Borrowing it
Nothing to install: this file belongs to helius-labs/core-ai. 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/helius-labs/core-ai/main/AGENTS.mdgit clone --depth 1 https://github.com/helius-labs/core-aiWrote 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/helius-labs/core-ai/agents-md)<a href="https://agentmods.dev/instructions/helius-labs/core-ai/agents-md"><img src="https://agentmods.dev/badge/instructions/helius-labs/core-ai/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/helius-labs/core-ai/agents-md"><img src="https://agentmods.dev/badge/instructions/helius-labs/core-ai/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 | $0.02000 | $0.02000 |
| Opus 5.5 | $0.00800 | $0.00800 |
| Sonnet 5.5 | $0.00400 | $0.00400 |
| Haiku 4.5 | $0.00200 | $0.00200 |
Grade B, and why
core-ai AGENTS.md scanned grade B with 1 finding 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.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
For Codex, run `codex mcp add helius -- npx helius-mcp@latest` or add to `.codex/config.toml` (or `~/.codex/config.toml` for global): How it starts
The opening of the file, as written. The whole thing — 156 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Core AI — Agent Instructions
This file is the Layer A harness for Codex CLI and other OpenAI-compatible agents. Skills in
.agents/skills/provide the domain expertise (Layer B).
Repository Overview
This monorepo contains Helius developer tools for building on Solana:
| Package | What it does |
|---|---|
helius-mcp/ |
MCP server (npx helius-mcp@latest) — exposes 10 public tools total: 9 routed domain tools plus expandResult |
helius-skills/ |
Canonical skill source — SKILL.md + reference files for each domain |
helius-plugin/ |
Claude Code plugin — bundles skills + auto-starts MCP server |
helius-cli/ |
CLI for account setup, blockchain queries, and staking (npx helius-cli@latest) |
MCP Server Setup
The Helius MCP server provides live blockchain access through 10 public tools total: 9 routed domain tools plus expandResult. Configure it as an MCP tool source:
npx helius-mcp@latest
This works with any MCP-compatible client. Use a domain tool such as heliusWallet, heliusAsset, or heliusStreaming plus action: "getBalance", action: "getAssetsByOwner", or action: "createWebhook" to call a specific Helius action. Use expandResult for summary-first follow-ups.
For Codex, run codex mcp add helius -- npx helius-mcp@latest or add to .codex/config.toml (or ~/.codex/config.toml for global):
[mcp_servers.helius]
command = "npx"
args = ["helius-mcp@latest"]
For other MCP clients, add to your project's .mcp.json:
{
"mcpServers": {
"helius": {
"command": "npx",
"args": ["helius-mcp@latest"]
}
}
}
API Key Setup
Most tools require a Helius API key. Three paths:
Path A — Existing key: Set the HELIUS_API_KEY environment variable, or call the setHeliusApiKey MCP tool.
Path B — Signup: Call generateKeypair → signup with mode: "link" (returns a hosted paymentUrl the user opens in a browser) → after payment, signup with mode: "resume". Or mode: "autopay" to pay USDC from the local keypair (wallet must hold ~0.001 SOL + the plan amount in USDC). API key is configured automatically.
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 · 156 lines · 2,000 tokens per session scan B 205138468820
core-ai AGENTS.md is an instructions file published in the GitHub repository helius-labs/core-ai (29 stars, last pushed today), licensed MIT. It adds 2,000 tokens to every session, about $0.0080 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
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.