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 simbajigege/book2skills --skill perennial-seller-holidaygit clone --depth 1 https://github.com/simbajigege/book2skillsWrote 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/simbajigege/book2skills/perennial-seller-holiday)<a href="https://agentmods.dev/skills/simbajigege/book2skills/perennial-seller-holiday"><img src="https://agentmods.dev/badge/skills/simbajigege/book2skills/perennial-seller-holiday/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/simbajigege/book2skills/perennial-seller-holiday"><img src="https://agentmods.dev/badge/skills/simbajigege/book2skills/perennial-seller-holiday.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 | $0.00036 | $0.02781 |
| Opus 5 | $0.00018 | $0.01391 |
| Sonnet 5 | $0.00007 | $0.00556 |
| Haiku 4.5 | $0.00004 | $0.00278 |
Grade A, and why
perennial-seller-holiday 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 12d 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 — 195 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Overview
This skill encodes Ryan Holiday's framework from Perennial Seller for creating work that earns continued success over years and decades rather than fading after initial release. The book draws on Holiday's experience working with authors, businesses, and creative projects — and his own books that continue to sell steadily years after publication.
Core thesis: Most creators optimize for short-term success (what's trending, what gets clicks today). Perennial sellers optimize for longevity. The strategies are almost exactly opposite.
The fundamental rule: "Promotion is not how things are made great — only how they're heard about." The work itself is the foundation; everything else builds on it.
When to Use This Skill
Use this skill for queries that match the trigger phrases in the description and require applying the decision framework from Perennial Seller: The Art of Making and Marketing Work That Lasts rather than summarizing the book.
Four-Part Framework
Part I: The Creative Process
Make something worth making.
The creative process is where perennial success is made or lost. No amount of marketing can save bad work; great work markets itself through the quality of the experience it creates.
The 20/80 problem: The advice "spend 20% of your time creating, 80% marketing" is terrible advice for perennial sellers. The reverse — obsessing over the work — is closer to the truth.
Key principles:
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Start with the right intent: You must have a genuine reason to make the work — not "I want to be famous" but "there's a truth that needs to be told" or "I can solve this problem better than it's been solved." Intent shapes every decision.
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Ask "What will this do in 10 years?" Filter every decision through the question of longevity. The choices that build longevity are usually the opposite of what maximizes short-term attention.
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Pick a lane: "Many creators want to be for everyone... and as a result end up being for no one." Hamilton's Lin-Manuel Miranda: "I picked a lane and started running ahead of everybody else." Define what your work is AND what it is not.
What ships with it
4 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.
- 12d ago First seen · 195 lines · 36 tokens per session scan A d888670113dc
perennial-seller-holiday is a skill published in the GitHub repository simbajigege/book2skills (163 stars, last pushed 17d ago), licensed MIT. It adds 36 tokens to every session and 2,781 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 2026-08-30.
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