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 Abhinavbwj/Urban-Design-Skills-Claude --skill cost-estimationgit clone --depth 1 https://github.com/Abhinavbwj/Urban-Design-Skills-ClaudeWrote 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/abhinavbwj/urban-design-skills-claude/cost-estimation)<a href="https://agentmods.dev/skills/abhinavbwj/urban-design-skills-claude/cost-estimation"><img src="https://agentmods.dev/badge/skills/abhinavbwj/urban-design-skills-claude/cost-estimation/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/abhinavbwj/urban-design-skills-claude/cost-estimation"><img src="https://agentmods.dev/badge/skills/abhinavbwj/urban-design-skills-claude/cost-estimation.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 | $0.00141 | $0.06034 |
| Opus 5 | $0.00071 | $0.03017 |
| Sonnet 5 | $0.00028 | $0.01207 |
| Haiku 4.5 | $0.00014 | $0.00603 |
Grade A, and why
cost-estimation 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.
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.
How it starts
The opening of the file, as written. The whole thing — 504 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cost Estimation Skill
This skill provides a systematic framework for estimating the capital costs of urban design projects at the masterplan and district scales. It draws on international construction cost benchmarks (Turner & Townsend, Rider Levett Bucknall, AECOM, Arcadis), infrastructure costing guides (CIRIA, ASCE), and development appraisal methodology (RICS Red Book, ULI).
All costs are provided in USD (2025 baseline) with regional adjustment factors. The goal is to enable early-stage cost estimation accurate to +/- 25-30% (AACE Class 4 estimate) sufficient for masterplan feasibility and design option comparison.
1. Building Construction Cost
1.1 Cost per m2 GFA by Building Type
Costs include structure, envelope, MEP, finishes, and contractor overhead and profit. Exclude land, professional fees, and site infrastructure (those are separate categories below).
Residential
| Type | Low | Medium | High | Premium |
|---|---|---|---|---|
| Detached house | $800 | $1,200 | $1,800 | $2,500+ |
| Townhouse / row house | $750 | $1,100 | $1,600 | $2,200+ |
| Low-rise apartment (1-3 floors) | $900 | $1,300 | $1,800 | $2,400+ |
| Mid-rise apartment (4-10 floors) | $1,100 | $1,600 | $2,200 | $3,000+ |
| High-rise apartment (11-25 floors) | $1,400 | $2,000 | $2,800 | $4,000+ |
| Super-tall apartment (25+ floors) | $2,000 | $2,800 | $4,000 | $6,000+ |
| Affordable housing (basic spec) | $600 | $900 | $1,200 | N/A |
| Student housing | $900 | $1,300 | $1,700 | $2,200 |
| Senior housing / care home | $1,200 | $1,800 | $2,500 | $3,500 |
Commercial
| Type | Low | Medium | High | Premium |
|---|---|---|---|---|
| Office (standard) | $1,200 | $1,800 | $2,500 | $3,500+ |
| Office (Grade A / LEED Platinum) | $1,800 | $2,500 | $3,500 | $5,000+ |
| Retail (shell and core) | $700 | $1,000 | $1,400 | $2,000 |
| Retail (fitted out) | $1,000 | $1,500 | $2,200 | $3,500+ |
| Hotel (3-star) | $1,400 | $2,000 | $2,800 | N/A |
| Hotel (5-star) | $2,500 | $3,500 | $5,000 | $8,000+ |
| Supermarket | $800 | $1,100 | $1,500 | $2,000 |
| Food hall / market | $900 | $1,400 | $2,000 | $3,000 |
What ships with it
4 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.
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.
- 12d ago First seen · 504 lines · 141 tokens per session scan A 0fb5fd87ecc6
cost-estimation is a skill published in the GitHub repository Abhinavbwj/Urban-Design-Skills-Claude (129 stars, last pushed 6mo ago), licensed MIT. It adds 141 tokens to every session and 6,034 once invoked, about $0.0007 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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