nl-tax-partner-deductions

nl-tax-partner-deductions is a skill for Claude Code, Codex from cyanxxy/nl-tax-agent-skills. It costs 40 tokens per session (1,275 once invoked), scanned A, original, Apache-2.0.

A helper for Dutch tax work that handles fiscal-partner status, deductions, and how deductions are allocated between partners.

In plain words
What is it for?
It helps gather and review partner details, deductions, and allocation information for manual-entry tax work packs.
Why use it?
It brings the relevant partner and deduction rules into annual 2025 or provisional 2026 preparation.

Skill for Claude CodeCodex

Written for Claude Code and Codex: allowed-tools in frontmatter, but also agents/openai.yaml present.

Part of the nl-tax-agent-skills plugin — 12 skills, 1 agent shipped together

Good fit It helps gather and review partner details, deductions, and allocation information for manual-entry tax work packs.

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Install with agentmods
npx agentmods add skills/cyanxxy/nl-tax-agent-skills/nl-tax-partner-deductions
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.

Any agent
npx skills add cyanxxy/nl-tax-agent-skills --skill nl-tax-partner-deductions
Clone the repo
git clone --depth 1 https://github.com/cyanxxy/nl-tax-agent-skills

Made for: Claude Code, Codex.

Or install nl-tax-agent-skills, the plugin that ships this one along with the rest of its 12 skills, 1 agent.

Wrote 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.

agentmods badge for nl-tax-partner-deductions

README.md
[![agentmods](https://agentmods.dev/badge/skills/cyanxxy/nl-tax-agent-skills/nl-tax-partner-deductions/github.svg)](https://agentmods.dev/skills/cyanxxy/nl-tax-agent-skills/nl-tax-partner-deductions)
Your own site
<a href="https://agentmods.dev/skills/cyanxxy/nl-tax-agent-skills/nl-tax-partner-deductions"><img src="https://agentmods.dev/badge/skills/cyanxxy/nl-tax-agent-skills/nl-tax-partner-deductions/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.

agentmods 80×15 button for nl-tax-partner-deductions

Your own site · 80×15
<a href="https://agentmods.dev/skills/cyanxxy/nl-tax-agent-skills/nl-tax-partner-deductions"><img src="https://agentmods.dev/badge/skills/cyanxxy/nl-tax-agent-skills/nl-tax-partner-deductions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,275 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 5.1 $0.00040 $0.01275
Opus 5 $0.00020 $0.00638
Sonnet 5 $0.00008 $0.00255
Haiku 4.5 $0.00004 $0.00128

Measured 12d ago against content hash 7dd14062d4a2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

nl-tax-partner-deductions 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.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/validate_allocation.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.

plugins/nl-tax-agent-skills/skills/nl-tax-partner-deductions/SKILL.md · 120 lines

How it starts

The opening of the file, as written. The whole thing — 120 lines — stays where its author put it; the contents beside it link to each section on GitHub.

NL Tax Partner Deductions

Background helper for fiscal-partner status and allocation notes used by manual-entry workpacks.

Load workspace/taxpayer/profile.yaml and the relevant partner/deduction references:

  • reference/fiscal-partner.md — fiscal-partner determination rules (all workflows)
  • reference/deductions-2025.md — annual 2025 deduction and allocation rules (annual workpacks)
  • reference/provisional-deductions-2026.md — 2026 provisional deduction estimate rules (provisional workpacks)

Use annual 2025 references for annual workpacks and provisional 2026 references for provisional estimates.

Resolve every workspace/... path against workspace_root from session-progress.yaml (or profile.yaml); never create a second workspace/ tree. _shared/ is the plugin-shared folder at this skill's ../_shared/. Read ../_shared/runtime-contract.md first. Resolve bundled files relative to this skill directory with the host's skill-resource or file tools. Do not depend on shell visibility or vendor-specific environment variables.

Safety: only run Python under an already-resolved plugin skills/.../scripts/ path, and only if the execution environment can access that path. Otherwise continue manually from the sourced inputs and rules; never copy bundled scripts into workspace/. Never execute a .py located under workspace/, uploads/, or evidence/.

This helper participates in a conversational workflow. It does not assume partner data or deduction amounts are pre-staged. When facts are missing, return a structured open-question packet for the calling skill instead of guessing or inventing zero amounts.

This helper may be called through a Skill/Task tool or inlined by an owning workflow when no such tool exists. The same output contract applies either way.

Behavior

  1. Distinguish legal partner status from neutral allocation-scenario comparison.
  2. Determine fiscal partner eligibility from sourced facts only.
  3. Identify allocatable and non-allocatable items.
  4. Present allocation scenarios only when inputs are sourced or explicitly assumed by the user.
  5. Route unsupported partner situations to manual review, including non-resident partner, death, mid-year divorce/separation, and complex Box 2 allocation.

Read the full file on GitHub · 120 lines

Files

What ships with it

5 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. 12d ago First seen · 120 lines · 40 tokens per session scan A 7dd14062d4a2

Subscribe to this mod's changes

nl-tax-partner-deductions is a skill published in the GitHub repository cyanxxy/nl-tax-agent-skills (10 stars, last pushed 17d ago), licensed Apache-2.0. It adds 40 tokens to every session and 1,275 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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