMessage, SurfaceServerMessage, SurfaceSpec } from "@dispatch/ui-contract";
-import type { ConversationStatus } from "@dispatch/wire";
+import type { ComputerEntry, ConversationStatus } from "@dispatch/wire";
 import { untrack } from "svelte";
 import { createIdbChunkStore } from "../adapters/idb";
 import { createLocalStore } from "../adapters/local-storage";
@@ -68,6 +73,21 @@ export type CwdResult =
 	| { readonly ok: true; readonly cwd: string | null }
 	| { readonly ok: false; readonly error: string };
 
+/** Outcome of `PUT /conversations/:id/computer` (set/clear the per-conversation computer). */
+export type ComputerResult =
+	| { readonly ok: true; readonly computerId: string | null }
+	| { readonly ok: false; readonly error: string };
+
+/** Outcome of `GET /computers/:alias/status` (the live connection state). */
+export type ComputerStatusResult =
+	| { readonly ok: true; readonly response: ComputerStatusResponse }
+	| { readonly ok: false; readonly error: string };
+
+/** Outcome of `POST /computers/:alias/test` (one-shot connectivity probe). */
+export type TestComputerResult =
+	| { readonly ok: true; readonly response: TestComputerResponse }
+	| { readonly ok: false; readonly error: string };
+
 /** Outcome of `GET /conversations/:id/lsp`. */
 export type LspResult =
 	| { readonly ok: true; readonly response: LspStatusResponse }
@@ -162,6 +182,38 @@ export interface AppStore {
 	 */
 	setCwd(cwd: string): Promise<CwdResult | null>;
 	/**
+	 * The workspace conversation's persisted computer (an SSH `Host` alias), or
+	 * null when never set / local. Seeded from the backend on focus change.
+	 */
+	readonly computerId: string | null;
+	/**
+	 * Persist the workspace conversation's computer (`PUT /conversations/:id/computer`).
+	 * Pass null to clear → the conversation inherits the workspace default → local.
+	 * Works for a draft too (its id survives promotion). Not seen by the agent — a
+	 * user-facing tool-execution target only.
+	 */
+	setComputer(computerId: string | null): Promise<ComputerResult | null>;
+	/**
+	 * Every remote computer discovered from the user's `~/.ssh/config`
+	 * (`GET /computers`), fetched on boot. Read-only — there is no Computer CRUD
+	 * (the user edits their ssh config to add one). Empty until the `ssh`
+	 * extension lands.
+	 */
+	readonly computers: readonly ComputerEntry[];
+	/**
+	 * The live connection state of a computer (`GET /computers/:alias/status`):
+	 * whether Dispatch currently holds an open SSH session to it. Returns null
+	 * only if no alias is given (the focused conversation is local). Polled by the
+	 * `ComputerField` while a computer is selected.
+	 */
+	computerStatus(alias: string): Promise<ComputerStatusResult | null>;
+	/**
+	 * One-shot connectivity probe (`POST /computers/:alias/test`): Dispatch opens
+	 * an SSH connection to the alias, runs a trivial command, then closes. `ok` is
+	 * true on success; `error` carries the failure reason otherwise.
+	 */
+	testComputer(alias: string): Promise<TestComputerResult | null>;
+	/**
 	 * The workspace conversation's persisted reasoning effort, or null when never
 	 * set (the server then resolves turns at the default, `"high"`).
 	 */
@@ -304,6 +356,10 @@ export function createAppStore(opts?: CreateAppStoreOptions): AppStore {
 	let protocol = $state<ProtocolState>(protocolInitialState());
 	let models = $state<readonly string[]>([]);
 	let modelInfo = $state<Readonly<Record<string, ModelMetadata>>>({});
+	// Discovered SSH computers (`GET /computers`). Global (like `models`); empty
+	// until the `ssh` extension lands. Read-only — no CRUD (the user edits their
+	// `~/.ssh/config`).
+	let computers = $state<readonly ComputerEntry[]>([]);
 	let activeModel = $state(DEFAULT_MODEL);
 	let fatalError = $state<string | null>(null);
 
@@ -424,6 +480,31 @@ export function createAppStore(opts?: CreateAppStoreOptions): AppStore {
 		}
 	}
 
+	// The active conversation's persisted computer (SSH Host alias). Seeded on
+	// focus change; null = local / never set (inherits the workspace default).
+	let computerId = $state<string | null>(null);
+
+	/**
+	 * Refetch the workspace conversation's persisted computer into reactive state
+	 * (works for a draft too). A draft's id 404s until promoted; `res.ok` is false
+	 * so it is a silent no-op (mirrors `refreshCwd` for a draft).
+	 */
+	async function refreshComputer(): Promise<void> {
+		const id = workspaceConversationId();
+		// Clear immediately so a switch never shows the PREVIOUS conversation's
+		// computer while the fetch is in flight (null renders as "Local").
+		computerId = null;
+		try {
+			const res = await fetchImpl(`${httpBase}/conversations/${encodeURIComponent(id)}/computer`);
+			if (!res.ok) return;
+			const data = (await res.json()) as ConversationComputerResponse;
+			// Guard a slow response losing a race with a conversation switch.
+			if (workspaceConversationId() === id) computerId = data.computerId ?? null;
+		} catch (err) {
+			reportError("Failed to load computer", err);
+		}
+	}
+
 	/** Refetch the workspace conversation's persisted model (works for a draft too). */
 	async function refreshModel(): Promise<void> {
 		const id = workspaceConversationId();
@@ -657,6 +738,7 @@ export function createAppStore(opts?: CreateAppStoreOptions): AppStore {
 		refreshActiveChat();
 		syncSubscriptions();
 		void refreshCwd();
+		void refreshComputer();
 		void refreshReasoningEffort();
 		void refreshCompactPercent();
 	}
@@ -823,6 +905,21 @@ export function createAppStore(opts?: CreateAppStoreOptions): AppStore {
 			reportError("Failed to load model list", err);
 		});
 
