Borrowing it
Nothing to install: this file belongs to nimbus-agent/Nimbus. 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/nimbus-agent/Nimbus/main/GEMINI.mdgit clone --depth 1 https://github.com/nimbus-agent/NimbusWrote 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/nimbus-agent/nimbus/gemini-md)<a href="https://agentmods.dev/instructions/nimbus-agent/nimbus/gemini-md"><img src="https://agentmods.dev/badge/instructions/nimbus-agent/nimbus/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/nimbus-agent/nimbus/gemini-md"><img src="https://agentmods.dev/badge/instructions/nimbus-agent/nimbus/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 | $0.11663 | $0.11663 |
| Opus 5.5 | $0.04665 | $0.04665 |
| Sonnet 5.5 | $0.02333 | $0.02333 |
| Haiku 4.5 | $0.01166 | $0.01166 |
Grade A, and why
Nimbus 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 today.
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.
The source is not reproduced here
Licensed AGPL-3.0
The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
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.
- today Changed · +1 lines · -25,471 tokens per session scan B → A 5dca9cf8e08e
- yesterday Changed · +175 tokens per session 45f586cc80de
- 2d ago Changed · +1 lines · +388 tokens per session 101e82abe6ee
- 3d ago Changed · +194 tokens per session 7601fa6a8681
- 5d ago Changed · +1 lines · +824 tokens per session 640cc3f3d271
- 6d ago Changed · +1 lines · +260 tokens per session 95da9ee010a4
- 7d ago Changed · +1 lines · +167 tokens per session 949b7e9647ad
- 8d ago Changed · +3 lines · +813 tokens per session 6702801fee4b
- 9d ago Changed · +8 lines · +1,581 tokens per session 454b7548722b
- 10d ago First seen · 318 lines · 32,732 tokens per session scan B 4e851ddab1e8
Nimbus GEMINI.md is an instructions file published in the GitHub repository nimbus-agent/Nimbus (7 stars, last pushed yesterday), licensed AGPL-3.0. It adds 11,663 tokens to every session, about $0.0467 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.
Other instructions, from other repositories
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Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
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Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.