create-custom-grader SKILL.md skillA
create-custom-grader from nvidia/skillevaluator is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add nvidia/skillevaluator/create-custom-grader@git:20260805.fe1ea34Pins git:20260805.fe1ea34 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- nvidia/skillevaluator
- Path
src/skillevaluator/tier3/reference_skills/create-custom-grader/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260805.fe1ea34, committed Aug 5, 2026
- First version recorded
- Jul 26, 2026
- Size
- 8,587 bytes
- Repository stars
- 618
- License
- Apache-2.0
Use when converting an existing benchmark, rubric, verifier, task YAML/JSON, or domain check into SkillEvaluator BYOG/BYOT custom evaluation.
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
# Create Custom Grader Convert team-owned benchmark definitions into runnable SkillEvaluator custom graders and, when needed, native Harbor tasks. ## Purpose Help an agent author valid SkillEvaluator BYOG/BYOT files from a user's benchmark instead of leaving the user with empty grader templates. ## When To Use Use this skill when the user wants to: - bring an existing benchmark into SkillEvaluator - turn a rubric into `evals/grader.py` or `evals/grader.sh` - add custom metrics beside the default evaluator metrics - convert task files such as `task.yaml`, `task.json`, pytest checks, or shell verifiers into BYOG or BYOT - prove a team can run its own benchmark through SkillEvaluator Do not use this skill for ordinary `evals/evals.json` authoring when no custom grading logic is needed. Use the normal dataset authoring workflow for that. ## Instructions 1. Read the target skill, existing `evals/`, benchmark prompts, fixtures, and any verifier code. 2. Choose `default_plus_custom` when custom metrics should complement default evaluator scoring. 3. Choose `custom_only` only when the user wants the custom grader to own pass/fail semantics. …
Read the whole file at its exact version.
How to install
mdr add nvidia/skillevaluator/create-custom-grader@sha256:3fa1e016b4ea3fd7The line at the top of this page pins the label git:20260805.fe1ea34, 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_x5dy3ijfqwqx7cvh)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jul 26, 2026 and Aug 5, 2026, about one every 5 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260805.fe1ea34 latest | 2026-08-05 | fe1ea34 | 8,587 B | A | view · diff |
| git:20260801.fdf3ea4 | 2026-08-01 | fdf3ea4 | 8,241 B | A | view · diff |
| git:20260726.6a1bc57 | 2026-07-26 | 6a1bc57 | 8,242 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 (8587 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
nvidia/skillevaluator · 618 stars · license Apache-2.0 · pushed 2026-11-01 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_x5dy3ijfqwqx7cvh GET https://markdownregistry.com/api/v1/resolve?ref=nvidia/skillevaluator/create-custom-grader GET https://markdownregistry.com/api/v1/blob/3fa1e016b4ea3fd7adbf11d138eafaef3e2445bd23177e85373d6c30b0cd92d8
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.