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 agentmods add skills/arcassystems/founderos/add-handsnpx skills add ARCASSystems/FounderOS --skill add-handsgit clone --depth 1 https://github.com/ARCASSystems/FounderOSWrote 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/arcassystems/founderos/add-hands)<a href="https://agentmods.dev/skills/arcassystems/founderos/add-hands"><img src="https://agentmods.dev/badge/skills/arcassystems/founderos/add-hands.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00177 | $0.01790 |
| Opus 5 | $0.00088 | $0.00895 |
| Sonnet 5 | $0.00035 | $0.00358 |
| Haiku 4.5 | $0.00018 | $0.00179 |
Grade A, and why
add-hands scanned grade A with 0 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 4d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Add hands
Runs on: local-exec - the happy path runs a local Python setup and a local action dispatcher. On a read-only or cloud surface, explain the actions and the gate but do NOT take any action or claim one ran - it has not until the user runs it locally.
The OS ships complete as a brain that reads and answers. This adds hands: the ability to act on what it decides. It is the swappable hands from the brain / mouth / hands scaffold. The brain stays the same; the hands are how it reaches out and does something. Nothing here is required, and nothing irreversible happens without you saying yes.
The rule that governs everything here: the confirm gate
Every action is one of three classes, and the class decides what happens:
- Auto (safe, reversible, local): runs with no confirmation. Open a file, a folder, an app, or a link. Save a note to your log (an append you can delete). These cannot lose work or reach outside your machine, so stopping for a yes would only annoy you.
- Confirm (irreversible or outward-facing): stops for an explicit yes every time, and shows you exactly what it will do first. Running a command is the shipped example. It is OFF by default - you turn it on deliberately in
voice/hands-config.json. - Blocked / not built: sending, posting, and computer control. They are named honestly as not yet built. When they are added, they arrive in the Confirm class, behind this same gate. The OS says plainly it cannot do them yet rather than pretending or stalling.
This mirrors the OS's existing approval-gates rule for irreversible actions. Hands do not invent a new safety model; they apply the one the OS already has to real actions.
The accessibility floor
The default hands need NO key, NO paid service, and NO pip install. Opening things and saving notes use tools your machine already has. Everything past that is opt-in.
Pre-flight
- Confirm a local runtime: this skill runs Python and your machine's file/app openers. On a web-only surface, walk the actions and the gate and stop - do not take any action or claim one ran.
- A note action appends to
brain/log.md. If that file does not exist yet, the dispatcher creates it; say so plainly rather than failing.
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 4d ago First seen · 98 lines · 177 tokens per session scan A e97a686b1aeb
add-hands is a skill published in the GitHub repository ARCASSystems/FounderOS (5 stars, last pushed 21d ago), licensed MIT. It adds 177 tokens to every session and 1,790 once invoked, about $0.0009 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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