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 skills add YoungjaeDev/my-claude-plugins --skill edit-notebookgit clone --depth 1 https://github.com/YoungjaeDev/my-claude-pluginsWrote 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/youngjaedev/my-claude-plugins/edit-notebook)<a href="https://agentmods.dev/skills/youngjaedev/my-claude-plugins/edit-notebook"><img src="https://agentmods.dev/badge/skills/youngjaedev/my-claude-plugins/edit-notebook/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.
<a href="https://agentmods.dev/skills/youngjaedev/my-claude-plugins/edit-notebook"><img src="https://agentmods.dev/badge/skills/youngjaedev/my-claude-plugins/edit-notebook.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00061 | $0.00499 |
| Opus 5.5 | $0.00024 | $0.00200 |
| Sonnet 5.5 | $0.00012 | $0.00100 |
| Haiku 4.5 | $0.00006 | $0.00050 |
Grade A, and why
edit-notebook 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 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.
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.
What it actually says
Notebook Editing
Edit Jupyter Notebook files through a structure-aware path, never as raw text.
Rules
Tool Selection
- .ipynb =
NotebookEdit(Claude Code) - Codex has no
NotebookEdittool; edit through a structure-aware path instead: a shortnbformatPython snippet (read → mutate cells → write), never raw text edits. Detect the interpreter first (python3→python→py -3; name-pinning breaks either macOS or Windows), check with<py> -c "import nbformat", and install on miss with the same interpreter:<py> -m pip install nbformat. A barepipcan target a different environment than the one checked; nbformat is not in the stdlib - Never use
Edit,Write, orBash(sed/cat)on.ipynb
Cell Insertion: cell_id Tracking (Required)
NotebookEdit returns inserted cell's id. Track it for sequential insertion:
NotebookEdit(edit_mode="insert", cell_type="code", new_source="...")
-> Returns cell_id='abc123'
NotebookEdit(edit_mode="insert", cell_id="abc123", cell_type="code", new_source="...")
-> Returns cell_id='def456'
NotebookEdit(edit_mode="insert", cell_id="def456", ...)
cell_id omitted: Cell inserted at BEGINNING -> reverse order bug
Execution Policy
- NotebookEdit = edit only, no execution
- After adding cells: "Please run the cells in Jupyter"
- Do NOT use mcp__ide__executeCode (causes notebook state corruption)
Post-Edit Verification
- Read first 30 lines to verify cell order
- Confirm existing outputs preserved
edit_mode Options
| Mode | Purpose | cell_id |
|---|---|---|
| replace | Update existing cell | Required |
| insert | Add new cell | Recommended (omit = top insertion) |
| delete | Remove cell | Required |
What ships with it
1 file 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.
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.
- 1mo ago First seen · 54 lines · 61 tokens per session scan A b5c8549ecb53
edit-notebook is a skill published in the GitHub repository YoungjaeDev/my-claude-plugins (2 stars, last pushed yesterday), licensed MIT. It adds 61 tokens to every session and 499 once invoked, about $0.0002 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 2026-09-05.
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