ean-upc-gtin SKILL.md skillA
ean-upc-gtin from nebutra/nebutra-sailor is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add nebutra/nebutra-sailor/ean-upc-gtin@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- nebutra/nebutra-sailor
- Path
packages/ai/forge-runtime/skills/ean-upc-gtin/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0.0, committed Aug 27, 2026
- Size
- 1,352 bytes
- Repository stars
- 5
- License
- Apache-2.0
Validate or calculate the GS1 check digit in bulk: GTIN-8/12/13/14, SSCC-18, GLN-13.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
## What this skill does
Validate or calculate the GS1 check digit in bulk: GTIN-8/12/13/14, SSCC-18, GLN-13
中文：批量校验或计算 GS1 标准校验位：GTIN-8/12/13/14、SSCC-18、GLN-13
## When to use
- Human or agent needs **EAN / UPC / GTIN Check Digit** (`life/ean-upc-gtin`).
- Tier: `core` · side-effect: `pure` · meter: `forge.life.ean_upc_gtin`.
## How to invoke
```http
POST /api/v1/tools/invoke/life/ean-upc-gtin
Content-Type: application/json
{"input":{}}
```
MCP name: `life__ean-upc-gtin`
## Engine
- **gs1-mod10** 1.0.0
- Upstream: GS1 General Specifications — standard check digit calculation for GS1 data structures (mod 10, 3/1 weighting anchored at the rightmost payload digit), applied to GTIN-8/12/13/14, SSCC and GLN
## Composition (next)
Chain these after a successful run when the job continues:
- (none seeded yet)
## Batch
This tool supports the Processor batch surface (`resultKind=json`, accept=`lines`).
- MCP: `forge.batch.create` with `toolId: "life/ean-upc-gtin"`
- Poll: `forge.batch.get`
## Limits
- Prefer pure/deterministic path; do not invent model calls.
- Respect input schema validation errors from invoke.Read the whole file at its exact version.
How to install
mdr add nebutra/nebutra-sailor/ean-upc-gtin@sha256:ade8bfba8c6b5987The line at the top of this page pins the label v1.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_mxm4j4oqoqt7avvi)
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Versions
The registry has recorded 1 version of this file, committed on Aug 27, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (1352 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
nebutra/nebutra-sailor · 5 stars · license Apache-2.0 · pushed 2026-10-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_mxm4j4oqoqt7avvi GET https://markdownregistry.com/api/v1/resolve?ref=nebutra/nebutra-sailor/ean-upc-gtin GET https://markdownregistry.com/api/v1/blob/ade8bfba8c6b598766970050f84169d7ff14e8d057efbc71ba9aebd777c10229
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.