run-dev

A development guide for CubeSandbox components.

In plain words
What is it for?
Use it when compiling CubeSandbox, running its tests, formatting code, or carrying out development work in the project.
Why use it?
It provides the project-specific way to build, test, format, and develop the components.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/tencentcloud/cubesandbox/run-dev
Any agent
npx skills add TencentCloud/CubeSandbox --skill run-dev
Clone the repo
git clone --depth 1 https://github.com/TencentCloud/CubeSandbox

Made for: Claude Code, Codex.

Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,878 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. Scan, not verified.
Origin unknown 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 $0.00037 $0.01878
Opus 5 $0.00018 $0.00939
Sonnet 5 $0.00007 $0.00376
Haiku 4.5 $0.00004 $0.00188

Measured yesterday against content hash 015535439047, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

run-dev scanned grade B 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 yesterday.

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.

| `docker: Cannot connect` | Docker daemon not running. `sudo systemctl start docker` |
.claude/skills/run-dev/SKILL.md · 194 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. yesterday First seen · 194 lines · 37 tokens per session scan B 015535439047

Subscribe to this mod's changes

run-dev is a skill published in the GitHub repository TencentCloud/CubeSandbox (11,391 stars, last pushed 4d ago), with no licence file. It adds 37 tokens to every session and 1,878 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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