What is notebook.split_cells?

A notebook-cleanup procedure that makes each Jupyter notebook cell perform one logical task. Jupyter notebooks combine executable code, results, and explanatory text in an interactive document.

Use it to split cells, then synchronize the notebook with its paired Python file using Jupytext, a tool for keeping the two formats aligned.

It makes notebooks easier to read, run, and maintain by separating unrelated steps.

notebook.split_cells — Skill for Claude Code by gpsaggese/helpers

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 gpsaggese/helpers --skill notebook.split_cells

Clone the repo

git clone --depth 1 https://github.com/gpsaggese/helpers

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/gpsaggese/helpers/notebook.split_cells/github.svg)](https://agentmods.dev/skills/gpsaggese/helpers/notebook.split_cells)

Your own site

<a href="https://agentmods.dev/skills/gpsaggese/helpers/notebook.split_cells"><img src="https://agentmods.dev/badge/skills/gpsaggese/helpers/notebook.split_cells/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/gpsaggese/helpers/notebook.split_cells"><img src="https://agentmods.dev/badge/skills/gpsaggese/helpers/notebook.split_cells.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 13 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 190 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original 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.

Model	Per session	Once invoked
Fable 5.1	$0.00013	$0.00190
Opus 5.5	$0.00005	$0.00076
Sonnet 5.5	$0.00003	$0.00038
Haiku 4.5	$0.00001	$0.00019

Measured yesterday against content hash 375e9d498746, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

notebook.split_cells 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 yesterday.

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.

.claude/skills/notebook.split_cells/SKILL.md · 25 lines

What it actually says

Goal

Make sure that each code cell in a Jupyter notebook performs only one logical task

Conventions

Implement the rules in .claude/skills/notebook.rules.md under
- ## Single Responsibility Per Cell and
- ## Split Cells That Perform Distinct Steps

Workflow

Sync with Jupytext

At the end, sync the paired .py file with Jupytext following the conventions in # Code Architecture and Responsibility -> ## Utilities vs. Notebook Responsibilities in .claude/skills/notebook.rules.md

Verification

Confirm every code cell performs exactly one logical task
Confirm the .ipynb and paired .py file are in sync via Jupytext

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.

yesterday First seen · 25 lines · 13 tokens per session scan A 375e9d498746

Subscribe to this mod's changes

notebook.split_cells is a skill published in the GitHub repository gpsaggese/helpers (158 stars, last pushed today), licensed Apache-2.0. It adds 13 tokens to every session and 190 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-11-06.

Languages Python Scientific

notebook.split_cells next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
notebook.split_cellsgpsaggese/helpers	Skill	158	today	Apache-2.0	A	13	Claude Code
jupyter-notebookNousResearch/hermes-agent	Skill	261k	today	MIT	A	18	Claude Code, Codex
matlabK-Dense-AI/scientific-agent-skills	Skill	56k	5d ago	MIT	A	44	Claude Code
pennylaneK-Dense-AI/scientific-agent-skills	Skill	56k	5d ago	MIT	A	74	Claude Code
cuequivariance-jaxNVIDIA/skills	Skill	3.9k	today	Apache-2.0	A	38	Claude Code, Codex
cuequivariance-torchNVIDIA/skills	Skill	3.9k	today	Apache-2.0	A	37	Claude Code, Codex
cuopt-numerical-optimization-apiNVIDIA/skills	Skill	3.9k	today	Apache-2.0	A	51	Claude Code, Codex