What is ac-isolation?

A quick reference for setting up a workspace, a Python virtual environment, and Rust using rustup.

Creating a Python virtual environment, installing Python packages, installing Rust, activating it in a shell, and checking installed versions.

It puts common environment setup commands in one place, reducing the need to remember how to create, activate, and verify these tools.

ac-isolation — Skill for Claude Code and Codex by gni/agents-container

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 gni/agents-container --skill ac-isolation

Clone the repo

git clone --depth 1 https://github.com/gni/agents-container

Made for: Claude Code, Codex.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/gni/agents-container/ac-isolation/github.svg)](https://agentmods.dev/skills/gni/agents-container/ac-isolation)

Your own site

<a href="https://agentmods.dev/skills/gni/agents-container/ac-isolation"><img src="https://agentmods.dev/badge/skills/gni/agents-container/ac-isolation/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/gni/agents-container/ac-isolation"><img src="https://agentmods.dev/badge/skills/gni/agents-container/ac-isolation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 167 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.

Model	Per session	Once invoked
Fable 5.1	$0.00026	$0.00167
Opus 5.5	$0.00010	$0.00067
Sonnet 5.5	$0.00005	$0.00033
Haiku 4.5	$0.00003	$0.00017

Measured 2mo ago against content hash ae4b332d0e23, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

ac-isolation 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 2mo 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.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

Makes network callslowCapability

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

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

shared/skills/ac-isolation/SKILL.md · 40 lines

What it actually says

Agent Isolation & Setup

Workspace

Root directory: /workspace

Python Virtual Environment

# Create
python3 -m venv /workspace/venv

# Activate
source /workspace/venv/bin/activate

# Install a package
pip install <package>

# Deactivate
deactivate

Rust Installation

# Install via rustup
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

# Activate in current shell
source "$HOME/.cargo/env"

# Verify
rustc --version && cargo --version

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.

2mo ago First seen · 40 lines · 26 tokens per session scan C ae4b332d0e23

Subscribe to this mod's changes

ac-isolation is a skill published in the GitHub repository gni/agents-container (19 stars, last pushed 20d ago), licensed Apache-2.0. It adds 26 tokens to every session and 167 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Claude Code antigravity-cli codex gemini-cli opencode pi-coding-agent

ac-isolation next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
ac-isolationgni/agents-container	Skill	19	20d ago	Apache-2.0	C	26	Claude Code, Codex
showagent-session-handoffaytzey/showagent	Skill	63	yesterday	MIT	A	50	Claude Code, Codex
wtfp-create-outlineakougkas/wtf-p	Skill	20	4d ago	MIT	A	19	Claude Code
wtfp-resume-writingakougkas/wtf-p	Skill	20	4d ago	MIT	A	22	Claude Code
wtfp-create-posterakougkas/wtf-p	Skill	20	4d ago	MIT	A	22	Claude Code
wtfp-create-slidesakougkas/wtf-p	Skill	20	4d ago	MIT	A	23	Claude Code
wtfp-execute-outlineakougkas/wtf-p	Skill	20	4d ago	MIT	A	18	Claude Code

ac-isolation