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 organizing-t2125-business-use-of-homegit 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/organizing-t2125-business-use-of-home)<a href="https://agentmods.dev/skills/alexteplovcpa/it-contractors-skills/organizing-t2125-business-use-of-home"><img src="https://agentmods.dev/badge/skills/alexteplovcpa/it-contractors-skills/organizing-t2125-business-use-of-home/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/organizing-t2125-business-use-of-home"><img src="https://agentmods.dev/badge/skills/alexteplovcpa/it-contractors-skills/organizing-t2125-business-use-of-home.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 | $0.00107 | $0.01423 |
| Opus 5 | $0.00053 | $0.00711 |
| Sonnet 5 | $0.00021 | $0.00285 |
| Haiku 4.5 | $0.00011 | $0.00142 |
Grade A, and why
organizing-t2125-business-use-of-home 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 — 168 lines — stays where its author put it; the contents beside it link to each section on GitHub.
T2125 Business Use of Home
Organize business-use-of-home facts and amounts for T2125 after the broader expense picture has already been identified.
Core Rules
- Work from actual home expense facts, not assumptions.
- Focus on the workspace allocation and eligible home expenses that may belong in the T2125 business-use-of-home section.
- Preserve uncertainty where the allocation method or support is incomplete.
- Organize and flag, do not advise.
- Do not determine final deductibility.
- Do not determine final GST/HST treatment.
- Do not assume a percentage without facts to support it.
- Do not force home expenses into the calculation without support.
- Do not state that any allocation is definitely correct.
- 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:
- output from
identifying-expense-categories - description of home and workspace
- lease or mortgage details
- utility bills
- home insurance records
- property tax records
- user explanation in chat
Minimum useful input:
- description of workspace used for business
- total home area or a reasonable basis for allocation
- at least one home expense category
Read from the shared input schema where available: case_id, tax_year, engagement_mode, user_profile, facts.business_activity, facts.home_office, documents.expense_support, form_context, review_state.
Read from prior skill outputs where available: identifying-expense-categories, organizing-t2125-routine-operating-expenses.
Workflow
1. Confirm business-use-of-home review is relevant
Check whether available facts suggest the user has a dedicated or regular workspace at home used for earning business income.
Typical indicators: user mentions home office, describes workspace used exclusively or regularly for business, or has home expenses that appear on the expense list.
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 · 168 lines · 107 tokens per session scan A b50b96f80e79
organizing-t2125-business-use-of-home is a skill published in the GitHub repository AlexTeplovCPA/it-contractors-skills (2 stars, last pushed 2mo ago), licensed MIT. It adds 107 tokens to every session and 1,423 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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