+	// Fetch the discovered-computer catalog (global, like models). Empty until
+	// the `ssh` extension lands — a safe no-op until then (the selector shows
+	// "Local (none)" only). Non-fatal: a failure leaves an empty list.
+	void fetchImpl(`${httpBase}/computers`)
+		.then((res) => {
+			if (!res.ok) return { computers: [] } as ComputerListResponse;
+			return res.json() as Promise<ComputerListResponse>;
+		})
+		.then((data) => {
+			computers = data?.computers ?? [];
+		})
+		.catch((err) => {
+			reportError("Failed to load computer list", err);
+		});
+
 	// Restore persisted tabs
 	const persistedState = storageAdapter.load();
 	if (persistedState !== null && persistedState.tabs.length > 0) {
@@ -847,6 +944,7 @@ export function createAppStore(opts?: CreateAppStoreOptions): AppStore {
 
 	refreshActiveChat();
 	void refreshCwd();
+	void refreshComputer();
 	void refreshModel();
 	void refreshReasoningEffort();
 	void refreshCompactPercent();
@@ -877,6 +975,7 @@ export function createAppStore(opts?: CreateAppStoreOptions): AppStore {
 			refreshActiveChat();
 			syncSubscriptions();
 			void refreshCwd();
+			void refreshComputer();
 			void refreshModel();
 			void refreshReasoningEffort();
 			void refreshCompactPercent();
@@ -913,6 +1012,12 @@ export function createAppStore(opts?: CreateAppStoreOptions): AppStore {
 		get cwd(): string | null {
 			return cwd;
 		},
+		get computerId(): string | null {
+			return computerId;
+		},
+		get computers(): readonly ComputerEntry[] {
+			return computers;
+		},
 		get reasoningEffort(): ReasoningEffort | null {
 			return reasoningEffort;
 		},
@@ -957,6 +1062,7 @@ export function createAppStore(opts?: CreateAppStoreOptions): AppStore {
 				// surfaces (e.g. cache-warming) to its id.
 				syncSubscriptions();
 				void refreshCwd();
+				void refreshComputer();
 				void refreshReasoningEffort();
 				void refreshCompactPercent();
 				// Now send on the promoted store
@@ -1001,6 +1107,7 @@ export function createAppStore(opts?: CreateAppStoreOptions): AppStore {
 			refreshActiveChat();
 			syncSubscriptions();
 			void refreshCwd();
+			void refreshComputer();
 			void refreshModel();
 			void refreshReasoningEffort();
 			void refreshCompactPercent();
@@ -1015,6 +1122,7 @@ export function createAppStore(opts?: CreateAppStoreOptions): AppStore {
 			refreshActiveChat();
 			syncSubscriptions();
 			void refreshCwd();
+			void refreshComputer();
 			void refreshModel();
 			void refreshReasoningEffort();
 			void refreshCompactPercent();
@@ -1097,6 +1205,81 @@ export function createAppStore(opts?: CreateAppStoreOptions): AppStore {
 			}
 		},
 
