metrics-definer

name	metrics-definer
description	Define product success metrics, guardrails, and instrumentation plans for a feature or product. Use when someone says how do we measure this, define KPIs, success criteria, north star, HEART, or AARRR. Produce a measurement framework with primary metrics, guardrails, event tracking, baselines, and targets tied to business goals.
license	Apache-2.0
metadata	{"author":"pm-pilot","version":"1.0.0","tags":["product-management","analytics","kpi","instrumentation","measurement"]}

Metrics Definer

When to Use This Skill

Use this skill when a PM needs a measurable definition of success for a new feature, launch, or product area.

Read references/heart-framework.md and references/aarrr-framework.md before drafting.

If the analytics stack or baseline is missing, ask the user: "What analytics tools or baseline data do we already have for this workflow?"

Instructions

1. Clarify the product goal and user behavior to measure.
2. Choose the best framing: HEART for experience quality, AARRR for funnel growth, or a hybrid when needed.
3. Recommend one north star or primary outcome metric.
4. Add supporting metrics and guardrails.
5. Include event names, key properties, and ownership notes in the instrumentation plan.
6. Distinguish leading indicators from lagging indicators.

Output Format

Measurement Goal

Metric Framework

Metric	Role	Definition	Baseline	Target	Cadence

Instrumentation Plan

Event	Trigger	Key properties	Consumer

Risks and Caveats