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 proompteng/bilig --skill sheetjs-formula-recalcgit clone --depth 1 https://github.com/proompteng/biligWrote 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/proompteng/bilig/sheetjs-formula-recalc)<a href="https://agentmods.dev/skills/proompteng/bilig/sheetjs-formula-recalc"><img src="https://agentmods.dev/badge/skills/proompteng/bilig/sheetjs-formula-recalc/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/proompteng/bilig/sheetjs-formula-recalc"><img src="https://agentmods.dev/badge/skills/proompteng/bilig/sheetjs-formula-recalc.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 23 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 31 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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 | $0.00000 | $0.00383 |
| Opus 5.5 | $0.00000 | $0.00153 |
| Sonnet 5.5 | $0.00000 | $0.00077 |
| Haiku 4.5 | $0.00000 | $0.00038 |
Grade A, and why
@bilig/sheetjs-formula-recalc 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 20d 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
SheetJS Formula Recalculation
Use @bilig/sheetjs-formula-recalc when an agent or Node.js service has changed XLSX
inputs through SheetJS / xlsx and must read recalculated formula outputs
without opening Excel, LibreOffice, or a browser.
First Check
npx --package @bilig/sheetjs-formula-recalc sheetjs-recalc --demo --json
The demo should print verified: true and a Summary!B2 value of 72000.
Real Workbook
npx --package @bilig/sheetjs-formula-recalc sheetjs-recalc workbook.xlsx \
--set Inputs!B2=48 \
--read Summary!B7 \
--out workbook.recalculated.xlsx \
--json
TypeScript
import { recalculateSheetjsWorkbook } from '@bilig/sheetjs-formula-recalc'
const result = recalculateSheetjsWorkbook(inputXlsxBytes, {
edits: [{ target: 'Inputs!B2', value: 48 }],
reads: ['Summary!B7'],
})
Use @bilig/xlsx-formula-recalc when the caller does not care about SheetJS naming,
and use @bilig/exceljs-formula-recalc when the caller owns an ExcelJS Workbook
object and wants read results patched back into that object.
What ships with it
9 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 20d ago Changed · -28 tokens per session 926862a15beb
- 1mo ago First seen · 52 lines · 28 tokens per session scan A 3e91524d5218
@bilig/sheetjs-formula-recalc is a skill published in the GitHub repository proompteng/bilig (35 stars, last pushed 4d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 383 tokens. 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 2026-08-30.
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