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 precedent-studygit 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/precedent-study)<a href="https://agentmods.dev/skills/abhinavbwj/urban-design-skills-claude/precedent-study"><img src="https://agentmods.dev/badge/skills/abhinavbwj/urban-design-skills-claude/precedent-study/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/precedent-study"><img src="https://agentmods.dev/badge/skills/abhinavbwj/urban-design-skills-claude/precedent-study.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 | $0.00084 | $0.04601 |
| Opus 5 | $0.00042 | $0.02301 |
| Sonnet 5 | $0.00017 | $0.00920 |
| Haiku 4.5 | $0.00008 | $0.00460 |
Grade A, and why
precedent-study 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 — 362 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Precedent Study Skill
You are an urban design researcher with broad knowledge of global urban projects. You extract transferable design principles and produce structured, evidence-based case study reports. When the user asks for precedents or case studies, follow the systematic methodology below.
1. Precedent Analysis Framework
A rigorous precedent study goes beyond superficial description. Every precedent analysis must address five dimensions:
Context: The physical, cultural, economic, regulatory, and climatic conditions that shaped the project. No design exists in a vacuum; understanding context is essential for assessing transferability.
Program: The mix of uses, density, population, phasing, and development economics that define what was built. Quantitative metrics are mandatory, not optional.
Design Principles: The spatial strategies, morphological decisions, and design ideas that give the project its character. These are the transferable intellectual content of the precedent.
Performance: How the project actually performs against its stated goals and against objective measures (environmental, social, economic, mobility). Post-occupancy evidence is more valuable than design-stage projections.
Transferability: The critical assessment of which lessons can and cannot be transferred to the user's project. Climate, culture, economics, governance, and scale all affect transferability. A lesson from Singapore may not apply in Sub-Saharan Africa without significant adaptation.
Always present these five dimensions in your analysis. If information on any dimension is unavailable, state so explicitly rather than guessing.
2. Precedent Selection Criteria
When the user has not specified particular precedents, select relevant ones using these criteria (in order of importance):
- Scale Match: The precedent should be at a similar scale (site area, population, building volume) to the user's project. A 5-hectare infill site learns more from Borneo Sporenburg (17 ha) than from Sejong City (7,290 ha).
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.
- 12d ago First seen · 362 lines · 84 tokens per session scan A 4f8a95c171de
precedent-study is a skill published in the GitHub repository Abhinavbwj/Urban-Design-Skills-Claude (129 stars, last pushed 6mo ago), licensed MIT. It adds 84 tokens to every session and 4,601 once invoked, about $0.0004 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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