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A field guide to the /lumen-metrics skill

AI Product Metrics Architecture

Metrics architecture drifts without intent. /lumen-metrics designs North Star, input metrics, operational metrics, and guardrails with definitions, owners, cadence, and triggers.

Lumen · Product Analytics5 min readDecember 15, 2025

Product metrics get added one at a time without architecture. The team tracks 47 metrics, none of which are clearly the most important. The North Star is implicit and disagreed-upon. Engineering health metrics live separately from product metrics and the trade-offs are invisible.

The /lumen-metrics skill designs the metrics architecture: North Star with rationale, input metrics that drive it, operational metrics for engineering health, and guardrail metrics that flag regressions. Each metric has a definition, owner, cadence, and action trigger.

Tonone's /lumen-metrics skill designs product metrics architecture with North Star, input metrics, operational metrics, and guardrails.

Install

/lumen-metrics ships with the Lumen agent in Tonone for Claude Code.

1. Add to marketplace

$ claude plugin marketplace add tonone-ai/tonone

2. Install Lumen

$ claude plugin install lumen@tonone-ai

Frequently asked questions

What does /lumen-metrics do?
It designs product metrics architecture with North Star, input metrics, operational, and guardrails.
How is /lumen-metrics different from /lens-metrics?
/lens-metrics is for analytics/BI metrics framework. /lumen-metrics is for product analytics, with input/output/guardrail structure tied to product decisions.
How do I install /lumen-metrics?
Install Tonone for Claude Code via tonone.ai/get-started.

Pairs well with