Fail adding remote machine for new install

[jeyrb]

• Installed latest bb via get-bb.app download (0.38.0)
• In settings, chose Add Machine

Following cmd generated

curl -fL --progress-meter --connect-timeout 10 --max-time 60 --retry 2 http://127.0.0.1:38886/install.sh | sh -s -- --join-code bbde_NXKSbuLNhIWuWkTtqBrnZkvnFltREDACTylfKjXsTlnmpfZtRSGuhYLkpHWINFUs --host-id host_ufzfjur8m2 --server http://127.0.0.1:38886

Two issues - localhost in URLs provided to run on remote linux box, and secondly the port is only opened on the MacBook on localhost, so isn't accessible if the IP address manually changed to the MacBooks ip

[SawyerHood]

Reproduction & root-cause report: https://get-bb.github.io/reports/issues/1690.html

• Verdict: REPRODUCED · root-cause confidence: high
• Root cause (short): AddMachineDialog collapses an unpaired/absent connect plugin to null and pairingCommand() silently falls back to the system-config serverUrl, which on a fresh desktop install is the loopback-bound http://127.0.0.1:38886, so it prints a curl installer no other machine can reach without telling the user to set up Remote access first.
• Linked PR review: Explain unreachable loopback server in the Add machine dialog #1695 → REQUEST CHANGES (minor) — Every 503 from the connect RPC is classified as transient 'unavailable'; a disabled connect plugin returns 503 'not running (status: disabled)', so the user gets 'Remote access isn't ready yet.' + a Try again dead end and the 'Waiting for the machine to connect…' spinner, with no link to enable the
• Proposed fix: In AddMachineDialog: distinguish connect unpaired/absent/disabled from transient failure; when no connect machine code exists and the direct serverUrl hostname is loopback/unspecified, render an explanatory notice linking to /settings/plugins/connect and docs instead of a curl command, and hide the 'Waiting for the machine to connect…' box (PR Explain unreachable loopback server in the Add machine dialog #1695 does this; extend it to treat 503 'status: disabled' as unpaired). Optionally expose the server bind host in GET /system/config so reachability is server-owned rather than a client hostname heuristic.
• Caveats: The reporter's second observation (Mac port bound to loopback only) is intentional behaviour since Bind the bb server to loopback by default #1125, not a bug; the fix is guidance to bb connect/Tailscale Serve, not a LAN bind. Live repro was on a Linux dev instance (direct URL http://localhost:20022) rather than a packaged macOS desktop app; the desktop path yields http://127.0.0.1:38886 by construction (apps/desktop/src/types.ts) and the …

The report has copy-paste repro steps, screenshots where the bug is visual, code permalinks at 16ceb3a54, and repro artifacts. It was independently re-run by a second agent (see its Verification section).

AGENT GENERATED: by Claude Opus 5