feat(devices): connect simulator hosts over SSH by juliusmarminge · Pull Request #10856 · pingdotgg/t3code

juliusmarminge · 2026-09-08T23:26:46Z

Connect simulator hosts over SSH from Settings → Projects after selecting one environment. Users can probe, save, edit, and remove hosts using that environment's SSH keys and configuration.

The SSH adapter installs the pinned device hub on first use, starts agent tools only after separate agent-access consent, forwards their loopback endpoints, reconnects after transport failure, and cleans up its owned helpers and tunnels when a host is removed. Discovery, streaming, and control use the existing host-aware device APIs. EAS, app delivery, and Metro forwarding are outside this milestone.

Validation:

Rebased-stack verification: device/MCP tests, server and web typechecks, and targeted lint pass. The real web client passed SSH probe, save, reload, edit, and removal against disposable state. The Mac mini probe reports iOS and Android available; streaming and gestures were not repeated.
Focused device, MCP, authorization, and settings tests pass. The final integrated device/MCP/client run passed 58 tests, including concurrent remote startup, failed agent activation cleanup, and host replacement races. Server and web typechecks pass; targeted lint has no errors.
Live cups → Mac mini: probe, helper installation, 13 iOS devices discovered, remote argv/stdin fidelity, agent CLI discovery, forced tunnel disconnect/reconnect, and scoped cleanup passed.
Browser: SSH probe, save, reload, edit, and remove passed against an isolated server.
Android SDK probing passed, but no Android emulator was booted; live video streaming and gestures were not exercised in this pass.

Before:

After:

Current rebased head, after saving and probing the host:

Implemented with GPT-6 in Codex.

Summary by CodeRabbit

New Features
- Added support for configuring and managing SSH-hosted iOS and Android devices.
- Added device host settings for adding, editing, removing, and testing remote connections by environment.
- Added host status, platform availability, reconnection, and error visibility.
- Added host filtering and status details to device listings.
- Added validation for host targets, ports, IDs, and identity files.
- Improved remote device session and agent connectivity handling.
Documentation
- Added guidance for SSH host setup, requirements, discovery, reconnection, and limitations.

github-actions · 2026-09-08T23:28:39Z

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

ℹ️ No successful main baseline artifact is available yet. This run establishes the initial measurement.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	—	13.6 KiB	—	15.1 KiB	✅
Codex	Thread snapshot wire	—	7.0 KiB	—	7.3 KiB	✅
Codex	Live turn WebSocket wire	—	6.6 KiB	—	7.8 KiB	✅
Codex	Live turn WebSocket decoded	—	57.1 KiB	—	66.4 KiB	✅
Codex	Live turn messages	—	10	—	21	✅
Claude	Total thread wire	—	13.6 KiB	—	15.1 KiB	✅
Claude	Thread snapshot wire	—	7.1 KiB	—	7.3 KiB	✅
Claude	Live turn WebSocket wire	—	6.6 KiB	—	7.8 KiB	✅
Claude	Live turn WebSocket decoded	—	57.9 KiB	—	66.4 KiB	✅
Claude	Live turn messages	—	10	—	21	✅

Baseline: unavailable · PR result: a6c04e6 · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

Codex decoded thread snapshot: 113.9 KiB
Claude decoded thread snapshot: 114.6 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.

cursor · 2026-09-08T23:33:53Z

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macroscopeapp · 2026-09-08T23:38:33Z

Approvability

Verdict: Not approved

Macroscope's review found this PR not approvable — This PR introduces a large, user-facing SSH device-host integration with remote installation, process lifecycle, port forwarding, reconnection, and authorization changes. It also adds a product-setting default and suppresses static-analysis diagnostics in tests, so the runtime and policy implications warrant human review.

Not approved because:

Per-PR cost limit exceeded (workspace setting). Approvability relies on correctness review in order to determine eligibility

No code changes detected at a6c04e6. Prior analysis still applies.

