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 bromso/metapowers --skill tax-prepgit clone --depth 1 https://github.com/bromso/metapowersWrote 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/bromso/metapowers/tax-prep)<a href="https://agentmods.dev/skills/bromso/metapowers/tax-prep"><img src="https://agentmods.dev/badge/skills/bromso/metapowers/tax-prep/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/bromso/metapowers/tax-prep"><img src="https://agentmods.dev/badge/skills/bromso/metapowers/tax-prep.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 | $0.00051 | $0.00772 |
| Opus 5.5 | $0.00020 | $0.00309 |
| Sonnet 5.5 | $0.00010 | $0.00154 |
| Haiku 4.5 | $0.00005 | $0.00077 |
Grade A, and why
tax-prep scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 71 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Tax Prep
Organize financial records and supporting documents for "$ARGUMENTS" to prepare for tax filing. Compile income, deductions, and credits with proper documentation.
Arguments. $ARGUMENTS may contain the project name and optional flags. Take the first token as <project> and treat --skip-checks as a flag; never include flags in file paths. All paths below use <project>. If --skip-checks is present, skip the prerequisite check and, before writing any artifact, append one line to .metapowers/bookkeeping/<project>/skip-log.md: - <ISO timestamp> — <skill name> skipped prerequisite check for <artifact file> — reason: <reason or "none given">.
Compute with code. Perform every calculation (totals, balances, ratios, variances, projections) with a script — Bash, Python or a spreadsheet formula written to a file — and include the computation alongside the result. Never do arithmetic mentally.
Prerequisites
None — utility skill, run anytime. Works best after completing the four-phase cycle (record, categorize, reconcile, report).
Process
-
Determine tax obligations:
- Entity type (sole proprietorship, LLC, S-corp, C-corp, partnership)
- Tax year and filing deadlines
- Applicable tax forms (1040, 1120, 1065, etc.)
- State and local filing requirements
-
Compile income documentation:
- Revenue by source and category
- 1099s received and issued
- Interest and investment income
- Other income (rental, royalties, gains)
-
Organize deductible expenses:
- Operating expenses by category with totals
- Home office deduction calculation if applicable
- Vehicle and travel expenses with mileage logs
- Depreciation schedules for fixed assets
- Retirement plan contributions
- Health insurance premiums
-
Prepare supporting schedules:
- Asset register with purchase dates and cost basis
- Loan interest statements
- Charitable contribution receipts
- Prior year carryforwards (losses, credits)
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.
- 4d ago Changed · +10 lines · +41 tokens per session 2c3fad7ec3f2
- 1mo ago First seen · 61 lines · 10 tokens per session scan A 7f7858d6876f
tax-prep is a skill published in the GitHub repository bromso/metapowers (3 stars, last pushed today), licensed MIT. It adds 51 tokens to every session and 772 once invoked, about $0.0002 per session on Opus 5.5. 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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