+		async setComputer(computerIdValue: string | null): Promise<ComputerResult | null> {
+			const id = workspaceConversationId();
+			const body: SetConversationComputerRequest = { computerId: computerIdValue };
+			try {
+				const res = await fetchImpl(
+					`${httpBase}/conversations/${encodeURIComponent(id)}/computer`,
+					{
+						method: "PUT",
+						headers: { "content-type": "application/json" },
+						body: JSON.stringify(body),
+					},
+				);
+				if (!res.ok) {
+					const errBody = (await res.json().catch(() => null)) as { error?: string } | null;
+					return {
+						ok: false,
+						error: errBody?.error ?? `Set computer failed (HTTP ${res.status})`,
+					};
+				}
+				const data = (await res.json()) as ConversationComputerResponse;
+				const next = data.computerId ?? null;
+				if (workspaceConversationId() === id) computerId = next;
+				return { ok: true, computerId: next };
+			} catch (err) {
+				return {
+					ok: false,
+					error: err instanceof Error ? err.message : "Set computer request failed",
+				};
+			}
+		},
+
+		async computerStatus(alias: string): Promise<ComputerStatusResult | null> {
+			if (alias === "") return null;
+			try {
+				const res = await fetchImpl(`${httpBase}/computers/${encodeURIComponent(alias)}/status`);
+				if (!res.ok) {
+					const errBody = (await res.json().catch(() => null)) as { error?: string } | null;
+					return {
+						ok: false,
+						error: errBody?.error ?? `Computer status failed (HTTP ${res.status})`,
+					};
+				}
+				const status = (await res.json()) as ComputerStatusResponse;
+				return { ok: true, response: status };
+			} catch (err) {
+				return {
+					ok: false,
+					error: err instanceof Error ? err.message : "Computer status request failed",
+				};
+			}
+		},
+
+		async testComputer(alias: string): Promise<TestComputerResult | null> {
+			if (alias === "") return null;
+			try {
+				const res = await fetchImpl(`${httpBase}/computers/${encodeURIComponent(alias)}/test`, {
+					method: "POST",
+				});
+				if (!res.ok) {
+					const errBody = (await res.json().catch(() => null)) as { error?: string } | null;
+					return {
+						ok: false,
+						error: errBody?.error ?? `Test computer failed (HTTP ${res.status})`,
+					};
+				}
+				const response = (await res.json()) as TestComputerResponse;
+				return { ok: true, response };
+			} catch (err) {
+				return {
+					ok: false,
+					error: err instanceof Error ? err.message : "Test computer request failed",
+				};
+			}
+		},
+
 		async setReasoningEffort(level: ReasoningEffort): Promise<ReasoningEffortResult | null> {
 			const id = workspaceConversationId();
 			const body: SetReasoningEffortRequest = { reasoningEffort: level };
diff --git a/src/features/computer/index.ts b/src/features/computer/index.ts
new file mode 100644
index 0000000..656f6c2
--- /dev/null
+++ b/src/features/computer/index.ts
@@ -0,0 +1,31 @@
+export type {
+	Badge,
+	ComputerListResult,
+	ComputerSaveResult,
+	ComputerStatusResult,
+	ComputerStatusView,
+	ComputerView,
+	LoadComputerStatus,
+	LoadComputers,
+	SaveComputer,
+	TestComputer,
+	TestComputerResult,
+	TestResultView,
+} from "./logic/view-model";
+export {
+	formatHost,
+	knownHostLabel,
+	summarizeComputers,
+	viewComputer,
+	viewComputerStatus,
+	viewComputers,
+	viewTestResult,
+} from "./logic/view-model";
+export { default as ComputerField } from "./ui/ComputerField.svelte";
+export { default as ComputerSelect } from "./ui/ComputerSelect.svelte";
+
+/** Public module manifest — aggregated by the shell's "Loaded Modules" view. */
+export const manifest = {
+	name: "computer",
+	description: "Per-conversation / per-workspace SSH computer selection + status",
+} as const;
diff --git a/src/features/computer/logic/view-model.test.ts b/src/features/computer/logic/view-model.test.ts
new file mode 100644
index 0000000..d9b7f74
--- /dev/null
+++ b/src/features/computer/logic/view-model.test.ts
@@ -0,0 +1,167 @@
+import type { ComputerStatusResponse, TestComputerResponse } from "@dispatch/transport-contract";
+import type { ComputerEntry } from "@dispatch/wire";
+import { describe, expect, it } from "vitest";
+import {
+	formatHost,
+	knownHostLabel,
+	summarizeComputers,
+	viewComputer,
+	viewComputerStatus,
+	viewComputers,
+	viewTestResult,
+} from "./view-model";
+
+function computer(overrides: Partial<ComputerEntry> = {}): ComputerEntry {
+	return {
+		alias: "buildbox",
+		hostName: "10.0.0.5",
+		port: 22,
+		user: "deploy",
+		identityFile: "/home/deploy/.ssh/id_ed25519",
+		knownHost: true,
+		usageCount: 0,
+		...overrides,
+	};
+}
+
+describe("formatHost", () => {
+	it("is user@host with no port when port is the SSH default (22)", () => {
+		expect(formatHost(computer({ port: 22 }))).toBe("[email protected]");
+	});
+
+	it("appends a non-default port", () => {
+		expect(formatHost(computer({ port: 2222 }))).toBe("[email protected]:2222");
+	});
+
+	it("falls back to the alias when hostName is empty", () => {
+		expect(formatHost(computer({ hostName: "" }))).toBe("deploy@buildbox");
+	});
+});
+
+describe("knownHostLabel", () => {
+	it("is 'known host' when known", () => {
+		expect(knownHostLabel(true)).toBe("known host");
+	});
+
+	it("is 'new host' when not known", () => {
+		expect(knownHostLabel(false)).toBe("new host");
+	});
+});
+
+describe("viewComputer", () => {
+	it("projects alias + hostSummary + identity + known-host label", () => {
+		const v = viewComputer(computer());
+		expect(v.alias).toBe("buildbox");
+		expect(v.hostSummary).toBe("[email protected]");
+		expect(v.identityFile).toBe("/home/deploy/.ssh/id_ed25519");
+		expect(v.knownHostLabel).toBe("known host");
+		expect(v.knownHost).toBe(true);
+	});
+
+	it("preserves a null identityFile (default key)", () => {
+		const v = viewComputer(computer({ identityFile: null }));
+		expect(v.identityFile).toBeNull();
+	});
+});
+
+describe("viewComputers", () => {
+	it("maps each entry (and drops usageCount from the view)", () => {
+		const views = viewComputers([
+			computer({ alias: "a", usageCount: 3 }),
+			computer({ alias: "b", hostName: "b.local", usageCount: 0 }),
+		]);
+		expect(views).toHaveLength(2);
+		expect(views.at(0)?.alias).toBe("a");
+		expect(views.at(1)?.hostSummary).toBe("[email protected]");
+	});
+});
+
+describe("summarizeComputers", () => {
+	it("is 'No computers discovered' for an empty list", () => {
+		expect(summarizeComputers([])).toBe("No computers discovered");
+	});
+
+	it("is singular for one computer", () => {
+		expect(summarizeComputers([computer()])).toBe("1 computer");
+	});
+
+	it("is plural for many", () => {
+		expect(summarizeComputers([computer(), computer(), computer()])).toBe("3 computers");
+	});
+});
+
+describe("viewComputerStatus", () => {
+	function status(
+		state: ComputerStatusResponse["state"],
+		overrides: Partial<ComputerStatusResponse> = {},
+	): ComputerStatusResponse {
+		return { alias: "buildbox", state, knownHost: true, ...overrides };
+	}
+
+	it("connected → success badge, not busy, no error", () => {
+		const v = viewComputerStatus(status("connected"));
+		expect(v.statusLabel).toBe("Connected");
+		expect(v.badge).toBe("success");
+		expect(v.busy).toBe(false);
+		expect(v.error).toBeNull();
+	});
+
+	it("connecting → warning badge + busy (spinner), no error", () => {
+		const v = viewComputerStatus(status("connecting"));
+		expect(v.statusLabel).toBe("Connecting…");
+		expect(v.badge).toBe("warning");
+		expect(v.busy).toBe(true);
+		expect(v.error).toBeNull();
+	});
+
+	it("disconnected → neutral badge, NOT busy (a stable idle state)", () => {
+		const v = viewComputerStatus(status("disconnected"));
+		expect(v.statusLabel).toBe("Disconnected");
+		expect(v.badge).toBe("neutral");
+		expect(v.busy).toBe(false);
+		expect(v.error).toBeNull();
+	});
+
+	it("error → error badge, not busy, surfaces the reason", () => {
+		const v = viewComputerStatus(status("error", { error: "auth refused" }));
+		expect(v.statusLabel).toBe("Error");
+		expect(v.badge).toBe("error");
+		expect(v.busy).toBe(false);
+		expect(v.error).toBe("auth refused");
+	});
+
+	it("error falls back to a default reason when the backend omits one", () => {
+		const v = viewComputerStatus(status("error"));
+		expect(v.error).toBe("Connection failed");
+	});
+
+	it("carries the knownHost flag through", () => {
+		const v = viewComputerStatus(status("connected", { knownHost: false }));
