Sui is a blockchain platform for running smart contracts and managing digital assets, using the Move programming language and a network of authorities to process transactions. It is intended for developers building web3 applications and on-chain assets.
Borrowing it
Nothing to install: this file belongs to MystenLabs/sui. 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/MystenLabs/sui/main/CLAUDE.mdgit clone --depth 1 https://github.com/MystenLabs/suiWrote 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/mystenlabs/sui/claude-md)<a href="https://agentmods.dev/instructions/mystenlabs/sui/claude-md"><img src="https://agentmods.dev/badge/instructions/mystenlabs/sui/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.
<a href="https://agentmods.dev/instructions/mystenlabs/sui/claude-md"><img src="https://agentmods.dev/badge/instructions/mystenlabs/sui/claude-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 | $0.01650 | $0.01650 |
| Opus 5.5 | $0.00660 | $0.00660 |
| Sonnet 5.5 | $0.00330 | $0.00330 |
| Haiku 4.5 | $0.00165 | $0.00165 |
Grade A, and why
sui 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 2d 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.
How it starts
The opening of the file, as written. The whole thing — 165 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
Crate-specific CLAUDE.md files
When a sub-crate's CLAUDE.md conflicts with this file, the sub-crate's instructions win.
Individual Preferences
Individual preferences supersede and extend project preferences:
- @CLAUDE.local.md if present.
Essential Development Commands
License comments
All applicable source code files must start with the following license in comments at the top of the file:
Copyright (c) Mysten Labs, Inc.
SPDX-License-Identifier: Apache-2.0
Building and Installation
# Build a specific crate. Generally don't need to do release build.
cargo build -p sui-core
# Check code without code generation or linking (preferred)
cargo check
Testing
# Run e2e tests. simtests must be run with `cargo simtest` to avoid false negatives
cargo simtest -p sui-e2e-tests
# Run Rust unittests. skip simulation tests as they may cause false negatives with `cargo nextest`
SUI_SKIP_SIMTESTS=1 cargo nextest run -p <crate-name>
Important Notes for Testing:
- When compiling or running tests in this repository, set timeout limits to at least 10 minutes due to the large codebase size
- For faster iteration, use -p to select only the most relevant packages for testing. Use multiple
-pflags if necessary, e.g.cargo nextest run -p sui-types -p sui-core - Use
cargo nextest run --libto run only library tests and skip integration tests for faster feedback - Use a scoped
cargo insta testfor the relevant package when snapshots are affected. Inspect the generated snapshot diffs. If they match the intended changes, update them withcargo insta accept. Do not accept unrelated snapshot changes. - Consult crate-specific CLAUDE.md files for instructions on which tests to run, when changing files in those crates
Linting and Formatting
# Formats & lints all Rust & Move (can be slow).
./scripts/lint.sh
# For formatting:
cargo fmt --all
# Lint a single crate in `crates/`, `consensus/`, `sui-execution/`:
cargo xclippy -p <crate-name>
# Linting all crates in `external-crates/`: cd into the crate directory and run:
cargo move-clippy
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.
- 2d ago Changed · +6 lines · +54 tokens per session a76d94c25ff7
- 8d ago Changed · -1 lines · -20 tokens per session 47baf7951af1
- 9d ago Changed · -1 lines · -11 tokens per session c4fc9147087e
- 27d ago Changed · +2 tokens per session ef7dd1076f23
- 1mo ago Changed · +24 lines · +369 tokens per session b8e3cfaf76c5
- 1mo ago First seen · 137 lines · 1,256 tokens per session scan A c8dec36552d3
sui CLAUDE.md is an instructions file published in the GitHub repository MystenLabs/sui (7,784 stars, last pushed today), licensed Apache-2.0. It adds 1,650 tokens to every session, about $0.0066 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.
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AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
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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.