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complex-excel-builder

complex-excel-builder is a skill for Claude Code, Codex from Exploration-labs/Nates-Substack-Skills. It costs 85 tokens per session (6,713 once invoked), scanned A, original, no licence file.

A toolkit for building Excel workbooks with multiple sheets, organized data, calculations, pivot tables, charts, and documentation.

In plain words
What is it for?
Use it to create financial models, operational dashboards, board reports, or analytics workbooks for startups and growing companies.
Why use it?
It helps keep financial, operational, and analytics workbooks structured when they contain many related tables and calculations.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

not rated 55repo 1y ago A scan 85 tokens no licence

Good fit Use it to create financial models, operational dashboards, board reports, or analytics workbooks for startups and growing companies.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/exploration-labs/nates-substack-skills/complex-excel-builder
View source ↗ Exploration-labs/Nates-Substack-Skills
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 Exploration-labs/Nates-Substack-Skills --skill complex-excel-builder
Clone the repo
git clone --depth 1 https://github.com/Exploration-labs/Nates-Substack-Skills

Made for: Claude Code, Codex.

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 complex-excel-builder

README.md
[![agentmods](https://agentmods.dev/badge/skills/exploration-labs/nates-substack-skills/complex-excel-builder/github.svg)](https://agentmods.dev/skills/exploration-labs/nates-substack-skills/complex-excel-builder)
Your own site
<a href="https://agentmods.dev/skills/exploration-labs/nates-substack-skills/complex-excel-builder"><img src="https://agentmods.dev/badge/skills/exploration-labs/nates-substack-skills/complex-excel-builder/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 complex-excel-builder

Your own site · 80×15
<a href="https://agentmods.dev/skills/exploration-labs/nates-substack-skills/complex-excel-builder"><img src="https://agentmods.dev/badge/skills/exploration-labs/nates-substack-skills/complex-excel-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 85 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,713 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 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 $0.00085 $0.06713
Opus 5.5 $0.00034 $0.02685
Sonnet 5.5 $0.00017 $0.01343
Haiku 4.5 $0.00009 $0.00671

Measured 2mo ago against content hash c86d14deb113, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

complex-excel-builder 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 2mo 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.

complex-excel-builder/SKILL.md · 820 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

3 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. 2mo ago First seen · 820 lines · 85 tokens per session scan A c86d14deb113

Subscribe to this mod's changes

complex-excel-builder is a skill published in the GitHub repository Exploration-labs/Nates-Substack-Skills (55 stars, last pushed 1y ago), with no licence file. It adds 85 tokens to every session and 6,713 once invoked, about $0.0003 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 2026-08-30.

Analytics and metricsDocumentsSpreadsheets
Related

complex-excel-builder compared with skills from other repositories

complex-excel-builder next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
complex-excel-builderExploration-labs/Nates-Substack-SkillsSkill551y agononeA85Claude Code, Codex
dcf-modelNousResearch/hermes-agentSkill262ktodayMITA14Claude Code, Codex
gogopenclaw/openclawSkill394ktodayMITA20Claude Code, Codex
xlsxasgeirtj/system_prompts_leaksSkill71kyesterdayCC0-1.0A206Claude Code, Codex
audit-xlsanthropics/financial-servicesSkill41k12d agoApache-2.0A104Claude Code
artifact-template-analytics-dashboardasgeirtj/system_prompts_leaksSkill71kyesterdayCC0-1.0A47Claude Code, Codex
google-drive-sheetsyc-software/qmSkill16ktodayMITA32Claude Code, Codex