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 OpenLAIR/OpenSkill --skill evo-excel-workbook-formula-iogit clone --depth 1 https://github.com/OpenLAIR/OpenSkillWrote 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/openlair/openskill/evo-excel-workbook-formula-io)<a href="https://agentmods.dev/skills/openlair/openskill/evo-excel-workbook-formula-io"><img src="https://agentmods.dev/badge/skills/openlair/openskill/evo-excel-workbook-formula-io/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/openlair/openskill/evo-excel-workbook-formula-io"><img src="https://agentmods.dev/badge/skills/openlair/openskill/evo-excel-workbook-formula-io.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 | $0.00046 | $0.00410 |
| Opus 5 | $0.00023 | $0.00205 |
| Sonnet 5 | $0.00009 | $0.00082 |
| Haiku 4.5 | $0.00005 | $0.00041 |
Grade A, and why
evo-excel-workbook-formula-io 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 yesterday.
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
This skill handles workbook I/O and formula injection only.
Knowledge internalized:
- Use
openpyxl.load_workbook(filename=..., read_only=False, data_only=False, keep_vba=False, keep_links=True)for editable.xlsxworkbooks. - Access sheets with
wb['Task']style, not deprecated APIs. - Write formulas as English Excel formulas beginning with
=and using comma separators. - Preserve workbook structure by modifying only existing sheets/cells; do not create/remove sheets.
openpyxldoes not calculate formulas; for reliable cached values on Linux, start LibreOffice headless with a UNO socket, open the workbook, callcalculateAll(), and save/close it. Use plain--convert-toonly as fallback.- Validation should confirm required sheets exist before writing.
- When multiple skills have
utils.py, use importlib file-based loading to avoid module-name collisions.
Functions:
load_editable_workbook(path)load_cached_workbook(path)verify_required_sheets(wb, required_sheets)write_formula_block(ws, formula_map)save_workbook(wb, path)force_recalculate_libreoffice(file_path, out_dir=None)
Portable import example:
import importlib.util
def load_module(module_name, path):
spec = importlib.util.spec_from_file_location(module_name, path)
module = importlib.util.module_from_spec(spec)
spec.loader.exec_module(module)
return module
io_utils = load_module('excel_io_utils', '/app/environment/skills/evo-excel-workbook-formula-io/scripts/utils.py')
wb = io_utils.load_editable_workbook('/root/gdp.xlsx')
What ships with it
1 file 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.
- yesterday First seen · 38 lines · 46 tokens per session scan A a431ee478009
evo-excel-workbook-formula-io is a skill published in the GitHub repository OpenLAIR/OpenSkill (90 stars, last pushed 2d ago), licensed Apache-2.0. It adds 46 tokens to every session and 410 once invoked, about $0.0002 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 2026-09-11.
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