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macroscopeapp · 2026-09-08T23:42:19Z

The probe translation at apps/server/src/device/DeviceService.ts:649 discards a structured DeviceHostError and copies its caller-visible message into another stringly error, losing the cause chain. Please pass the structured domain error through or widen the typed error channel instead of wrapping it as DeviceHostUnavailableError. This requires coordinated type changes, so no self-contained diff is feasible.

^{Posted via Macroscope — Effect Service Conventions}

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Actionable comments posted: 1

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Inline comments:
In `@apps/server/src/device/sshDeviceScript.ts`:
- Around line 131-132: Update apps/server/src/device/sshDeviceScript.ts lines
131-132 in the hub reuse check to also restart when hub.entryPath differs from
hubEntry. Update lines 160-163 to compare read(agentFile)?.entryPath with
agentEntry, stop any outdated daemon using its recorded entry, and write
agent.json only after the replacement daemon reports healthy; use the existing
hub and agent lifecycle symbols.

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📥 Commits

Reviewing files that changed from the base of the PR and between db54eee and 6a9e132.

📒 Files selected for processing (4)

apps/server/src/device/DeviceMultiHost.test.ts
apps/server/src/device/DeviceService.ts
apps/server/src/device/sshDeviceScript.test.ts
apps/server/src/device/sshDeviceScript.ts

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apps/server/src/device/DeviceMultiHost.test.ts

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cursor · 2026-09-09T00:51:03Z

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coderabbitai · 2026-09-09T23:08:19Z

Note

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@maria-rcks

## What's Changed * fix(ui): simplify multiple linked pull request badges by @maria-rcks in pingdotgg/t3code#11104 * fix(preview): return to pip when closing the right panel by @maria-rcks in pingdotgg/t3code#11102 * fix: quiet settled threads and simplify PR badges by @juliusmarminge in pingdotgg/t3code#11101 * fix(web): emphasize primary pull request actions by @juliusmarminge in pingdotgg/t3code#11105 * fix(web): prevent seams in the topbar scroll fade by @caezium in pingdotgg/t3code#10914 * fix(web): fit provider update text inside sidebar notices by @MatthewFeroz in pingdotgg/t3code#11034 * fix(web): align floating browser preview corners by @caezium in pingdotgg/t3code#10915 * fix(web): save PR body edits with Cmd/Ctrl+Enter by @flamboh in pingdotgg/t3code#10660 * fix(web): collapse a tool call by clicking its expanded label by @maria-rcks in pingdotgg/t3code#11017 * feat(devices): add simulator and emulator support by @juliusmarminge in pingdotgg/t3code#10677 * feat(devices): scope targets and sessions to their hosts by @juliusmarminge in pingdotgg/t3code#10854 * feat(devices): target concurrent agent sessions across hosts by @juliusmarminge in pingdotgg/t3code#10855 * feat(devices): connect simulator hosts over SSH by @juliusmarminge in pingdotgg/t3code#10856 * feat(web): use a compact right-panel surface menu by @maria-rcks in pingdotgg/t3code#11111 * fix(mobile): keep Android markdown icons aligned by @none23 in pingdotgg/t3code#11118 * fix(mobile): add close controls to tablet files and terminal by @juliusmarminge in pingdotgg/t3code#11115 * fix(mobile): preserve the final composer animation frame by @juliusmarminge in pingdotgg/t3code#11114 * fix(mobile): keep composer transitions aligned by @juliusmarminge in pingdotgg/t3code#11127 * refactor(mobile): name shared markdown renderer without iOS suffixes by @SunkenInTime in pingdotgg/t3code#11128 * fix(media): preserve playback during fullscreen transitions by @maria-rcks in pingdotgg/t3code#11113 * fix(marketing): redirect /app to app.t3.codes by @t3-code[bot] in pingdotgg/t3code#11145 * chore(marketing): update to 300k users and 22k stars by @t3-code[bot] in pingdotgg/t3code#11146 * feat(command-palette): show environments in search results by @Cyberlane in pingdotgg/t3code#10722 ## New Contributors * @Cyberlane made their first contribution in pingdotgg/t3code#10722 **Full Changelog**: pingdotgg/t3code@v0.0.41-nightly.20260910.1507...v0.0.41-nightly.20260911.1520 Upstream release: https://github.com/pingdotgg/t3code/releases/tag/v0.0.41-nightly.20260911.1520

