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/skills-il/developer-tools/israeli-spreadsheetsnpx skills add skills-il/developer-tools --skill israeli-spreadsheetsgit clone --depth 1 https://github.com/skills-il/developer-toolsWrote 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/developer-tools/israeli-spreadsheets)<a href="https://agentmods.dev/skills/skills-il/developer-tools/israeli-spreadsheets"><img src="https://agentmods.dev/badge/skills/skills-il/developer-tools/israeli-spreadsheets.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 5.1 | $0.00121 | $0.04942 |
| Opus 5 | $0.00060 | $0.02471 |
| Sonnet 5 | $0.00024 | $0.00988 |
| Haiku 4.5 | $0.00012 | $0.00494 |
Grade A, and why
israeli-spreadsheets 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 6d 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 — 268 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Israeli Spreadsheets
Instructions
Step 1: Set Up Python Environment
Install openpyxl:
pip install openpyxl
Step 2: Israeli Financial Constants
- VAT rate: 18% (raised from 17% on 2025-01-01). A rise to 19% was floated at the Finance Ministry but not enacted: the 2026 state budget contains no such increase.
- Tax brackets 2026 (after the 2026 bracket widening): 10% up to 84,120 NIS, 14% up to 120,720, 20% up to 228,000, 31% up to 301,200, 35% up to 560,280, then 47% on every additional shekel. The 20% and 31% bands were widened on 1 January 2026; the other thresholds were carried over from 2025 (frozen through 2027).
- There is no statutory 50% bracket. The official table stops at 47%. The 50% figure comes from adding the Section 121B(a) surtax of 3% on taxable income above 721,560 NIS, which gives 50% effective on personal-exertion income. Section 121B(a1) adds a FURTHER 2% on capital-source income above the same threshold, so investment income above it reaches 5% of surtax, not 3%. Label these as surtax, not as brackets, or a sheet will apply the capital limb to salary.
- Credit point value: 2,904 NIS/year (242 NIS/month). Entitlement is 2.25 points for a male Israeli resident and 2.75 for a female Israeli resident (the extra half point for a woman). Using 2.25 for everyone understates a woman's credit by 1,452 NIS/year.
- Bituach Leumi (employee, resident aged 18 to retirement age): 1.04% up to the reduced-collection step of 7,703 NIS/month, 7.00% above it up to the 51,910 NIS/month maximum insurable income; income above that is not insurable
- Health tax (employee, same category): 3.23% up to 7,703 NIS/month, 5.17% above
- Those two lines are ONE ROW of the official table. The employee rate varies by age, pension status and disability status, and for several categories it is ZERO. See "Step 2.5: the full employee rate table" below before generating any payroll sheet.
Step 2.5: The Full Employee Bituach Leumi / Health Tax Table
What ships with it
7 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.
- 6d ago First seen · 268 lines · 121 tokens per session scan A 403eb1d1dce5
israeli-spreadsheets is a skill published in the GitHub repository skills-il/developer-tools (10 stars, last pushed 4d ago), licensed MIT. It adds 121 tokens to every session and 4,942 once invoked, about $0.0006 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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