Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/cxcscmu/skilllearnbench/excel-lookup-functionsnpx skills add cxcscmu/SkillLearnBench --skill excel-lookup-functionsgit clone --depth 1 https://github.com/cxcscmu/SkillLearnBenchWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/cxcscmu/skilllearnbench/excel-lookup-functions)<a href="https://agentmods.dev/skills/cxcscmu/skilllearnbench/excel-lookup-functions"><img src="https://agentmods.dev/badge/skills/cxcscmu/skilllearnbench/excel-lookup-functions.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00032 | $0.01025 |
| Opus 5 | $0.00016 | $0.00513 |
| Sonnet 5 | $0.00006 | $0.00205 |
| Haiku 4.5 | $0.00003 | $0.00103 |
Grade A, and why
excel-lookup-functions scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 136 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Excel Lookup Functions
Overview
Lookup functions allow you to find and retrieve data from tables based on criteria. Different functions suit different scenarios.
Function Comparison
VLOOKUP (Vertical Lookup)
Searches for a value in the first column of a range and returns a value in the same row from another column.
Syntax:
=VLOOKUP(lookup_value, table_array, col_index_num, [range_lookup])
Limitations:
- Can only search in the first column
- Lookup column must be to the left of return column
- Cannot handle multiple criteria easily
Example:
=VLOOKUP("Series_A", Data!A:D, 3, FALSE)
HLOOKUP (Horizontal Lookup)
Searches for a value in the first row of a range and returns a value in the same column from another row.
Syntax:
=HLOOKUP(lookup_value, table_array, row_index_num, [range_lookup])
Use Case: When data is organized horizontally with lookup values in the top row.
Example:
=HLOOKUP(2020, Data!A1:F10, 3, FALSE)
INDEX & MATCH (Flexible Lookup)
INDEX returns a value from a specific position in a range. MATCH finds the position of a value.
Syntax:
=INDEX(return_range, MATCH(lookup_value, lookup_range, 0))
Advantages:
- Works with data in any position
- Can be modified for multiple criteria
- More flexible than VLOOKUP
Example (Single Criterion):
=INDEX(Data!$C$1:$C$100, MATCH("Series_A", Data!$A$1:$A$100, 0))
Example (Multiple Criteria):
=INDEX(Data!$E$1:$E$100, MATCH(1, (Data!$A$1:$A$100=criteria1)*(Data!$B$1:$B$100=criteria2), 0))
Note: This requires Ctrl+Shift+Enter (array formula) in traditional Excel.
XLOOKUP (Modern Solution)
Available in Excel 365 and newer versions. Combines benefits of VLOOKUP and INDEX/MATCH.
Syntax:
=XLOOKUP(lookup_value, lookup_array, return_array, [if_not_found], [match_mode], [search_mode])
Advantages:
- Simpler syntax than INDEX/MATCH
- Can search left or right
- Built-in error handling
- Native support for multiple criteria
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 136 lines · 32 tokens per session scan A cc8ac7851a6a
excel-lookup-functions is a skill published in the GitHub repository cxcscmu/SkillLearnBench (83 stars, last pushed 1mo ago), licensed MIT. It adds 32 tokens to every session and 1,025 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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