+		expect(v.knownHost).toBe(false);
+	});
+});
+
+describe("viewTestResult", () => {
+	it("ok=true → no error, 'Connection OK' label", () => {
+		const r = viewTestResult({ alias: "buildbox", ok: true } as TestComputerResponse);
+		expect(r.ok).toBe(true);
+		expect(r.error).toBeNull();
+		expect(r.label).toBe("Connection OK");
+	});
+
+	it("ok=false → surfaces the failure reason", () => {
+		const r = viewTestResult({
+			alias: "buildbox",
+			ok: false,
+			error: "host unreachable",
+		} as TestComputerResponse);
+		expect(r.ok).toBe(false);
+		expect(r.error).toBe("host unreachable");
+		expect(r.label).toBe("Failed");
+	});
+
+	it("ok=false without a reason falls back to a default", () => {
+		const r = viewTestResult({ alias: "buildbox", ok: false } as TestComputerResponse);
+		expect(r.error).toBe("Connection failed");
+	});
+});
diff --git a/src/features/computer/logic/view-model.ts b/src/features/computer/logic/view-model.ts
new file mode 100644
index 0000000..944456b
--- /dev/null
+++ b/src/features/computer/logic/view-model.ts
@@ -0,0 +1,184 @@
+import type { ComputerStatusResponse, TestComputerResponse } from "@dispatch/transport-contract";
+import type { Computer, ComputerEntry } from "@dispatch/wire";
+
+/**
+ * Pure core for the computer feature — zero DOM, zero effects, zero Svelte.
+ *
+ * A **computer** is a remote SSH target discovered from the user's `~/.ssh/config`
+ * (read-only — there is no CRUD store; the user edits their config to add one).
+ * The computer feature surfaces, per-conversation and per-workspace, WHICH
+ * computer a turn's tools execute on (the computer analog of `cwd`). It is a
+ * USER-facing control only: the computer is a tool-execution target forwarded to
+ * tools and NEVER part of the model prompt (so it does not affect prompt
+ * caching) — the agent never sees it.
+ *
+ * This module holds the pure logic: formatting a `Computer` for display, mapping a
+ * live `ComputerStatusResponse.state` to a display badge, and the one-line
+ * discovered-list summary. The effects (the HTTP list/get/status/test +
+ * per-conversation get/set) are INJECTED via the ports below; the composition root
+ * implements them.
+ */
+
+// ── Injected ports (consumer-defines-port; the composition root adapts the
+//    store's HTTP calls to these shapes). Mirrors cwd-lsp's ports. ──────────────
+
+/** Outcome of `PUT /conversations/:id/computer`; `null` when no real conversation is focused. */
+export type ComputerSaveResult =
+	| { readonly ok: true; readonly computerId: string | null }
+	| { readonly ok: false; readonly error: string };
+
+export type SaveComputer = (computerId: string | null) => Promise<ComputerSaveResult | null>;
+
+/** Outcome of `GET /computers`; `null` when the list couldn't be loaded. */
+export type ComputerListResult =
+	| { readonly ok: true; readonly computers: readonly ComputerEntry[] }
+	| { readonly ok: false; readonly error: string };
+
+export type LoadComputers = () => Promise<ComputerListResult | null>;
+
+/** Outcome of `GET /computers/:alias/status`; `null` when no alias / not loaded. */
+export type ComputerStatusResult =
+	| { readonly ok: true; readonly status: ComputerStatusResponse }
+	| { readonly ok: false; readonly error: string };
+
+export type LoadComputerStatus = (alias: string) => Promise<ComputerStatusResult | null>;
+
+/** Outcome of `POST /computers/:alias/test`. */
+export type TestComputerResult =
+	| { readonly ok: true; readonly response: TestComputerResponse }
+	| { readonly ok: false; readonly error: string };
+
+export type TestComputer = (alias: string) => Promise<TestComputerResult | null>;
+
+// ── Computer → display view ──────────────────────────────────────────────────
+
+export type Badge = "success" | "warning" | "error" | "neutral";
+
+export interface ComputerView {
+	/** The SSH config `Host` alias — also the `computerId` users select. */
+	readonly alias: string;
+	/** A compact `user@host:port` connection string (the resolved config values). */
+	readonly hostSummary: string;
+	/** The resolved `IdentityFile`, or `null` = default `~/.ssh/id_*`. */
+	readonly identityFile: string | null;
+	/** Short label for the known-host indicator, e.g. "known host" / "new host". */
+	readonly knownHostLabel: string;
+	/** Whether the host's key is already in `~/.ssh/known_hosts`. */
+	readonly knownHost: boolean;
+}
+
+/**
+ * Format a computer's connection target as `user@host:port`, omitting the port
+ * when it is the SSH default (22) so the summary stays compact (mirrors how a user
+ * reads an ssh config `Host` block). `hostName` falls back to the alias itself
+ * (the backend resolves this, but this is defensive).
+ */
+export function formatHost(computer: Computer): string {
+	const host = computer.hostName || computer.alias;
+	const port = computer.port === 22 ? "" : `:${computer.port}`;
+	return `${computer.user}@${host}${port}`;
+}
+
+/** The display label for the known-host indicator. */
+export function knownHostLabel(knownHost: boolean): string {
+	return knownHost ? "known host" : "new host";
+}
+
+export function viewComputer(computer: Computer): ComputerView {
+	return {
+		alias: computer.alias,
+		hostSummary: formatHost(computer),
+		identityFile: computer.identityFile,
+		knownHostLabel: knownHostLabel(computer.knownHost),
+		knownHost: computer.knownHost,
+	};
+}
+
+export function viewComputers(computers: readonly ComputerEntry[]): readonly ComputerView[] {
+	return computers.map(viewComputer);
+}
+
+/**
+ * A one-line summary of the discovered list, e.g. "3 computers" / "No computers
+ * discovered" (the latter is the expected state until the `ssh` extension lands).
+ */
+export function summarizeComputers(computers: readonly ComputerEntry[]): string {
+	if (computers.length === 0) return "No computers discovered";
+	return `${computers.length} computer${computers.length === 1 ? "" : "s"}`;
+}
+
+// ── Connection status → display view ──────────────────────────────────────────
+
+export interface ComputerStatusView {
+	readonly alias: string;
+	readonly state: ComputerStatusResponse["state"];
+	readonly statusLabel: string;
+	readonly badge: Badge;
+	/** True while the state is transient (show a spinner). */
+	readonly busy: boolean;
+	/** The error reason when `state === "error"`, else null. */
+	readonly error: string | null;
+	/** Whether the host's key is already in `~/.ssh/known_hosts`. */
+	readonly knownHost: boolean;
+}
+
+/**
+ * Map a computer's live connection state to a display label + badge + busy flag.
+ * Mirrors the LSP/MCP status→badge pattern (each feature owns its own mapping —
+ * the enums differ, so they are not shared). Exhaustive vs the contract:
+ * `connected`→success, `connecting`→warning+busy, `disconnected`→neutral (a stable
+ * idle state, NOT busy), `error`→error.
+ */
+export function viewComputerStatus(status: ComputerStatusResponse): ComputerStatusView {
+	let statusLabel: string;
+	let badge: Badge;
+	let busy = false;
+	switch (status.state) {
+		case "connected":
+			statusLabel = "Connected";
+			badge = "success";
+			break;
+		case "connecting":
+			statusLabel = "Connecting…";
+			badge = "warning";
+			busy = true;
+			break;
+		case "disconnected":
+			statusLabel = "Disconnected";
+			badge = "neutral";
+			break;
+		case "error":
+			statusLabel = "Error";
+			badge = "error";
+			break;
+	}
+	return {
+		alias: status.alias,
+		state: status.state,
+		statusLabel,
+		badge,
+		busy,
+		error: status.state === "error" ? (status.error ?? "Connection failed") : null,
+		knownHost: status.knownHost,
+	};
+}
+
+// ── Test-connection result → display view ───────────────────────────────────
+
+export interface TestResultView {
+	readonly alias: string;
+	readonly ok: boolean;
+	/** The failure reason when `ok` is false, else null. */
+	readonly error: string | null;
+	/** A short result label, e.g. "Connection OK" / "Failed". */
+	readonly label: string;
+}
+
+export function viewTestResult(response: TestComputerResponse): TestResultView {
+	return {
+		alias: response.alias,
+		ok: response.ok,
+		error: response.ok ? null : (response.error ?? "Connection failed"),
+		label: response.ok ? "Connection OK" : "Failed",
+	};
+}
diff --git a/src/features/computer/ui/ComputerField.svelte b/src/features/computer/ui/ComputerField.svelte
new file mode 100644
index 0000000..be3ce9c
--- /dev/null
+++ b/src/features/computer/ui/ComputerField.svelte
