fix: Multi-Device Test Orchestration (v1)

[droid-ash]

Summary

FinalRun currently supports only single-device AI-driven mobile tests, so modern multi-actor flows (chat send/receive, parallel login, shared docs) can't be validated end-to-end — cross-device causality is lost when split into two single-device runs. This change adds feature-gated multi-device orchestration (v1: exactly 2 Android devices, auto-assigned, fail-fast) with active-device-scoped capture so the planner reasons about ${devices.alice} and ${devices.bob} actions in a unified timeline. Single-device paths (Android and iOS) remain byte-identical — all changes are additive and gated on manifest.multiDevice / multi-device/ path prefix.

Changes

• Scope (hard-validated at loader time)
• New workspace shape
• New CLI routing
• Active-device-scoped orchestrator loop
• Sibling planner types and prompt
• Non-breaking RecordingManager fix
• Per-device artifacts
• Sandwich UI (report-web)
• Per-device video sync math
• Fail-fast semantics
• Phased delivery

Change

ID	Name	Issue
1mzp	260415-1mzp-multi-device-orchestration	—

Stats

Type	Confidence	Checklist	Tasks	Review
fix	4.1 / 5.0	45/45 ✓	29/30	Pass (1 iterations)

intake → spec → tasks → apply → review → hydrate

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 947542b8-0650-4a77-ad48-1fd43be3df89

📥 Commits

Reviewing files that changed from the base of the PR and between 0e0b55a and e2606c7.

📒 Files selected for processing (46)

• docs/memory/cli/index.md
• docs/memory/cli/multi-device-orchestration.md
• docs/memory/cli/multi-device-workspace.md
• docs/memory/common/index.md
• docs/memory/common/multi-device-models.md
• docs/memory/device-node/index.md
• docs/memory/device-node/recording-manager.md
• docs/memory/goal-executor/index.md
• docs/memory/goal-executor/multi-device-planner.md
• docs/memory/index.md
• docs/memory/report-web/renderers.md
• fab/changes/260415-1mzp-multi-device-orchestration/.history.jsonl
• fab/changes/260415-1mzp-multi-device-orchestration/.status.yaml
• fab/changes/260415-1mzp-multi-device-orchestration/checklist.md
• fab/changes/260415-1mzp-multi-device-orchestration/intake.md
• fab/changes/260415-1mzp-multi-device-orchestration/spec.md
• fab/changes/260415-1mzp-multi-device-orchestration/tasks.md
• packages/cli/src/checkRunner.ts
• packages/cli/src/multiDeviceSessionRunner.ts
• packages/cli/src/multiDeviceTestCompiler.test.ts
• packages/cli/src/multiDeviceTestCompiler.ts
• packages/cli/src/multiDeviceTestLoader.test.ts
• packages/cli/src/multiDeviceTestLoader.ts
• packages/cli/src/multiDeviceTestRunner.ts
• packages/cli/src/reportServerManager.test.ts
• packages/cli/src/testRunner.ts
• packages/cli/src/testSelection.ts
• packages/cli/src/workspace.ts
• packages/common/src/constants.ts
• packages/common/src/index.ts
• packages/common/src/models/MultiDeviceConfig.ts
• packages/common/src/models/RunManifest.ts
• packages/common/src/models/TestResult.ts
• packages/device-node/src/device/Device.ts
• packages/device-node/src/device/RecordingManager.test.ts
• packages/device-node/src/device/RecordingManager.ts
• packages/goal-executor/src/ActionExecutor.test.ts
• packages/goal-executor/src/MultiDeviceOrchestrator.ts
• packages/goal-executor/src/ai/AIAgent.ts
• packages/goal-executor/src/ai/VisualGrounder.ts
• packages/goal-executor/src/ai/multiDevicePlanner.test.ts
• packages/goal-executor/src/index.ts
• packages/goal-executor/src/prompts/multi-device-planner.md
• packages/goal-executor/src/prompts/visual-grounder.md
• packages/report-web/src/artifacts.ts
• packages/report-web/src/renderers.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch 260415-1mzp-multi-device-orchestration

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[droid-ash]

Closing — feature scrapped per request.