sui-walrus

sui-walrus is a skill for Claude Code from widnyana/eyay-toolkits. It costs 97 tokens per session (5,652 once invoked), scanned B, original, MIT.

A TypeScript integration for Walrus, a decentralized storage network for public files, and Sui, the blockchain that coordinates storage payments and ownership. It covers storing blobs and hosting static websites through Walrus Sites.

In plain words
What is it for?
Use it to store files or website assets with the Walrus SDK, HTTP APIs, or command-line tool, and to deploy static sites through site-builder.
Why use it?
It explains how to upload and publish files while warning that Walrus data is public and should be encrypted first if sensitive.

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 Use it to store files or website assets with the Walrus SDK, HTTP APIs, or command-line tool, and to deploy static sites through site-builder.

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

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/widnyana/eyay-toolkits/sui-walrus"><img src="https://agentmods.dev/badge/skills/widnyana/eyay-toolkits/sui-walrus.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 97 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,652 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 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 $0.00097 $0.05652
Opus 5 $0.00048 $0.02826
Sonnet 5 $0.00019 $0.01130
Haiku 4.5 $0.00010 $0.00565

Measured 11d ago against content hash 5c437b3f9702, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade B, and why

sui-walrus scanned grade B with 2 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.

Sends data to an external URLmediumData exfiltration

A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.

curl -X PUT "$PUBLISHER/v1/blobs" -d "some string"

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -X PUT "$PUBLISHER/v1/blobs" -d "some string"
plugins/sui-dev-tools/skills/sui-walrus/SKILL.md · 506 lines

How it starts

The opening of the file, as written. The whole thing — 506 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Walrus Skill

Integrate Walrus — Mysten Labs' decentralized blob storage layer. Walrus stores immutable byte arrays ("blobs"); Sui handles coordination, payments, metadata, and object ownership. Storage is provided by erasure-coded slivers across ~1000 shards with Byzantine fault tolerance up to 1/3 malicious nodes. Follow these rules precisely.

Critical: All blobs on Walrus are public and discoverable by anyone. Deletion does not remove cached copies. If the data is sensitive, encrypt before uploading (see the sui-seal skill for the canonical pattern).


1. Mental model (read first)

A successful Walrus upload is three Sui transactions plus distributed storage work:

  1. Register the blob on Sui (reserve storage, mint a Blob object).
  2. Upload slivers (erasure-coded fragments) to ~2/3 of storage nodes — roughly 2200 HTTP requests direct.
  3. Certify availability on Sui once enough nodes have acknowledged — this is the "Point of Availability" (PoA).

Reading a blob is ~335 requests to reconstruct from slivers. These numbers are why most apps do not call storage nodes directly — they use one of:

  • Publishers / Aggregators (public or self-hosted HTTP gateways) — simplest; a single HTTP PUT/GET.
  • Upload relay — the SDK writes via one request to a relay that fans out to nodes. Recommended for browsers and mobile.
  • Direct SDK (@mysten/walrus) — full control; carries the request overhead. Best for backends with custom retry logic.

Blob identity and lifecycle:

  • Blobs are identified by a BlobId (content hash of the encoding). Identical content → identical BlobId → no duplicate storage cost.
  • Storage is per epoch. Testnet epoch = 1 day; Mainnet epoch = 2 weeks. Max 53 epochs per registration (~2 years on Mainnet).
  • A Blob object on Sui carries the BlobId plus ownership/deletability flags. Burn the object to reclaim a small SUI rebate; burning does not delete storage.
  • Max blob size: ~13.6 GiB. Max per-file inside a Quilt: ~4 GiB.
  • Memory: uploads need ~2–3× blob size in RAM via SDK/relay; raw direct uploads need ~4.5×. Reads need ~1.5–2× (erasure-coding overhead).

Read the full file on GitHub · 506 lines

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 506 lines · 97 tokens per session scan B 5c437b3f9702

Subscribe to this mod's changes

sui-walrus is a skill published in the GitHub repository widnyana/eyay-toolkits (7 stars, last pushed 8d ago), licensed MIT. It adds 97 tokens to every session and 5,652 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it B with 2 findings (sends data to an external url, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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