shardnest: Instructions file for Codex

AGENTS.md

shardnest AGENTS.md is an instructions file for Codex, OpenCode from hua-hua3321/shardnest. It costs 1,819 tokens per session, scanned A, original, MIT.

Repository instructions for Shardnest, a self-hosted wallet service. They explain the project layout, setup commands, testing commands, type checking, and a command-line smoke test.

In plain words
What is it for?
They are for making and checking changes in the Shardnest codebase, a multi-package workspace whose packages share one repository.
Why use it?
They give a coding agent the project-specific rules needed to install dependencies, test individual packages or the whole workspace, and avoid using real wallet data during a smoke test.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions AGENTS.md.

This is hua-hua3321/shardnest's own configuration. It tells Codex and OpenCode how to work on shardnest 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 shardnest configures →

Reuse

Borrowing it

Nothing to install: this file belongs to hua-hua3321/shardnest. 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/hua-hua3321/shardnest/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/hua-hua3321/shardnest

Made for: Codex, OpenCode.

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.

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README.md
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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.

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Per session 1,819 This file is loaded in full into every session.
When invoked 1,819 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 $0.01819 $0.01819
Opus 5 $0.00910 $0.00910
Sonnet 5 $0.00364 $0.00364
Haiku 4.5 $0.00182 $0.00182

Measured 8d ago against content hash 33cab4de9f21, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

shardnest 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 8d 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.

AGENTS.md · 103 lines

How it starts

The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

This file provides guidance to Lingma (lingma.aliyun.com) when working with code in this repository.

项目概览

shardnest(钱包服务)——开源、自托管、非托管的钱包基础设施。用户本地部署 MCP server 管理密钥,平台零密钥材料。钱包密钥生成、Shamir 2-of-3 分片、签名、恢复全部在用户本地完成;任何符合 signed_request v1 协议的平台均可接入。完整设计见 docs/DES-016-self-custodial-wallet-service.md,安全模型见 docs/SECURITY.md

常用命令

# 安装依赖(workspace,改动任意 package.json 后必须执行)
bun install

# 单包测试(开发主循环)
cd packages/<pkg> && bun test

# 单个测试文件 / 单个用例
cd packages/<pkg> && bun test ./test/commands.test.ts
cd packages/<pkg> && bun test -t "用例名关键词"

# 全量测试(6 包:core signer cli verify-sdk protocol mcp-server)
for p in core signer cli verify-sdk protocol mcp-server; do (cd packages/$p && bun test); done

# 类型检查
bunx tsc --noEmit

# CLI 冒烟(临时目录隔离,不污染真实钱包)
SHARDNEST_HOME=$(mktemp -d) bun packages/cli/src/index.ts init

架构大图

包分层与依赖方向(严格单向)

core(纯密码学,无 IO)
  ├─ shamir.ts   GF(2^8) SSS(生成元 3 建表;split/combine/reshare)
  └─ keys.ts     CSPRNG 熵(根)、BIP-39/44 派生私钥、keccak 地址、EIP-55、scrypt KEK
  └─ mnemonic.ts 熵↔24 词标准编码(@scure/bip39)、seed、BIP-32 m/44'/60'/0'/0/0 派生
signvault.ts   WalletVault:注入已派生私钥→EIP-191 签名→wipe(O4A:组合/派生在命令层)n_message)
  └─ unlock-session.ts  令牌会话:unlock(私钥)/passphrase(口令)两型,
                         0600 加密落盘 + 5min TTL + rename 原子消费(单次)
cli(命令实现,MCP 的库 API 经 src/api.ts 的 exports 字段暴露)
  ├─ commands.ts  init/restore/sign/unlock/地址校验/恢复码 CRC(sn1-<idx>-<hex>-<crc>)
  ├─ mailer.ts    SMTP 备份分片(片③)发送(SHARDNEST_SMTP_* 环境变量)
  └─ index.ts     CLI 入口(掩码输入 promptSecret)
verify-sdk(平台侧验签,verify-only 零密钥)
protocol(signed_request v1:平台背书签发/钱包验签;canonicalBytes length-prefixed 二进制)
mcp-server(薄壳:凭证不进 LLM,6 工具 + 双闸门接线;独立无密钥进程为路线图 P0-3)

凭证隔离(本仓库最核心的安全架构,勿破坏)

口令与恢复码永不经 LLM 上下文。三条通道:

凭证 通道 机制
口令 passphrase_token CLI passphrase-token 本地输入 → unlock/passphrase-* 文件(0600/5min/单次)→ MCP 消费
恢复码输入 recovery_file_path 只传本地文件路径,内容由 MCP 进程从 recovery-codes.txt 读取
恢复码输出 recovery_codes_file MCP 响应只含文件路径 + 邮箱状态,绝不含明文

Read the full file on GitHub · 103 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. 8d ago First seen · 103 lines · 1,819 tokens per session scan A 33cab4de9f21

Subscribe to this mod's changes

shardnest AGENTS.md is an instructions file published in the GitHub repository hua-hua3321/shardnest (0 stars, last pushed 26d ago), licensed MIT. It adds 1,819 tokens to every session, about $0.0091 per session on Opus 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 2026-08-31.

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