[thymikee]

Cover the by-spec open that names no platform or lease backend

Follow-up to #3865. It merged at 576fd1a, before this test was pushed.

Problem

CI's changed-line coverage report for #3865 listed src/cli/commands/proxy-lease-device.ts:64 as uncovered. That is the refusal for an open that names a device spec (--os, --image-tag or --physical) without --platform or --lease-backend, so the proxy backend would not know which device family to pick from.

Change

proxy-lease-device-spec.test.ts gets one test: open --os 26 through a proxy connection with no platform fails with INVALID_ARGS before any allocate or device listing. Test-only.

Validation

• I temporarily changed the throw's error code at line 64, and the new test failed. So it reaches that line, not an earlier INVALID_ARGS.
• All 13 tests in the file pass.
• pnpm check:affected --run --head 2918ec1769 passed with exactCommit=true.

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated
agent-device-website	Ready	Preview	Oct 29, 2026 11:17am UTC

[cubic-dev-ai]

No issues found across 1 file

_{View guided diff | Turn on auto-fix | Re-trigger cubic}

[github-actions]

Size Report

Metric	Base	Current	Diff
Installed (including dependencies)	5.58 MB	5.58 MB	0 B
Package (unpacked)	5.58 MB	5.58 MB	0 B
Package (download)	1.70 MB	1.70 MB	-20 B

Startup median (7 runs, lower is better):

Scenario	Base	Current	Diff
CLI --version	33.7 ms	36.0 ms	+2.3 ms
CLI --help	67.6 ms	69.3 ms	+1.7 ms

[thymikee]

The code looks good at 2918ec1. The new test covers the by-spec open that names no platform or lease backend, and from reading the code it would fail if the refusal were removed. CI is green, with all 18 checks passing, and there are no conflicts. I did not run the test or a mutation that removes the refusal, and I only read connection-runtime.ts around lines 335-349 for other INVALID_ARGS throws on this route.

Not blocking: the matcher at https://github.com/callstack/agent-device/blob/2918ec1/src/cli/commands/__tests__/proxy-lease-device-spec.test.ts#L116 is only { code: 'INVALID_ARGS' }, so another INVALID_ARGS thrown earlier on this route would also pass. You can add message: /requires --platform or --lease-backend/ to pin it, or leave it as is.