Borrowing it
Nothing to install: this file belongs to conversiontools/agent-skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/conversiontools/agent-skills/main/GEMINI.mdgit clone --depth 1 https://github.com/conversiontools/agent-skillsWrote 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/instructions/conversiontools/agent-skills/gemini-md)<a href="https://agentmods.dev/instructions/conversiontools/agent-skills/gemini-md"><img src="https://agentmods.dev/badge/instructions/conversiontools/agent-skills/gemini-md/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/instructions/conversiontools/agent-skills/gemini-md"><img src="https://agentmods.dev/badge/instructions/conversiontools/agent-skills/gemini-md.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 | $0.00519 | $0.00519 |
| Opus 5.5 | $0.00208 | $0.00208 |
| Sonnet 5.5 | $0.00104 | $0.00104 |
| Haiku 4.5 | $0.00052 | $0.00052 |
Grade A, and why
agent-skills GEMINI.md 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 — 26 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Conversion Tools Gemini Extension
This extension converts files between 140+ formats using Conversion Tools, via the hosted MCP server (https://mcp.conversiontools.io/mcp). It can also build a custom converter from a plain-language description when no standard converter fits.
Authentication
On first use you will be prompted to authenticate via OAuth - a browser window opens to log in to your Conversion Tools account. Free accounts get 100 conversions per month (10 per day); paid plans are at https://conversiontools.io/pricing.
Usage
Ask Gemini to convert a file and it will pick the right converter automatically:
- "Convert data.json to Excel"
- "Extract the table from invoice.pdf to CSV"
- "Transcribe meeting.mp3 to text"
When no standard converter fits, ask Gemini to build one: "Build a converter that turns this CSV into JSON, one object per invoice with a nested line_items array." The studio_* tools create the converter, run it, and return the result - it persists in your account to continue on the web. Because it persists, you can reuse it later on a new file (studio_list_converters to find it, studio_attach_file to point it at the new file, then run) - no rebuild.
To pull named fields out of documents (invoices, receipts, purchase orders, statements, forms, scans), the parse_* tools drive Parse: "Extract invoice number, date, total and line items from invoice.pdf." Submission is asynchronous by design - parse_extract returns an extraction id, then parse_extraction_status is polled until the extraction is completed or failed, and parse_export turns the result into CSV or XLSX. See https://parse.conversiontools.io/docs.
For files up to 5 MB the agent passes the file base64-encoded as file_content - it reads the file directly and encodes it in-process, rather than relying on a shell base64 one-liner (some agent sandboxes block those as "command substitution"). For files over 5 MB it uses request_upload_url first, then convert_file with the returned file_id.
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 First seen · 26 lines · 519 tokens per session scan A c1cc2a3c66e9
agent-skills GEMINI.md is an instructions file published in the GitHub repository conversiontools/agent-skills (7 stars, last pushed yesterday), licensed MIT. It adds 519 tokens to every session, about $0.0021 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 2026-08-31.
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