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 AlexTeplovCPA/it-contractors-skills --skill reviewing-instalments-and-tax-paymentsgit clone --depth 1 https://github.com/AlexTeplovCPA/it-contractors-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/alexteplovcpa/it-contractors-skills/reviewing-instalments-and-tax-payments)<a href="https://agentmods.dev/skills/alexteplovcpa/it-contractors-skills/reviewing-instalments-and-tax-payments"><img src="https://agentmods.dev/badge/skills/alexteplovcpa/it-contractors-skills/reviewing-instalments-and-tax-payments/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/alexteplovcpa/it-contractors-skills/reviewing-instalments-and-tax-payments"><img src="https://agentmods.dev/badge/skills/alexteplovcpa/it-contractors-skills/reviewing-instalments-and-tax-payments.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 | $0.00090 | $0.01240 |
| Opus 5 | $0.00045 | $0.00620 |
| Sonnet 5 | $0.00018 | $0.00248 |
| Haiku 4.5 | $0.00009 | $0.00124 |
Grade A, and why
reviewing-instalments-and-tax-payments 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 — 155 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Reviewing Instalments and Tax Payments
Review tax instalment payments and prior tax payment facts for a Canadian IT contractor.
Core Rules
- Organize and flag instalment and payment facts, do not advise on instalment obligations.
- Do not calculate instalment interest or penalties.
- Do not determine whether the user's instalments were sufficient.
- Do not determine the final balance owing or refund.
- Preserve uncertainty where payment dates, amounts, or CRA records are incomplete.
- Do not state that the user's instalments are correct or sufficient.
- Do not state that the user is ready to file.
- Use this phrase where relevant: "That is outside what this workflow covers. It is a question for a CPA before you file."
Inputs
Do not ask the user to share SIN, business number, account numbers, or client names. Use general descriptions and rounded amounts.
Accept any of:
- CRA instalment reminder notices
- bank records showing tax payments
- My Account payment history description
- prior year T1 return summary
- user explanation in chat
Minimum useful input:
- at least one tax payment made during the year
- approximate date and amount
Read from the shared input schema where available: case_id, tax_year, engagement_mode, user_profile, facts.tax_payments, documents.cra_notices, form_context, review_state.
Read from prior skill outputs where available: identifying-income-sources, organizing-t2125-gross-business-income.
Workflow
1. Confirm instalment review is relevant
Check whether the user made tax payments during the year or received instalment reminders from CRA. If no payments were made and no reminders received, note this and return an appropriate status.
2. Organize instalment payment facts
For each payment, identify:
- approximate payment date
- approximate amount
- payment method if known
- whether the payment matches a CRA instalment reminder amount
Do not reconstruct payment history from incomplete information.
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 · 155 lines · 90 tokens per session scan A 496cfda85235
reviewing-instalments-and-tax-payments is a skill published in the GitHub repository AlexTeplovCPA/it-contractors-skills (2 stars, last pushed 2mo ago), licensed MIT. It adds 90 tokens to every session and 1,240 once invoked, about $0.0005 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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