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 agentmods add skills/dmythro/agent-skills/bun-clinpx skills add dmythro/agent-skills --skill bun-cligit clone --depth 1 https://github.com/dmythro/agent-skillsWrote 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/dmythro/agent-skills/bun-cli)<a href="https://agentmods.dev/skills/dmythro/agent-skills/bun-cli"><img src="https://agentmods.dev/badge/skills/dmythro/agent-skills/bun-cli.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 | $0.00159 | $0.08801 |
| Opus 5 | $0.00079 | $0.04401 |
| Sonnet 5 | $0.00032 | $0.01760 |
| Haiku 4.5 | $0.00016 | $0.00880 |
Grade A, and why
bun-cli scanned grade A with 1 finding 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 5d 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.
Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
`child_process`, `fs`, `net`, or `vm` -- then the diff, with minified files expanded and How it starts
The opening of the file, as written. The whole thing — 679 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Bun CLI
Bun is an all-in-one JavaScript/TypeScript runtime, package manager, bundler, and test runner. Bun runs TypeScript natively — bun file.ts directly, no compile step, no tsc, no ts-node. Always use bun instead of node, npm, npx, yarn, or pnpm in Bun projects.
Verified against Bun v1.4.0 (2026-08-20). Features are tagged with the version that
introduced them (v1.4+). Where 1.4 changed existing behavior, both behaviors are stated so
this skill stays correct on 1.3.x projects -- run bun --version before relying on a
version-tagged item.
Check the Version, Then Check Bun's Docs
bun <command> --help is authoritative for flags and always matches the installed binary --
prefer it over any table here when the two disagree.
For everything beyond flags, Bun ships its full docs inside bun-types, version-matched to
the runtime, in any project that has bun-types or @types/bun installed:
node_modules/bun-types/docs/pm/**/*.mdx # install, lockfile, workspaces, catalogs, linkers
node_modules/bun-types/docs/test/**/*.mdx # test runner
node_modules/bun-types/docs/bundler/**/*.mdx # bun build, executables, loaders, plugins
node_modules/bun-types/docs/runtime/bunfig.mdx
node_modules/bun-types/CLAUDE.md # Bun's own agent rules
- Verify the docs match the runtime. Compare
bun --versiontonode_modules/bun-types/package.json.bun initinstalls@types/bun@latest, which lags behind releases -- correct it withbun add -d bun-types@<runtime-version>. - Open by explicit path. With the global virtual store enabled,
node_modules/bun-typesis a symlink, sofind node_modules -name '*.mdx'andrg <pattern> node_modulesreturn nothing.find node_modules/bun-types/docs -name '*.mdx'works. - Never edit under
node_modules/. Under the global store every project on the machine shares the same inode. Usebun patch. - Not installed? The same path works online:
docs/pm/lockfile.mdxishttps://bun.com/docs/pm/lockfile.
What ships with it
7 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.
- 5d ago First seen · 679 lines · 159 tokens per session scan A fc4aa6021292
bun-cli is a skill published in the GitHub repository dmythro/agent-skills (5 stars, last pushed 4d ago), licensed MIT. It adds 159 tokens to every session and 8,801 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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