[March-7]

When multiple AppBridge views share one MCP Client, each connection replaces the client's tools/resources/prompts list-change handlers. Earlier views stop receiving updates, and closing the newest view leaves forwarding pointed at a closed connection.

Share one dispatcher per client and notification method. Forward only to Apps-ready views, and remove each bridge's subscription on local or remote disconnect and failed connection setup. Reconnecting a bridge does not duplicate subscriptions or replace the user's onclose callback.

Automatic forwarding still owns the single-handler slots on first use and replaces any pre-existing handlers. If a caller later replaces a slot, bridge joins, closes and reconnects leave that handler in place; automatic forwarding for that method stays superseded. Empty dispatcher sets are retained to avoid removing or reinstalling a caller-owned handler. Hosts needing custom forwarding can continue to pass null as the client.

Validation:

• Same 10 new transport-level regressions: 10 fail on base, 10 pass with this patch. Covers all three methods, shared/separate clients, close order, handshake readiness, connection failures, reconnects and later caller handlers.
• All 255 SDK tests pass across all 9 SDK test files, including published-v1 interop. The unchanged independent observation script improves from 13/20 to 20/20 checks.
• tsc --noEmit passes with the repository's full tsconfig, including the new regression tests, React sources and documentation examples. The unchanged build.bun.ts completes declaration emission and all six JavaScript bundle entry points.
• Prettier 3.7.4 checks both changed files successfully. Bun 1.3.10, TypeScript 5.9.3 and the other checked tool/SDK/type packages (17 packages in total) match their corresponding upstream lockfile versions and integrity values; local Node is 24.19.0 on macOS arm64.
• Example-server suites, browser E2E, cross-platform CI and the schema/snippet-generation steps of npm run build were not run.

AI assistance: OpenAI Codex generated the implementation, tests and this description. This disclosure does not claim independent human review.