vinkius-labs/mcp-fusion

Fixed

• FSM race condition in serverless — Concurrent requests shared mutable FSM state, corrupting session data. Added StateMachineGate.clone() for per-request isolation when fsmStore is present.

• Underscore parsing breaks Inspector topology — startServer.ts split flat tool names by '_', misattributing groups for tools like user_accounts_list. Now uses builder.getName() directly.

• Same underscore bug in telemetry — ServerAttachment.ts used split('_') for route events, producing incorrect telemetry attribution. Now resolves via exposition routing map.

• ** createGroup.execute() throws instead of returning ToolResponse** — Unknown actions threw Error and Zod validation threw ZodError, violating the Promise<ToolResponse> contract. Now returns toolError() with INVALID_PARAMS code.

• schema.strict() re-allocated per call — Strict schemas now pre-computed at group creation time.

Test Suite

• 55 new regression tests across 6 test files covering FSM concurrency isolation, underscore parsing correctness, and createGroup contract compliance.
• 3340 total tests passing across 128 test files.