checkpoint SKILL.md skillA
checkpoint from jovesun-lab/arcgram is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jovesun-lab/arcgram/checkpoint@git:20260720.f85faffPins git:20260720.f85faff in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jovesun-lab/arcgram
- Path
skills/checkpoint/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260720.f85faff, committed Jul 20, 2026
- Size
- 3,454 bytes
- Repository stars
- 13
- License
- Apache-2.0
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).
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
# Checkpoint - Arcgram logic self-check validator One input: a **diagram** (treated as a spec). One question: **is the flow logic well-formed and coherent?** Returns typed findings; marks, never blocks. Sibling to Reconcile: Checkpoint checks **structure** from the diagram alone; Reconcile checks **values** across diagram + code. Run both -> the diagram is a faithful, current spec. It checks the graph's logic structure - **not** drawing quality (the engine auto-handles overlaps/spacing/routing) and **not** semantic correctness (whether the logic is *right* - a human call). **Red line:** reads only the semantic field values `id`, `f`, `t`, `kind`, `role`, `type` (plus optional `status`, `flag`). Never a coordinate, color, size, or spacing. The judge: am I reading a semantic string, or a rendered visual quantity? ## Findings **Tier A - structural integrity (always on).** Domain-agnostic graph theory. | finding | means | |---|---| | `dangling-edge` | an edge points at an id that is not a node | | `orphan-node` | a node has no edge (chain broken) - except a declared `type:'open'` | | `missing-branch` | a decision (`kind:'diamond'`) lacks its Y or N branch | …
Read the whole file at its exact version.
How to install
mdr add jovesun-lab/arcgram/checkpoint@sha256:9609bb1f6dff92baThe line at the top of this page pins the label git:20260720.f85faff, 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_vfcl2hgdb7jht6ly)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 20, 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 (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
jovesun-lab/arcgram · 13 stars · license Apache-2.0 · pushed 2026-10-16 · 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
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.
More from jovesun-lab/arcgram
Every file in jovesun-lab/arcgram