@@ -0,0 +1,195 @@
+<script lang="ts">
+	import type { ComputerStatusResponse } from "@dispatch/transport-contract";
+	import ComputerSelect from "./ComputerSelect.svelte";
+	import {
+	viewComputerStatus,
+	type ComputerStatusView,
+	type LoadComputerStatus,
+	type SaveComputer,
+	type TestComputer,
+} from "../logic/view-model";
+	import type { ComputerEntry } from "@dispatch/wire";
+	import { untrack } from "svelte";
+
+	let {
+		computerId,
+		canEdit,
+		computers,
+		save,
+		loadStatus,
+		test,
+	}: {
+		/** The active conversation's persisted computer alias, or null (local/inherit). */
+		computerId: string | null;
+		/** Whether a real conversation is focused (a draft can't persist yet). */
+		canEdit: boolean;
+		/** Discovered computers from `GET /computers` (read-only). */
+		computers: readonly ComputerEntry[];
+		save: SaveComputer;
+		loadStatus: LoadComputerStatus;
+		test: TestComputer;
+	} = $props();
+
+	// ── Save: selecting a dropdown option persists immediately (PUT /computer). ──
+	let saving = $state(false);
+	let error = $state<string | null>(null);
+	let justSaved = $state(false);
+
+	async function select(computerId: string | null) {
+		if (saving || !canEdit) return;
+		saving = true;
+		error = null;
+		justSaved = false;
+		const result = await save(computerId);
+		saving = false;
+		if (result === null) return;
+		if (result.ok) {
+			justSaved = true;
+		} else {
+			error = result.error;
+		}
+	}
+
+	// ── Connection status: poll the selected computer's live state. Owned + ──
+	//    disposed here (never leaks across conversations — the field re-mounts per
+	//    conversation via the {#key} in App.svelte, like CwdField). No poll while
+	//    local (no alias) or while a draft can't persist.
+	let statusView = $state<ComputerStatusView | null>(null);
+	let statusError = $state<string | null>(null);
+
+	async function refreshStatus() {
+		const alias = untrack(() => computerId);
+		if (alias === null) {
+			statusView = null;
+			statusError = null;
+			return;
+		}
+		const result = await loadStatus(alias);
+		if (result === null) return;
+		if (result.ok) {
+			statusView = viewComputerStatus(result.status);
+			statusError = null;
+		} else {
+			statusView = null;
+			statusError = result.error;
+		}
+	}
+
+	// Re-fetch on mount + whenever the selected alias changes (incl. after a save).
+	$effect(() => {
+		void computerId;
+		void refreshStatus();
+	});
+
+	// Poll the status while a computer is selected. `connecting` is transient, so
+	// a faster cadence helps it flip to `connected`; a connected host is stable.
+	const POLL_MS = 4000;
+	$effect(() => {
+		const alias = computerId;
+		if (alias === null) return;
+		const handle = setInterval(() => void refreshStatus(), POLL_MS);
+		return () => clearInterval(handle);
+	});
+
+	// ── Test connection: one-shot probe (POST /computers/:alias/test). ──────────
+	let testing = $state(false);
+	let testResult = $state<{ ok: boolean; error: string | null } | null>(null);
+
+	async function runTest() {
+		const alias = untrack(() => computerId);
+		if (alias === null || testing) return;
+		testing = true;
+		testResult = null;
+		const result = await test(alias);
+		testing = false;
+		if (result === null) return;
+		testResult = result.ok
+			? { ok: true, error: null }
+			: { ok: false, error: result.error };
+	}
+
+	const badgeClass = $derived.by(() => {
+		const b = statusView?.badge ?? "neutral";
+		switch (b) {
+			case "success":
+				return "badge-success";
+			case "warning":
+				return "badge-warning";
+			case "error":
+				return "badge-error";
+			default:
+				return "badge-ghost";
+		}
+	});
+</script>
+
+<div class="flex flex-col gap-1">
+	<span class="text-xs font-semibold uppercase opacity-60">Computer (SSH)</span>
+	<div class="flex items-center gap-2">
+		<ComputerSelect
+			value={computerId}
+			{computers}
+			disabled={!canEdit || saving}
+			onSelect={select}
+		/>
+		{#if saving}
+			<span class="loading loading-spinner loading-xs shrink-0"></span>
+		{/if}
+	</div>
+
+	{#if !canEdit}
+		<p class="text-xs opacity-60">Start or open a conversation to set its computer.</p>
+	{:else if computerId !== null}
+		<!-- Connection status badge + Test affordance for the selected computer. -->
+		<div class="flex flex-wrap items-center gap-2">
+			{#if statusView}
+				<span class="badge badge-sm {badgeClass}" title={statusView.error ?? statusView.statusLabel}>
+					{#if statusView.busy}
+						<span class="loading loading-spinner loading-[10px]"></span>
+					{/if}
+					{statusView.statusLabel}
+				</span>
+			{:else if statusError}
+				<span class="badge badge-sm badge-error" title={statusError}>Status error</span>
+			{:else}
+				<span class="badge badge-sm badge-ghost">—</span>
+			{/if}
+
+			<button
+				type="button"
+				class="btn btn-ghost btn-xs"
+				disabled={testing}
+				onclick={runTest}
+			>
+				{#if testing}
+					<span class="loading loading-spinner loading-[10px]"></span>
+				{:else}
+					Test
+				{/if}
+			</button>
+
+			{#if testResult}
+				<span class="text-xs {testResult.ok ? 'text-success' : 'text-error'}">
+					{testResult.ok ? "Connection OK" : testResult.error ?? "Failed"}
+				</span>
+			{/if}
+		</div>
+		{#if statusView?.error}
+			<p class="text-xs text-error">{statusView.error}</p>
+		{/if}
+	{:else if computers.length === 0}
+		<p class="text-xs opacity-50">
+			No computers discovered — add a `Host` block to your `~/.ssh/config` to use a remote computer.
+		</p>
+	{:else if justSaved && !error}
+		<p class="text-xs text-success">Saved.</p>
+	{/if}
+
+	{#if error}
+		<p class="text-xs text-error">{error}</p>
+	{/if}
+
+	<p class="text-xs opacity-50">
+		Where this conversation's tools run. `null` (Local) runs on the server; an alias runs over SSH. Not seen by the agent.
+	</p>
+</div>
diff --git a/src/features/computer/ui/ComputerSelect.svelte b/src/features/computer/ui/ComputerSelect.svelte
new file mode 100644
index 0000000..d693140
--- /dev/null
+++ b/src/features/computer/ui/ComputerSelect.svelte
@@ -0,0 +1,39 @@
+<script lang="ts">
+	import type { ComputerEntry } from "@dispatch/wire";
+
+	let {
+		value,
+		computers,
+		disabled = false,
+		onSelect,
+	}: {
+		/** The currently selected computer alias, or null for "Local (none)". */
+		value: string | null;
+		/** Discovered computers from `GET /computers` (read-only). */
+		computers: readonly ComputerEntry[];
+		disabled?: boolean;
+		onSelect: (computerId: string | null) => void;
+	} = $props();
+
+	// A `<select>` value is a string; map "" ↔ null (Local). The chosen option's
+	// value is the alias, with "" meaning "clear / local".
+	const selectValue = $derived(value ?? "");
+
+	function onChange(e: Event) {
+		const v = (e.currentTarget as HTMLSelectElement).value;
+		onSelect(v === "" ? null : v);
+	}
+</script>
+
+<select
+	class="select select-bordered select-sm w-full font-mono text-xs"
+	value={selectValue}
+	disabled={disabled}
+	onchange={onChange}
+	aria-label="Computer"
+>
+	<option value="">Local (none)</option>
+	{#each computers as c (c.alias)}
+		<option value={c.alias}>{c.alias}{c.knownHost ? "" : " · new host"}</option>
+	{/each}
+</select>
diff --git a/src/features/workspaces/adapter/http.ts b/src/features/workspaces/adapter/http.ts
index 97fc2e2..6ebfee1 100644
--- a/src/features/workspaces/adapter/http.ts
+++ b/src/features/workspaces/adapter/http.ts
@@ -1,6 +1,7 @@
 import type {
 	DeleteWorkspaceResponse,
 	EnsureWorkspaceRequest,
+	SetWorkspaceDefaultComputerRequest,
 	SetWorkspaceDefaultCwdRequest,
 	SetWorkspaceTitleRequest,
 	Workspace,
@@ -23,6 +24,7 @@ import type {
  * - `GET /workspaces/:id` (404 → null) → get
  * - `PUT /workspaces/:id/title` → rename
  * - `PUT /workspaces/:id/default-cwd` → set/clear default cwd
+ * - `PUT /workspaces/:id/default-computer` → set/clear default computer (SSH handoff #2)
  * - `DELETE /workspaces/:id` (409 for "default") → delete
  */
 export type WorkspaceResult<T> =
@@ -35,6 +37,7 @@ export interface WorkspaceHttp {
 	get(id: string): Promise<Workspace | null>;
 	setTitle(id: string, title: string): Promise<WorkspaceResult<Workspace>>;
 	setDefaultCwd(id: string, defaultCwd: string | null): Promise<WorkspaceResult<Workspace>>;
+	setDefaultComputer(id: string, computerId: string | null): Promise<WorkspaceResult<Workspace>>;
 	delete(id: string): Promise<WorkspaceResult<{ closedCount: number }>>;
 }
 
