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 Zfinix/aster --skill package-managersgit clone --depth 1 https://github.com/Zfinix/asterWrote 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/zfinix/aster/package-managers)<a href="https://agentmods.dev/skills/zfinix/aster/package-managers"><img src="https://agentmods.dev/badge/skills/zfinix/aster/package-managers/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/zfinix/aster/package-managers"><img src="https://agentmods.dev/badge/skills/zfinix/aster/package-managers.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 | $0.00039 | $0.00347 |
| Opus 5.5 | $0.00016 | $0.00139 |
| Sonnet 5.5 | $0.00008 | $0.00069 |
| Haiku 4.5 | $0.00004 | $0.00035 |
Grade A, and why
package-managers 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 1mo 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.
What it actually says
Package managers
- The lockfile picks the manager.
bun.lock/bun.lockbmeans bun,pnpm-lock.yamlmeans pnpm,yarn.lockmeans yarn,package-lock.jsonmeans npm. Never mix: running npm in a bun repo creates a second lockfile and a second dependency tree. - Run from the directory that owns the lockfile, not the repo root of a monorepo.
- Scripts go through the owner.
bun run build,pnpm run test; one-offs withbunx toolorpnpm dlx tool, never barenpxin a non-npm repo. - A failed install is not a reason to switch managers. If
bun installfails,npm installin the same repo fails for the same underlying reason and leaves a mess behind. Diagnose the actual error instead. - Permission errors during installs are usually the sandbox. Writes are
allowed in the repository, temp directories, and package caches
(
~/.npm,~/.bun,~/.cargo). An error naming another path means the sandbox blocked it; report the path instead of retrying. - Offline or turbo mode blocks the network. Installs need the network; say that plainly instead of retrying the install.
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.
- 1mo ago First seen · 26 lines · 39 tokens per session scan A cd9f84e78d12
package-managers is a skill published in the GitHub repository Zfinix/aster (129 stars, last pushed 8d ago), licensed Apache-2.0. It adds 39 tokens to every session and 347 once invoked, about $0.0002 per session on Opus 5.5. 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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