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 open-octo/octo-agent --skill office-xlsxgit clone --depth 1 https://github.com/open-octo/octo-agentWrote 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/open-octo/octo-agent/office-xlsx)<a href="https://agentmods.dev/skills/open-octo/octo-agent/office-xlsx"><img src="https://agentmods.dev/badge/skills/open-octo/octo-agent/office-xlsx/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/open-octo/octo-agent/office-xlsx"><img src="https://agentmods.dev/badge/skills/open-octo/octo-agent/office-xlsx.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 | $0.00077 | $0.01747 |
| Opus 5 | $0.00039 | $0.00873 |
| Sonnet 5 | $0.00015 | $0.00349 |
| Haiku 4.5 | $0.00008 | $0.00175 |
Grade C, and why
office-xlsx scanned grade C with 2 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 11d 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.
Downloads and executes remote codehighSupply chain
curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.
- **`uv` absent** — do not assume `python3`/`pip` are available or silently install anything. Tell the user what's missing (`uv`, installable via `curl -LsSf https://astral.sh/uv/install.sh | sh` on macOS/Linux or the eq Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- **`uv` absent** — do not assume `python3`/`pip` are available or silently install anything. Tell the user what's missing (`uv`, installable via `curl -LsSf https://astral.sh/uv/install.sh | sh` on macOS/Linux or the eq How it starts
The opening of the file, as written. The whole thing — 78 lines — stays where its author put it; the contents beside it link to each section on GitHub.
XLSX Manipulation
Two scripts drive this skill, both built on openpyxl:
scripts/xlsx_inspect.py— read a workbook and print its structure (sheets, dimensions, header row, sample rows, formulas, merged cells) as JSON. Use this first on any existing file so you know what you're working with before editing it.scripts/xlsx_edit.py— create a new workbook or edit an existing one by applying a JSON list of operations (set cell values/formulas, styling, merges, column widths, new sheets, charts, data validation).
Both scripts are self-contained: they declare their own dependency (openpyxl) via PEP 723 inline metadata, so uv run installs it into an ephemeral environment automatically — no project venv, no pip install step, nothing left behind on the machine.
Preflight: check for uv
Look at this session's toolchain note (or run uv --version) before the first script call:
uvpresent — run scripts directly:uv run <skill-dir>/scripts/xlsx_inspect.py <args>. Dependency install is automatic and silent; don't run a separatepip install openpyxlstep, it isn't needed and may not even land in the environmentuv runactually uses.uvabsent — do not assumepython3/pipare available or silently install anything. Tell the user what's missing (uv, installable viacurl -LsSf https://astral.sh/uv/install.sh | shon macOS/Linux or the equivalent on Windows — see https://docs.astral.sh/uv/getting-started/installation/) and wait for their go-ahead before installing. If they'd rather not installuv, the fallback is a manualpython3 -m venv/pip install openpyxland running the scripts withpython3instead ofuv run— but only after checking with the user, and only ifpython3/pipare themselves confirmed present.
Note: <skill-dir>/scripts/... paths are relative to this skill's own directory (its absolute path is in the location header injected when this skill is loaded) — they are not relative to the user's working directory. There is no persistent working directory across terminal calls; pass absolute paths for --input/--output/--ops.
What ships with it
4 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.
- 11d ago First seen · 78 lines · 77 tokens per session scan C 9fea6c6ec9d7
office-xlsx is a skill published in the GitHub repository open-octo/octo-agent (97 stars, last pushed yesterday), licensed MIT. It adds 77 tokens to every session and 1,747 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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