@@ -118,6 +121,26 @@ export function createWorkspaceHttp(httpBase: string, fetchImpl: typeof fetch):
 			}
 		},
 
+		async setDefaultComputer(id, computerId): Promise<WorkspaceResult<Workspace>> {
+			try {
+				const res = await fetchImpl(
+					`${httpBase}/workspaces/${encodeURIComponent(id)}/default-computer`,
+					{
+						method: "PUT",
+						headers: { "Content-Type": "application/json" },
+						body: JSON.stringify({ computerId } satisfies SetWorkspaceDefaultComputerRequest),
+					},
+				);
+				if (!res.ok) return { ok: false, error: await errText(res) };
+				return { ok: true, value: (await res.json()) as WorkspaceResponse };
+			} catch (err) {
+				return {
+					ok: false,
+					error: err instanceof Error ? err.message : "Set default computer failed",
+				};
+			}
+		},
+
 		async delete(id): Promise<WorkspaceResult<{ closedCount: number }>> {
 			try {
 				const res = await fetchImpl(`${httpBase}/workspaces/${encodeURIComponent(id)}`, {
diff --git a/src/features/workspaces/logic/view-model.test.ts b/src/features/workspaces/logic/view-model.test.ts
index 52f7025..a4ed19c 100644
--- a/src/features/workspaces/logic/view-model.test.ts
+++ b/src/features/workspaces/logic/view-model.test.ts
@@ -36,6 +36,7 @@ describe("pageTitle", () => {
 		id,
 		title,
 		defaultCwd: null,
+		defaultComputerId: null,
 		createdAt: 0,
 		lastActivityAt: 0,
 		conversationCount: 0,
diff --git a/src/features/workspaces/store.svelte.ts b/src/features/workspaces/store.svelte.ts
index 0f662dc..0cf4ce2 100644
--- a/src/features/workspaces/store.svelte.ts
+++ b/src/features/workspaces/store.svelte.ts
@@ -21,6 +21,8 @@ export interface WorkspaceStore {
 	rename(id: string, title: string): Promise<WorkspaceResult<Workspace>>;
 	/** Set/clear a workspace's default cwd. */
 	setDefaultCwd(id: string, defaultCwd: string | null): Promise<WorkspaceResult<Workspace>>;
+	/** Set/clear a workspace's default computer (SSH `Host` alias; null = local). */
+	setDefaultComputer(id: string, computerId: string | null): Promise<WorkspaceResult<Workspace>>;
 	/** Delete a workspace (closes its conversations, reassigns to "default"). */
 	remove(id: string): Promise<WorkspaceResult<{ closedCount: number }>>;
 }
@@ -71,6 +73,12 @@ export function createWorkspaceStore(http: WorkspaceHttp): WorkspaceStore {
 			return result;
 		},
 
