Update dependency @mcp-b/webmcp-polyfill to v3

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@mcp-b/webmcp-polyfill (source)	2.3.2 → 3.0.0

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Release Notes

WebMCP-org/npm-packages (@​mcp-b/webmcp-polyfill)

v3.0.0

Major Changes

• 4f3cc5e: Track the May 27, 2026 WebMCP draft that moves the modelContext getter from Navigator to Document.

  • @mcp-b/webmcp-polyfill now installs document.modelContext as the canonical surface. navigator.modelContext is kept as a deprecated, backward-compatible alias that returns the same ModelContext instance and emits a one-time runtime deprecation warning on first access. Tools registered on either surface are observable on the other. Native detection now checks both surfaces so the polyfill no-ops when the browser exposes WebMCP on either.
  • @mcp-b/webmcp-types adds the Document.modelContext global augmentation and marks Navigator.modelContext as @deprecated. Chrome 150 deprecated navigator.modelContext and will remove it in a future release; the deprecated alias remains available in this release as a migration fallback.
  • Breaking: the removed provideContext() and clearContext() APIs remain absent from the strict WebMCP types and polyfill runtime. Consumers still calling those legacy APIs should migrate to explicit registerTool() and unregisterTool() calls.

  Migration:

  const modelContext = document.modelContext || navigator.modelContext;
  if (modelContext) {
    modelContext.registerTool({
      /* ... */
    });
  }

  Tracks webmachinelearning/webmcp#173 and webmachinelearning/webmcp#184.

Patch Changes

• Updated dependencies [4f3cc5e]
  • @​mcp-b/webmcp-types@​3.0.0

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