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 Zulelee/test-files-mcp --skill generate-test-filesgit clone --depth 1 https://github.com/Zulelee/test-files-mcpWrote 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/zulelee/test-files-mcp/generate-test-files)<a href="https://agentmods.dev/skills/zulelee/test-files-mcp/generate-test-files"><img src="https://agentmods.dev/badge/skills/zulelee/test-files-mcp/generate-test-files/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/zulelee/test-files-mcp/generate-test-files"><img src="https://agentmods.dev/badge/skills/zulelee/test-files-mcp/generate-test-files.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 | $0.00055 | $0.00445 |
| Opus 5 | $0.00028 | $0.00222 |
| Sonnet 5 | $0.00011 | $0.00089 |
| Haiku 4.5 | $0.00006 | $0.00044 |
Grade A, and why
generate-test-files 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 8d 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.
What it actually says
Generate Test Files
Use the test-files MCP server tools to create files on disk. Always return the absolute path and metadata from the tool response.
When to use
- File upload size or type testing
- Parser/validator error handling
- QA fixtures (large CSV, multi-page PDF, oversized images)
- Corrupted or malformed file testing
- Filename edge cases (unicode, spaces, long names)
Tool selection
| Request | Tool |
|---|---|
| Exact byte size, random/zeros/text content | create_dummy_file_tool |
| JPEG, PNG, WEBP, BMP | create_image_tool |
| Multi-page PDF | create_pdf_tool |
| CSV rows/columns | create_csv_tool |
| Valid or malformed JSON | create_json_tool |
| ZIP archive | create_archive_tool |
| WAV tone or silence | create_audio_tool |
| Corrupted copy of a file | create_corrupted_file_tool |
| Tricky filename | create_edge_case_filename_tool |
| Inspect existing file | inspect_file_tool |
Defaults
- Output directory:
./test-files-output/(orTEST_FILES_OUTPUT_DIR) - Do not overwrite existing files unless
overwrite=true - Respect safety limits (
TEST_FILES_MAX_*env vars)
Examples
- "Create a 20 MB JPEG" →
create_image_toolwithtarget_size_mb=20,format="jpeg" - "CSV with 100,000 rows" →
create_csv_toolwithrows=100000 - "Corrupted PDF" →
create_corrupted_file_toolwithfile_type="pdf" - "30-second silent WAV" →
create_audio_toolwithduration_seconds=30,silence=true
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.
- 8d ago First seen · 48 lines · 55 tokens per session scan A b499bccc8922
generate-test-files is a skill published in the GitHub repository Zulelee/test-files-mcp (0 stars, last pushed 20d ago), licensed MIT. It adds 55 tokens to every session and 445 once invoked, about $0.0003 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 2026-08-31.
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