+		async setDefaultComputer(id, computerId): Promise<WorkspaceResult<Workspace>> {
+			const result = await http.setDefaultComputer(id, computerId);
+			if (result.ok) void this.refresh();
+			return result;
+		},
+
 		async remove(id): Promise<WorkspaceResult<{ closedCount: number }>> {
 			const result = await http.delete(id);
 			if (result.ok) void this.refresh();
diff --git a/src/features/workspaces/ui/WorkspaceCard.svelte b/src/features/workspaces/ui/WorkspaceCard.svelte
index 6348bb9..4f846bf 100644
--- a/src/features/workspaces/ui/WorkspaceCard.svelte
+++ b/src/features/workspaces/ui/WorkspaceCard.svelte
@@ -1,18 +1,22 @@
 <script lang="ts">
-	import type { WorkspaceEntry } from "@dispatch/wire";
+	import type { ComputerEntry, WorkspaceEntry } from "@dispatch/wire";
 	import { untrack } from "svelte";
 	import type { WorkspaceStore } from "../store.svelte";
 	import { relativeTime } from "../logic/view-model";
 	import { workspacePath } from "../logic/route";
+	import ComputerSelect from "../../computer/ui/ComputerSelect.svelte";
 
 	let {
 		ws,
 		store,
 		onNavigate,
+		computers,
 	}: {
 		ws: WorkspaceEntry;
 		store: WorkspaceStore;
 		onNavigate: (path: string) => void;
+		/** Discovered computers (`GET /computers`), for the default-computer dropdown. */
+		computers: readonly ComputerEntry[];
 	} = $props();
 
 	// ── Title: double-click to rename inline ──────────────────────────────────
@@ -64,6 +68,21 @@
 		if (!result.ok) cwdError = result.error;
 	}
 
+	// ── Default computer: dropdown (Local / discovered SSH aliases) ────────────
+	let savingComputer = $state(false);
+	let computerError = $state<string | null>(null);
+
+	async function saveComputer(computerId: string | null): Promise<void> {
+		if (savingComputer) return;
+		// No-op when unchanged (the select only fires on a real change, but guard).
+		if (computerId === (ws.defaultComputerId ?? null)) return;
+		savingComputer = true;
+		computerError = null;
+		const result = await store.setDefaultComputer(ws.id, computerId);
+		savingComputer = false;
+		if (!result.ok) computerError = result.error;
+	}
+
 	// ── Delete ─────────────────────────────────────────────────────────────────
 	let deleting = $state(false);
 
