recommendation-algorithm-design SKILL.md skillA
recommendation-algorithm-design from nirholas/three.ws is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add nirholas/three.ws/recommendation-algorithm-design@git:20260501.87cefc9Pins git:20260501.87cefc9 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- nirholas/three.ws
- Path
data/skills/development/recommendation-algorithm-design/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260501.87cefc9, committed May 1, 2026
- Size
- 21,636 bytes
- Repository stars
- 269
- License
- Apache-2.0
Complete mastery guide for designing social media recommendation algorithms — understanding candidate generation, ranking models, engagement prediction, content graph modeling, collaborative filtering, embedding spaces, real-time personalization, exploration vs exploitation tradeoffs, feedback loops, filter bubble mitigation, and building recommendation systems from scratch. Based on analysis of production systems like Twitter/X's open-source algorithm, with applications to crypto community…
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
# Recommendation Algorithm Design — From First Principles This skill teaches you to build recommendation systems that surface the right content to the right person at the right time. You'll learn the full pipeline — from candidate generation to final ranking — and understand why feeds feel the way they do. ## The Recommendation Pipeline Every major social platform follows the same high-level architecture: ``` ┌─────────────────────────────────────────────────────────────┐ │ THE RECOMMENDATION PIPELINE │ ├─────────────────────────────────────────────────────────────┤ │ │ │ ALL CONTENT (millions) │ │ │ │ │ ▼ │ │ ┌─────────────┐ │ │ │ CANDIDATE │ Filter: ~10,000 posts worth considering │ │ │ GENERATION │ (follows, topics, graph neighbors) │ │ └──────┬──────┘ │ │ │ │ …
Read the whole file at its exact version.
How to install
mdr add nirholas/three.ws/recommendation-algorithm-design@sha256:d02f10d9edbe8055The line at the top of this page pins the label git:20260501.87cefc9, 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_efg5ngjtl5muhgwd)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on May 1, 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 (21636 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
nirholas/three.ws · 269 stars · license Apache-2.0 · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_efg5ngjtl5muhgwd GET https://markdownregistry.com/api/v1/resolve?ref=nirholas/three.ws/recommendation-algorithm-design GET https://markdownregistry.com/api/v1/blob/d02f10d9edbe805537ac1e62b6c5ec1c84ed662643d2a7e1dfb23a5205d9ccfa
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.