schema-check SKILL.md skillA
schema-check from runxhq/runx is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add runxhq/runx/schema-check@git:20261023.420f372Pins git:20261023.420f372 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- runxhq/runx
- Path
skills/schema-check/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261023.420f372, committed Oct 23, 2026
- First version recorded
- Oct 17, 2026
- Size
- 3,458 bytes
- Repository stars
- 104
- License
- Apache-2.0
Check a proposed API or data contract against the current contract, real sample payloads, and a compatibility policy, and gate publication behind a refusable verdict with native digest evidence.
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
# Schema Check Schema Check decides whether a proposed contract change can move forward without silently breaking callers. It compares the current and proposed JSON Schema contracts field by field, validates every supplied sample payload against the proposed contract, applies the caller's compatibility policy, and either refuses or emits a gated publish proposal. It never publishes anything itself. ## Procedure 1. Native `data.digest` binds the exact current schema, proposed schema, and sample set before any judgment, so the verdict is tied to specific bytes. 2. Deterministic comparison walks both contracts: removed fields, type changes, fields that became required, new required fields, and narrowed enums are breaking; additive optional fields and expanded enums are notes. 3. Native `data.validate` compiles both schemas and validates every sample against each contract using JSON Schema 2020-12, with external retrieval disabled. Coverage is reported honestly: paths no sample exercises are flagged, not assumed covered. 4. The policy decides the verdict. Breaking changes are refused unless …
Read the whole file at its exact version.
How to install
mdr add runxhq/runx/schema-check@sha256:a56e8663add5be22The line at the top of this page pins the label git:20261023.420f372, 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_fbbiwab23dbvl772)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Oct 17, 2026 and Oct 23, 2026, about one every 5 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261023.420f372 latest | 2026-10-23 | 420f372 | 3,458 B | A | view · diff |
| git:20261017.16ba3f9 | 2026-10-17 | 16ba3f9 | 3,452 B | A | view |
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 (3458 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
runxhq/runx · 104 stars · license Apache-2.0 · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_fbbiwab23dbvl772 GET https://markdownregistry.com/api/v1/resolve?ref=runxhq/runx/schema-check GET https://markdownregistry.com/api/v1/blob/a56e8663add5be22f5eabaf9fe99c47b4af064d51b89d5a2f1d400531052e9d9
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.