jovesun-lab/arcgram · skills/checkpoint/SKILL.md

checkpoint skillA

checkpoint is agent-read markdown (skill) from jovesun-lab/arcgram: Validate an Arcgram diagram as a logic spec: is the flow well-formed and coherent? Reads node/edge structure (id/f/t/kind/role/type), never geometry. Typed findings - dangling edge, orphan node, missing branch, disconnected island, duplicate id, missing schema, plus optional coherence (every action traces to a goal). Marks, never blocks. Run after authoring or editing a diagram. Agent-neutral. Sibling to Reconcile (Checkpoint = structure; Reconcile = values)..

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 jovesun-lab/arcgram/checkpoint@git:20260720.f85faff
Exact content
mdr add jovesun-lab/arcgram/checkpoint@sha256:9609bb1f6dff92ba

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_vfcl2hgdb7jht6ly.svg)](https://markdownregistry.com/a/art_vfcl2hgdb7jht6ly)

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Versions

versioncommittedcommitsizeaudit
git:20260720.f85faff latest2026-07-20 f85faff 3,454 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 (3454 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

jovesun-lab/arcgram · 11 stars · license Apache-2.0 · pushed 2026-09-18 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_vfcl2hgdb7jht6ly
GET https://markdownregistry.com/api/v1/resolve?ref=jovesun-lab/arcgram/checkpoint
GET https://markdownregistry.com/api/v1/blob/9609bb1f6dff92ba446d51fe0e594dcdfc1dbbf59a2015403bdf73f639e70967

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