Borrowing it
Nothing to install: this file belongs to NimbleBrainInc/nimblebrain. 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/NimbleBrainInc/nimblebrain/main/AGENTS.mdgit clone --depth 1 https://github.com/NimbleBrainInc/nimblebrainWrote 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/nimblebraininc/nimblebrain/agents-md)<a href="https://agentmods.dev/instructions/nimblebraininc/nimblebrain/agents-md"><img src="https://agentmods.dev/badge/instructions/nimblebraininc/nimblebrain/agents-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/nimblebraininc/nimblebrain/agents-md"><img src="https://agentmods.dev/badge/instructions/nimblebraininc/nimblebrain/agents-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 | $0.06271 | $0.06271 |
| Opus 5.5 | $0.02508 | $0.02508 |
| Sonnet 5.5 | $0.01254 | $0.01254 |
| Haiku 4.5 | $0.00627 | $0.00627 |
Grade C, and why
nimblebrain AGENTS.md 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 5d 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.
Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
Reset with `rm -rf .nimblebrain-worktree && bun run dev:worktree`. Share state across worktrees with `NB_WORK_DIR=/abs/path bun run dev:worktree`. Suitable for Chrome DevTools-driven E2E tests against `/v1/*` (no login). Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
**Classification rule:** If a test calls `Runtime.start()`, `startServer()`, `Bun.serve()`, or `spawnSync()`, it belongs in `test/integration/`. Everything else goes in `test/unit/`. The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
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.
- 5d ago Changed · +1 lines · +31 tokens per session 0f4d54f9496f
- 9d ago Changed · +32 tokens per session d6308ce6b16e
- 12d ago Changed · +2 lines · +81 tokens per session 9c024c1fa61b
- 17d ago Changed · -10 tokens per session 9baa0aff8fb1
- 23d ago Changed · +35 tokens per session 4777839527a4
- 25d ago Changed · +1 lines · +194 tokens per session 7841249897e8
- 26d ago Changed · -4 tokens per session 6c32945e1c0c
- 27d ago Changed · +15 tokens per session 1e5e42b51b20
- 29d ago Changed · +2 lines · +94 tokens per session c69c6d882f7e
- 1mo ago First seen · 226 lines · 5,803 tokens per session scan C d5e9fbcfd645
nimblebrain AGENTS.md is an instructions file published in the GitHub repository NimbleBrainInc/nimblebrain (28 stars, last pushed yesterday), with no licence file. It adds 6,271 tokens to every session, about $0.0251 per session on Opus 5.5. A static security scan graded it C with 2 findings (recursive force delete, runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
nimblebrain AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| nimblebrain AGENTS.mdNimbleBrainInc/nimblebrain | Instructions file | 28 | yesterday | none | C | 6,271 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |