yarlson/yarstack · plugins/yarstack/skills/spec-update/SKILL.md

spec-update skillA

spec-update is agent-read markdown (skill) from yarlson/yarstack: Make a minimal evidence-backed update to a non-plan product, architecture, API, schema, or behavior contract. Use when implementation or validation cannot determine correctness from the current authoritative contract..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add yarlson/yarstack/spec-update@git:20260718.188cd11
Exact content
mdr add yarlson/yarstack/spec-update@sha256:5cd3e41ea2ae6e72

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_m5z4vtu6hbntqmtl.svg)](https://markdownregistry.com/a/art_m5z4vtu6hbntqmtl)

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Versions

versioncommittedcommitsizeaudit
git:20260718.188cd11 latest2026-07-18 188cd11 1,391 BA view · diff
git:20260717.dc9a72d2026-07-17 dc9a72d 1,194 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (1391 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

GitHub

yarlson/yarstack · 3 stars · license MIT · pushed 2026-09-12 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_m5z4vtu6hbntqmtl
GET https://markdownregistry.com/api/v1/resolve?ref=yarlson/yarstack/spec-update
GET https://markdownregistry.com/api/v1/blob/5cd3e41ea2ae6e7251316de52e2b6407968104b47f4e9b9aa2f09897fac5bd2d

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.