Merges `upstream/main` at `02297e3db` into the fork, 35 commits from base `0f602b337`. Merge commit, not a rebase. Tracker entry: `docs/fork/upstream-merge-log.md`, 2026-09-11. `170` files landed against `166` in the upstream range; fork delta `756` files. The gap is six named files and reconciles: `ThreadStatusIndicators.test.tsx` and `sandboxControl.placement.test.tsx` landed as fork-test fixes amended into the merge, the three fork documents landed with it, and `PreviewLocalServerCard.tsx` was re-deleted per the inventory's deliberate-deletion list. `duplicate-adds.mjs` and `resolution-check.mjs` are clean — nothing landed as one side whole. ## What upstream shipped, and where it stands on Moatless ### Usable as-is These run on the fork's backend with no further work. - **A compact right-panel surface menu** (pingdotgg#11111) — the add-surface launcher goes from a card grid to keyboard-shortcut rows. This is where the fork's sandbox status badge lives, so the badge was re-stated on upstream's row rather than replayed; see the conflict notes below. - **Multiple-linked-PR badges, simplified** (pingdotgg#11104, pingdotgg#11180, pingdotgg#11101) — a thread with several links now shows the total linked count coloured by aggregate status, instead of naming a primary and counting the extras. This is **live on Moatless**: the backend serves `thread.pullRequests` and reports `threadPullRequests`, so the badge resolves. It is also a behaviour change a user will see, and it is what broke the fork's own badge test — the only thing that caught it. - **Settled threads recede in the sidebar** (pingdotgg#11101) — a settled row dims until hover or focus. Rides the settlement state Moatless already serves. - **Environments in the command palette** (pingdotgg#10722) — searching now returns environments beside threads and projects, with a subtitle. - **A blue/orange diff palette** (pingdotgg#10671) — client-side theme only. - **Question answers folded into tool activity** (pingdotgg#11014) — the chat timeline renders an answer to an agent's async question inside the tool call that asked it, rather than as a separate turn. The client half (`client-runtime/src/work-log/userInput.ts`, `shared/src/toolActivity.ts`, `MessagesTimeline.tsx`) works off data Moatless already sends. The server half is in the third bucket. - **Unpriced model activity is flagged** (pingdotgg#11021) — usage rows with tokens and no price read as unpriced instead of `$0.00`. Shared merge logic over the `server.getUsageSummary` the backend serves. - **Return to picture-in-picture when the right panel closes** (pingdotgg#11102) and **aligned floating-preview corners** (pingdotgg#10915) — both land in the hosted preview surface and both were taken; the fork's framed-runtime condition in `ThreadPreviewMiniPlayer.tsx` still covers the case upstream's `framed` check does not. - **Collapse a tool call by clicking its expanded label** (pingdotgg#11017), **provider update text fitting inside sidebar notices** (pingdotgg#11034), **no seams in the topbar scroll fade** (pingdotgg#10914), **centered PR unavailable states** (pingdotgg#11110), **no sidebar PR link icon** (pingdotgg#11179). - **Mobile** (pingdotgg#11128, pingdotgg#11127, pingdotgg#11114, pingdotgg#11115, pingdotgg#11118 / pingdotgg#11079 / reverted in pingdotgg#11098, pingdotgg#11113) — shared markdown renderer rename, composer transition and final-frame fixes, tablet close controls for files and terminal, and playback preserved across fullscreen transitions. ### Unsupported in Moatless / needs implementation - **The device hub** — the whole of pingdotgg#10677, pingdotgg#10854, pingdotgg#10855 and pingdotgg#10856: iOS simulators and Android emulators a person and an agent can share. Server side is `apps/server/src/device/` (`LocalDeviceHost.ts` drives the machine the server runs on, `SshDeviceHost.ts` drives another over SSH, `DeviceHubProxy.ts` fronts the video and accessibility streams) plus an MCP toolkit at `apps/server/src/mcp/toolkits/device/` that gives the agent tap/type/screenshot. Client side is a `device` right-panel surface (`apps/web/src/components/device/`) and a Device hosts settings page. Eight methods plus one stream, all newly declaring `UnsupportedMethodError` in `packages/contracts/src/rpc.ts`: `device.configure`, `device.list`, `device.testHost`, `device.open`, `device.close`, `device.shutdown`, `device.detail`, `device.action`, and the `subscribeDeviceState` push stream. **Nothing gates the surface on a capability.