Bump @ag-ui/client 0.0.53 -> 0.0.55 across 8 starter example packages and
add npm overrides pinning @ag-ui/{client,core,encoder,proto} to 0.0.55 so
each install resolves a single @ag-ui tree. The mastra starter receives the
same bump alongside its dist-tag pin fixes in a separate commit.
Conflict resolutions:
- contract test: keep the rollout's parameterized version and add
strands-python to migratedIntegrations/appRoots (60/60 passing) in
place of her bespoke MIGRATED_INSTANCES file
- parity manifest: rollout's version with strands' three threads-shield
allowances removed (mirrors the langgraph-fastapi migration); parity
verify green — strands now 88 tracked files, zero drift
- package-lock: regenerated at 1.59.3 (a2ui-renderer stays 1.56.5,
the family-wide pin shared with the north-star)
Also rides: her react-core A2UIMessageRenderer test flake fix
(act -> waitFor), kept intentionally.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>