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ai-rag-patterns SKILL.md skillA

ai-rag-patterns from muvon/octomind-tap is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add muvon/octomind-tap/ai-rag-patterns@git:20261013.a69e0bb

Pins git:20261013.a69e0bb in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: muvon/octomind-tap
Path: skills/ai-rag-patterns/SKILL.md
Versions recorded: 2
Latest version: git:20261013.a69e0bb, committed Oct 13, 2026
First version recorded: May 21, 2026
Size: 16,067 bytes
Repository stars: 6
License: Apache-2.0

Operational playbook for designing and tuning production RAG (Retrieval-Augmented Generation) systems in 2026. Covers chunking strategies (fixed/recursive, semantic, late chunking, Anthropic Contextual Retrieval), retrieval (BM25, dense, hybrid with reciprocal rank fusion, ColBERT late-interaction), query rewriting (HyDE, multi-query, decomposition), reranking (Cohere Rerank 4, cross-encoders, BGE-Reranker), evaluation (RAGAS metrics, TruLens RAG Triad, DeepEval), the seven failure modes…

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

## Overview

Production RAG in 2026 is no longer "embed, retrieve top-5, generate." Three measurable shifts changed the playbook: hybrid retrieval beating either BM25 or dense alone, reranking moving from optional to default, and Anthropic's Contextual Retrieval (September 2024) collapsing retrieval-failure rates dramatically. This skill encodes the patterns that actually move the metrics, with cited numbers and the failure modes they address.

Use this skill when designing a new RAG pipeline, diagnosing why an existing one underperforms, or evaluating retrieval quality before generation. Skip it for a small, stable corpus (under ~200K tokens) where putting everything in a cached prompt is the cheaper answer — see §6.

## Mental model
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add muvon/octomind-tap/ai-rag-patterns@sha256:a3936e4d57285f72

The line at the top of this page pins the label git:20261013.a69e0bb, 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.

Badge

[![mdr](https://markdownregistry.com/badge/art_mrq54tpf5tcmbyn4.svg)](https://markdownregistry.com/a/art_mrq54tpf5tcmbyn4)

4 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 2 versions of this file, between May 21, 2026 and Oct 13, 2026, about one every 145 days.

version	committed	commit	size	audit
git:20261013.a69e0bb latest	2026-10-13	a69e0bb	16,067 B	A	view · diff
git:20260521.845154d	2026-05-21	845154d	15,144 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (16067 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

GitHub

muvon/octomind-tap · 6 stars · license Apache-2.0 · pushed 2026-11-08 · branch master

API

GET https://markdownregistry.com/api/v1/artifacts/art_mrq54tpf5tcmbyn4
GET https://markdownregistry.com/api/v1/resolve?ref=muvon/octomind-tap/ai-rag-patterns
GET https://markdownregistry.com/api/v1/blob/a3936e4d57285f72c3292470b334eac18881a2c21cd5410d80f913a124cc9d58

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.

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