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 thettwe/nyann --skill setupgit clone --depth 1 https://github.com/thettwe/nyannWrote 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/thettwe/nyann/setup)<a href="https://agentmods.dev/skills/thettwe/nyann/setup"><img src="https://agentmods.dev/badge/skills/thettwe/nyann/setup.svg" alt="Measured on agentmods" 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 | $0.00182 | $0.02660 |
| Opus 5 | $0.00091 | $0.01330 |
| Sonnet 5 | $0.00036 | $0.00532 |
| Haiku 4.5 | $0.00018 | $0.00266 |
Grade A, and why
setup 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 3d 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 — 301 lines — stays where its author put it; the contents beside it link to each section on GitHub.
setup
CRITICAL: This skill uses the
AskUserQuestiontool for ALL user choices. NEVER ask questions as plain text. Every user choice goes throughAskUserQuestionwith the exact JSON shown below.
Script paths: nyann is a Claude Code plugin, NOT a CLI tool. Do NOT
search for it via which, npm list, pip list, or brew list. All
scripts are at the plugin root. Determine the plugin root from this
SKILL.md's path (<plugin_root>/skills/setup/SKILL.md) — the scripts
are at <plugin_root>/bin/. Use bash <plugin_root>/bin/<script> for
all commands below.
Re-runnable: if preferences already exist, show current values and offer to update them.
Step 1: Status + prereqs (parallel, one turn)
Run both commands in parallel (single tool-call turn):
bash <plugin_root>/bin/setup.sh --check --jsonbash <plugin_root>/bin/check-prereqs.sh --json
Do NOT show the raw JSON to the user. Parse the prereqs array
and build separate small tables by category. Use pipe-delimited
markdown (NO box-drawing characters, NO manual padding). Shorten
version strings (e.g., git version 2.50.1 (Apple Git-155) → 2.50.1).
Example output:
**Required**
| Tool | Status | Version |
|---|---|---|
| git | ok | 2.50.1 |
| jq | ok | 1.7.1 |
| bash | ok | 3.2.57 |
**JS / TS**
| Tool | Status | Version |
|---|---|---|
| node | ok | v25.9.0 |
| pnpm | ok | 10.13.1 |
**Python**
| Tool | Status | Version |
|---|---|---|
| python3 | ok | 3.14.4 |
| pre-commit | ok | 4.6.0 |
| uv | ok | 0.9.15 |
**Other**
| Tool | Status | Version |
|---|---|---|
| go | ok | 1.26.2 |
| cargo | missing | https://rustup.rs |
| gh | ok | 2.83.1 |
| gitleaks | ok | 8.30.1 |
| shellcheck | ok | 0.11.0 |
All hard prerequisites satisfied.
Group tools by: Required (kind=hard), JS / TS (node, npm,
pnpm, yarn, bun), Python (python3, pre-commit, uv),
Other (everything else). Skip empty groups. For missing tools,
show the hint field instead of a version.
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.
- 3d ago First seen · 301 lines · 182 tokens per session scan A 8fc9d09747e5
setup is a skill published in the GitHub repository thettwe/nyann (6 stars, last pushed 8d ago), licensed MIT. It adds 182 tokens to every session and 2,660 once invoked, about $0.0009 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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