[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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[pubkey]

@copilot

  ✔ migration with multiple collections (38ms)

webmcp.test.ts
[WebMCPPolyfill] navigator.modelContext is deprecated. The May 27, 2026 WebMCP draft moved the modelContext getter from Navigator to Document — use document.modelContext instead. See webmachinelearning/webmcp#184.
✔ should register query tool when registerWebMCP is called
[WebMCPPolyfill] navigator.modelContext.unregisterTool() is deprecated. The April 23, 2026 WebMCP draft removed it in favor of registerTool(tool, { signal }) — pass an AbortSignal and abort it to unregister.
1) should wait for changes using wait_changes tool

1323 passing (2m)
1 failing

1. webmcp.test.ts
   should wait for changes using wait_changes tool:
   TypeError: Cannot read properties of undefined (reading 'listTools')
   at getTools (file:///home/runner/work/rxdb/rxdb/test/unit/webmcp.test.ts:27:62)
   at Context. (file:///home/runner/work/rxdb/rxdb/test/unit/webmcp.test.ts:107:23)

[Copilot]

@copilot

  ✔ migration with multiple collections (38ms)

...

Fixed in d831b4d. I reset the WebMCP polyfill state between tests (cleanupWebMCPPolyfill() in beforeEach/afterEach) so navigator.modelContextTesting is reliably reinstalled, and the wait_changes test now passes.

[renovate]

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