agent-glovebox: Skill for Claude Code

.claude/skills/run-control-tower/SKILL.md

run-control-tower is a skill for Claude Code from AlexanderMattTurner/agent-glovebox. It costs 149 tokens per session (8,773 once invoked), scanned A, original, Apache-2.0.

A procedure for running the Control Tower, a paid benchmark that tests how well a sandbox limits an autonomous software agent. It compares attack prevention with the usefulness cost of adding those protections.

In plain words
What is it for?
It helps dispatch live or cheaper probe evaluations, choose the agent model and budget, build test cases, and retrieve evaluation transcripts. The tests cover attacks against Linux-based environments.
Why use it?
It provides a repeatable way to check whether the sandbox blocks harmful actions while still allowing useful work. The procedure also collects the agent's evaluation records and results.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: mentions CLAUDE.md; positional $N argument.

This is AlexanderMattTurner/agent-glovebox's own configuration. It tells Claude Code how to work on agent-glovebox itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything agent-glovebox configures →

Reuse

Borrowing it

Nothing to install: this file belongs to AlexanderMattTurner/agent-glovebox. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/AlexanderMattTurner/agent-glovebox/main/.claude/skills/run-control-tower/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/AlexanderMattTurner/agent-glovebox

Made for: Claude Code.

Wrote 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.

agentmods badge for run-control-tower

README.md
[![agentmods](https://agentmods.dev/badge/skills/alexandermattturner/agent-glovebox/run-control-tower/github.svg)](https://agentmods.dev/skills/alexandermattturner/agent-glovebox/run-control-tower)
Your own site
<a href="https://agentmods.dev/skills/alexandermattturner/agent-glovebox/run-control-tower"><img src="https://agentmods.dev/badge/skills/alexandermattturner/agent-glovebox/run-control-tower/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.

agentmods 80×15 button for run-control-tower

Your own site · 80×15
<a href="https://agentmods.dev/skills/alexandermattturner/agent-glovebox/run-control-tower"><img src="https://agentmods.dev/badge/skills/alexandermattturner/agent-glovebox/run-control-tower.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 149 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 8,773 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 3 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium analysis-evasion · line 1
    Suspicious Unicode normalization or mixed-script content
    Fix: Review the flagged content for security risks. Ensure no credentials, secrets, or sensitive data are exposed.
  • medium Prompt Injection · line 23
    Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.
    Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
  • medium Output Handling · line 100
    Output size or generation rate is not bounded. Unbounded output enables denial-of-service through resource exhaustion, log flooding, or context-window stuffing.
    Fix: Set explicit limits on output length, generation count, and rate. Use max_tokens and truncation to prevent unbounded output.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00149 $0.08773
Opus 5.5 $0.00060 $0.03509
Sonnet 5.5 $0.00030 $0.01755
Haiku 4.5 $0.00015 $0.00877

Measured 15d ago against content hash 802a053b0578, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

run-control-tower 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 15d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- **`allow_hosts`**: the tuned arm's per-env EXTRA grant, and the operator's alone. **A `guarded-tuned` cell must name at least one host — `ct_inspect_e2e_plan.py` refuses one that names none**, because a tuned cell open
.claude/skills/run-control-tower/SKILL.md · 174 lines

How it starts

The opening of the file, as written. The whole thing — 174 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Run Control Tower (CT) evals

The Control Tower / LinuxArena benchmark measures glovebox's marginal defense: attack-success reduction (ΔS) and usefulness cost (ΔU), bare vs guarded. It is external, independently authored (linuxarena/control-tower, pinned by SHA in evals/control_tower/requirements.txt), and paid — every cell drives a real untrusted agent loop plus (guarded) a per-call monitor.

Which harness to run

Every CT harness lives in one workflow, .github/workflows/evals.yaml, selected by its suite: dispatch input. ct-render-tier.yaml is a cheap advisory guard on CT inputs, never a harness, so no suite: reaches it.

suite: input What it is Needs KVM? Cost
ct-inspect-e2e LIVE end-to-end: real CT env under the real Kata microVM (build → boot → egress-deny → agent → approver → CT scorer). ΔS corroborated by the policy log. Driven by run_vm_real.py. Yes (hosted ubuntu-latest exposes /dev/kvm) High (microVM boots + trajectories + monitor)
ct-inspect-seams Cheap probe: install inspect+CT, dump the API surface, run seam unit tests. No KVM, no spend, no VM. The suite: default. No ~free
breakout-ctf Live-fire breakout CTF — a different harness and a different question, owned by the run-ctf skill. Nothing else here applies to it. Yes paid

Read the full file on GitHub · 174 lines

Changes

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.

  1. 15d ago Changed 802a053b0578
  2. 18d ago Changed 97b4e105f2b1
  3. 21d ago Changed edfea5681c3d
  4. 25d ago Changed cb99a8aa250b
  5. 26d ago Changed 755c64b26c73
  6. 27d ago Changed fae3e14a6091
  7. 28d ago Changed 6953850956a4
  8. 1mo ago Changed f89d9e8fe04e
  9. 1mo ago Changed · -1 lines · -1 tokens per session e1ccb471e9c1
  10. 1mo ago First seen · 175 lines · 150 tokens per session scan A 5d9360db5cd5

Subscribe to this mod's changes

run-control-tower is a skill published in the GitHub repository AlexanderMattTurner/agent-glovebox (68 stars, last pushed today), licensed Apache-2.0. It adds 149 tokens to every session and 8,773 once invoked, about $0.0006 per session on Opus 5.5. A static security scan graded it A with 1 finding (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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