Tests reproduce issue 23151: a Claude Code SessionStart hook that runs past 90 s makes ClaudeAgentSdkQueryRunner.open fail with "Claude Code did not answer the MCP server registration." Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Julius Marminge committed on 10/21/2026, 11:42:53 PMparentb5a226e
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