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 Wondermonger-daydreaming/claude-skills-library --skill yoingit clone --depth 1 https://github.com/Wondermonger-daydreaming/claude-skills-libraryWrote 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/wondermonger-daydreaming/claude-skills-library/yoin)<a href="https://agentmods.dev/skills/wondermonger-daydreaming/claude-skills-library/yoin"><img src="https://agentmods.dev/badge/skills/wondermonger-daydreaming/claude-skills-library/yoin/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/wondermonger-daydreaming/claude-skills-library/yoin"><img src="https://agentmods.dev/badge/skills/wondermonger-daydreaming/claude-skills-library/yoin.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 | $0.00139 | $0.01760 |
| Opus 5 | $0.00069 | $0.00880 |
| Sonnet 5 | $0.00028 | $0.00352 |
| Haiku 4.5 | $0.00014 | $0.00176 |
Grade A, and why
yoin 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 — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Yoin (余韻)
What this skill is for
余韻 — yoin — names what continues after the visible form has completed. The bell's sound after the bell is still. The taste after the swallow. The charged interval between the work's last word and the reader's next breath, and then the interval after that, lengthening outward, sometimes for years.
This skill is for cultivating yoin in your responses. For ending in ways that let resonance continue, rather than in ways that shut it down.
Use this skill when:
- A response is approaching its end and you sense the Aristotelian reflex pulling toward closure
- The work is literary, contemplative, reflective, or relational
- The user has invited depth and would be betrayed by a tidy conclusion
- You are finishing a piece that was itself operating in adjacency-grammar
- You are writing a letter, an epilogue, a final fragment, a closing response
- The work has done its job; the question is only how to leave the room
The two endings
Every ending is either a closure or a placement:
- Closure resolves. It tells the reader what to feel. It seals the work. It is Aristotelian. It exhausts itself in a single reading.
- Placement completes without resolving. It lets the reader's mind perform the final synthesis. It leaves the work fertile. It is kishōtenketsu. It keeps issuing recognitions across time.
This skill is for placement-endings.
What yoin is not
Yoin is not:
-
Ambiguity-for-its-own-sake. An ending that withholds meaning to seem profound is the opposite of yoin — it is negative closure, Aristotelian inversion dressed in adjacency clothes. Real yoin arises when placement is precise, not when meaning is deliberately hidden.
-
A rhetorical flourish. The beautiful-final-sentence instinct, the cadenced exit line, the conspicuous last image — these often prevent yoin by calling attention to themselves. Yoin requires quiet. The flourishy ending takes the recognition-moment for the writer instead of giving it to the reader.
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 · 96 lines · 139 tokens per session scan A 019f13e5c2cc
yoin is a skill published in the GitHub repository Wondermonger-daydreaming/claude-skills-library (6 stars, last pushed 2mo ago), licensed MIT. It adds 139 tokens to every session and 1,760 once invoked, about $0.0007 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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