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 materialitygit 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/materiality)<a href="https://agentmods.dev/skills/bromso/metapowers/materiality"><img src="https://agentmods.dev/badge/skills/bromso/metapowers/materiality/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/materiality"><img src="https://agentmods.dev/badge/skills/bromso/metapowers/materiality.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 | $0.00062 | $0.00826 |
| Opus 5.5 | $0.00025 | $0.00330 |
| Sonnet 5.5 | $0.00012 | $0.00165 |
| Haiku 4.5 | $0.00006 | $0.00083 |
Grade A, and why
materiality scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 65 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Materiality
Determine materiality thresholds for "$ARGUMENTS". Establish quantitative and qualitative benchmarks to guide which items require adjustment, disclosure, or further investigation.
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/accounting/<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. Most effective after Phase 4 (trial balance) or Phase 7 (statements) when financial totals are available.
Process
-
Select materiality benchmarks:
- Common quantitative benchmarks:
- 5-10% of pre-tax income (for-profit entities)
- 0.5-1% of total revenue
- 0.5-1% of total assets
- 1-2% of total equity
- Choose the benchmark most relevant to the entity's circumstances
- For nonprofits, consider total expenses or total contributions
- Common quantitative benchmarks:
-
Calculate materiality levels:
- Overall materiality — the threshold for the financial statements as a whole
- Performance materiality — a reduced threshold (typically 50-75% of overall) used during testing to allow for undetected misstatements
- Trivial threshold — below this amount, items are clearly inconsequential (typically 5% of overall materiality)
-
Apply qualitative factors:
- Even below quantitative thresholds, items may be material if they:
- Involve fraud or illegal acts
- Affect compliance with debt covenants or regulatory requirements
- Change a trend (e.g., turn a profit into a loss)
- Affect management compensation or bonuses
- Involve related-party transactions
- Were previously communicated as significant
- Even below quantitative thresholds, items may be material if they:
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 · +54 tokens per session 4cbd176c4566
- 1mo ago First seen · 55 lines · 8 tokens per session scan A 8241eec6225f
materiality is a skill published in the GitHub repository bromso/metapowers (3 stars, last pushed today), licensed MIT. It adds 62 tokens to every session and 826 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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