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fix(server): let operators set the SSH host for open-in-editor links - #11207
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ApprovabilityVerdict: Not approved Macroscope's review found this PR not approvable — This PR adds an opt-in remote editor capability and changes shared server configuration and contract boundaries, while preserving existing behavior when the setting is absent. The implementation is focused and tested, but the cross-owner shared-code changes warrant human review. You can add or adjust custom eligibility rules. Learn more. |
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📝 WalkthroughWalkthroughAdds ChangesRemote editor host configuration
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant Desktop
participant WSL
participant ServerConfig
participant RemoteOpenTargets
Desktop->>WSL: forward T3CODE_REMOTE_OPEN_HOST through WSLENV
WSL->>ServerConfig: provide remoteOpenHost
ServerConfig->>RemoteOpenTargets: yield remoteOpenHost
RemoteOpenTargets->>RemoteOpenTargets: probe discovered targets
RemoteOpenTargets->>Desktop: return configured host before probed targets
Suggested reviewers: Merge Risk: 🟡 Moderate · up to When a configured SSH host is set, open-in-editor links can still advertise discovered server addresses instead of only the operator-provided SSH alias. This prevents the setting from reliably enforcing the intended client SSH configuration and should be corrected before merge. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Inline comments:
In `@apps/server/src/environment/RemoteOpenTargets.ts`:
- Around line 39-45: Update RemoteOpenTargets.resolveTargets so configured-only
targets are returned only when the client supports the configured target kind;
otherwise preserve a compatible fallback target or negotiate capability before
returning. Ensure older clients still receive a usable Open target and
resolveRemoteOpenState does not receive an empty array when remoteOpenHost is
set.
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apps/server/src/cli/config.tsapps/server/src/config.tsapps/server/src/environment/RemoteOpenTargets.test.tsapps/server/src/environment/RemoteOpenTargets.tsdocs/user/remote-access.mdpackages/contracts/src/editor.ts
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Remote open-in-editor links only ever used a host the server guessed for itself: the tailnet MagicDNS name or <hostname>.local. Clients on another network cannot resolve the mDNS name, and a bare hostname cannot carry a non-default SSH port or user, so the only workaround was an ssh config alias on every client that shadows the guessed name. T3CODE_REMOTE_OPEN_HOST names the host to advertise. When set, the server advertises it alone as a target of the new kind 'configured' and skips the sshd and Tailscale probes. Pointing it at an ssh config alias lets the viewer's own ~/.ssh/config supply user, port, key and ProxyCommand. Proposed in pingdotgg#10326; same root cause as pingdotgg#10906.
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Inline comments:
In `@apps/server/src/environment/RemoteOpenTargets.ts`:
- Around line 79-83: Change resolveTargets so a defined remoteOpenHost returns
only the configured target without evaluating probeTargets; select the
configured-host response effect before the probe effect is constructed or
executed. Preserve probe-based targets only for the undefined-host path, and do
not add fallback behavior without explicit client capability negotiation.
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apps/desktop/src/backend/DesktopBackendConfiguration.test.tsapps/desktop/src/backend/DesktopBackendConfiguration.tsapps/server/src/environment/RemoteOpenTargets.test.tsapps/server/src/environment/RemoteOpenTargets.tspackages/contracts/src/editor.ts
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Another use case for this: my desktop connects to T3 through a manually managed SSH tunnel over the local private network. Tailscale remains enabled on the server for phone access, so T3 still advertises its I worked around this by mapping that hostname to the VM’s private IP in my desktop SSH config. An explicit editor SSH-host setting would let me select the intended route independently of the T3 connection and retained Tailscale access. |
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| export const make = Effect.gen(function* () { | ||
| const spawner = yield* ChildProcessSpawner.ChildProcessSpawner; | ||
| const net = yield* NetService.NetService; | ||
| const { remoteOpenHost } = yield* ServerConfig; |
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Import the local service module as a namespace and acquire it through its public tag (ServerConfig.ServerConfig). The new yield* ServerConfig uses a named service import, which loses the module boundary convention. This needs changes at both the import and acquisition sites.
Posted via Macroscope — Effect Service Conventions
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What Changed
Adds a
T3CODE_REMOTE_OPEN_HOSTserver setting. When set, the server advertises it as the first remote open-in-editor target, with a newRemoteOpenTargetkindconfigured, ahead of the probed Tailscale and mDNS names. The desktop app forwards it into WSL backends alongside the provider keys. A short paragraph in the remote access guide explains when to set it.Why
From a browser or desktop client on another machine, "Open in editor" builds a
vscode://vscode-remote/ssh-remote+<host>/...link using a host the server guessed for itself: the Tailscale MagicDNS name, or else<hostname>.local. Without Tailscale, clients on another network cannot resolve the mDNS name (#10906). Even when a name resolves, thevscode-remoteURI cannot carry a non-default SSH port or user. The only workaround was an ssh config alias on every client that shadows the guessed name.This is the operator-declared host proposed in #10326. Pointing it at an ssh config alias lets the viewer's own
~/.ssh/configsupply user, port, key and ProxyCommand, so nouser@hostwire form is needed.The probed names stay in the list after the configured one. Clients that know the
configuredkind take the first entry; older clients drop the unknown kind throughForwardCompatibleArrayand keep exactly the target they had before, so no client change is required.Verified with
vp test run apps/server/src/environment/RemoteOpenTargets.test.ts apps/desktop/src/backend/DesktopBackendConfiguration.test.ts, typecheck ofpackages/contractsandapps/server, and focusedvp fmt --checkandvp linton the changed files.Model: Claude Fable 5.1
Harness: Claude Code in T3 Code
Checklist
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Summary by CodeRabbit
New Features
Documentation