excel-index-match SKILL.md skillA
excel-index-match from cxcscmu/skilllearnbench is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add cxcscmu/skilllearnbench/excel-index-match@git:20260424.d50cf5aPins git:20260424.d50cf5a in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- cxcscmu/skilllearnbench
- Path
skills/b1-one-shot-claude-sonnet-4-6/weighted-gdp-calculation/excel-index-match/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260424.d50cf5a, committed Apr 24, 2026
- Size
- 2,767 bytes
- Repository stars
- 91
- License
- MIT
Using INDEX&MATCH (single and dual condition) for dynamic lookups across rows and columns in Excel, including cross-sheet references.
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
# INDEX & MATCH for Two-Condition Lookups
## Overview
INDEX&MATCH is preferred over VLOOKUP/HLOOKUP because it allows:
- Lookups by both row AND column simultaneously
- Lookups in any direction (not just left-to-right)
- Cross-sheet references with ease
## Basic Syntax
```excel
=INDEX(data_range, MATCH(row_key, row_lookup_range, 0), MATCH(col_key, col_lookup_range, 0))
```
## Two-Dimensional Lookup Pattern
When you need to find a value based on BOTH a row label (e.g., series code) and a column label (e.g., year):
```excel
=INDEX(Data!$H$21:$M$40,
MATCH($D12, Data!$B$21:$B$40, 0),
MATCH(H$10, Data!$H$4:$M$4, 0))
```
**Explanation:**
- `Data!$H$21:$M$40` — the value table (rows = series, cols = years)
- `MATCH($D12, Data!$B$21:$B$40, 0)` — find the ROW where D12's series code appears in column B
- `MATCH(H$10, Data!$H$4:$M$4, 0)` — find the COLUMN where H10's year appears in row 4
- `0` = exact match
## Dollar Sign Anchoring for Drag-Copying
Use mixed references so formulas can be dragged across rows and columns:
```excel
=INDEX(Data!$H$21:$M$40, MATCH($D12, Data!$B$21:$B$40, 0), MATCH(H$10, Data!$H$4:$M$4, 0))
```
…Read the whole file at its exact version.
How to install
mdr add cxcscmu/skilllearnbench/excel-index-match@sha256:480118d83aed570fThe line at the top of this page pins the label git:20260424.d50cf5a, 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_vtiomfudjomble5k)
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Versions
The registry has recorded 1 version of this file, committed on Apr 24, 2026.
Audit of the latest version
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- pass: No instruction to send local credentials anywhere
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Source
cxcscmu/skilllearnbench · 91 stars · license MIT · pushed 2026-10-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_vtiomfudjomble5k GET https://markdownregistry.com/api/v1/resolve?ref=cxcscmu/skilllearnbench/excel-index-match GET https://markdownregistry.com/api/v1/blob/480118d83aed570f30cfb75ab8c136c64b874b024e1fe81c9a42deb538540af1
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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