sui-seal

sui-seal is a skill for Claude Code from widnyana/eyay-toolkits. It costs 85 tokens per session (4,945 once invoked), scanned A, original, MIT.

Instructions for using Seal, a Sui service that encrypts data and releases decryption only when on-chain rules written in Move allow it.

In plain words
What is it for?
It guides Move access checks and TypeScript encryption and decryption for data stored on Walrus, Sui objects, or other storage.
Why use it?
It helps developers control who can decrypt stored data without keeping the decryption key in one place.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the sui-dev-tools plugin — 11 skills shipped together

Good fit It guides Move access checks and TypeScript encryption and decryption for data stored on Walrus, Sui objects, or other storage.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/widnyana/eyay-toolkits/sui-seal
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add widnyana/eyay-toolkits --skill sui-seal
Clone the repo
git clone --depth 1 https://github.com/widnyana/eyay-toolkits

Made for: Claude Code.

Or install sui-dev-tools, the plugin that ships this one along with the rest of its 11 skills.

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 sui-seal

README.md
[![agentmods](https://agentmods.dev/badge/skills/widnyana/eyay-toolkits/sui-seal/github.svg)](https://agentmods.dev/skills/widnyana/eyay-toolkits/sui-seal)
Your own site
<a href="https://agentmods.dev/skills/widnyana/eyay-toolkits/sui-seal"><img src="https://agentmods.dev/badge/skills/widnyana/eyay-toolkits/sui-seal/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 sui-seal

Your own site · 80×15
<a href="https://agentmods.dev/skills/widnyana/eyay-toolkits/sui-seal"><img src="https://agentmods.dev/badge/skills/widnyana/eyay-toolkits/sui-seal.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 85 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,945 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00085 $0.04945
Opus 5 $0.00043 $0.02472
Sonnet 5 $0.00017 $0.00989
Haiku 4.5 $0.00009 $0.00494

Measured 11d ago against content hash dc753b637582, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

sui-seal 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 11d 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.

plugins/sui-dev-tools/skills/sui-seal/SKILL.md · 381 lines

How it starts

The opening of the file, as written. The whole thing — 381 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Seal Skill

Integrate Seal — Mysten Labs' decentralized secrets management service. Seal encrypts data client-side with identity-based encryption (IBE) and delegates decryption-key release to a threshold of off-chain key servers that evaluate onchain access policies written in Move. Storage is orthogonal: ciphertext lives wherever needed (Walrus, Sui objects, S3). Follow these rules precisely.

Not for: wallet private keys, regulated PHI, classified/government secrets. Seal's trust model assumes t-of-n key servers are honest — it is not suitable when a single compromised server must never leak plaintext. See the Security section.

This skill covers both sides of a Seal integration: the Move package that defines who can decrypt, and the TypeScript SDK that performs encryption and decryption.


1. Mental model (read first)

Seal is not "encrypt with a key and store the key somewhere." The flow is:

  1. The Move package defines one or more seal_approve* entry functions. Each takes an identity id: vector<u8> plus any objects it needs, and aborts if access is denied.
  2. Encrypt data client-side against a chosen identity id and a set of key servers with a threshold t. The SDK produces ciphertext and a symmetric key.
  3. To decrypt, the client builds a PTB that calls the seal_approve* function and asks t key servers to release a derived decryption key. Each key server dry-runs the PTB on a full node; if the function does not abort, the server returns its share.
  4. The client reconstructs the decryption key from t shares and decrypts locally.

Key consequences:

  • Access policy changes take effect immediately for future decryptions — no re-encryption needed. Just edit the Move package (or the on-chain state it reads).
  • seal_approve* is evaluated via dry_run_transaction_block on a full node. It must be side-effect free, cannot use Random, and must not rely on just-created objects (propagation delay).
  • The identity namespace is scoped by package ID: Seal prepends the full package ID to every key-id, so packages cannot forge each other's identities. Within the package, design the rest of the id bytes.
  • Once a user has fetched a decryption key, it cannot be revoked — the key is a cryptographic object held locally by the user. Plan access-control changes around this.

Read the full file on GitHub · 381 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. 11d ago First seen · 381 lines · 85 tokens per session scan A dc753b637582

Subscribe to this mod's changes

sui-seal is a skill published in the GitHub repository widnyana/eyay-toolkits (7 stars, last pushed 8d ago), licensed MIT. It adds 85 tokens to every session and 4,945 once invoked, about $0.0004 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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