bilig: Skill for Claude Code

.agents/skills/bilig-workpaper/SKILL.md

bilig-workpaper is a skill for Claude Code, Codex from proompteng/bilig. It costs 29 tokens per session (2,088 once invoked), scanned A, original, MIT.

A skill for using Bilig WorkPaper as a file- and tool-based alternative to spreadsheet UI automation. WorkPaper provides spreadsheet-style formulas and predictable cell addresses.

In plain words
What is it for?
Use it for pricing, quotes, budgets, payouts, imports, forecasts, formula readback, and agent tools that need to edit and verify workbook cells.
Why use it?
It supports repeatable workbook calculations and formula checks from code, terminal commands, HTTP routes, or MCP tools without driving Excel or another spreadsheet window.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents); mentions OpenCode.

This is proompteng/bilig's own configuration. It tells Claude Code and Codex how to work on bilig itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything bilig configures →

Reuse

Borrowing it

Nothing to install: this file belongs to proompteng/bilig. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/proompteng/bilig/main/.agents/skills/bilig-workpaper/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/proompteng/bilig

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for bilig-workpaper

README.md
[![agentmods](https://agentmods.dev/badge/skills/proompteng/bilig/bilig-workpaper/github.svg)](https://agentmods.dev/skills/proompteng/bilig/bilig-workpaper)
Your own site
<a href="https://agentmods.dev/skills/proompteng/bilig/bilig-workpaper"><img src="https://agentmods.dev/badge/skills/proompteng/bilig/bilig-workpaper/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.

agentmods 80×15 button for bilig-workpaper

Your own site · 80×15
<a href="https://agentmods.dev/skills/proompteng/bilig/bilig-workpaper"><img src="https://agentmods.dev/badge/skills/proompteng/bilig/bilig-workpaper.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,088 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
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 78
    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 79
    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]
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00029 $0.02088
Opus 5.5 $0.00012 $0.00835
Sonnet 5.5 $0.00006 $0.00418
Haiku 4.5 $0.00003 $0.00209

Measured 2mo ago against content hash 1d02c3fd8fe3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

bilig-workpaper 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 2mo 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

.agents/skills/bilig-workpaper/SKILL.md · 231 lines

How it starts

The opening of the file, as written. The whole thing — 231 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Bilig WorkPaper Agent Skill

Use this skill when an agent needs spreadsheet-style formulas but the work should run through files, terminal commands, TypeScript, HTTP routes, or MCP tools instead of Excel UI automation.

When To Trigger

Trigger this skill for tasks involving:

  • workbook-shaped business logic in Node.js services;
  • formula readback after writing cells;
  • quote, budget, payout, pricing, import-validation, or forecast models;
  • agent spreadsheet tools that need deterministic cell addresses;
  • MCP clients that can run a stdio server or call a Streamable HTTP endpoint;
  • reduced formula/import bugs that need a local report.

Do not trigger it for manual spreadsheet editing, Office macros, VBA, pivots, charts, COM automation, or exact Excel desktop behavior unless the user explicitly asks to compare Bilig against an Excel oracle.

Command Safety

Do not build shell commands by concatenating user text. Treat the commands below as literal templates, validate workbook paths before use, and reject values containing newlines, backticks, $(, ;, &, |, <, or >. Prefer MCP client command plus args arrays or direct TypeScript calls when inserting user-provided paths or cell references.

First Check: Agent Triage

Before wiring a client or opening a spreadsheet UI, print the compact decision card:

{
  "command": "npm",
  "args": ["exec", "--yes", "--package", "@bilig/workpaper@latest", "--", "bilig-agent-start", "--json"]
}

First Check: Agent Evaluator

Before wiring a client, prove the published agent door with the package-owned evaluator. It exercises MCP discovery, cell mutation, formula readback, JSON export, restart restore, and returns verified: true:

{
  "command": "npm",
  "args": ["exec", "--yes", "--package", "@bilig/workpaper@latest", "--", "bilig-evaluate", "--door", "agent-mcp", "--json"]
}

For service-owned WorkPaper logic without MCP, run bilig-evaluate --door workpaper-service --json. Use the lower-level challenge commands only when debugging the direct API loop or file-backed MCP JSON-RPC transcript:

Read the full file on GitHub · 231 lines

Changes

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.

  1. 2mo ago First seen · 231 lines · 29 tokens per session scan A 1d02c3fd8fe3

Subscribe to this mod's changes

bilig-workpaper is a skill published in the GitHub repository proompteng/bilig (35 stars, last pushed 3d ago), licensed MIT. It adds 29 tokens to every session and 2,088 once invoked, about $0.0001 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 2026-08-30.

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