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 getomnico/omni --skill excelgit clone --depth 1 https://github.com/getomnico/omniWrote 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/getomnico/omni/excel)<a href="https://agentmods.dev/skills/getomnico/omni/excel"><img src="https://agentmods.dev/badge/skills/getomnico/omni/excel/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/getomnico/omni/excel"><img src="https://agentmods.dev/badge/skills/getomnico/omni/excel.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.01032 |
| Opus 5.5 | $0.00000 | $0.00413 |
| Sonnet 5.5 | $0.00000 | $0.00206 |
| Haiku 4.5 | $0.00000 | $0.00103 |
Grade A, and why
excel 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 1mo 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 — 77 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Excel Skill
Inspection
After fetching an Excel file with read_document, run excel inspect <file> first via run_bash.
This shows: sheet names, dimensions, merged cell regions, detected header row, and a data preview.
Review the output carefully before writing any processing code.
Data Boundary Detection
Excel sheets often have metadata, titles, or blank rows above the actual data table. Do NOT assume row 1 is the header. Look for these signals:
- Title/metadata rows: single cell with text spanning merged columns, followed by blank rows
- Header row: the first row where most cells are non-empty and contain short text labels
- Data start: the row immediately after the header
- Data end: last consecutive non-empty row (ignore trailing blanks or footnotes)
- Blank columns on the left: skip leading empty columns to find the actual data range
Use excel headers <file> for auto-detected headers per sheet. If detection looks wrong,
use excel rows <file> <sheet> 1:20 to see raw top rows and determine the real header row.
Merged Cell Handling
Merged cells are common in headers (e.g., "Revenue" spanning B-D as a group header with "Jan", "Feb", "Mar" in the row below). They also appear in data rows for grouping.
The excel CLI automatically fills merged regions with the top-left cell's value.
When writing openpyxl code yourself:
- Access merged ranges via
ws.merged_cells.ranges - A merged cell's value lives only in the top-left cell; others return None
- Unmerge and forward-fill before reading data:
for merge in list(ws.merged_cells.ranges): val = ws.cell(merge.min_row, merge.min_col).value ws.unmerge_cells(str(merge)) for r in range(merge.min_row, merge.max_row + 1): for c in range(merge.min_col, merge.max_col + 1): ws.cell(r, c).value = val - Multi-level headers (merged group headers + sub-headers below): read both rows and combine them, e.g., "Revenue | Jan" becomes column name "Revenue - Jan"
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.
- 1mo ago Changed bfad772dd1ab
- 1mo ago First seen · 77 lines · 0 tokens per session scan A c50e50cf362a
excel is a skill published in the GitHub repository getomnico/omni (807 stars, last pushed 26d ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 1,032 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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