perf: speed up device inventory and status

[thymikee]

Summary

• overlap Apple simulator and physical-device discovery for unscoped inventory, reducing the same-run Apple critical path from about 2.39s to 1.53s
• classify advisory device claims from one batched process snapshot instead of two synchronous ps launches per live claim; 159-claim status improved from 2.66s to 0.14s
• keep device results atomic for JSON, SDK, and MCP consumers; partial-result streaming was evaluated but would complicate agent merge semantics without reducing completion latency

The change touches 9 files and stays within the devices/device-status command family and their shared process-liveness seam. No docs or skills changed because command syntax, output shape, and workflow guidance are unchanged.

Validation

pnpm check:affected --run passed immediately before push: 296 test files / 2,655 tests, 95% changed-line coverage, plus format, lint, typecheck, layering, Fallow, build, interaction contracts, and provider integration.

Regression evidence: the Apple concurrency test failed before the production change because only simctl started while simulator discovery was blocked; it passes with physical discovery starting concurrently. Batched process observation is covered by a one-ps-call test and fail-closed missing-observation coverage.

Manual host timing used the real Apple device services and 159 advisory claims. Cold CoreDevice startup remains externally variable and produced one ~11s outlier; the fix removes serialized simulator latency from that path rather than caching potentially stale inventory.

[github-actions]

Size Report

Metric	Base	Current	Diff
JS raw	2.13 MB	2.13 MB	+951 B
JS gzip	695.5 kB	695.7 kB	+295 B
npm tarball	826.8 kB	827.0 kB	+228 B
npm unpacked	2.88 MB	2.88 MB	+951 B

Startup median (7 runs, lower is better):

Scenario	Base	Current	Diff
CLI --version	27.2 ms	28.3 ms	+1.1 ms
CLI --help	66.2 ms	69.2 ms	+3.0 ms

Top changed chunks:

Chunk	Raw diff	Gzip diff
dist/src/internal/daemon.js	0 B	-1 B
dist/src/screenshot-result.js	0 B	+1 B
dist/src/runner-disposal.js	0 B	-1 B

[thymikee]

Reviewed exact head 117fba48d9. No actionable findings. Unscoped Apple inventory now overlaps simulator and physical discovery while preserving simulator-only, simulator-set, and UDID behavior; the concurrency regression is non-vacuous. Device-status claim inspection batches selected owner PIDs into one process snapshot while retaining fail-closed handling for missing/failed observations and unchanged public output. The change is code-review clean. All completed checks are green; iOS Smoke is still running, so final merge remains gated on that authoritative lane.

[github-actions]

PR Preview Action v1.8.1
Preview removed because the pull request was closed.
2026-08-11 05:38 UTC