architect-calculator

architect-calculator is a skill for Claude Code from Abhinavbwj/Skills-Architects. It costs 93 tokens per session (3,431 once invoked), scanned A, original, MIT.

A set of seven command-line Python calculators for common architectural design checks. They cover areas and density, thermal insulation, daylight, exits, and related design quantities, with optional JSON output.

In plain words
What is it for?
It is for estimating floor areas, units, population, parking, wall insulation, daylight, and exit-compliance values from project inputs.
Why use it?
It reduces repeated manual calculations and produces structured results that can also be used by other tools.

Skill for Claude Code

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

Part of the Skills-Architects plugin — 29 skills shipped together

Good fit It is for estimating floor areas, units, population, parking, wall insulation, daylight, and exit-compliance values from project inputs.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/abhinavbwj/skills-architects/architect-calculator
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 Abhinavbwj/Skills-Architects --skill architect-calculator
Clone the repo
git clone --depth 1 https://github.com/Abhinavbwj/Skills-Architects

Made for: Claude Code.

Or install Skills-Architects, the plugin that ships this one along with the rest of its 29 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 architect-calculator

README.md
[![agentmods](https://agentmods.dev/badge/skills/abhinavbwj/skills-architects/architect-calculator/github.svg)](https://agentmods.dev/skills/abhinavbwj/skills-architects/architect-calculator)
Your own site
<a href="https://agentmods.dev/skills/abhinavbwj/skills-architects/architect-calculator"><img src="https://agentmods.dev/badge/skills/abhinavbwj/skills-architects/architect-calculator/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 architect-calculator

Your own site · 80×15
<a href="https://agentmods.dev/skills/abhinavbwj/skills-architects/architect-calculator"><img src="https://agentmods.dev/badge/skills/abhinavbwj/skills-architects/architect-calculator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 93 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,431 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00093 $0.03431
Opus 5 $0.00046 $0.01716
Sonnet 5 $0.00019 $0.00686
Haiku 4.5 $0.00009 $0.00343

Measured 12d ago against content hash 873ca827e38b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

architect-calculator 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 12d ago.

The scan reads SKILL.md. This mod also ships 7 executable files (scripts/area_calculator.py, scripts/cost_calculator.py, scripts/daylight_calculator.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/architect-calculator/SKILL.md · 377 lines

How it starts

The opening of the file, as written. The whole thing — 377 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Architect Calculator

A suite of seven command-line Python calculators for rapid architectural design computations. Each calculator accepts parameters via command-line arguments, validates inputs, and produces either human-readable or JSON-structured output.

All scripts are located in the scripts/ directory and can be run with:

python scripts/<calculator_name>.py [arguments]

Add --json to any command for structured JSON output suitable for piping into other tools or automation workflows.


1. Area Calculator (area_calculator.py)

Calculates development density metrics from site area and floor area ratio (FAR), including gross floor area, net usable area, residential unit count, estimated population, and parking requirement.

Parameters

Parameter Flag Default Unit Description
Site Area --site-area Required m2 Total site/plot area
Floor Area Ratio --far Required ratio Permitted FAR / plot ratio
Net-to-Gross Ratio --ntg-ratio 0.80 ratio NGA as fraction of GFA (0.0-1.0)
Avg Unit Size --avg-unit-size 85 m2 Average residential unit area
Persons per Unit --persons-per-unit 2.5 persons Average household size
Parking Ratio --parking-ratio 1.0 spaces Parking spaces per dwelling unit

Example

python scripts/area_calculator.py --site-area 5000 --far 2.5 --ntg-ratio 0.82

Sample Output

=== Area & Density Calculator ===
Site Area:            5,000.00 m2
Floor Area Ratio:     2.50
---------------------------------------
Gross Floor Area:     12,500.00 m2
Net-to-Gross Ratio:   0.82
Net Gross Area:       10,250.00 m2
---------------------------------------
Average Unit Size:    85.00 m2
Estimated Units:      120
Persons per Unit:     2.50
Estimated Population: 300
---------------------------------------
Parking Ratio:        1.00 spaces/unit
Parking Spaces:       120

Read the full file on GitHub · 377 lines

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. 12d ago First seen · 377 lines · 93 tokens per session scan A 873ca827e38b

Subscribe to this mod's changes

architect-calculator is a skill published in the GitHub repository Abhinavbwj/Skills-Architects (285 stars, last pushed 3mo ago), licensed MIT. It adds 93 tokens to every session and 3,431 once invoked, about $0.0005 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 2026-08-30.

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