ConnectOnion is an open-source, template-first toolkit for building, debugging, deploying, and operating AI agents. Developers use its command-line tools and Python runtime to create agents, add tools, connect services, deploy them, and make them callable by other agents, while the catalogue entries are related agents, skills, and instructions.
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 openonion/connectonion --skill install-connectoniongit clone --depth 1 https://github.com/openonion/connectonionWrote 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/openonion/connectonion/install-connectonion)<a href="https://agentmods.dev/skills/openonion/connectonion/install-connectonion"><img src="https://agentmods.dev/badge/skills/openonion/connectonion/install-connectonion/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/openonion/connectonion/install-connectonion"><img src="https://agentmods.dev/badge/skills/openonion/connectonion/install-connectonion.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 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 Privilege Escalation · line 48 Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
- medium Rogue Agent · line 81 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
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 | $0.00069 | $0.03669 |
| Opus 5 | $0.00034 | $0.01835 |
| Sonnet 5 | $0.00014 | $0.00734 |
| Haiku 4.5 | $0.00007 | $0.00367 |
Grade B, and why
install-connectonion 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 5d 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.
> - **Linux:** `sudo apt install python3 python3-venv python3-pip` (or the distro equivalent). How it starts
The opening of the file, as written. The whole thing — 273 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Install ConnectOnion Skill
Take a machine from nothing to a setup where every co command works — co status,
co email, co browser, the co/* models, all of it — on whatever OS the person uses.
Then tell them, in plain words, exactly what they have.
Assume the person running this may not be technical. They may not know what a "virtual environment", "PATH", or "API key" is — that's fine. Do the technical work for them and keep them informed in friendly, jargon-free language. Never dump a raw stack trace; turn every problem into "here's what happened and here's what I'm doing about it."
How to run this skill
- Work on the user's real OS. Windows, macOS, and Linux differ in command names and
shells — do Step 0 first and use the right ones. Don't assume
python3,grep, or thebashtool exist everywhere. - Verify every step before moving on — each has a check; run it.
- Auto-correct instead of giving up. On failure, don't paste the error — diagnose, apply the Recovery fix, retry (up to 2 attempts) before escalating.
- Only ask the human for things only a human can do — installing Python, adding credit, an OAuth browser login. One plain sentence.
- Never print or store secrets — confirm a key is present, never show its value.
Step 0: Know the machine
Resolve the platform and the Python command. Everything below writes PY for "the
Python that works here" — resolve it once, reuse it.
- Detect the OS (e.g.
unameprintsDarwin/Linux; failing/absent → Windows). - Find Python (needs 3.10+). Try in order, keep the first that prints 3.10+ — that's
PY:python3 --version # macOS / Linux usually python --version # Windows usually py -3 --version # Windows Python launcher - Pick the shell. macOS/Linux: the
bashtool is fine. Windows: thebashtool does not work (Unix-only) — use theshelltool and avoidgrep/cat/ls. Preferco …andPY -c "…", which behave the same everywhere.
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.
- 5d ago Changed · +7 lines · -45 tokens per session 2180accde3df
- 9d ago First seen · 266 lines · 114 tokens per session scan B f28df0e295d5
install-connectonion is a skill published in the GitHub repository openonion/connectonion (1,480 stars, last pushed today), licensed Apache-2.0. It adds 69 tokens to every session and 3,669 once invoked, about $0.0003 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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