Trace Forge

Gives Claude write access to create structured execution traces with spans, tool calls, and decision logging. You get six tools: trace_start to begin tracking an agent task, trace_span for nested work units, trace_tool_call to log each tool invocation with duration and cost estimation, trace_decision to record reasoning and alternatives considered, trace_end to finalize with automatic metrics, and get_trace plus search_traces for retrieval. Stores everything locally via stdio transport. Built specifically for EU AI Act Article 14 compliance, which mandates traceability for high-risk AI systems starting August 2026. The only observability MCP that writes data instead of just reading it.