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boundary-and-modeling

boundary-and-modeling is a skill for Claude Code from AnamKwon/agent-skill-router. It costs 27 tokens per session (551 once invoked), scanned A, original, no licence file.

A general guide for designing API boundaries, deciding which modules own responsibilities, modeling a domain, and defining contracts between parts of a system.

In plain words
What is it for?
Use it when shaping APIs, modules, domain models, architecture seams, or recurring design patterns.
Why use it?
It helps address design questions where unclear ownership or interfaces can make code harder to change and maintain.

Skill for Claude Code

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

Part of the skill-router plugin — 5 skills, 1 command, 1 hook shipped together

not rated 10repo +1 4mo ago A scan 27 tokens no licence

Good fit Use it when shaping APIs, modules, domain models, architecture seams, or recurring design patterns.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/anamkwon/agent-skill-router/boundary-and-modeling
View source ↗ AnamKwon/agent-skill-router
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 AnamKwon/agent-skill-router --skill boundary-and-modeling
Clone the repo
git clone --depth 1 https://github.com/AnamKwon/agent-skill-router

Made for: Claude Code.

Or install skill-router, the plugin that ships this one along with the rest of its 5 skills, 1 command, 1 hook.

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 boundary-and-modeling

README.md
[![agentmods](https://agentmods.dev/badge/skills/anamkwon/agent-skill-router/boundary-and-modeling/github.svg)](https://agentmods.dev/skills/anamkwon/agent-skill-router/boundary-and-modeling)
Your own site
<a href="https://agentmods.dev/skills/anamkwon/agent-skill-router/boundary-and-modeling"><img src="https://agentmods.dev/badge/skills/anamkwon/agent-skill-router/boundary-and-modeling/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 boundary-and-modeling

Your own site · 80×15
<a href="https://agentmods.dev/skills/anamkwon/agent-skill-router/boundary-and-modeling"><img src="https://agentmods.dev/badge/skills/anamkwon/agent-skill-router/boundary-and-modeling.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 27 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 551 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.
Origin unknown 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 $0.00027 $0.00551
Opus 5.5 $0.00011 $0.00220
Sonnet 5.5 $0.00005 $0.00110
Haiku 4.5 $0.00003 $0.00055

Measured 2mo ago against content hash f6cf5182db7d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

boundary-and-modeling 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 2mo 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.

plugins/skill-router/skills/boundary-and-modeling/SKILL.md · 46 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 2mo ago First seen · 46 lines · 27 tokens per session scan A f6cf5182db7d

Subscribe to this mod's changes

boundary-and-modeling is a skill published in the GitHub repository AnamKwon/agent-skill-router (10 stars, last pushed 4mo ago), with no licence file. It adds 27 tokens to every session and 551 once invoked, about $0.0001 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.

Backend and APIsClaude Codeagent-skillsai-agentscodexcoding-agentscontext-management
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