Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add cnfeat/top-pm-skills --skill writing-north-star-metricsgit clone --depth 1 https://github.com/cnfeat/top-pm-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/cnfeat/top-pm-skills/writing-north-star-metrics)<a href="https://agentmods.dev/skills/cnfeat/top-pm-skills/writing-north-star-metrics"><img src="https://agentmods.dev/badge/skills/cnfeat/top-pm-skills/writing-north-star-metrics/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/cnfeat/top-pm-skills/writing-north-star-metrics"><img src="https://agentmods.dev/badge/skills/cnfeat/top-pm-skills/writing-north-star-metrics.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00047 | $0.01027 |
| Opus 5 | $0.00023 | $0.00513 |
| Sonnet 5 | $0.00009 | $0.00205 |
| Haiku 4.5 | $0.00005 | $0.00103 |
Grade A, and why
writing-north-star-metrics scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 78 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Writing North Star Metrics
Help the user define their North Star metric using frameworks and insights from 27 product leaders.
How to Help
When the user asks for help with North Star metrics:
- Understand the value - Ask what specific value the product delivers to users (not revenue or internal activity)
- Test for simplicity - Ensure the metric can be understood and discussed by anyone in the company
- Check for actionability - Confirm teams can actually influence this metric through their work
- Add guardrails - Help them identify countervailing metrics that prevent gaming
Core Principles
Measure value delivered, not captured
Itamar Gilad: "The North Star metric measures how much value we create for the market. WhatsApp measured messages sent because every message is incremental value. Airbnb used nights booked." Select a metric that tracks core utility provided to the customer, not business extraction.
Avoid lagging indicators
Jess Lachs: "Retention is a terrible thing to goal on. It's almost impossible to drive in a meaningful way in a short term. Find a short-term metric you can measure that drives a long-term output." Identify proxy metrics that are sensitive to experimentation and correlate with long-term goals.
Simple beats sophisticated
Jess Lachs: "If people understand it, if they have an intuition around it, if it's something people can talk about across the company, it's going to be a much better metric than your made up composite score that nobody understands." Avoid composite metrics with complex coefficients.
Measure from the customer's perspective
Jeff Weinstein: "What was the value we're trying to produce for the customer, and can we measure it from their perspective? We suggested 'companies with zero support tickets.'" Define metrics based on the absence of friction or the presence of success moments.
A high-level mission simplifies decisions
Hari Srinivasan: "Everything at LinkedIn is a very connected ecosystem, but decisions aren't difficult because we're all here to help people connect to economic opportunity." A clear company-wide mission serves as the ultimate tie-breaker for product decisions.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 78 lines · 47 tokens per session scan A eb967e0d1f24
writing-north-star-metrics is a skill published in the GitHub repository cnfeat/top-pm-skills (48 stars, last pushed 3mo ago), licensed MIT. It adds 47 tokens to every session and 1,027 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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