Borrowing it
Nothing to install: this file belongs to kychee-com/run402-core. 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/kychee-com/run402-core/main/AGENTS.mdgit clone --depth 1 https://github.com/kychee-com/run402-coreWrote 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/kychee-com/run402-core/agents-md)<a href="https://agentmods.dev/instructions/kychee-com/run402-core/agents-md"><img src="https://agentmods.dev/badge/instructions/kychee-com/run402-core/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/kychee-com/run402-core/agents-md"><img src="https://agentmods.dev/badge/instructions/kychee-com/run402-core/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 | $0.00263 | $0.00263 |
| Opus 5.5 | $0.00105 | $0.00105 |
| Sonnet 5.5 | $0.00053 | $0.00053 |
| Haiku 4.5 | $0.00026 | $0.00026 |
Grade A, and why
run402-core AGENTS.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 22d 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
Agent instructions — run402-core
Start with ARCHITECTURE.md and CONTRIBUTING.md for repo orientation; CLOUD_VS_CORE.md explains what belongs here versus the hosted platform.
Where this code is edited
This repository is a published mirror: its main is generated from the public/run402-core/ directory of Kychee's private platform monorepo and only ever fast-forwards. Maintainers and agents edit the code there, never in a clone of this repository.
- Working inside the monorepo (where this directory is
public/run402-core/): follow the monorepo's rootAGENTS.md. Make a worktree of the monorepo, never a worktree inside this directory; nevergit stash; never create local branches. - Contributing from outside: open a pull request here as usual. A maintainer merges it on GitHub and pulls it back into the monorepo, and the next mirror run carries it forward.
- Commit messages are public. A change to this directory becomes this repository's history with its message unchanged, so keep messages free of private details.
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.
- 22d ago Changed · -14 lines · -372 tokens per session 862badcbc17f
- 1mo ago Changed · -1 tokens per session 9030b73581d4
- 1mo ago Changed · +4 lines · +68 tokens per session 902622549c20
- 2mo ago First seen · 22 lines · 568 tokens per session scan A 2407657e0df1
run402-core AGENTS.md is an instructions file published in the GitHub repository kychee-com/run402-core (20 stars, last pushed 2d ago), licensed Apache-2.0. It adds 263 tokens to every session, about $0.0011 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.
run402-core AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| run402-core AGENTS.mdkychee-com/run402-core | Instructions file | 20 | 2d ago | Apache-2.0 | A | 263 | 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 | yesterday | 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 |