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-opus-4-6/weighted-gdp-calculation/excel-index-match/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260424.d50cf5a, committed Apr 24, 2026
- Size
- 1,169 bytes
- Repository stars
- 91
- License
- MIT
Using INDEX/MATCH formulas in Excel for two-condition lookups across sheets.
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 in Excel ## Pattern: Cross-Sheet Lookup with Two Criteria When you need to look up a value using both a row identifier and a column identifier (e.g., series code + year), use INDEX/MATCH: ``` =INDEX(DataRange, MATCH(RowCriteria, RowLookupRange, 0), MATCH(ColCriteria, ColLookupRange, 0)) ``` ### Example Given a Data sheet with series codes in column B and years in row 4: ``` =INDEX(Data!$H$21:$M$40, MATCH($D12, Data!$B$21:$B$40, 0), MATCH(H$9, Data!$H$4:$M$4, 0)) ``` ### Key Points - Use `$` to lock ranges that shouldn't shift when copying formulas - Lock row criteria column with `$D12` (column locked, row relative) - Lock year row with `H$9` (column relative, row locked) - The third argument `0` means exact match - INDEX range and MATCH ranges must align (same rows/columns) ### Openpyxl Implementation ```python # When writing INDEX/MATCH formulas via openpyxl, use string assignment: ws['H12'] = '=INDEX(Data!$H$21:$M$40,MATCH($D12,Data!$B$21:$B$40,0),MATCH(H$9,Data!$H$4:$M$4,0))' ```
Read the whole file at its exact version.
How to install
mdr add cxcscmu/skilllearnbench/excel-index-match@sha256:18b0cc68ff6b7da0The 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_nahnkaox5ie6lrha)
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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 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
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- pass: No link to a raw IP address
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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_nahnkaox5ie6lrha GET https://markdownregistry.com/api/v1/resolve?ref=cxcscmu/skilllearnbench/excel-index-match GET https://markdownregistry.com/api/v1/blob/18b0cc68ff6b7da0d135bcb713d4667bb59bca2bfa5470255fd64d75098cc237
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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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