model-and-skill-router SKILL.md skillA
model-and-skill-router from mrmps/classifier-dev is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add mrmps/classifier-dev/model-and-skill-router@git:20260919.33ae531Pins git:20260919.33ae531 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- mrmps/classifier-dev
- Path
skills/model-and-skill-router/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260919.33ae531, committed Sep 19, 2026
- Size
- 5,995 bytes
- Repository stars
- 436
- License
- MIT
Classify an incoming task by intent, difficulty and risk in three parallel calls to a keyless classifier, then route it to a cheap model, a strong model, a named skill or the user, from a routing table you maintain instead of a prompt. Use when deciding which model or skill should take a request, when someone says "route this", "which model should handle this" or "pick the right skill", or when a queue of tasks should not all get the same treatment.
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
# Route a task before you spend a model on it
Asking a strong model which model should answer costs a strong model call.
Three classifier calls run in parallel cost about 120ms and return numbers, so
the decision lives in a table you can read and correct rather than in a prompt
that drifts.
## Three questions
One question per call, each batching every waiting task: intent (six labels),
difficulty (an ordered rubric from 1 to 5) and risk (three labels), all set
out in the code below. `difficulty` and `risk` each need an `instructions`
line; `intent` does not. Keep `none of these` in the intent set: every call
returns one of your labels whether or not any fit.
## The router
```python
import json, sys, urllib.request
from concurrent.futures import ThreadPoolExecutor
INTENT = ["answer a question about existing code", "write or change code",
"find the cause of a failure", "operate infrastructure or data",
"research something outside the repository", "none of these"]
DIFFICULTY = ["1 mechanical", "2 easy", "3 moderate", "4 hard",
"5 needs deep reasoning"]
RISK = ["safe to do unattended", "the user should confirm first",
…Read the whole file at its exact version.
How to install
mdr add mrmps/classifier-dev/model-and-skill-router@sha256:584bc3c37aa67ec8The line at the top of this page pins the label git:20260919.33ae531, 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_yz75t6jmbthukzim)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 19, 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 (5995 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
mrmps/classifier-dev · 436 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_yz75t6jmbthukzim GET https://markdownregistry.com/api/v1/resolve?ref=mrmps/classifier-dev/model-and-skill-router GET https://markdownregistry.com/api/v1/blob/584bc3c37aa67ec8abfa76e9e81ed7680a05b01bb4e2beeac05024b48190d174
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.