sandbox-status

sandbox-status is a skill for Claude Code from FlorianBruniaux/claude-code-plugins. It costs 13 tokens per session (1,435 once invoked), scanned C, original, MIT.

A command that reports the operating system sandbox’s status, settings, and recent blocked actions.

In plain words
What is it for?
Use it to check sandbox support, inspect active permissions and network rules, and review recent violations.
Why use it?
It makes the agent’s file, network, and command restrictions visible when you need to understand its execution environment.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter. Also seen: reads .claude/ paths; mentions Claude Code.

Part of the devops-pipeline plugin — 11 skills, 8 commands shipped together

Good fit Use it to check sandbox support, inspect active permissions and network rules, and review recent violations.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/florianbruniaux/claude-code-plugins/sandbox-status
Install

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.

Any agent
npx skills add FlorianBruniaux/claude-code-plugins --skill sandbox-status
Clone the repo
git clone --depth 1 https://github.com/FlorianBruniaux/claude-code-plugins

Made for: Claude Code.

Or install devops-pipeline, the plugin that ships this one along with the rest of its 11 skills, 8 commands.

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 sandbox-status

README.md
[![agentmods](https://agentmods.dev/badge/skills/florianbruniaux/claude-code-plugins/sandbox-status/github.svg)](https://agentmods.dev/skills/florianbruniaux/claude-code-plugins/sandbox-status)
Your own site
<a href="https://agentmods.dev/skills/florianbruniaux/claude-code-plugins/sandbox-status"><img src="https://agentmods.dev/badge/skills/florianbruniaux/claude-code-plugins/sandbox-status/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 sandbox-status

Your own site · 80×15
<a href="https://agentmods.dev/skills/florianbruniaux/claude-code-plugins/sandbox-status"><img src="https://agentmods.dev/badge/skills/florianbruniaux/claude-code-plugins/sandbox-status.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 13 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,435 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 2 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00013 $0.01435
Opus 5.5 $0.00005 $0.00574
Sonnet 5.5 $0.00003 $0.00287
Haiku 4.5 $0.00001 $0.00144

Measured 1mo ago against content hash d5b0f4051003, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

sandbox-status 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 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

echo " Install: sudo apt-get install bubblewrap socat"

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

elif [ -f ~/.claude/settings.json ]; then
plugins/devops-pipeline/skills/sandbox-status/SKILL.md · 181 lines

How it starts

The opening of the file, as written. The whole thing — 181 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Sandbox Status Command

Inspect the native Claude Code sandbox state, active configuration, and security events.

Usage

/sandbox-status

What It Does

  1. Check sandbox availability

    • Verify OS primitives installed (bubblewrap on Linux, Seatbelt on macOS)
    • Display platform support status
  2. Show active configuration

    • Sandbox mode (Auto-allow vs Regular permissions)
    • Filesystem policies (allowed writes, denied reads)
    • Network policies (domain allowlist/denylist)
    • Excluded commands
  3. List recent sandbox violations

    • Blocked filesystem access attempts
    • Blocked network connections
    • Escape hatch invocations (dangerouslyDisableSandbox)

Implementation

#!/bin/bash

echo "=== Native Sandbox Status ==="
echo

# 1. Platform Check
echo "Platform:"
case "$OSTYPE" in
  darwin*)
    echo "  ✅ macOS (Seatbelt built-in)"
    ;;
  linux*)
    if which bubblewrap >/dev/null 2>&1; then
      echo "  ✅ Linux (bubblewrap installed)"
      bubblewrap --version 2>/dev/null | head -1
    else
      echo "  ❌ Linux (bubblewrap NOT installed)"
      echo "     Install: sudo apt-get install bubblewrap socat"
    fi
    if which socat >/dev/null 2>&1; then
      echo "  ✅ socat installed"
    else
      echo "  ❌ socat NOT installed"
    fi
    ;;
  *)
    echo "  ❌ Unsupported platform: $OSTYPE"
    ;;
esac
echo

# 2. Configuration
echo "Configuration (from settings.json):"
if [ -f .claude/settings.json ]; then
  CONFIG=".claude/settings.json"
elif [ -f ~/.claude/settings.json ]; then
  CONFIG="~/.claude/settings.json"
else
  echo "  ⚠️  No settings.json found"
  CONFIG=""
fi

if [ -n "$CONFIG" ]; then
  echo "  Source: $CONFIG"

  # Auto-allow mode
  AUTO_ALLOW=$(jq -r '.sandbox.autoAllowMode // "not set"' "$CONFIG" 2>/dev/null)
  echo "  Auto-allow: $AUTO_ALLOW"

  # Allowed write paths
  WRITE_PATHS=$(jq -r '.sandbox.filesystem.allowedWritePaths[]? // empty' "$CONFIG" 2>/dev/null | tr '\n' ', ')
  echo "  Allowed writes: ${WRITE_PATHS:-not set}"

  # Denied read paths
  DENIED_READS=$(jq -r '.sandbox.filesystem.deniedReadPaths[]? // empty' "$CONFIG" 2>/dev/null | tr '\n' ', ')
  echo "  Denied reads: ${DENIED_READS:-not set}"

  # Network policy
  NET_POLICY=$(jq -r '.sandbox.network.policy // "not set"' "$CONFIG" 2>/dev/null)
  echo "  Network policy: $NET_POLICY"

  # Allowed domains
  DOMAINS=$(jq -r '.sandbox.network.allowedDomains[]? // empty' "$CONFIG" 2>/dev/null | head -3 | tr '\n' ', ')
  DOMAINS_COUNT=$(jq -r '.sandbox.network.allowedDomains | length' "$CONFIG" 2>/dev/null)
  if [ -n "$DOMAINS" ]; then
    echo "  Allowed domains: $DOMAINS... ($DOMAINS_COUNT total)"
  else
    echo "  Allowed domains: not set"
  fi

  # Excluded commands
  EXCLUDED=$(jq -r '.sandbox.excludedCommands[]? // empty' "$CONFIG" 2>/dev/null | tr '\n' ', ')
  echo "  Excluded commands: ${EXCLUDED:-not set}"
fi
echo

# 3. Recent Violations (placeholder - actual implementation would read Claude Code logs)
echo "Recent sandbox violations:"
echo "  ℹ️  Log inspection not yet implemented"
echo "  Tip: Check Claude Code session logs for sandbox violation notifications"
echo

# 4. Open-Source Runtime
echo "Open-Source Runtime:"
if which npx >/dev/null 2>&1; then
  echo "  ✅ npx available - can use @anthropic-ai/sandbox-runtime"
  echo "  Usage: npx @anthropic-ai/sandbox-runtime <command>"
else
  echo "  ⚠️  npx not found (install Node.js)"
fi
echo

# 5. Documentation
echo "Documentation:"
echo "  Guide: guide/sandbox-native.md"
echo "  Official: https://code.claude.com/docs/en/sandboxing"
echo "  Runtime: https://github.com/anthropic-experimental/sandbox-runtime"

Read the full file on GitHub · 181 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. 1mo ago First seen · 181 lines · 13 tokens per session scan C d5b0f4051003

Subscribe to this mod's changes

sandbox-status is a skill published in the GitHub repository FlorianBruniaux/claude-code-plugins (42 stars, last pushed 1mo ago), licensed MIT. It adds 13 tokens to every session and 1,435 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it C with 2 findings (asks for root, reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-04.

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