matlab-use-duckdb

matlab-use-duckdb is a skill for Claude Code from matlab/matlab-agentic-toolkit. It costs 184 tokens per session (3,887 once invoked), scanned A, original, no licence file.

A MATLAB guide for using DuckDB, a small embedded database that can query files directly with SQL. It covers CSV, Parquet, and JSON data without requiring a separate database server.

In plain words
What is it for?
Use it to connect MATLAB to DuckDB, query file data with SQL, profile large datasets, and select only the data needed for analysis.
Why use it?
It helps reduce or inspect large tabular files before MATLAB loads them for analysis. This can make work with data files more manageable without setting up database infrastructure.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the reporting-and-database-access plugin — 4 skills shipped together

Good fit Use it to connect MATLAB to DuckDB, query file data with SQL, profile large datasets, and select only the data needed for analysis.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/matlab/matlab-agentic-toolkit/matlab-use-duckdb
Install

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.

Any agent
npx skills add matlab/matlab-agentic-toolkit --skill matlab-use-duckdb
Clone the repo
git clone --depth 1 https://github.com/matlab/matlab-agentic-toolkit

Made for: Claude Code.

Or install reporting-and-database-access, the plugin that ships this one along with the rest of its 4 skills.

Wrote 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.

agentmods badge for matlab-use-duckdb

README.md
[![agentmods](https://agentmods.dev/badge/skills/matlab/matlab-agentic-toolkit/matlab-use-duckdb/github.svg)](https://agentmods.dev/skills/matlab/matlab-agentic-toolkit/matlab-use-duckdb)
Your own site
<a href="https://agentmods.dev/skills/matlab/matlab-agentic-toolkit/matlab-use-duckdb"><img src="https://agentmods.dev/badge/skills/matlab/matlab-agentic-toolkit/matlab-use-duckdb/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for matlab-use-duckdb

Your own site · 80×15
<a href="https://agentmods.dev/skills/matlab/matlab-agentic-toolkit/matlab-use-duckdb"><img src="https://agentmods.dev/badge/skills/matlab/matlab-agentic-toolkit/matlab-use-duckdb.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 184 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,887 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00184 $0.03887
Opus 5.5 $0.00074 $0.01555
Sonnet 5.5 $0.00037 $0.00777
Haiku 4.5 $0.00018 $0.00389

Measured 1mo ago against content hash 86281963dd4b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

matlab-use-duckdb scanned grade A with 1 finding 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 1mo 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

3. **Recommend architectural changes** — Do not limit review to API correctness. Propose replacing `readtable`/`xlsread` + `sqlwrite` + query chains with `fetch(conn, "SELECT ... FROM read_csv/read_parquet/read_xlsx(...)
skills-catalog/reporting-and-database-access/matlab-use-duckdb/SKILL.md · 320 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

What ships with it

6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

  1. 1mo ago First seen · 320 lines · 184 tokens per session scan A 86281963dd4b

Subscribe to this mod's changes

matlab-use-duckdb is a skill published in the GitHub repository matlab/matlab-agentic-toolkit (1,179 stars, last pushed 5d ago), with no licence file. It adds 184 tokens to every session and 3,887 once invoked, about $0.0007 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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