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 skills-il/tax-and-finance --skill israeli-arnona-optimizergit clone --depth 1 https://github.com/skills-il/tax-and-financeWrote 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/skills-il/tax-and-finance/israeli-arnona-optimizer)<a href="https://agentmods.dev/skills/skills-il/tax-and-finance/israeli-arnona-optimizer"><img src="https://agentmods.dev/badge/skills/skills-il/tax-and-finance/israeli-arnona-optimizer/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/skills-il/tax-and-finance/israeli-arnona-optimizer"><img src="https://agentmods.dev/badge/skills/skills-il/tax-and-finance/israeli-arnona-optimizer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00140 | $0.06753 |
| Opus 5 | $0.00070 | $0.03377 |
| Sonnet 5 | $0.00028 | $0.01351 |
| Haiku 4.5 | $0.00014 | $0.00675 |
Grade A, and why
israeli-arnona-optimizer 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 12d 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 — 259 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Israeli Arnona Optimizer
Legal notice
This is a free information tool operated by an AI model. It explains the tax rules and helps you organise your own figures. All of its outputs are produced automatically by an AI model, with no involvement, review, or approval by a tax adviser or accountant. The output is not a tax opinion, not a return prepared by a licensed representative, and not professional advice, but a general calculation and explanation only: it does not examine the full extent of your income or your complete documents. An AI model may err, omit data, or present a wrong conclusion.
Any form or text this tool produces is an automatic draft for your personal preparation only, and is not a filed return. Responsibility for reporting and for paying the tax is yours, the binding computation is the Tax Authority's, and representation before the Tax Authority is reserved to those permitted by law. This tool is not a substitute for advice that takes account of the particular circumstances and needs of each person. Consult a tax adviser or accountant before filing or paying. All use of its output is the user's sole responsibility.
Instructions
Step 1: Gather Property Details
Before performing any arnona calculation, collect the following information from the user:
- Municipality (iriya): Which city or local council the property is located in (e.g., Tel Aviv-Yafo, Jerusalem, Haifa, Beer Sheva, Netanya, Rishon LeZion).
- Property area: Total area in square meters (sqm). Distinguish between main area and auxiliary areas (storage rooms, balconies, parking) as these are billed at different rates.
- Zone classification: The arnona zone within the municipality. Each city divides into zones (azor) with different rate tiers. Ask the user for their zone or help them determine it from their address.
- Usage type: Residential (megurim), commercial (mishari), office (misrad), industrial (taasia), or other special uses. Rates differ significantly by usage.
- Billing period: Arnona is billed bimonthly (every two months) in most municipalities. The annual rate is divided into 6 payment periods.
What ships with it
9 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.
- 12d ago First seen · 259 lines · 140 tokens per session scan A 3f3fce393b9d
israeli-arnona-optimizer is a skill published in the GitHub repository skills-il/tax-and-finance (34 stars, last pushed 3d ago), licensed MIT. It adds 140 tokens to every session and 6,753 once invoked, about $0.0007 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 2026-08-30.
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