israeli-id-validator

A tool for checking and formatting Israeli identification numbers, including personal IDs, company numbers, non-profit numbers, and partnership numbers.

In plain words
What is it for?
Use it when building forms, APIs, or applications that validate Teudat Zehut or Israeli business and organization numbers.
Why use it?
It helps catch invalid or incorrectly formatted Israeli numbers and distinguishes common number types.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/squadcodercom/squadcoder/israeli-id-validator
Any agent
npx skills add squadcodercom/squadcoder --skill israeli-id-validator
Clone the repo
git clone --depth 1 https://github.com/squadcodercom/squadcoder

Made for: Claude Code, Codex.

Per session 147 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,515 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00147 $0.02515
Opus 5 $0.00073 $0.01257
Sonnet 5 $0.00029 $0.00503
Haiku 4.5 $0.00015 $0.00251

Measured 2d ago against content hash 9e895b463199, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

israeli-id-validator 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.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/validate_id.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

.squadcoder/skills/israeli-id-validator/SKILL.md · 155 lines

How it starts

The opening of the file, as written. The whole thing — 155 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Israeli ID Validator

Instructions

Step 1: Identify ID Type

Type Prefix Length Example Notes
Teudat Zehut (personal ID) none (cannot be inferred) 9 digits 123456782 Assigned sequentially; the digits encode NO birth date, age, or residency status
Corporate / registered entity first digit 5 9 digits 51-530820-3 Lives in the 5XX-million block; the number begins with 5 and the second digit selects the entity type (codes 50-59, see next table). Same check digit as a personal ID

Corporate and registered-entity codes (first two digits):

Prefix Entity
50 Government company, pension/provident fund, or local committee
51 Private company (Chevra Ba'am / Ltd)
52 Public company
53 Mandatory partnership
54 General partnership
55 Partnership (Shutafut)
56 Foreign company
57 Cooperative society (Aguda Shitufit) / kibbutz
58 Amuta (non-profit) / public-benefit company
59 Endowment (Hekdesh)

Prefix-based typing is a heuristic: a 9-digit number starting with 5 is overwhelmingly a registered entity (corporate numbers are allocated from the 5XX block), but only the issuing registry is authoritative. A personal Teudat Zehut cannot be typed from its prefix.

Step 2: Validate Using Check Digit Algorithm

The Israeli ID check digit algorithm (applies to all types):

def validate_israeli_id(id_number: str) -> bool:
    """Validate Israeli ID number (TZ, company, amuta, etc.)"""
    # Remove dashes and spaces, pad to 9 digits
    id_str = id_number.replace('-', '').replace(' ', '').zfill(9)

    if len(id_str) != 9 or not id_str.isdigit():
        return False

    if id_str == '000000000':   # passes Luhn but is never a real ID
        return False

    total = 0
    for i, digit in enumerate(id_str):
        # Position counting from left: odd positions (0,2,4,6,8) multiply by 1
        # Even positions (1,3,5,7) multiply by 2
        weight = 1 if i % 2 == 0 else 2
        val = int(digit) * weight
        if val > 9:
            val = val // 10 + val % 10     # Sum digits if > 9
        total += val

    return total % 10 == 0

Read the full file on GitHub · 155 lines

Files

What ships with it

6 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.

Changes

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.

  1. 2d ago First seen · 155 lines · 147 tokens per session scan A 9e895b463199

Subscribe to this mod's changes

israeli-id-validator is a skill published in the GitHub repository squadcodercom/squadcoder (11 stars, last pushed 2mo ago), licensed MIT. It adds 147 tokens to every session and 2,515 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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