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 Panchangam18/background-computer-use --skill numbersgit clone --depth 1 https://github.com/Panchangam18/background-computer-useWrote 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/panchangam18/background-computer-use/numbers)<a href="https://agentmods.dev/skills/panchangam18/background-computer-use/numbers"><img src="https://agentmods.dev/badge/skills/panchangam18/background-computer-use/numbers/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/panchangam18/background-computer-use/numbers"><img src="https://agentmods.dev/badge/skills/panchangam18/background-computer-use/numbers.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00037 | $0.00253 |
| Opus 5.5 | $0.00015 | $0.00101 |
| Sonnet 5.5 | $0.00007 | $0.00051 |
| Haiku 4.5 | $0.00004 | $0.00025 |
Grade A, and why
numbers 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 1mo 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
Driving Apple Numbers with background computer use
Use these rules in addition to the main computer-use skill:
- Always call
get_app_state app="Numbers"before interacting. - A single
clickselects a cell; double-click orpress_key key="Return"enters edit mode. Triple-click selects the cell's existing value. - Use
Tab/shift+Tab/Return/shift+Returnto move between cells — never embed those as literal characters intype_text. - Prefer
set_valueon Format-inspector numeric inputs (settable=true). - For multi-cell selection, use
dragfrom the top-left cell to the bottom-right cell. - Always re-call
get_app_stateafter switching sheets — the entire tree changes.
Detailed behavior lives in server/app-hints/Numbers.md, which is injected
into <app_hints> on every get_app_state call for Numbers.
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.
- 1mo ago First seen · 23 lines · 37 tokens per session scan A 0d7763230476
numbers is a skill published in the GitHub repository Panchangam18/background-computer-use (5 stars, last pushed 6mo ago), licensed MIT. It adds 37 tokens to every session and 253 once invoked, about $0.0001 per session on Opus 5.5. 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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