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/tak-uukti/linux-computer-use/computer-usenpx skills add tak-uukti/linux-computer-use --skill computer-usegit clone --depth 1 https://github.com/tak-uukti/linux-computer-useWhat 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 | $0.00039 | $0.00481 |
| Opus 5 | $0.00019 | $0.00241 |
| Sonnet 5 | $0.00008 | $0.00096 |
| Haiku 4.5 | $0.00004 | $0.00048 |
Grade A, and why
computer-use 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 2d 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.
What it actually says
computer-use (Linux/X11)
Quick Start
list_windows # → @wN list (title, pid, geometry)
screenshot {window:"@w2"} # focus + capture; returns @eN AX targets + PNG
click {ref:"@e3"} # click an element by ref
type_text {text:"hello"} # type at cursor
keypress {keys:["Return"]} # submit
Tools
| name | use |
|---|---|
| list_windows | enumerate visible windows |
| screenshot | focus window, capture PNG, return AX targets @eN |
| click | click @eN/@wN or x,y; supports button, clickCount |
| type_text | type literal text at cursor |
| set_text | replace @eN text/entry value (AT-SPI; falls back to ctrl+a + type) |
| keypress | press keys/chords (Return, ["Ctrl","A"], ["ctrl+l","Return"]) |
| scroll | scroll at ref/coords by scrollY/scrollX pixels |
| computer_actions | run a sequence (≤20) in one call |
Pitfalls
- X11 only. Wayland sessions cannot capture other-app windows or synthesize input.
- Enable AT-SPI:
gsettings set org.gnome.desktop.interface toolkit-accessibility true. - Keystrokes go to whatever currently has focus — call
screenshot {window}first to focus the target. - Mouse cursor physically moves on every click (no stealth pointer).
@eNrefs are scoped to the bridge process and invalidated by the nextscreenshot. Re-screenshot after layout changes.- AX walk capped at depth 12 / 200 elements per app.
- Chrome / Electron expose AT-SPI only when launched with
--force-renderer-accessibility. - LibreOffice needs
SAL_USE_COMMON_ONE_ACCESSIBILITY=1and a real Xorg session (not Xvfb).
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.
- 2d ago First seen · 41 lines · 39 tokens per session scan A 661dabca2007
computer-use is a skill published in the GitHub repository tak-uukti/linux-computer-use (3 stars, last pushed 4mo ago), licensed MIT. It adds 39 tokens to every session and 481 once invoked, about $0.0002 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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