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 richardhe-fundamenta/practical-gcp-examples --skill python-runnergit clone --depth 1 https://github.com/richardhe-fundamenta/practical-gcp-examplesWrote 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/richardhe-fundamenta/practical-gcp-examples/python-runner)<a href="https://agentmods.dev/skills/richardhe-fundamenta/practical-gcp-examples/python-runner"><img src="https://agentmods.dev/badge/skills/richardhe-fundamenta/practical-gcp-examples/python-runner/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/richardhe-fundamenta/practical-gcp-examples/python-runner"><img src="https://agentmods.dev/badge/skills/richardhe-fundamenta/practical-gcp-examples/python-runner.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 | $0.00024 | $0.00252 |
| Opus 5.5 | $0.00010 | $0.00101 |
| Sonnet 5.5 | $0.00005 | $0.00050 |
| Haiku 4.5 | $0.00002 | $0.00025 |
Grade A, and why
python-runner 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.
What it actually says
python-runner
When the user asks for a computation or transformation:
- Write a short, self-contained Python script that prints its result to stdout.
- Call the
run_codetool with that script ascode. - Report the stdout back to the user as the answer.
Constraints (the sandbox enforces these structurally):
- No network access. Standard library only unless the runtime image provides a package.
- The script must
print()its text result — stdout is returned. - Files you write to the working directory are returned to the user as attachments; for binary results (images, etc.) write a file rather than printing bytes.
- Uploaded files are available by name (e.g.
open("data.csv")). Never hardcode or reconstruct a file's contents from memory — if a file you need isn't in the working directory, ask the user to attach it rather than inventing the data. - If run_code returns an error, read it, fix the script, and call run_code again.
- Keep scripts short and deterministic.
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 · 25 lines · 24 tokens per session scan A b7b613761426
python-runner is a skill published in the GitHub repository richardhe-fundamenta/practical-gcp-examples (62 stars, last pushed 5d ago), licensed MIT. It adds 24 tokens to every session and 252 once invoked, about $0.0001 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 2026-08-30.
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