** `ChatView.tsx` passes `deviceAvailable={activeThreadRef !== null}`, so the launcher offers a Device row on every thread. `subscribeDeviceState` never resolves on Moatless, so the state stays empty, `onboardingCompleted` is false, and clicking the row opens `DeviceSetup` rather than the panel — whose first step, "Enable the device hub", calls `device.configure` and shows the refusal. A dead end a person can walk into. One additive `FEATURES.deviceHub` read on the two `deviceAvailable` props would drop the row instead; **this merge did not add it**, and it is recorded as the open work in `docs/fork/gaps.md` under _The device hub_. Implementing it on the backend is a real question rather than a stub: the hub needs Xcode or the Android SDK on whatever host it drives, and its stream is a second connection beside the RPC one. - **Label and reviewer updates without redundant reloads** (pingdotgg#11117) — optimistic cache writes in `client-runtime/src/state/pullRequests.ts` over `pullRequests.update`. Rides the `pullRequests.*` group, which Moatless does not serve and which the `pullRequests` capability already keeps off, so it changes nothing here until that group lands. - **Emphasised primary PR actions** (pingdotgg#11105) and **save a PR body with Cmd/Ctrl+Enter** (pingdotgg#10660) — same surface, same condition. - **Zed remote links accepting root paths and Windows servers** (pingdotgg#11044) — builds an SSH open target the Electron shell hands to a local editor. That path needs a desktop shell, so it does not reach this fork's browser client; `shell.openInEditor` remains unsupported. Not a fork target, listed for completeness. - **Marketing** (pingdotgg#11146, pingdotgg#11145) — `apps/marketing` is upstream's own site; inherited and inert here. ### Backend behavior to consider reproducing in Moatless Server-side fixes upstream made to its own runtime. Moatless implements the same contract, so each is worth checking against its own implementation. - **Claude launch args override the derived permission mode** (pingdotgg#11026, `apps/server/src/provider/Layers/ClaudeAdapter.ts`). Upstream derives a permission mode from the thread's settings and then appends the agent's launch args; an explicit `--permission-mode` in those args used to be overridden by the derived one instead of winning. If Moatless derives a permission mode the same way, a user who set the flag explicitly is being ignored in the same place. Cheapest of the three to check. - **Project identity resolved before legacy PR relinks** (pingdotgg#11045, `apps/server/src/orchestration/Layers/OrchestrationEngine.ts`). A legacy pull-request link is relinked to its thread on load; upstream now resolves the project's repository identity first, so a relink cannot bind a link to the wrong project when two projects share a branch name. The fork fills `thread.pullRequests` from a Task's GitHub bindings, so it has the same ordering question: the binding has to know which project it belongs to before it is attached. - **Question answers in the published activity payload** (pingdotgg#11014, `apps/server/src/orchestration/ActivityPayloadProjection.ts`). The projection now folds `projectQuestionToolInput` into the activity payload for both `mcp_tool_call` and plain tool items, which is what lets a client render the answer inside the tool call. Moatless does not report `agentActivityPublishing`, so nothing reads this today — but if it ever publishes activity, this is the shape to publish. ## Conflicts and how they were resolved 11 conflicted files, resolved on the verdicts `preflight.mjs` printed. Additive on both sides, both kept: `MessagesTimeline.tsx` (imports), `client-runtime/src/rpc/client.ts` (the fork's four subscription tags against upstream's `subscribeDeviceState`), `rightPanelStore.ts` (the fork's `sandbox` kind against upstream's `device`), `rpc.ts` and `RpcAuthorization.ts` (the fork's thread-server / sandbox / subtasks methods and scopes against upstream's eight `device.