maintain-desktop-testing

# Maintain desktop testing packages | Owner | Entry | | --------------------------------------------- | ---------------------------------------------------------------------------- | | WebDriver service, clients, helpers | [`desktop-driver`](../../../packages/agentic/desktop-driver/AGENTS.md) | | App/suite config, lifecycle, WDIO, reporting | [`desktop-test`](../../../packages/agentic/desktop-test/AGENTS.md) | | Storybook integration, CLI, extraction, tests | [`storybook-desktop`](../../../packages/agentic/storybook-desktop/AGENTS.md) | | On-device bridge, Metro, theme, chrome | [`runtime`](../../../packages/agentic/storybook-desktop-runtime/AGENTS.md) | Read the owning package's `AGENTS.md`, then its contributing reference from the package index. The runtime has no contributing reference; use its `AGENTS.md` validation section and its runtime contract reference instead. ## Mode first - **Review/plan:** read-only. Do not implement, run write-mode formatting, build, create changesets, launch apps, or run native contracts. Report validation not run. - **Implementation:** continue below. ## Implementation 1. Change the lowest package that owns the behavior; update dependent references when needed. Preserve exact identity, fail-closed behavior, cancellation, ownership-safe cleanup, and explicit unsupported/skip status. Contract fixtures that spawn Node or generate specs pass values through arguments, not spliced source (R-SCAN-002). 2. For standalone Swift/C++ helpers, read the provider README and `native/PROTOCOL.md`; keep protocol schema and docs in sync. Apply `implement-native-component` as a native overlay. React-module and Office bridging-header steps do not apply to these standalone helpers. 3. Update owning references and affected README/AGENTS files in the same change. 4. Iterate with `yarn test <name>` for the files you change (R-VALID-004), then run package format, lint, build, and test. Native changes also need the matching-OS helper contract and affected consumer lane; JS tests do not qualify native behavior. 5. Add a patch changeset for each changed published package. Finish with `yarn clean-lage-cache` then `yarn lage buildci`. When delegating, pass the package AGENTS.md and selected reference paths; subagents do not inherit them automatically.