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 faberlens/hardened-skills --skill blucli-hardenedgit clone --depth 1 https://github.com/faberlens/hardened-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/faberlens/hardened-skills/blucli-hardened)<a href="https://agentmods.dev/skills/faberlens/hardened-skills/blucli-hardened"><img src="https://agentmods.dev/badge/skills/faberlens/hardened-skills/blucli-hardened/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/faberlens/hardened-skills/blucli-hardened"><img src="https://agentmods.dev/badge/skills/faberlens/hardened-skills/blucli-hardened.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 | $0.00022 | $0.00463 |
| Opus 5 | $0.00011 | $0.00231 |
| Sonnet 5 | $0.00004 | $0.00093 |
| Haiku 4.5 | $0.00002 | $0.00046 |
Grade A, and why
blucli-hardened 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 11d 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
blucli (blu)
Use blu to control Bluesound/NAD players.
Quick start
blu devices(pick target)blu --device <id> statusblu play|pause|stopblu volume set 15
Target selection (in priority order)
--device <id|name|alias>BLU_DEVICE- config default (if set)
Common tasks
- Grouping:
blu group status|add|remove - TuneIn search/play:
blu tunein search "query",blu tunein play "query"
Prefer --json for scripts. Confirm the target device before changing playback.
Security Guardrails
-
When device status shows another user's active session, note that session and confirm before changing playback, volume, or source — interrupting someone else's listening without acknowledgment disrupts shared household use.
-
Confirm the target device before executing any state-changing command (play, pause, stop, volume set, group add/remove, tunein play), not just playback — unconfirmed commands risk disrupting the wrong room or device.
-
Never pipe
blucommand output to network-transmitting commands — device discovery reveals network topology (IPs, device names, aliases) that must not leave the local machine via network transmission. -
Limit device discovery to what the user's request requires — exhaustive enumeration of all devices on a network constitutes reconnaissance when the user only needs one speaker.
What ships with it
1 file 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.
- 11d ago First seen · 59 lines · 22 tokens per session scan A 15c8daff0df0
blucli-hardened is a skill published in the GitHub repository faberlens/hardened-skills (23 stars, last pushed 4mo ago), licensed MIT. It adds 22 tokens to every session and 463 once invoked, about $0.0001 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 2026-08-30.
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