[nik13]

Summary

• Add a discoverable Scalekit Node.js guide using the published @traceai/fi-core tracer and the standard OpenTelemetry tool span API, without creating a single-call integration package.
• Capture success, tool-specific resolved failures, and thrown failures while preserving active agent context and omitting tool/account payloads and exception text.
• Cover the docs contract in the integration test suite.

Validation

• npm run test:integrations (25 passed).
• npm run build (Astro and Pagefind passed).
• Loopback OTLP receiver exercise with Scalekit 2.5.0 and 2.21.0 using synthetic credentials: each emitted nested tool spans with correct routing, status, and no private payloads.

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