agentmods.dev

core-ai: Instructions file for Claude Code

CLAUDE.md

core-ai CLAUDE.md is an instructions file for Claude Code from helius-labs/core-ai. It costs 1,736 tokens per session, scanned A, original, MIT.

Repository instructions for core-ai, a monorepo containing Helius developer tools released as separate packages for AI assistants and Solana development.

In plain words
What is it for?
They guide compiler-managed synchronization, MCP server pinning, skill versioning, and maintenance of Claude Code, Cursor, Codex, and CLI packages.
Why use it?
They help an agent keep generated files, package versions, MCP server references, and supported integrations consistent across the repository.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions Claude Code; mentions AGENTS.md; mentions Codex.

This is helius-labs/core-ai's own configuration. It tells Claude Code how to work on core-ai itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything core-ai configures →

not rated 29repo changed today A scan 1,736 tokens original MIT
View source ↗ helius-labs/core-ai
Reuse

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.

Copy the file
curl -O https://raw.githubusercontent.com/helius-labs/core-ai/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/helius-labs/core-ai

Made for: Claude Code.

Wrote 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.

agentmods badge for core-ai CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/helius-labs/core-ai/claude-md/github.svg)](https://agentmods.dev/instructions/helius-labs/core-ai/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/helius-labs/core-ai/claude-md"><img src="https://agentmods.dev/badge/instructions/helius-labs/core-ai/claude-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.

agentmods 80×15 button for core-ai CLAUDE.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/helius-labs/core-ai/claude-md"><img src="https://agentmods.dev/badge/instructions/helius-labs/core-ai/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,736 This file is loaded in full into every session.
When invoked 1,736 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.01736 $0.01736
Opus 5.5 $0.00694 $0.00694
Sonnet 5.5 $0.00347 $0.00347
Haiku 4.5 $0.00174 $0.00174

Measured today against content hash b57d3ede2aad, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

core-ai CLAUDE.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.

CLAUDE.md · 77 lines

How it starts

The opening of the file, as written. The whole thing — 77 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Core AI

Monorepo containing Helius developer tools distributed as independent packages:

  • helius-mcp/ — MCP server (npm: helius-mcp) — AI-assistant agnostic
  • helius-skills/ — Standalone Claude Code skill (installed via install.sh)
  • helius-plugin/ — Claude Code plugin (all-in-one: bundles skill + auto-starts MCP)
  • helius-cursor/ — Cursor plugin (all-in-one: bundles skill + auto-starts MCP)
  • helius-cli/ — CLI for account setup (npm: helius-cli)

Compiler-managed sync

The compiler (npx tsx scripts/compile-skills.ts) is the source of truth for everything generated from helius-skills/. It writes:

  1. helius-skills/<skill>/SKILL.md frontmatter version (re-injected from versions.json) and every helius-mcp@<version> mention in the body
  2. .agents/skills/<skill>/ — Codex-native SKILL.md + 3 prompt variants (openai.developer.md, claude.system.md, full.md)
  3. helius-mcp/system-prompts/<skill>/ — same prompt variants, npm-shipped
  4. helius-plugin/skills/<dir>/references/ and helius-plugin/skills/<dir>/SKILL.md (refs bytewise from canonical; SKILL.md gets version re-injected)
  5. helius-cursor/skills/<dir>/references/ and helius-cursor/skills/<dir>/SKILL.md (same)
  6. helius-plugin/.mcp.json and helius-cursor/.mcp.json — generated from the helius-mcp pin in versions.json
  7. helius-skills/<skill>/references/*.md and helius-skills/<skill>/install.sh — the helius-mcp@<version> token only
  8. helius-skills/<skill>/references/ copies of shared references — rendered from helius-skills/shared/references/ for every skill that lists them in sharedRefs (see SKILLS in the compiler)
  9. .gitattributes — the block between the compile-skills markers, marking every generated path linguist-generated so GitHub collapses it in PR diffs

Run npx tsx scripts/compile-skills.ts after any change in helius-skills/. CI runs --check mode and fails on drift.

Shared references (Sender, DAS, WebSockets, priority fees, Wallet API, onboarding, LaserStream, Enhanced Transactions) have one source in helius-skills/shared/references/. Edit them there, never in a skill's references/ copy — those copies carry a "Generated from" header and --check fails if one is hand-edited. The compiler rewrites links between references to each skill's filenames, and turns a link to a reference the skill does not include into a link to the matching docs page (SHARED_REF_DOCS). A skill that needs its own version of a reference leaves it out of sharedRefs and owns the file, as helius-phantom does for its @solana/kit Sender and priority-fee references.

Read the full file on GitHub · 77 lines

Changes

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.

  1. today Changed · +8 lines · +402 tokens per session b57d3ede2aad
  2. 1mo ago First seen · 69 lines · 1,334 tokens per session scan A 9c8f172ffeaa

Subscribe to this mod's changes

core-ai CLAUDE.md is an instructions file published in the GitHub repository helius-labs/core-ai (29 stars, last pushed today), licensed MIT. It adds 1,736 tokens to every session, about $0.0069 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.

Building agentsai-toolsclaude-skillscursormcpsolana
Related

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).

microsoft/vscode · 9,649 tokens

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.

vercel/next.js · 7,549 tokens

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).

microsoft/vscode · 5,262 tokens

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.

langchain-ai/langchain · 4,680 tokens

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).

microsoft/vscode · 2,731 tokens

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.

denoland/deno · 3,077 tokens