Three docs under docs/testing/:
* README.md — layer-by-layer reference (what each covers, the
runner, how to invoke, local vs CI flow). Points at the load-
bearing startup gate and the client-side-only constraint so a
macOS clone runs the same suite as Linux.
* a11y-manual.md — 15-minute manual checklist run at every tier
cut. Orca on Linux, VoiceOver on macOS. Catches prose drift
automation can't judge.
* claude-ui-workflow.md — how Claude Code drives the WASM build
through Playwright, including the `flt-semantics-placeholder`
quirk (semantics are opt-in in Flutter web; the driver
auto-clicks the placeholder to enable them).
Co-Authored-By: Claude <noreply@anthropic.com>
