Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/johnhout/knowledge-work-belastingzakennpx agentmods add commands/johnhout/knowledge-work-belastingzaken/vpb-aangifteWrote 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/commands/johnhout/knowledge-work-belastingzaken/vpb-aangifte)<a href="https://agentmods.dev/commands/johnhout/knowledge-work-belastingzaken/vpb-aangifte"><img src="https://agentmods.dev/badge/commands/johnhout/knowledge-work-belastingzaken/vpb-aangifte/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/commands/johnhout/knowledge-work-belastingzaken/vpb-aangifte"><img src="https://agentmods.dev/badge/commands/johnhout/knowledge-work-belastingzaken/vpb-aangifte.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00008 | $0.00402 |
| Opus 5 | $0.00004 | $0.00201 |
| Sonnet 5 | $0.00002 | $0.00080 |
| Haiku 4.5 | $0.00001 | $0.00040 |
Grade A, and why
vpb-aangifte 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 10d 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.
What it actually says
VPB Aangifte / Corporate Income Tax Filing
If placeholders are unclear, see CONNECTORS.md.
Important / Belangrijk: This workflow support is not legal or fiscal advice. Require review by a qualified Dutch tax professional.
Prepare vennootschapsbelasting workflow for BV entities with evidence mapping and risk checks.
Usage
/belastingadviseur:vpb-aangifte <boekjaar>
Workflow
- Confirm entity and year context:
- Book year and entity details
- Special circumstances (fiscal unity, restructuring, cross-border activity)
- Gather source records:
- Trial balance and annual accounts
- Prior assessments and carryforwards
- Supporting schedules for material tax adjustments
- Build fiscal bridge:
- Commercial result to fiscal profit mapping
- Adjustment categories and evidence traceability
- Flag uncertain positions for escalation
- Official-source verification:
- Verify filing deadlines and process instructions on
belastingdienst.nl - Verify legal references and article citations on
wetten.overheid.nl - Add URL and retrieval date for each legal or rule-sensitive assertion
- Fallback behavior:
- If
~~data warehouseor~~boekhoudingis not connected, use manual uploads - If supporting evidence is incomplete, output as draft with blockers
- If verification is incomplete, mark as not final
Required Output Format (Use Exactly)
Context / ContextAssumptions / AannamesRequired Documents / Benodigde stukkenStep-by-step / StappenplanChecks & Risks / Controles en risico'sNext Actions / Volgende actiesSources (official) / Bronnen (officieel)Professional Review Disclaimer / Disclaimer deskundige beoordeling
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.
- 10d ago First seen · 56 lines · 8 tokens per session scan A 44a78d56d51b
vpb-aangifte is a command published in the GitHub repository johnhout/knowledge-work-belastingzaken (6 stars, last pushed 6mo ago), licensed MIT. It adds 8 tokens to every session and 402 once invoked, about $0.0000 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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