Borrowing it
Nothing to install: this file belongs to schuettc/muster. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/schuettc/muster/main/.claude/skills/muster-hosted-backend/SKILL.mdgit clone --depth 1 https://github.com/schuettc/musterWrote 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/schuettc/muster/muster-hosted-backend)<a href="https://agentmods.dev/skills/schuettc/muster/muster-hosted-backend"><img src="https://agentmods.dev/badge/skills/schuettc/muster/muster-hosted-backend.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 | $0.00105 | $0.02133 |
| Opus 5 | $0.00053 | $0.01066 |
| Sonnet 5 | $0.00021 | $0.00427 |
| Haiku 4.5 | $0.00011 | $0.00213 |
Grade C, and why
muster-hosted-backend scanned grade C with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Downloads and executes remote codehighSupply chain
curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.
curl -fsSL https://muster.tools/install.sh | sh -s -- --with-deploy Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s -o /dev/null -w '%{http_code}\n' -X POST "$MUSTER_REMOTE_URL" \ The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
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.
- 6d ago First seen · 188 lines · 105 tokens per session scan C d12c0bb36788
muster-hosted-backend is a skill published in the GitHub repository schuettc/muster (12 stars, last pushed yesterday), with no licence file. It adds 105 tokens to every session and 2,133 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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