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.
npx skills add tonbistudio/gitlana --skill onchain-skill-resolvergit clone --depth 1 https://github.com/tonbistudio/gitlanaWrote 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/skills/tonbistudio/gitlana/onchain-skill-resolver)<a href="https://agentmods.dev/skills/tonbistudio/gitlana/onchain-skill-resolver"><img src="https://agentmods.dev/badge/skills/tonbistudio/gitlana/onchain-skill-resolver/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/skills/tonbistudio/gitlana/onchain-skill-resolver"><img src="https://agentmods.dev/badge/skills/tonbistudio/gitlana/onchain-skill-resolver.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 | $0.00033 | $0.01067 |
| Opus 5 | $0.00016 | $0.00534 |
| Sonnet 5 | $0.00007 | $0.00213 |
| Haiku 4.5 | $0.00003 | $0.00107 |
Grade A, and why
onchain-skill-resolver 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.
How it starts
The opening of the file, as written. The whole thing — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.
On-Chain Skill Resolver
This skill teaches an agent how to retrieve another agent skill whose source code lives entirely in Solana account state, addressed by a single Metaplex Core asset address. No GitHub, no Arweave, no IPFS, no indexer — one RPC call returns the code.
When to use
Use this skill when the user gives you a Solana address and says it is an on-chain skill, package, or repository (e.g. "install the skill at "), or when a manifest you are reading refers to a dependency by a Solana asset address.
How on-chain skills are stored
An on-chain skill is a Metaplex Core asset with two relevant plugins:
- Attributes plugin — an on-chain key-value manifest:
standard: alwaysonchain-skill/0.1version: semver stringcontent_sha256: hex digest of the compressed archive bytesencoding:tar+gzipentrypoint: path inside the archive, normallySKILL.mdlicense: SPDX identifierpermissions: comma-separated capability list; empty means read-only
- AppData plugin (binary schema) — the deterministic
tar.gzarchive of the skill directory itself.
The asset's update authority is the maintainer. If the AppData data authority has been revoked, the skill is immutable: the bytes you fetch today are the bytes everyone fetches forever.
Retrieval procedure
- Call
getAccountInfo(assetAddress, { encoding: "base64" })against any Solana RPC endpoint for the cluster in question. - Deserialize the Core asset. Read the Attributes plugin into a manifest object.
Reject the asset if
standardis notonchain-skill/0.1. - Locate the AppData section for the expected data authority and extract its raw bytes.
- Compute SHA-256 over those bytes. If the digest does not equal
content_sha256, STOP. Do not decompress, do not install, and report the mismatch to the user. - Decompress the archive into a temporary directory. Refuse archives containing
absolute paths,
..traversal segments, symlinks, or hardlinks. - Read the
entrypointfile and present the skill's name, version, license, declared permissions, file list, and total size to the user. - Install into the agent's skill directory only after the user confirms.
What ships with it
1 file 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.
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.
- 8d ago First seen · 101 lines · 33 tokens per session scan A 64688b98fd64
onchain-skill-resolver is a skill published in the GitHub repository tonbistudio/gitlana (4 stars, last pushed 1mo ago), licensed MIT. It adds 33 tokens to every session and 1,067 once invoked, about $0.0002 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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