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From faultline
Inspects Faultline APM traces — lists slow endpoints or drills into a specific trace's span breakdown, flagging N+1 queries and dominant spans.
npx claudepluginhub dlt/faultline --plugin faultlineHow this skill is triggered — by the user, by Claude, or both
Slash command
/faultline:traceThe summary Claude sees in its skill listing — used to decide when to auto-load this skill
Investigate APM traces using `list_traces` and `get_trace`.
Queries OpenTelemetry distributed traces from Axiom by trace ID, errors, latency, or service. Helps debug distributed system issues.
Investigates distributed application performance using PostHog APM (OpenTelemetry span) data via MCP. Use for service traces, slow HTTP/database spans, error spans, trace IDs, or span attributes.
Analyzes Lensflare traces span-by-span, explaining timing, errors, and parent/child structure. Use for debugging slow requests, error post-mortems, or production traces via trace ID.
Share bugs, ideas, or general feedback.
Investigate APM traces using list_traces and get_trace.
Decide which mode from $ARGUMENTS:
No args or an endpoint string (e.g. UsersController#show):
list_traces with slow_only: true and the endpoint filter if one was given.id | endpoint | duration_ms | db_runtime_ms | db_query_count | created_at.get_trace directly on the slowest one if a single result.A numeric trace id:
get_trace with id.If either tool returns "APM is disabled. Set enable_apm = true to use trace tools.", tell the user to set c.enable_apm = true in their Faultline initializer. If it returns "APM tables not present", the migration hasn't been run yet.