*` ones), and `ChatView.tsx` (both right-panel arms, both `onAdd*` props at the inline and sheet call sites, and upstream's extended `closePreviewPanel` under the fork's proactive preview-open effect). `PreviewEmptyState.tsx` and `ThreadPreviewMiniPlayer.tsx` took upstream's `DiscoveryList` and `rounded-[inherit]` with the fork's sandbox-read error line and framed `hasPreviewSurface` condition re-stated on top. `PreviewLocalServerCard.tsx` was a modify/delete conflict and was re-deleted. `pnpm-lock.yaml` auto-merged this time, so `--theirs` had nothing to do; it was reset to `upstream/main` and the fork edges re-derived with `vp i`. Two findings worth reading: **A `converged` delta can lose the line it was anchored to.** pingdotgg#11111 rebuilt the add-surface menu from cards into rows, and the fork's sandbox badge in `RightPanelTabs.tsx` (7 conflicts, the hard one) had no literal home left. It was re-stated on upstream's row — between the label and the `Kbd`, additively, no prop threaded and no upstream JSX re-indented — rather than replayed. The fork's placement test caught the other half: upstream's rows stopped rendering the action `description` at all, in its own Device action too, so the test was asserting on markup nobody emits. It now asserts the rendered label. **A silent auto-merge changed behaviour with no marker, no type error and no resolution-check hit.** pingdotgg#11104 and pingdotgg#11180 changed what the multi-PR badge counts and hoisted `state` onto both badge shapes with a new `draft` colour. Only the fork's `ThreadStatusIndicators.test.tsx` failed, on `+1` against `+2`. Fixture gained the now-required `state`; the expectation was updated to upstream's semantics. ## Inventory and gaps - New `pathPolicy` rows for the paths this merge decided without a cached verdict: `right-panel-surfaces`, `client-runtime-rpc-client`, `thread-status-indicators`, `fork-sandbox-components`. `inventory-check.mjs` is clean. - New gaps entry: _The device hub_, under **Methods the backend does not dispatch**. It names the nine union entries holding it open, the missing `FEATURES.deviceHub` gate, and what closing it costs. - Owned-concern sweep: 11 keyword hits, all false positives. Ten are device-hub files matching the `client-identity` concern on `host`/`proxy` — that concern is about device *pairing* identity, not simulators — and the eleventh, `McpProviderSession.test.ts`, matched on `session`. No concern entry. ## Verification `verify.mjs`: `duplicate-adds`, `tripwires`, `resolution-check`, `unsupported-methods`, `fmt:check`, `lint` and `typecheck` pass. `test` is red on **one** package, and it is not this merge: `@t3tools/desktop`'s `scripts/browser-secret-native.test.mjs > bundled libsecret helper` cannot find `libsecret-1` in this sandbox's pkg-config path. A missing system package, not a code defect — 1 file failed of 102, and the standing entry is in `docs/fork/gaps.md` under _The desktop suite needs libsecret_. One thing to know about reading that log: four packages did not finish under `vp run -r test` and were each re-run alone — mobile `157` files, `t3` `315`, web `389`, relay `30`, all passing. The truncated parallel pass reported a failure that does not exist, `shikiReviewHighlighter.test.ts > initializes source and snippet highlighting without a warmup`, which passes in the alone run and which neither side of this merge touches. The retry lines at the end of the log are the result; the parallel output above them is not. Not reported green. The fork has no CI on pull requests (`docs/fork/gaps.md`, _Nothing checks a pull request_), so this is the whole of the evidence. --- Moatless task: https://moatless.soaplabstest.com/tasks/211b4f8f-7de2-46c8-9ded-330d0cda4add

github-actions Bot added vouch:trusted PR author is trusted by repo permissions or the VOUCHED list. size:XL 500-999 changed lines (additions + deletions). labels Sep 8, 2026

juliusmarminge changed the title ~~t3code/devices ssh~~ feat(devices): connect simulator hosts over SSH Sep 8, 2026

juliusmarminge force-pushed the t3code/devices-ssh branch from 669a8a0 to 02c5677 Compare September 8, 2026 23:33

juliusmarminge marked this pull request as ready for review September 8, 2026 23:33