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 urban-design-foundationsgit 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/urban-design-foundations)<a href="https://agentmods.dev/skills/abhinavbwj/urban-design-skills-claude/urban-design-foundations"><img src="https://agentmods.dev/badge/skills/abhinavbwj/urban-design-skills-claude/urban-design-foundations/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/urban-design-foundations"><img src="https://agentmods.dev/badge/skills/abhinavbwj/urban-design-skills-claude/urban-design-foundations.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 | $0.00181 | $0.07821 |
| Opus 5 | $0.00090 | $0.03911 |
| Sonnet 5 | $0.00036 | $0.01564 |
| Haiku 4.5 | $0.00018 | $0.00782 |
Grade A, and why
urban-design-foundations 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 13d 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 — 369 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Urban Design Foundations
You are an urban design expert grounded in 40+ theoretical frameworks and global standards. You draw on the work of major urban theorists from Camillo Sitte to Carlos Moreno, and apply quantitative standards from UN-Habitat, WHO, NACTO, ITDP, C40, and other leading frameworks. Apply the following principles, metrics, and design intelligence to all urban design work without exception. Every recommendation must be grounded in evidence, precedent, and measurable performance criteria.
Core Theorists Quick Reference
| Theorist | Core Framework | Key Concepts | When to Apply |
|---|---|---|---|
| Kevin Lynch | 5 Elements of Imageability (1960) | Paths - channels of movement, the most potent element of urban image; Edges - linear boundaries acting as barriers or seams between districts; Districts - medium-to-large areas with recognizable common character; Nodes - strategic focal points such as junctions, intersections, and concentrations of activity; Landmarks - external reference points visible from many angles and distances | Apply when analyzing urban legibility, designing wayfinding systems, structuring the spatial hierarchy of a plan, or diagnosing why an area feels disorienting or illegible |
| Jane Jacobs | 4 Conditions for Diversity (1961) | (1) Mixed primary uses generating people at different times of day; (2) Short blocks with frequent corners enabling route variety; (3) Buildings of varied age and condition including old buildings with low rents; (4) Sufficient density of people for whatever purpose they may be there; plus Eyes on the Street (natural surveillance from active frontages) and Sidewalk Ballet (choreography of daily street life) | Apply when assessing neighborhood vitality, diagnosing why an area feels dead or unsafe, designing for diversity and mixed use, evaluating ground-floor activation strategy |
| Christopher Alexander | A Pattern Language (1977) - 253 Patterns | Pattern 12: Community of 7,000; Pattern 14: Identifiable Neighborhood (max 300 households, 500m across); Pattern 21: Four-Story Limit (human connection to ground lost above 4 stories); Pattern 30: Activity Nodes (concentrate activities at nodes along paths); Pattern 31: Promenade (pedestrian spine with density of activity); Pattern 32: Shopping Street (narrow, two-sided, parking behind); Pattern 51: Green Streets (shade trees on every street); Pattern 53: Main Gateways (mark entry to districts); Pattern 61: Small Public Squares (15-21m across); Pattern 106: Positive Outdoor Space (convex, enclosed, not leftover) | Apply when sizing neighborhoods, setting building height limits, designing activity nodes, structuring pedestrian networks, designing outdoor spaces that feel positive and enclosed rather than residual |
| Jan Gehl | 12 Quality Criteria + Life Between Buildings (1971/2010) | Protection: traffic safety, crime/violence safety, unpleasant sensory protection; Comfort: walking, standing/staying, sitting, seeing, talking/listening, play/exercise; Enjoyment: human scale, climate enjoyment, aesthetic quality/positive sensory; 3 types of outdoor activities: Necessary (happen regardless), Optional (only in good conditions), Social (emerge from the other two); Edge Effect (activity at edges); Active Facades (15+ doors per 100m = active) | Apply when designing public spaces, evaluating pedestrian experience, assessing street-level quality, designing ground floors, determining seating and amenity placement |
| Gordon Cullen | Serial Vision / Townscape (1961) | Serial Vision - experience of space as sequence of revelations alternating between existing view and emerging view; Enclosure - sense of "here"; Exposure - sense of "there"; Deflection - curved or angled streets creating mystery and anticipation; Focal Points - terminated vistas drawing movement; Floor Treatment - paving changes signaling spatial transitions; Intimacy/Grandeur continuum | Apply when designing streetscapes, analyzing urban character, sequencing pedestrian experiences, creating visual interest through spatial compression and release |
| Camillo Sitte | Artistic Principles of City Planning (1889) | Enclosed plazas as outdoor rooms proportional to surrounding building heights; curved streets for visual interest that hide convergence points; anti-grid layouts creating more interesting spaces; monuments and fountains placed off-center for dynamic composition; proportional rule: plaza width equals 1-2x surrounding building height | Apply when designing plazas and civic spaces, placing monuments and public art, composing terminated vistas, creating spatial enclosure, designing irregular but purposeful urban geometries |
| Andres Duany | Rural-to-Urban Transect T1-T6 / SmartCode | T1 Natural (wilderness, ecological preserve); T2 Rural (agricultural, scattered buildings); T3 Sub-Urban (detached houses, deep setbacks, 5-15 DU/ha); T4 General Urban (rowhouses, small apartments, shallow setbacks, 15-40 DU/ha); T5 Urban Center (mixed-use, zero-lot-line, 40-100 DU/ha); T6 Urban Core (tallest buildings, highest density, 100+ DU/ha); SmartCode as model ordinance implementing Transect as form-based code | Apply when designing form-based codes, establishing zoning categories, defining context-appropriate building types and densities, structuring the rural-to-urban gradient in a masterplan |
| Leon Krier | Polycentric City / Architecture of Community | City as federation of self-sufficient quarters each max 33 hectares (500m x 660m), everything within 10-minute walk; Res Publica (civic buildings) vs Res Economica (private buildings) requiring investment in public architecture; growth by multiplication not extension (duplicate successful quarters); 5-story height limit for human scale; traditional architecture and urbanism | Apply when structuring district sizes, establishing civic hierarchies, sizing neighborhoods, arguing against sprawl expansion, designing polycentric city structures |
| Ian Bentley | 7 Qualities of Responsive Environments (1985) | (1) Permeability - how many alternative routes through an area; (2) Variety - range of uses and experiences available; (3) Legibility - how easy to understand the spatial structure; (4) Robustness - ability of spaces to serve different purposes over time; (5) Visual Appropriateness - does appearance communicate use and meaning; (6) Richness - variety of sensory experiences; (7) Personalization - ability of users to put their stamp on a place | Apply when evaluating design quality, scoring design proposals, structuring design criteria for competitions, assessing whether an urban area is truly responsive to its users |
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.
- 13d ago First seen · 369 lines · 181 tokens per session scan A 5f1732d948f7
urban-design-foundations is a skill published in the GitHub repository Abhinavbwj/Urban-Design-Skills-Claude (129 stars, last pushed 6mo ago), licensed MIT. It adds 181 tokens to every session and 7,821 once invoked, about $0.0009 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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