headline-filter-map-reduce SKILL.md skillA
headline-filter-map-reduce 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/headline-filter-map-reduce@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/headline-filter-map-reduce/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260919.33ae531, committed Sep 19, 2026
- Size
- 5,983 bytes
- Repository stars
- 436
- License
- MIT
Filter hundreds or thousands of headlines, search results or feed items against a written brief before opening any of them, using a two-stage cascade that spends a fast model on everything and a reasoning model only on the borderline band. Use when a monitoring run, feed sweep or search returns more items than are worth reading. Triggers on "which of these are relevant", "filter this feed", "go through these headlines", "anything here about X", "catch me up on".
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
# Filter a feed before you read it
Reading 500 headlines to keep 8 costs more context than the 8 are worth, and
fetching the articles costs more still. Classify the titles first: one call
labels every item against your brief and returns a calibrated confidence, so
you open only what survives.
`classifier.dev` is keyless and free. It never writes text — the summary at the
end of the run is still yours to write.
## When not to use it
Skip it under about 20 items, which you can judge for less than the round trip.
Skip it when relevance depends on the body rather than the title: classify a
snippet or first paragraph instead, or accept that a vague title is a coin flip.
It is not a search engine; it ranks what you already have.
## Step 1: one item per line
```python
import re, html, urllib.request
x = urllib.request.urlopen(urllib.request.Request(
"https://lobste.rs/rss", headers={"user-agent": "feedfilter/1.0"})).read().decode()
titles = [html.unescape(" ".join(t.split()))
for t in re.findall(r"<title>(?:<!\[CDATA\[)?(.*?)(?:\]\]>)?</title>", x, re.S)][1:]
open("headlines.txt", "w").write("\n".join(titles) + "\n")
```
…Read the whole file at its exact version.
How to install
mdr add mrmps/classifier-dev/headline-filter-map-reduce@sha256:415b93772c0b97dbThe 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_mhcleaczxetjd2dy)
3 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 (5983 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_mhcleaczxetjd2dy GET https://markdownregistry.com/api/v1/resolve?ref=mrmps/classifier-dev/headline-filter-map-reduce GET https://markdownregistry.com/api/v1/blob/415b93772c0b97db90778a7ae06f55a43c5ea95414ec5559e991eeaa47b21cd7
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.