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 linegel/threejs-complete-set-of-skill --skill threejs-procedural-buildings-and-citiesgit clone --depth 1 https://github.com/linegel/threejs-complete-set-of-skillWrote 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/linegel/threejs-complete-set-of-skill/threejs-procedural-buildings-and-cities)<a href="https://agentmods.dev/skills/linegel/threejs-complete-set-of-skill/threejs-procedural-buildings-and-cities"><img src="https://agentmods.dev/badge/skills/linegel/threejs-complete-set-of-skill/threejs-procedural-buildings-and-cities/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/linegel/threejs-complete-set-of-skill/threejs-procedural-buildings-and-cities"><img src="https://agentmods.dev/badge/skills/linegel/threejs-complete-set-of-skill/threejs-procedural-buildings-and-cities.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 | $0.00059 | $0.01505 |
| Opus 5.5 | $0.00024 | $0.00602 |
| Sonnet 5.5 | $0.00012 | $0.00301 |
| Haiku 4.5 | $0.00006 | $0.00151 |
Grade A, and why
threejs-procedural-buildings-and-cities 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 1mo 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 — 133 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Procedural Buildings and Cities
Treat architecture as a compiler: decide the runtime package, produce and validate a serializable plan, then emit geometry. The plan owns massing, exposed surfaces, placements, material slots, and stable identity.
Process
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Select the runtime package from mutability and repetition.
Workload Package Static building or chunk merged indexed BufferGeometryper material slotEditable varied modules BatchedMeshper compatible material slotRepeated identical topology spatially paged InstancedMeshDistrict-scale streaming bounded chunks with projected-error LOD Initialize
WebGPURendererbefore gating WebGPU features. Architecture planning can remain CPU-deterministic; add storage or compute only for a measured city-scale visibility or update bottleneck.Complete when: every architectural element has one package, and every package has an explicit mutability, visibility, and identity reason.
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Produce a valid building plan. Normalize units and settings, then apply the mass-operator rail: footprint pieces -> union/court subtraction -> extrude/stack -> inset/split -> optional connector. Choose only prevalidated alternatives; give every operator result a stable ID and validate it before the next operator. Read grammar-and-mesh-compiler.md when implementing these operators. Serialize footprints, mass volumes, exposed intervals, placements, module usage, ownership, material slots, UV scale, and budgets.
Complete when: the same inputs reproduce the same operator choices and IDs, every operator output passes its topology/dimension/ownership gate, and geometry emission is unnecessary to diagnose an invalid plan.
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Resolve exposed boundaries before facade placement. Subtract shared or blocked side regions with their vertical overlap; unequal-height neighbors require height bands, not whole-side removal. Quantize positive surviving spans into a bounded legal bay count, and attach facade, roof, trim, and corner placements to those surface regions. Read grammar-and-mesh-compiler.md when implementing footprint subtraction, bay quantization, placement ownership, or module-local frames.
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.
- 1mo ago Changed · +5 lines d9ba2057500a
- 2mo ago First seen · 128 lines · 59 tokens per session scan A 11e1aea375d4
threejs-procedural-buildings-and-cities is a skill published in the GitHub repository linegel/threejs-complete-set-of-skill (11 stars, last pushed 1mo ago), licensed ISC. It adds 59 tokens to every session and 1,505 once invoked, about $0.0002 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 2026-08-31.
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