@@ -159,6 +178,19 @@
 		</button>
 	</div>
 
+	<div class="flex items-center gap-2">
+		<span class="w-8 shrink-0 text-xs opacity-60">ssh</span>
+		<ComputerSelect
+			value={ws.defaultComputerId}
+			{computers}
+			disabled={savingComputer}
+			onSelect={saveComputer}
+		/>
+		{#if savingComputer}
+			<span class="loading loading-spinner loading-xs shrink-0"></span>
+		{/if}
+	</div>
+
 	<div class="flex justify-start">
 		<a
 			class="btn"
@@ -177,4 +209,10 @@
 	{:else if !cwdDirty && !ws.defaultCwd}
 		<p class="text-xs opacity-50">No default cwd set — conversations inherit the server default.</p>
 	{/if}
+
+	{#if computerError}
+		<p class="text-xs text-error">{computerError}</p>
+	{:else if !ws.defaultComputerId}
+		<p class="text-xs opacity-50">No default computer — conversations run locally (no SSH).</p>
+	{/if}
 </li>
diff --git a/src/features/workspaces/ui/WorkspaceCard.test.ts b/src/features/workspaces/ui/WorkspaceCard.test.ts
index 385856d..48b12b3 100644
--- a/src/features/workspaces/ui/WorkspaceCard.test.ts
+++ b/src/features/workspaces/ui/WorkspaceCard.test.ts
@@ -11,6 +11,7 @@ function fakeEntry(overrides: Partial<WorkspaceEntry> = {}): WorkspaceEntry {
 		id: "my-ws",
 		title: "My Workspace",
 		defaultCwd: null,
+		defaultComputerId: null,
 		createdAt: 1,
 		lastActivityAt: 2,
 		conversationCount: 3,
@@ -33,6 +34,12 @@ function fakeStore() {
 				value: fakeEntry({ id, defaultCwd }),
 			}),
 		),
+		setDefaultComputer: vi.fn(
+			async (id: string, computerId: string | null): Promise<WorkspaceResult<WorkspaceEntry>> => ({
+				ok: true,
+				value: fakeEntry({ id, defaultComputerId: computerId }),
+			}),
+		),
 		remove: vi.fn(
 			async (): Promise<WorkspaceResult<{ closedCount: number }>> => ({
 				ok: true,
@@ -47,7 +54,7 @@ describe("WorkspaceCard", () => {
 		const store = fakeStore() as unknown as WorkspaceStore;
 		const onNavigate = vi.fn();
 		render(WorkspaceCard, {
-			props: { ws: fakeEntry(), store, onNavigate },
+			props: { ws: fakeEntry(), store, onNavigate, computers: [] },
 		});
 		expect(screen.getByText("My Workspace")).toBeInTheDocument();
 		expect(screen.getByText("/my-ws")).toBeInTheDocument();
@@ -57,7 +64,9 @@ describe("WorkspaceCard", () => {
 	it("double-clicking the title reveals an edit input", async () => {
 		const user = userEvent.setup();
 		const store = fakeStore() as unknown as WorkspaceStore;
-		render(WorkspaceCard, { props: { ws: fakeEntry(), store, onNavigate: vi.fn() } });
+		render(WorkspaceCard, {
+			props: { ws: fakeEntry(), store, onNavigate: vi.fn(), computers: [] },
+		});
 
 		await user.dblClick(screen.getByText("My Workspace"));
 		expect(screen.getByLabelText("Workspace title")).toHaveValue("My Workspace");
@@ -66,7 +75,9 @@ describe("WorkspaceCard", () => {
 	it("renames via the store on Enter", async () => {
 		const user = userEvent.setup();
 		const store = fakeStore() as unknown as WorkspaceStore;
-		render(WorkspaceCard, { props: { ws: fakeEntry(), store, onNavigate: vi.fn() } });
+		render(WorkspaceCard, {
+			props: { ws: fakeEntry(), store, onNavigate: vi.fn(), computers: [] },
+		});
 
 		await user.dblClick(screen.getByText("My Workspace"));
 		const input = screen.getByLabelText("Workspace title");
@@ -80,7 +91,7 @@ describe("WorkspaceCard", () => {
 		const user = userEvent.setup();
 		const store = fakeStore() as unknown as WorkspaceStore;
 		render(WorkspaceCard, {
-			props: { ws: fakeEntry({ defaultCwd: "/old" }), store, onNavigate: vi.fn() },
+			props: { ws: fakeEntry({ defaultCwd: "/old" }), store, onNavigate: vi.fn(), computers: [] },
 		});
 
 		const input = screen.getByLabelText("Default working directory");
@@ -99,7 +110,7 @@ describe("WorkspaceCard", () => {
 		const user = userEvent.setup();
 		const store = fakeStore() as unknown as WorkspaceStore;
 		render(WorkspaceCard, {
-			props: { ws: fakeEntry({ defaultCwd: "/old" }), store, onNavigate: vi.fn() },
+			props: { ws: fakeEntry({ defaultCwd: "/old" }), store, onNavigate: vi.fn(), computers: [] },
 		});
 
 		const input = screen.getByLabelText("Default working directory");
@@ -113,7 +124,7 @@ describe("WorkspaceCard", () => {
 		const user = userEvent.setup();
 		const store = fakeStore() as unknown as WorkspaceStore;
 		const onNavigate = vi.fn();
-		render(WorkspaceCard, { props: { ws: fakeEntry(), store, onNavigate } });
+		render(WorkspaceCard, { props: { ws: fakeEntry(), store, onNavigate, computers: [] } });
 
 		await user.click(screen.getByRole("link", { name: "Open" }));
 		expect(onNavigate).toHaveBeenCalledWith("/my-ws");
diff --git a/src/features/workspaces/ui/WorkspacesHome.svelte b/src/features/workspaces/ui/WorkspacesHome.svelte
index 5894f0a..bdfd023 100644
--- a/src/features/workspaces/ui/WorkspacesHome.svelte
+++ b/src/features/workspaces/ui/WorkspacesHome.svelte
@@ -1,10 +1,16 @@
 <script lang="ts">
 	import { onMount } from "svelte";
+	import type { ComputerEntry } from "@dispatch/wire";
 	import type { WorkspaceStore } from "../store.svelte";
 	import { isValidSlug, workspacePath } from "../logic/route";
 	import WorkspaceCard from "./WorkspaceCard.svelte";
 
-	let { store, onNavigate }: { store: WorkspaceStore; onNavigate: (path: string) => void } = $props();
+	let {
+		store,
+		onNavigate,
+		computers,
+	}: { store: WorkspaceStore; onNavigate: (path: string) => void; computers: readonly ComputerEntry[] } =
+		$props();
 
 	onMount(() => {
 		void store.refresh();
@@ -78,7 +84,7 @@
 		{:else}
 			<ul class="flex flex-col gap-2">
 				{#each store.list as ws (ws.id)}
-					<WorkspaceCard {ws} {store} {onNavigate} />
+					<WorkspaceCard {ws} {store} {onNavigate} {computers} />
 				{/each}
 			</ul>
 		{/if}