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 magnus919/agent-skills --skill yc-weekly-growth-compassgit clone --depth 1 https://github.com/magnus919/agent-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/magnus919/agent-skills/yc-weekly-growth-compass)<a href="https://agentmods.dev/skills/magnus919/agent-skills/yc-weekly-growth-compass"><img src="https://agentmods.dev/badge/skills/magnus919/agent-skills/yc-weekly-growth-compass/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/magnus919/agent-skills/yc-weekly-growth-compass"><img src="https://agentmods.dev/badge/skills/magnus919/agent-skills/yc-weekly-growth-compass.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00051 | $0.02251 |
| Opus 5 | $0.00026 | $0.01125 |
| Sonnet 5 | $0.00010 | $0.00450 |
| Haiku 4.5 | $0.00005 | $0.00225 |
Grade A, and why
yc-weekly-growth-compass 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 7d 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 — 221 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Weekly Growth Compass
"If there's one number every founder should always know, it's the company's growth rate. That's the measure of a startup. If you don't know that number, you don't even know if you're doing well or badly." — Paul Graham, "Startup = Growth" (September 2012)
This skill operationalizes Y Combinator's core growth philosophy into a repeatable weekly practice. The growth rate is not just a metric — it's a compass for every decision a founder makes.
When to Load
| Trigger | Example |
|---|---|
| "What's my growth rate?" | Routine founder check-in |
| "Are we growing fast enough?" | Trajectory anxiety |
| "Should we prioritize feature X or growth Y?" | Decision framing |
| "Where will we be in a year?" | Projection/planning |
| "How does our growth compare to YC benchmarks?" | Benchmarking |
| "Is this initiative worth doing?" | Growth compass check |
| "How long to double our revenue?" | Milestone planning |
How to Use
Quick Rule of Thumb (No Script)
YC's empirical benchmarks, based on measuring thousands of startups:
| Weekly Growth | Annualized | YC Assessment |
|---|---|---|
| 1% | 1.7x | Concerning — haven't found product-market fit |
| 2% | 2.8x | Below average — need significant acceleration |
| 5% | 12.6x | Good — solid trajectory, keep pushing |
| 7% | 33.7x | Very good — exceptional progress |
| 10% | 142.0x | Outstanding — rare breakout trajectory |
The inflection point: 5-7% weekly is the target zone YC coaches for.
Growth Compass Exercise (No Script)
Use this heuristic for any strategic decision:
- State your target weekly growth rate (e.g., "7%")
- For any proposed initiative, ask: "Does this serve our target growth rate?"
- If yes → do it. If no → defer or drop it.
- At end of week, measure actual growth. If you missed target, something else matters more than the thing you did.
This transforms the bewildering complexity of startup building into a single optimization problem, exactly as Graham intended.
What ships with it
5 files 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.
- 7d ago First seen · 221 lines · 51 tokens per session scan A 786fa4ae8357
yc-weekly-growth-compass is a skill published in the GitHub repository magnus919/agent-skills (76 stars, last pushed yesterday), licensed MIT. It adds 51 tokens to every session and 2,251 once invoked, about $0.0003 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 2026-09-05.
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