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 cyanxxy/nl-tax-agent-skills --skill nl-tax-field-mappergit clone --depth 1 https://github.com/cyanxxy/nl-tax-agent-skillsWrote 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/cyanxxy/nl-tax-agent-skills/nl-tax-field-mapper)<a href="https://agentmods.dev/skills/cyanxxy/nl-tax-agent-skills/nl-tax-field-mapper"><img src="https://agentmods.dev/badge/skills/cyanxxy/nl-tax-agent-skills/nl-tax-field-mapper/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/cyanxxy/nl-tax-agent-skills/nl-tax-field-mapper"><img src="https://agentmods.dev/badge/skills/cyanxxy/nl-tax-agent-skills/nl-tax-field-mapper.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 | $0.00028 | $0.01797 |
| Opus 5 | $0.00014 | $0.00898 |
| Sonnet 5 | $0.00006 | $0.00359 |
| Haiku 4.5 | $0.00003 | $0.00180 |
Grade A, and why
nl-tax-field-mapper 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 — 169 lines — stays where its author put it; the contents beside it link to each section on GitHub.
NL Tax Field Mapper
Convert a reviewed workpack into a source-traceable manual-entry guide for the official Belastingdienst portal. This skill is the sole writer of both canonical field-map artifacts:
workspace/annual/2025/field-map.yamlworkspace/provisional/2026/field-map.yaml
Annual and provisional workflows invoke it after confirmed workpack creation and never write either map. Continue the same tax conversation; never announce that an internal mapper skill or Python script is taking control.
When to use
Use this skill when:
workspace/annual/2025/return-pack.mdexists and needs its annual map;workspace/provisional/2026/provisional-pack.mdexists and needs its provisional map; or- the user explicitly asks for a manual-entry field map from an existing supported workpack.
An owning annual/provisional workflow invokes this mapper automatically after its explicitly confirmed workpack. That confirmation also authorizes the canonical companion map, so no second mapping request is needed.
If the relevant workpack is absent, explain that it must be prepared first and offer to continue the matching annual or provisional workflow.
Required context
Read ../_shared/runtime-contract.md first.
Resolve workspace/... against workspace_root in
workspace/shared/session-progress.yaml (or profile.yaml); never create a
second workspace tree. Bundled paths are relative to this skill directory and
must be resolved with host resource/file tools, not vendor-specific environment
variables or assumed shell visibility.
Before mapping, read all of
reference/mapper-flow.md. It is the operating
procedure for source records, question packets, canonical-map updates,
validation, rendering, and the completion report. It delegates field policy to:
reference/mapping-principles.mdfor provenance, confidence, omissions, readiness checks, and stable validation IDs, with the machine-checkable rule data canonical inreference/field-map-rules.yaml;reference/annual-field-map.mdfor the 2025 annual submission fields; orreference/provisional-field-map.mdfor the 2026 provisional submission fields.
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.
- agents/openai.yaml 398 B
- assets/icon.png 31 KB
- reference/annual-field-map.md 37 KB
- reference/field-map-rules.yaml 6.4 KB
- reference/mapper-flow.md 8.4 KB
- reference/mapping-principles.md 12 KB
- reference/provisional-field-map.md 16 KB
- scripts/render_field_map.py 7.1 KB runs code
- templates/field-map-template.yaml 3.3 KB
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 · 169 lines · 28 tokens per session scan A f26acddeafee
nl-tax-field-mapper 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 28 tokens to every session and 1,797 once invoked, about $0.0001 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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